Articles | Volume 20, issue 4
https://doi.org/10.5194/acp-20-2387-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-2387-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
28 Feb 2020
Research article |
| 28 Feb 2020
| 28 Feb 2020
Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines
Rachel A. Braun
Department of Chemical and Environmental Engineering, University of
Arizona, Tucson, AZ, USA
Mojtaba Azadi Aghdam
Department of Chemical and Environmental Engineering, University of
Arizona, Tucson, AZ, USA
Paola Angela Bañaga
Manila Observatory, Loyola Heights, Quezon City 1108, Philippines
Department of Physics, School of Science and Engineering, Ateneo de
Manila University, Loyola Heights, Quezon City 1108, Philippines
Grace Betito
Department of Physics, School of Science and Engineering, Ateneo de
Manila University, Loyola Heights, Quezon City 1108, Philippines
Maria Obiminda Cambaliza
Manila Observatory, Loyola Heights, Quezon City 1108, Philippines
Department of Physics, School of Science and Engineering, Ateneo de
Manila University, Loyola Heights, Quezon City 1108, Philippines
Melliza Templonuevo Cruz
Manila Observatory, Loyola Heights, Quezon City 1108, Philippines
Institute of Environmental Science and Meteorology, University of the
Philippines, Diliman, Quezon City 1101, Philippines
Genevieve Rose Lorenzo
Manila Observatory, Loyola Heights, Quezon City 1108, Philippines
Alexander B. MacDonald
Department of Chemical and Environmental Engineering, University of
Arizona, Tucson, AZ, USA
James Bernard Simpas
Manila Observatory, Loyola Heights, Quezon City 1108, Philippines
Department of Physics, School of Science and Engineering, Ateneo de
Manila University, Loyola Heights, Quezon City 1108, Philippines
Connor Stahl
Department of Chemical and Environmental Engineering, University of
Arizona, Tucson, AZ, USA
Department of Chemical and Environmental Engineering, University of
Arizona, Tucson, AZ, USA
Department of Hydrology and Atmospheric Sciences, University of
Arizona, Tucson, AZ, USA
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Aerosol and weather interactions in Southeast Asia are complex and understudied. An emerging aerosol climatology was established in Metro Manila, the Philippines, from aerosol particle physicochemical properties and meteorology, revealing five sources. Even with local traffic, transported smoke from biomass burning, aged dust, and cloud processing, background marine particles dominate and correspond to lower aerosol optical depth in Metro Manila compared to other Southeast Asian megacities.
Qian Xiao, Jiaoshi Zhang, Yang Wang, Luke D. Ziemba, Ewan Crosbie, Edward L. Winstead, Claire E. Robinson, Joshua P. DiGangi, Glenn S. Diskin, Jeffrey S. Reid, K. Sebastian Schmidt, Armin Sorooshian, Miguel Ricardo A. Hilario, Sarah Woods, Paul Lawson, Snorre A. Stamnes, and Jian Wang
Atmos. Chem. Phys., 23, 9853–9871, https://doi.org/10.5194/acp-23-9853-2023, https://doi.org/10.5194/acp-23-9853-2023, 2023
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Using recent airborne measurements, we show that the influences of anthropogenic emissions, transport, convective clouds, and meteorology lead to new particle formation (NPF) under a variety of conditions and at different altitudes in tropical marine environments. NPF is enhanced by fresh urban emissions in convective outflow but is suppressed in air masses influenced by aged urban emissions where reactive precursors are mostly consumed while particle surface area remains relatively high.
Armin Sorooshian, Mikhail D. Alexandrov, Adam D. Bell, Ryan Bennett, Grace Betito, Sharon P. Burton, Megan E. Buzanowicz, Brian Cairns, Eduard V. Chemyakin, Gao Chen, Yonghoon Choi, Brian L. Collister, Anthony L. Cook, Andrea F. Corral, Ewan C. Crosbie, Bastiaan van Diedenhoven, Joshua P. DiGangi, Glenn S. Diskin, Sanja Dmitrovic, Eva-Lou Edwards, Marta A. Fenn, Richard A. Ferrare, David van Gilst, Johnathan W. Hair, David B. Harper, Miguel Ricardo A. Hilario, Chris A. Hostetler, Nathan Jester, Michael Jones, Simon Kirschler, Mary M. Kleb, John M. Kusterer, Sean Leavor, Joseph W. Lee, Hongyu Liu, Kayla McCauley, Richard H. Moore, Joseph Nied, Anthony Notari, John B. Nowak, David Painemal, Kasey E. Phillips, Claire E. Robinson, Amy Jo Scarino, Joseph S. Schlosser, Shane T. Seaman, Chellappan Seethala, Taylor J. Shingler, Michael A. Shook, Kenneth A. Sinclair, William L. Smith Jr., Douglas A. Spangenberg, Snorre A. Stamnes, Kenneth L. Thornhill, Christiane Voigt, Holger Vömel, Andrzej P. Wasilewski, Hailong Wang, Edward L. Winstead, Kira Zeider, Xubin Zeng, Bo Zhang, Luke D. Ziemba, and Paquita Zuidema
Earth Syst. Sci. Data, 15, 3419–3472, https://doi.org/10.5194/essd-15-3419-2023, https://doi.org/10.5194/essd-15-3419-2023, 2023
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The NASA Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) produced a unique dataset for research into aerosol–cloud–meteorology interactions. HU-25 Falcon and King Air aircraft conducted systematic and spatially coordinated flights over the northwest Atlantic Ocean. This paper describes the ACTIVATE flight strategy, instrument and complementary dataset products, data access and usage details, and data application notes.
Edward Gryspeerdt, Adam C. Povey, Roy G. Grainger, Otto Hasekamp, N. Christina Hsu, Jane P. Mulcahy, Andrew M. Sayer, and Armin Sorooshian
Atmos. Chem. Phys., 23, 4115–4122, https://doi.org/10.5194/acp-23-4115-2023, https://doi.org/10.5194/acp-23-4115-2023, 2023
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The impact of aerosols on clouds is one of the largest uncertainties in the human forcing of the climate. Aerosol can increase the concentrations of droplets in clouds, but observational and model studies produce widely varying estimates of this effect. We show that these estimates can be reconciled if only polluted clouds are studied, but this is insufficient to constrain the climate impact of aerosol. The uncertainty in aerosol impact on clouds is currently driven by cases with little aerosol.
Hossein Dadashazar, Andrea F. Corral, Ewan Crosbie, Sanja Dmitrovic, Simon Kirschler, Kayla McCauley, Richard Moore, Claire Robinson, Joseph S. Schlosser, Michael Shook, K. Lee Thornhill, Christiane Voigt, Edward Winstead, Luke Ziemba, and Armin Sorooshian
Atmos. Chem. Phys., 22, 13897–13913, https://doi.org/10.5194/acp-22-13897-2022, https://doi.org/10.5194/acp-22-13897-2022, 2022
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Multi-season airborne data over the northwestern Atlantic show that organic mass fraction and the relative amount of oxygenated organics within that fraction are enhanced in droplet residual particles as compared to particles below and above cloud. In-cloud aqueous processing is shown to be a potential driver of this compositional shift in cloud. This implies that aerosol–cloud interactions in the region reduce aerosol hygroscopicity due to the jump in the organic : sulfate ratio in cloud.
Ewan Crosbie, Luke D. Ziemba, Michael A. Shook, Claire E. Robinson, Edward L. Winstead, K. Lee Thornhill, Rachel A. Braun, Alexander B. MacDonald, Connor Stahl, Armin Sorooshian, Susan C. van den Heever, Joshua P. DiGangi, Glenn S. Diskin, Sarah Woods, Paola Bañaga, Matthew D. Brown, Francesca Gallo, Miguel Ricardo A. Hilario, Carolyn E. Jordan, Gabrielle R. Leung, Richard H. Moore, Kevin J. Sanchez, Taylor J. Shingler, and Elizabeth B. Wiggins
Atmos. Chem. Phys., 22, 13269–13302, https://doi.org/10.5194/acp-22-13269-2022, https://doi.org/10.5194/acp-22-13269-2022, 2022
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The linkage between cloud droplet and aerosol particle chemical composition was analyzed using samples collected in a polluted tropical marine environment. Variations in the droplet composition were related to physical and dynamical processes in clouds to assess their relative significance across three cases that spanned a range of rainfall amounts. In spite of the pollution, sea salt still remained a major contributor to the droplet composition and was preferentially enhanced in rainwater.
Eva-Lou Edwards, Jeffrey S. Reid, Peng Xian, Sharon P. Burton, Anthony L. Cook, Ewan C. Crosbie, Marta A. Fenn, Richard A. Ferrare, Sean W. Freeman, John W. Hair, David B. Harper, Chris A. Hostetler, Claire E. Robinson, Amy Jo Scarino, Michael A. Shook, G. Alexander Sokolowsky, Susan C. van den Heever, Edward L. Winstead, Sarah Woods, Luke D. Ziemba, and Armin Sorooshian
Atmos. Chem. Phys., 22, 12961–12983, https://doi.org/10.5194/acp-22-12961-2022, https://doi.org/10.5194/acp-22-12961-2022, 2022
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This study compares NAAPS-RA model simulations of aerosol optical thickness (AOT) and extinction to those retrieved with a high spectral resolution lidar near the Philippines. Agreement for AOT was good, and extinction agreement was strongest below 1500 m. Substituting dropsonde relative humidities into NAAPS-RA did not drastically improve agreement, and we discuss potential reasons why. Accurately modeling future conditions in this region is crucial due to its susceptibility to climate change.
Edward Gryspeerdt, Daniel T. McCoy, Ewan Crosbie, Richard H. Moore, Graeme J. Nott, David Painemal, Jennifer Small-Griswold, Armin Sorooshian, and Luke Ziemba
Atmos. Meas. Tech., 15, 3875–3892, https://doi.org/10.5194/amt-15-3875-2022, https://doi.org/10.5194/amt-15-3875-2022, 2022
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Droplet number concentration is a key property of clouds, influencing a variety of cloud processes. It is also used for estimating the cloud response to aerosols. The satellite retrieval depends on a number of assumptions – different sampling strategies are used to select cases where these assumptions are most likely to hold. Here we investigate the impact of these strategies on the agreement with in situ data, the droplet number climatology and estimates of the indirect radiative forcing.
Simon Kirschler, Christiane Voigt, Bruce Anderson, Ramon Campos Braga, Gao Chen, Andrea F. Corral, Ewan Crosbie, Hossein Dadashazar, Richard A. Ferrare, Valerian Hahn, Johannes Hendricks, Stefan Kaufmann, Richard Moore, Mira L. Pöhlker, Claire Robinson, Amy J. Scarino, Dominik Schollmayer, Michael A. Shook, K. Lee Thornhill, Edward Winstead, Luke D. Ziemba, and Armin Sorooshian
Atmos. Chem. Phys., 22, 8299–8319, https://doi.org/10.5194/acp-22-8299-2022, https://doi.org/10.5194/acp-22-8299-2022, 2022
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In this study we show that the vertical velocity dominantly impacts the cloud droplet number concentration (NC) of low-level clouds over the western North Atlantic in the winter and summer season, while the cloud condensation nuclei concentration, aerosol size distribution and chemical composition impact NC within a season. The observational data presented in this study can evaluate and improve the representation of aerosol–cloud interactions for a wide range of conditions.
Joseph S. Schlosser, Connor Stahl, Armin Sorooshian, Yen Thi-Hoang Le, Ki-Joon Jeon, Peng Xian, Carolyn E. Jordan, Katherine R. Travis, James H. Crawford, Sung Yong Gong, Hye-Jung Shin, In-Ho Song, and Jong-sang Youn
Atmos. Chem. Phys., 22, 7505–7522, https://doi.org/10.5194/acp-22-7505-2022, https://doi.org/10.5194/acp-22-7505-2022, 2022
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During a major haze pollution episode in March 2019, anthropogenic emissions were dominant in the boundary layer over Incheon and Seoul, South Korea. Using supermicrometer and submicrometer size- and chemistry-resolved aerosol particle measurements taken during this haze pollution period, this work shows that local emissions and a shallow boundary layer, enhanced humidity, and low temperature promoted local heterogeneous formation of secondary inorganic and organic aerosol species.
Meloë S. F. Kacenelenbogen, Qian Tan, Sharon P. Burton, Otto P. Hasekamp, Karl D. Froyd, Yohei Shinozuka, Andreas J. Beyersdorf, Luke Ziemba, Kenneth L. Thornhill, Jack E. Dibb, Taylor Shingler, Armin Sorooshian, Reed W. Espinosa, Vanderlei Martins, Jose L. Jimenez, Pedro Campuzano-Jost, Joshua P. Schwarz, Matthew S. Johnson, Jens Redemann, and Gregory L. Schuster
Atmos. Chem. Phys., 22, 3713–3742, https://doi.org/10.5194/acp-22-3713-2022, https://doi.org/10.5194/acp-22-3713-2022, 2022
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The impact of aerosols on Earth's radiation budget and human health is important and strongly depends on their composition. One desire of our scientific community is to derive the composition of the aerosol from satellite sensors. However, satellites observe aerosol optical properties (and not aerosol composition) based on remote sensing instrumentation. This study assesses how much aerosol optical properties can tell us about aerosol composition.
Matthew W. Christensen, Andrew Gettelman, Jan Cermak, Guy Dagan, Michael Diamond, Alyson Douglas, Graham Feingold, Franziska Glassmeier, Tom Goren, Daniel P. Grosvenor, Edward Gryspeerdt, Ralph Kahn, Zhanqing Li, Po-Lun Ma, Florent Malavelle, Isabel L. McCoy, Daniel T. McCoy, Greg McFarquhar, Johannes Mülmenstädt, Sandip Pal, Anna Possner, Adam Povey, Johannes Quaas, Daniel Rosenfeld, Anja Schmidt, Roland Schrödner, Armin Sorooshian, Philip Stier, Velle Toll, Duncan Watson-Parris, Robert Wood, Mingxi Yang, and Tianle Yuan
Atmos. Chem. Phys., 22, 641–674, https://doi.org/10.5194/acp-22-641-2022, https://doi.org/10.5194/acp-22-641-2022, 2022
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Trace gases and aerosols (tiny airborne particles) are released from a variety of point sources around the globe. Examples include volcanoes, industrial chimneys, forest fires, and ship stacks. These sources provide opportunistic experiments with which to quantify the role of aerosols in modifying cloud properties. We review the current state of understanding on the influence of aerosol on climate built from the wide range of natural and anthropogenic laboratories investigated in recent decades.
Hossein Dadashazar, Majid Alipanah, Miguel Ricardo A. Hilario, Ewan Crosbie, Simon Kirschler, Hongyu Liu, Richard H. Moore, Andrew J. Peters, Amy Jo Scarino, Michael Shook, K. Lee Thornhill, Christiane Voigt, Hailong Wang, Edward Winstead, Bo Zhang, Luke Ziemba, and Armin Sorooshian
Atmos. Chem. Phys., 21, 16121–16141, https://doi.org/10.5194/acp-21-16121-2021, https://doi.org/10.5194/acp-21-16121-2021, 2021
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This study investigates precipitation impacts on long-range transport of North American outflow over the western North Atlantic Ocean (WNAO). Results demonstrate that precipitation scavenging plays a significant role in modifying surface aerosol concentrations over the WNAO, especially in winter and spring due to large-scale scavenging processes. This study highlights how precipitation impacts surface aerosol properties with relevance for other marine regions vulnerable to continental outflow.
Connor Stahl, Ewan Crosbie, Paola Angela Bañaga, Grace Betito, Rachel A. Braun, Zenn Marie Cainglet, Maria Obiminda Cambaliza, Melliza Templonuevo Cruz, Julie Mae Dado, Miguel Ricardo A. Hilario, Gabrielle Frances Leung, Alexander B. MacDonald, Angela Monina Magnaye, Jeffrey Reid, Claire Robinson, Michael A. Shook, James Bernard Simpas, Shane Marie Visaga, Edward Winstead, Luke Ziemba, and Armin Sorooshian
Atmos. Chem. Phys., 21, 14109–14129, https://doi.org/10.5194/acp-21-14109-2021, https://doi.org/10.5194/acp-21-14109-2021, 2021
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A total of 159 cloud water samples were collected and measured for total organic carbon (TOC) during CAMP2Ex. On average, 30 % of TOC was speciated based on carboxylic/sulfonic acids and dimethylamine. Results provide a critical constraint on cloud composition and vertical profiles of TOC and organic species ranging from ~250 m to ~ 7 km and representing a variety of cloud types and air mass source influences such as biomass burning, marine emissions, anthropogenic activity, and dust.
Hossein Dadashazar, David Painemal, Majid Alipanah, Michael Brunke, Seethala Chellappan, Andrea F. Corral, Ewan Crosbie, Simon Kirschler, Hongyu Liu, Richard H. Moore, Claire Robinson, Amy Jo Scarino, Michael Shook, Kenneth Sinclair, K. Lee Thornhill, Christiane Voigt, Hailong Wang, Edward Winstead, Xubin Zeng, Luke Ziemba, Paquita Zuidema, and Armin Sorooshian
Atmos. Chem. Phys., 21, 10499–10526, https://doi.org/10.5194/acp-21-10499-2021, https://doi.org/10.5194/acp-21-10499-2021, 2021
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This study investigates the seasonal cycle of cloud drop number concentration (Nd) over the western North Atlantic Ocean (WNAO) using multiple datasets. Reasons for the puzzling discrepancy between the seasonal cycles of Nd and aerosol concentration were identified. Results indicate that Nd is highest in winter (when aerosol proxy values are often lowest) due to conditions both linked to cold-air outbreaks and that promote greater droplet activation.
Genevieve Rose Lorenzo, Paola Angela Bañaga, Maria Obiminda Cambaliza, Melliza Templonuevo Cruz, Mojtaba AzadiAghdam, Avelino Arellano, Grace Betito, Rachel Braun, Andrea F. Corral, Hossein Dadashazar, Eva-Lou Edwards, Edwin Eloranta, Robert Holz, Gabrielle Leung, Lin Ma, Alexander B. MacDonald, Jeffrey S. Reid, James Bernard Simpas, Connor Stahl, Shane Marie Visaga, and Armin Sorooshian
Atmos. Chem. Phys., 21, 6155–6173, https://doi.org/10.5194/acp-21-6155-2021, https://doi.org/10.5194/acp-21-6155-2021, 2021
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Firework emissions change the physicochemical and optical properties of water-soluble particles, which subsequently alters the background aerosol’s respirability, influence on surroundings, ability to uptake gases, and viability as cloud condensation nuclei (CCN). There was heavy aerosol loading due to fireworks in the boundary layer. The aerosol constituents were largely water-soluble and submicrometer in size due to both inorganic salts in firework materials and gas-to-particle conversion.
Miguel Ricardo A. Hilario, Ewan Crosbie, Michael Shook, Jeffrey S. Reid, Maria Obiminda L. Cambaliza, James Bernard B. Simpas, Luke Ziemba, Joshua P. DiGangi, Glenn S. Diskin, Phu Nguyen, F. Joseph Turk, Edward Winstead, Claire E. Robinson, Jian Wang, Jiaoshi Zhang, Yang Wang, Subin Yoon, James Flynn, Sergio L. Alvarez, Ali Behrangi, and Armin Sorooshian
Atmos. Chem. Phys., 21, 3777–3802, https://doi.org/10.5194/acp-21-3777-2021, https://doi.org/10.5194/acp-21-3777-2021, 2021
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This study characterizes long-range transport from major Asian pollution sources into the tropical northwest Pacific and the impact of scavenging on these air masses. We combined aircraft observations, HYSPLIT trajectories, reanalysis, and satellite retrievals to reveal distinct composition and size distribution profiles associated with specific emission sources and wet scavenging. The results of this work have implications for international policymaking related to climate and health.
Connor Stahl, Melliza Templonuevo Cruz, Paola Angela Bañaga, Grace Betito, Rachel A. Braun, Mojtaba Azadi Aghdam, Maria Obiminda Cambaliza, Genevieve Rose Lorenzo, Alexander B. MacDonald, Miguel Ricardo A. Hilario, Preciosa Corazon Pabroa, John Robin Yee, James Bernard Simpas, and Armin Sorooshian
Atmos. Chem. Phys., 20, 15907–15935, https://doi.org/10.5194/acp-20-15907-2020, https://doi.org/10.5194/acp-20-15907-2020, 2020
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Long-term (16-month) high-frequency (weekly) measurements of size-resolved aerosol composition are reported. Important insights are discussed about factors (e.g., transport, fires, precipitation, photo-oxidation) impacting the mass size distributions of organic and sulfonic acids at a coastal megacity with diverse meteorology. The size-resolved nature of the data yielded one such finding that organic acids preferentially adsorb to dust rather than sea salt particles.
Alexander B. MacDonald, Ali Hossein Mardi, Hossein Dadashazar, Mojtaba Azadi Aghdam, Ewan Crosbie, Haflidi H. Jonsson, Richard C. Flagan, John H. Seinfeld, and Armin Sorooshian
Atmos. Chem. Phys., 20, 7645–7665, https://doi.org/10.5194/acp-20-7645-2020, https://doi.org/10.5194/acp-20-7645-2020, 2020
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Understanding how humans affect Earth's climate requires understanding of how particles in the air affect the number concentration of droplets in a cloud (Nd). We use the air-equivalent mass concentration of different chemical species contained in cloud water to predict Nd. In this study we found that the prediction of Nd is (1) best described by total sulfate; (2) improved when considering up to five species; and (3) dependent on factors like turbulence, smoke presence, and in-cloud height.
Hossein Dadashazar, Ewan Crosbie, Mohammad S. Majdi, Milad Panahi, Mohammad A. Moghaddam, Ali Behrangi, Michael Brunke, Xubin Zeng, Haflidi H. Jonsson, and Armin Sorooshian
Atmos. Chem. Phys., 20, 4637–4665, https://doi.org/10.5194/acp-20-4637-2020, https://doi.org/10.5194/acp-20-4637-2020, 2020
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Clearings in the marine-boundary-layer (MBL) cloud deck of the Pacific Ocean were studied. Remote sensing, reanalysis, and airborne data were used along with machine-learning modeling to characterize the spatiotemporal nature of clearings and factors governing their growth. The most significant implications of our results are linked to modeling of fog and MBL clouds, with implications for societal and environmental issues like climate, military operations, transportation, and coastal ecology.
Miguel Ricardo A. Hilario, Melliza T. Cruz, Maria Obiminda L. Cambaliza, Jeffrey S. Reid, Peng Xian, James B. Simpas, Nofel D. Lagrosas, Sherdon Niño Y. Uy, Steve Cliff, and Yongjing Zhao
Atmos. Chem. Phys., 20, 1255–1276, https://doi.org/10.5194/acp-20-1255-2020, https://doi.org/10.5194/acp-20-1255-2020, 2020
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The research apportions size-resolved aerosol contributions from the South China Sea during the Vasco research cruise in September 2011. As aerosols can affect precipitation rates and cloud formation, identifying sources is key to characterizing the region and developing our understanding of aerosol–cloud behavior. A strong biomass burning signal was identified using elemental particulate matter in the fine and ultrafine size ranges. Oil combustion, soil dust, and sea spray were also identified.
Melliza Templonuevo Cruz, Paola Angela Bañaga, Grace Betito, Rachel A. Braun, Connor Stahl, Mojtaba Azadi Aghdam, Maria Obiminda Cambaliza, Hossein Dadashazar, Miguel Ricardo Hilario, Genevieve Rose Lorenzo, Lin Ma, Alexander B. MacDonald, Preciosa Corazon Pabroa, John Robin Yee, James Bernard Simpas, and Armin Sorooshian
Atmos. Chem. Phys., 19, 10675–10696, https://doi.org/10.5194/acp-19-10675-2019, https://doi.org/10.5194/acp-19-10675-2019, 2019
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This study is the first to report size-resolved PM mass and composition in metro Manila, Philippines. The results, which focus on the southwest monsoon season (SWM), are important with regard to understanding the competition between local sources and long-range transport, characterizing the properties of aerosol impacted by both aqueous processing and wet scavenging, and providing contextual data for comparison with other monsoonal regions and coastal megacities.
Barbara Ervens, Armin Sorooshian, Abdulmonam M. Aldhaif, Taylor Shingler, Ewan Crosbie, Luke Ziemba, Pedro Campuzano-Jost, Jose L. Jimenez, and Armin Wisthaler
Atmos. Chem. Phys., 18, 16099–16119, https://doi.org/10.5194/acp-18-16099-2018, https://doi.org/10.5194/acp-18-16099-2018, 2018
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The paper presents a new framework that can be used to identify emission scenarios in which aerosol populations are most likely modified by chemical processes in clouds. We show that in neither very polluted nor in very clean air masses is this the case. Only if the ratio of possible aerosol mass precursors (sulfur dioxide, some organics) and preexisting aerosol mass is sufficiently high will aerosol particles show substantially modified physicochemical properties upon cloud processing.
William H. Brune, Xinrong Ren, Li Zhang, Jingqiu Mao, David O. Miller, Bruce E. Anderson, Donald R. Blake, Ronald C. Cohen, Glenn S. Diskin, Samuel R. Hall, Thomas F. Hanisco, L. Gregory Huey, Benjamin A. Nault, Jeff Peischl, Ilana Pollack, Thomas B. Ryerson, Taylor Shingler, Armin Sorooshian, Kirk Ullmann, Armin Wisthaler, and Paul J. Wooldridge
Atmos. Chem. Phys., 18, 14493–14510, https://doi.org/10.5194/acp-18-14493-2018, https://doi.org/10.5194/acp-18-14493-2018, 2018
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Thunderstorms pull in polluted air from near the ground, transport it up through clouds containing lightning, and deposit it at altitudes where airplanes fly. The resulting chemical mixture in this air reacts to form ozone and particles, which affect climate. In this study, aircraft observations of the reactive gases responsible for this chemistry generally agree with modeled values, even in ice clouds. Thus, atmospheric oxidation chemistry appears to be mostly understood for this environment.
Ewan Crosbie, Matthew D. Brown, Michael Shook, Luke Ziemba, Richard H. Moore, Taylor Shingler, Edward Winstead, K. Lee Thornhill, Claire Robinson, Alexander B. MacDonald, Hossein Dadashazar, Armin Sorooshian, Andreas Beyersdorf, Alexis Eugene, Jeffrey Collett Jr., Derek Straub, and Bruce Anderson
Atmos. Meas. Tech., 11, 5025–5048, https://doi.org/10.5194/amt-11-5025-2018, https://doi.org/10.5194/amt-11-5025-2018, 2018
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A new aircraft-mounted probe for collecting samples of cloud water has been designed, fabricated, and extensively tested. Cloud drop composition provides valuable insight into atmospheric processes, but separating liquid samples from the airstream in a controlled way at flight speeds has proven difficult. The features of the design have been analysed with detailed numerical flow simulations and the new probe has demonstrated improved efficiency and performance through extensive flight testing.
Hossein Dadashazar, Rachel A. Braun, Ewan Crosbie, Patrick Y. Chuang, Roy K. Woods, Haflidi H. Jonsson, and Armin Sorooshian
Atmos. Chem. Phys., 18, 1495–1506, https://doi.org/10.5194/acp-18-1495-2018, https://doi.org/10.5194/acp-18-1495-2018, 2018
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This study shows with airborne data that in the thin layer above stratocumulus clouds, the entrainment interface layer (EIL), aerosol size distributions are influenced both by new particle formation and by pollutants above and below the EIL. These results are important with regard to understanding aerosol–cloud–climate interactions as the aerosol in this layer can influence the characteristics of stratocumulus clouds, which are the dominant cloud type by global area.
Samuel A. Atwood, Jeffrey S. Reid, Sonia M. Kreidenweis, Donald R. Blake, Haflidi H. Jonsson, Nofel D. Lagrosas, Peng Xian, Elizabeth A. Reid, Walter R. Sessions, and James B. Simpas
Atmos. Chem. Phys., 17, 1105–1123, https://doi.org/10.5194/acp-17-1105-2017, https://doi.org/10.5194/acp-17-1105-2017, 2017
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Aerosol particles were measured by ship in remote marine regions of the South China Sea as part of the 2012 7 Southeast Asian Studies (7SEAS) experiments. As the particle populations changed throughout the experiment, the distribution of particle sizes and the amount of water that collected on them changed as well. These changes were associated with various impacts from smoke, sea salt, and pollution sources, and impact how clouds form and precipitation occurs in the region.
Eunsil Jung, Bruce A. Albrecht, Armin Sorooshian, Paquita Zuidema, and Haflidi H. Jonsson
Atmos. Chem. Phys., 16, 11395–11413, https://doi.org/10.5194/acp-16-11395-2016, https://doi.org/10.5194/acp-16-11395-2016, 2016
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We calculate the qualitative behavior of precipitation response to aerosol loadings with cloud depths for warm boundary layer clouds (stratocumulus and shallow marine cumulus), using aircraft measurements across four field campaigns. The finding shows that precipitation responds similarly to aerosol loadings for both stratocumulus and cumulus clouds, regardless of cloud type. Precipitation is most susceptible to aerosol perturbations in the medium–deep depth of clouds.
E. Crosbie, J.-S. Youn, B. Balch, A. Wonaschütz, T. Shingler, Z. Wang, W. C. Conant, E. A. Betterton, and A. Sorooshian
Atmos. Chem. Phys., 15, 6943–6958, https://doi.org/10.5194/acp-15-6943-2015, https://doi.org/10.5194/acp-15-6943-2015, 2015
E. Jung, B. A. Albrecht, H. H. Jonsson, Y.-C. Chen, J. H. Seinfeld, A. Sorooshian, A. R. Metcalf, S. Song, M. Fang, and L. M. Russell
Atmos. Chem. Phys., 15, 5645–5658, https://doi.org/10.5194/acp-15-5645-2015, https://doi.org/10.5194/acp-15-5645-2015, 2015
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To study the effect of giant cloud condensation nuclei (GCCN) on precipitation processes in stratocumulus clouds, 1-10 µm diameter salt particles were released from an aircraft while flying near the cloud top off the central coast of California. The analyses suggest that GCCN result in a four-fold increase in the cloud base rainfall rate and depletion of the cloud water due to rainout.
S. P. Hersey, R. M. Garland, E. Crosbie, T. Shingler, A. Sorooshian, S. Piketh, and R. Burger
Atmos. Chem. Phys., 15, 4259–4278, https://doi.org/10.5194/acp-15-4259-2015, https://doi.org/10.5194/acp-15-4259-2015, 2015
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A decadal aerosol climatology of South Africa's major metropolitan areas is presented, utilizing data from multiple satellite platforms and 19 ground-monitoring sites. Remotely sensed data are dominated by a seasonal signal corresponding to transported biomass burning during austral spring, while ground data are dominated by domestic burning in low-income areas during austral winter. We report poor agreement between satellite- and ground-based aerosol measurements.
A. Wonaschütz, M. Coggon, A. Sorooshian, R. Modini, A. A. Frossard, L. Ahlm, J. Mülmenstädt, G. C. Roberts, L. M. Russell, S. Dey, F. J. Brechtel, and J. H. Seinfeld
Atmos. Chem. Phys., 13, 9819–9835, https://doi.org/10.5194/acp-13-9819-2013, https://doi.org/10.5194/acp-13-9819-2013, 2013
A. Sorooshian, T. Shingler, A. Harpold, C. W. Feagles, T. Meixner, and P. D. Brooks
Atmos. Chem. Phys., 13, 7361–7379, https://doi.org/10.5194/acp-13-7361-2013, https://doi.org/10.5194/acp-13-7361-2013, 2013
Related subject area
Subject: Aerosols | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
Molecular characterization of organic aerosols in urban and forested areas of Paris using high-resolution mass spectrometry
Measurement report: Wintertime aerosol characterization at an urban traffic site in Helsinki, Finland
Source apportionment and ecotoxicity of PM2.5 pollution events in a major Southern Hemisphere megacity: influence of a biofuel-impacted fleet and biomass burning
Marine organic aerosol at Mace Head: effects from phytoplankton and source region variability
Measurement report: Sources and meteorology influencing highly time-resolved PM2.5 trace elements at three urban sites in the extremely polluted Indo-Gangetic Plain in India
Formation of highly absorptive secondary brown carbon through nighttime multiphase chemistry of biomass burning emissions
Measurement report: Vertically resolved atmospheric properties observed over the Southern Great Plains with the ArcticShark uncrewed aerial system
Technical note: Towards a stronger observational support for haze pollution control by interpreting carbonaceous aerosol results derived from different measurement approaches
Non-biogenic sources are an important but overlooked contributor to aerosol isoprene-derived organosulfates during winter in northern China
The critical role of aqueous-phase processes in aromatic-derived nitrogen-containing organic aerosol formation in cities with different energy consumption patterns
Characterization of atmospheric water-soluble brown carbon in the Athabasca oil sands region, Canada
Sensitivity of aerosol and cloud properties to coupling strength of marine boundary layer clouds over the northwest Atlantic
Measurement Report: Molecular composition, sources, and evolution of atmospheric organic aerosols in a basin city in China
Burning conditions and transportation pathways determine biomass-burning aerosol properties in the Ascension Island marine boundary layer
Observations of high-time-resolution and size-resolved aerosol chemical composition and microphysics in the central Arctic: implications for climate-relevant particle properties
Measurement report: Brown carbon aerosol in rural Germany – sources, chemistry, and diurnal variations
Particle flux-gradient relationships in the high Arctic: Emission and deposition patterns across three surface types
Climatology of aerosol pH and its controlling factors at the Melpitz continental background site in central Europe
Multiple eco-regions contribute to the seasonal cycle of Antarctic aerosol size distributions
Seasonal investigation of ultrafine-particle organic composition in an eastern Amazonian rainforest
Characterizing lead-rich particles in Beijing's atmosphere following coal-to-gas conversion: Insights from single particle aerosol mass spectrometry
High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years – Part 2: Seasonal and temporal trends in refractory black carbon originated from fossil fuel combustion and biomass burning
Direct measurement of N2O5 heterogeneous uptake coefficients on atmospheric aerosols in southwestern China and evaluation of current parameterizations
Measurement report: Per- and polyfluoroalkyl substances (PFAS) in particulate matter (PM10) from activated sludge aeration
Significant role of biomass burning in heavy haze formation in Nanjing, a megacity in China: molecular-level insights from intensive PM2.5 sampling on winter hazy days
Widespread trace bromine and iodine in remote tropospheric non-sea-salt aerosols
Significant contributions of biomass burning to PM2.5-bound aromatic compounds: insights from field observations and quantum chemical calculations
A 60-year atmospheric nitrate isotope record from a Southeast Greenland ice core with minimal post-depositional alteration
Iron isotopes reveal significant aerosol dissolution over the Pacific Ocean
Formation and chemical evolution of secondary organic aerosol in two different environments: a dual-chamber study
Enrichment of organic nitrogen in fog residuals observed in the Italian Po Valley
Technical note: Quantified organic aerosol subsaturated hygroscopicity by a simple optical scatter monitor system through field measurements
Measurement report: Oxidation potential of water-soluble aerosol components in the south and north of Beijing
Enhanced daytime secondary aerosol formation driven by gas–particle partitioning in downwind urban plumes
Technical note: Reconstructing surface missing aerosol elemental carbon data in long-term series with ensemble learning
Understanding the mechanism and importance of brown carbon bleaching across the visible spectrum in biomass burning plumes from the WE-CAN campaign
Influence of terrestrial and marine air mass on the constituents and intermixing of bioaerosols over a coastal atmosphere
A multi-site passive approach to studying the emissions and evolution of smoke from prescribed fires
The annual cycle and sources of relevant aerosol precursor vapors in the central Arctic during the MOSAiC expedition
Enhanced emission of intermediate/semi-volatile organic matters in both gas and particle phases from ship exhausts with low-sulfur fuels
Advances in characterization of black carbon particles and their associated coatings using the soot particle aerosol mass spectrometer in Singapore, a complex city environment
Measurement report: Crustal materials play an increasing role in elevating particle pH: Insights from 12-year records in a typical inland city of China
African dust transported to Barbados in the Wintertime Lacks Indicators of Chemical Aging
Opinion: How will advances in aerosol science inform our understanding of the health impacts of outdoor particulate pollution?
Machine Learning Assisted Chemical Characterization and Optical Properties of Atmospheric Brown Carbon in Nanjing, China
Measurement report: Intra-annual variability of black carbon and brown carbon and their interrelation with meteorological conditions over Gangtok, Sikkim
Long-range transport of air pollutants increases the concentration of hazardous components of PM2.5 in northern South America
Dominant influence of biomass combustion and cross-border transport on nitrogen-containing organic compound levels in the southeastern Tibetan Plateau
Impacts of elevated anthropogenic emissions on physicochemical characteristics of black-carbon-containing particles over the Tibetan Plateau
Online characterization of primary and secondary emissions of particulate matter and acidic molecules from a modern fleet of city buses
Diana L. Pereira, Chiara Giorio, Aline Gratien, Alexander Zherebker, Gael Noyalet, Servanne Chevaillier, Stéphanie Alage, Elie Almarj, Antonin Bergé, Thomas Bertin, Mathieu Cazaunau, Patrice Coll, Ludovico Di Antonio, Sergio Harb, Johannes Heuser, Cécile Gaimoz, Oscar Guillemant, Brigitte Language, Olivier Lauret, Camilo Macias, Franck Maisonneuve, Bénédicte Picquet-Varrault, Raquel Torres, Sylvain Triquet, Pascal Zapf, Lelia Hawkins, Drew Pronovost, Sydney Riley, Pierre-Marie Flaud, Emilie Perraudin, Pauline Pouyes, Eric Villenave, Alexandre Albinet, Olivier Favez, Robin Aujay-Plouzeau, Vincent Michoud, Christopher Cantrell, Manuela Cirtog, Claudia Di Biagio, Jean-François Doussin, and Paola Formenti
Atmos. Chem. Phys., 25, 4885–4905, https://doi.org/10.5194/acp-25-4885-2025, https://doi.org/10.5194/acp-25-4885-2025, 2025
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In order to study aerosols in environments influenced by anthropogenic and biogenic emissions, we performed analyses of samples collected during the ACROSS (Atmospheric Chemistry Of the Suburban Forest) campaign in summer 2022 in the greater Paris area. After analysis of the chemical composition by means of total carbon determination and high-resolution mass spectrometry, this work highlights the influence of anthropogenic inputs on the chemical composition of both urban and forested areas.
Kimmo Teinilä, Sanna Saarikoski, Henna Lintusaari, Teemu Lepistö, Petteri Marjanen, Minna Aurela, Heidi Hellén, Toni Tykkä, Markus Lampimäki, Janne Lampilahti, Luis Barreira, Timo Mäkelä, Leena Kangas, Juha Hatakka, Sami Harni, Joel Kuula, Jarkko V. Niemi, Harri Portin, Jaakko Yli-Ojanperä, Ville Niemelä, Milja Jäppi, Katrianne Lehtipalo, Joonas Vanhanen, Liisa Pirjola, Hanna E. Manninen, Tuukka Petäjä, Topi Rönkkö, and Hilkka Timonen
Atmos. Chem. Phys., 25, 4907–4928, https://doi.org/10.5194/acp-25-4907-2025, https://doi.org/10.5194/acp-25-4907-2025, 2025
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Physical and chemical properties of particulate matter and concentrations of trace gases were measured in a street canyon in Helsinki, Finland, and an urban background site in January–February 2022 to investigate the effect of wintertime conditions on pollutants. State-of-the-art instruments and a mobile laboratory were used, and the measurement data were analysed further with modelling tools like positive matrix factorization and the Pollution Detection Algorithm.
Guilherme Martins Pereira, Leonardo Yoshiaki Kamigauti, Rubens Fabio Pereira, Djacinto Monteiro dos Santos, Thayná da Silva Santos, José Vinicius Martins, Célia Alves, Cátia Gonçalves, Ismael Casotti Rienda, Nora Kováts, Thiago Nogueira, Luciana Rizzo, Paulo Artaxo, Regina Maura de Miranda, Marcia Akemi Yamasoe, Edmilson Dias de Freitas, Pérola de Castro Vasconcellos, and Maria de Fatima Andrade
Atmos. Chem. Phys., 25, 4587–4616, https://doi.org/10.5194/acp-25-4587-2025, https://doi.org/10.5194/acp-25-4587-2025, 2025
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The chemical composition of fine particulate matter was studied in the megacity of São Paulo (Brazil) during a polluted period. Vehicular-related sources remain relevant; however, a high contribution of biomass burning was observed and correlated with sample ecotoxicity. Emerging biomass burning sources, such as forest fires and sugarcane-bagasse-based power plants, highlight the need for additional control measures alongside stricter rules concerning vehicular emissions.
Emmanuel Chevassus, Kirsten N. Fossum, Darius Ceburnis, Lu Lei, Chunshui Lin, Wei Xu, Colin O'Dowd, and Jurgita Ovadnevaite
Atmos. Chem. Phys., 25, 4107–4129, https://doi.org/10.5194/acp-25-4107-2025, https://doi.org/10.5194/acp-25-4107-2025, 2025
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This study presents the first source apportionment of organic aerosol at Mace Head via high-resolution mass spectrometry. Introducing transfer entropy as a novel method reveals that aged organic aerosol originates from both open-ocean ozonolysis and local peat-burning oxidation. Methanesulfonic acid and organic sea spray both mirror phytoplankton activity, with the former closely tied to coccolithophore blooms and the latter linked to diatoms, chlorophytes, and cyanobacteria.
Ashutosh K. Shukla, Sachchida N. Tripathi, Shamitaksha Talukdar, Vishnu Murari, Sreenivas Gaddamidi, Manousos-Ioannis Manousakas, Vipul Lalchandani, Kuldeep Dixit, Vinayak M. Ruge, Peeyush Khare, Mayank Kumar, Vikram Singh, Neeraj Rastogi, Suresh Tiwari, Atul K. Srivastava, Dilip Ganguly, Kaspar Rudolf Daellenbach, and André S. H. Prévôt
Atmos. Chem. Phys., 25, 3765–3784, https://doi.org/10.5194/acp-25-3765-2025, https://doi.org/10.5194/acp-25-3765-2025, 2025
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Our study delves into the elemental composition of aerosols at three sites across the Indo-Gangetic Plain (IGP), revealing distinct patterns during pollution episodes. We found significant increases in chlorine (Cl)-rich and solid fuel combustion (SFC) sources, indicating dynamic emission sources, agricultural burning impacts, and meteorological influences. Surges in Cl-rich particles during cold periods highlight their role in particle growth under high-relative-humidity conditions.
Ye Kuang, Biao Luo, Shan Huang, Junwen Liu, Weiwei Hu, Yuwen Peng, Duohong Chen, Dingli Yue, Wanyun Xu, Bin Yuan, and Min Shao
Atmos. Chem. Phys., 25, 3737–3752, https://doi.org/10.5194/acp-25-3737-2025, https://doi.org/10.5194/acp-25-3737-2025, 2025
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This research reveals the potential importance of nighttime NO3 radical chemistry and aerosol water in the rapid formation of secondary brown carbon from diluted biomass burning emissions. The findings enhance our understanding of nighttime biomass burning evolution and its implications for climate and regional air quality, especially regarding interactions with background aerosol water and water-rich fogs and clouds.
Fan Mei, Qi Zhang, Damao Zhang, Jerome D. Fast, Gourihar Kulkarni, Mikhail S. Pekour, Christopher R. Niedek, Susanne Glienke, Israel Silber, Beat Schmid, Jason M. Tomlinson, Hardeep S. Mehta, Xena Mansoura, Zezhen Cheng, Gregory W. Vandergrift, Nurun Nahar Lata, Swarup China, and Zihua Zhu
Atmos. Chem. Phys., 25, 3425–3444, https://doi.org/10.5194/acp-25-3425-2025, https://doi.org/10.5194/acp-25-3425-2025, 2025
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This study highlights the unique capability of the ArcticShark, an uncrewed aerial system, in measuring vertically resolved atmospheric properties. Data from 32 research flights in 2023 reveal seasonal patterns and correlations with conventional measurements. The consistency and complementarity of in situ and remote sensing methods are highlighted. The study demonstrates the ArcticShark’s versatility in bridging data gaps and improving the understanding of vertical atmospheric structures.
Yuan Cheng, Ying-jie Zhong, Zhi-qing Zhang, Xu-bing Cao, and Jiu-meng Liu
EGUsphere, https://doi.org/10.5194/egusphere-2025-537, https://doi.org/10.5194/egusphere-2025-537, 2025
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As an emerging hotspot of atmospheric sciences, Northeast China is distinct due to the frigid winter and the strong emissions from agricultural fires. Based on field campaigns conducted in Harbin, we successively identified the analytical method that could lead to proper results of organic and elemental carbon. Our results are believed to be a support for future efforts on exploration of the PM2.5 sources in Northeast China, which are essential for further improving the regional air quality.
Ting Yang, Yu Xu, Yu-Chen Wang, Yi-Jia Ma, Hong-Wei Xiao, Hao Xiao, and Hua-Yun Xiao
Atmos. Chem. Phys., 25, 2967–2978, https://doi.org/10.5194/acp-25-2967-2025, https://doi.org/10.5194/acp-25-2967-2025, 2025
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Previous measurement–model comparisons of atmospheric isoprene levels showed a significant unidentified source of isoprene in some northern Chinese cities during winter. Here, the first combination of large-scale observations and field combustion experiments provides novel insights into biomass burning emissions as a significant source of isoprene-derived organosulfates during winter in northern cities of China.
Yi-Jia Ma, Yu Xu, Ting Yang, Lin Gui, Hong-Wei Xiao, Hao Xiao, and Hua-Yun Xiao
Atmos. Chem. Phys., 25, 2763–2780, https://doi.org/10.5194/acp-25-2763-2025, https://doi.org/10.5194/acp-25-2763-2025, 2025
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The abundance, potential precursors, and main formation mechanisms of nitrogen-containing organic compounds (NOCs) in PM2.5 during winter were compared among cities with different energy consumption patterns. The aerosol NOC pollution during winter in China is closely associated with the intensity of precursor emissions and the aqueous-phase processes. Our results highlight the importance of emission reduction strategies in controlling aerosol NOCs pollution during winter in China.
Dane Blanchard, Mark Gordon, Duc Huy Dang, Paul Andrew Makar, and Julian Aherne
Atmos. Chem. Phys., 25, 2423–2442, https://doi.org/10.5194/acp-25-2423-2025, https://doi.org/10.5194/acp-25-2423-2025, 2025
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This study offers the first known evaluation of water-soluble brown carbon aerosols in the Athabasca oil sands region (AOSR), Canada. Fluorescence spectroscopy analysis of aerosol samples from five regional sites (collected during the summer of 2021) identified oil sands operations as a measurable brown carbon source. Industrial aerosol emissions were unlikely to impact regional radiative forcing. These findings show that fluorescence spectroscopy can be used to monitor brown carbon in the AOSR.
Kira Zeider, Kayla McCauley, Sanja Dmitrovic, Leong Wai Siu, Yonghoon Choi, Ewan C. Crosbie, Joshua P. DiGangi, Glenn S. Diskin, Simon Kirschler, John B. Nowak, Michael A. Shook, Kenneth L. Thornhill, Christiane Voigt, Edward L. Winstead, Luke D. Ziemba, Paquita Zuidema, and Armin Sorooshian
Atmos. Chem. Phys., 25, 2407–2422, https://doi.org/10.5194/acp-25-2407-2025, https://doi.org/10.5194/acp-25-2407-2025, 2025
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In situ aircraft data collected over the northwest Atlantic Ocean are utilized to compare aerosol conditions and turbulence between near-surface and below-cloud-base altitudes for different regimes of coupling strength between those two levels, along with how cloud microphysical properties vary across those regimes. Stronger coupling yields more homogenous aerosol structure vertically along with higher cloud drop concentrations and sea salt influence in clouds.
Junke Zhang, Xinyi Fu, Chunying Chen, Yunfei Su, Siyu Liu, Luyao Chen, Yubao Chen, Gehui Wang, and Andre S. H. Prevot
EGUsphere, https://doi.org/10.5194/egusphere-2025-92, https://doi.org/10.5194/egusphere-2025-92, 2025
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The 125 organic aerosol (OA) compounds in PM2.5 in winter in Chengdu were measured at the molecular level. OA was dominated by fatty acids, phthalate esters, and anhydrosugars, and were deeply influenced by anthropogenic sources. As pollution worsens: secondary inorganic species and secondary organic carbon (OC) dominated the increase in PM2.5; fatty acids and anhydrosugars dominated the increase in OA; and the contribution of secondary formation and biomass burning to OC increased markedly.
Amie Dobracki, Ernie R. Lewis, Arthur J. Sedlacek III, Tyler Tatro, Maria A. Zawadowicz, and Paquita Zuidema
Atmos. Chem. Phys., 25, 2333–2363, https://doi.org/10.5194/acp-25-2333-2025, https://doi.org/10.5194/acp-25-2333-2025, 2025
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Biomass-burning aerosol is commonly present in the marine boundary layer over the southeast Atlantic Ocean between June and October. Our research indicates that burning conditions, aerosol transport pathways, and prolonged oxidation processes (heterogeneous and aqueous phases) determine the chemical, microphysical, and optical properties of the boundary layer aerosol. Notably, we find that the aerosol optical properties can be estimated from the chemical properties alone.
Benjamin Heutte, Nora Bergner, Hélène Angot, Jakob B. Pernov, Lubna Dada, Jessica A. Mirrielees, Ivo Beck, Andrea Baccarini, Matthew Boyer, Jessie M. Creamean, Kaspar R. Daellenbach, Imad El Haddad, Markus M. Frey, Silvia Henning, Tiia Laurila, Vaios Moschos, Tuukka Petäjä, Kerri A. Pratt, Lauriane L. J. Quéléver, Matthew D. Shupe, Paul Zieger, Tuija Jokinen, and Julia Schmale
Atmos. Chem. Phys., 25, 2207–2241, https://doi.org/10.5194/acp-25-2207-2025, https://doi.org/10.5194/acp-25-2207-2025, 2025
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Limited aerosol measurements in the central Arctic hinder our understanding of aerosol–climate interactions in the region. Our year-long observations of aerosol physicochemical properties during the MOSAiC expedition reveal strong seasonal variations in aerosol chemical composition, where the short-term variability is heavily affected by storms in the Arctic. Local wind-generated particles are shown to be an important source of cloud seeds, especially in autumn.
Feng Jiang, Harald Saathoff, Uzoamaka Ezenobi, Junwei Song, Hengheng Zhang, Linyu Gao, and Thomas Leisner
Atmos. Chem. Phys., 25, 1917–1930, https://doi.org/10.5194/acp-25-1917-2025, https://doi.org/10.5194/acp-25-1917-2025, 2025
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The chemical composition of brown carbon in the particle and gas phase was determined by mass spectrometry. BrC in the gas phase was mainly controlled by secondary formation and particle-to-gas partitioning. BrC in the particle phase was mainly from secondary formation. This work helps to get a better understanding of diurnal variations and the sources of brown carbon aerosol at a rural location in central Europe.
Theresa Mathes, Heather Guy, John Prytherch, Julia Kojoj, Ian Brooks, Sonja Murto, Paul Zieger, Birgit Wehner, Michael Tjernström, and Andreas Held
EGUsphere, https://doi.org/10.5194/egusphere-2025-183, https://doi.org/10.5194/egusphere-2025-183, 2025
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The Arctic is warming faster than the global average and aerosol-cloud-sea-ice interactions are crucial for studying its climate system. During the ARTofMELT Expedition 2023, particle and sensible heat fluxes were measured over multiple surfaces. Wide lead surfaces acted as particle sources with the strongest sensible heat fluxes, while closed ice surfaces acted as a particle sink. This study improves methods to measure these interactions, enhancing our understanding of Arctic climate processes.
Vikram Pratap, Christopher J. Hennigan, Bastian Stieger, Andreas Tilgner, Laurent Poulain, Dominik van Pinxteren, Gerald Spindler, and Hartmut Herrmann
EGUsphere, https://doi.org/10.5194/egusphere-2025-457, https://doi.org/10.5194/egusphere-2025-457, 2025
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In this work, we characterize trends in aerosol pH and its controlling factors over the period of 2010 – 2019 at the Melpitz research station in eastern Germany. We find strong trends in aerosol pH and major inorganic species in response to changing emissions. We conduct a detailed thermodynamic analysis of the aerosol system and discuss implications for controlling PM2.5 in the region.
James Brean, David C. S. Beddows, Eija Asmi, Aki Virkkula, Lauriane L. J. Quéléver, Mikko Sipilä, Floortje Van Den Heuvel, Thomas Lachlan-Cope, Anna Jones, Markus Frey, Angelo Lupi, Jiyeon Park, Young Jun Yoon, Rolf Weller, Giselle L. Marincovich, Gabriela C. Mulena, Roy M. Harrison, and Manuel Dall'Osto
Atmos. Chem. Phys., 25, 1145–1162, https://doi.org/10.5194/acp-25-1145-2025, https://doi.org/10.5194/acp-25-1145-2025, 2025
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Our results emphasise how understanding the geographical variation in surface types across the Antarctic is key to understanding secondary aerosol sources.
Adam E. Thomas, Hayley S. Glicker, Alex B. Guenther, Roger Seco, Oscar Vega Bustillos, Julio Tota, Rodrigo A. F. Souza, and James N. Smith
Atmos. Chem. Phys., 25, 959–977, https://doi.org/10.5194/acp-25-959-2025, https://doi.org/10.5194/acp-25-959-2025, 2025
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We present measurements of the organic composition of ultrafine particles collected from the eastern Amazon, an understudied region that is subjected to increasing human influence. We find that while isoprene chemistry is likely significant for ultrafine-particle growth throughout the year, compounds related to other sources, such as biological-spore emissions and biomass burning, exhibit striking seasonal differences, implying extensive variation in regional ultrafine-particle sources.
Xiufeng Lian, Yongjiang Xu, Fengxian Liu, Long Peng, Xiaodong Hu, Guigang Tang, Xu Dao, Hui Guo, Liwei Wang, Bo Huang, Chunlei Cheng, Lei Li, Guohua Zhang, Xinhui Bi, Xiaofei Wang, Zhen Zhou, and Mei Li
EGUsphere, https://doi.org/10.5194/egusphere-2024-3469, https://doi.org/10.5194/egusphere-2024-3469, 2025
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In this study, we analyzed the mixing state and atmospheric chemical processes of Pb-rich single particles in Beijing. Then, we focused on analyzing the differences in Pb-rich particles between the heating period and non-heating period, as well as the formation mechanism of lead nitrate after coal-to-gas conversion. Our results highlighted the improvement of coal-to-gas conversion on Pb in the particulate.
Kumiko Goto-Azuma, Yoshimi Ogawa-Tsukagawa, Kaori Fukuda, Koji Fujita, Motohiro Hirabayashi, Remi Dallmayr, Jun Ogata, Nobuhiro Moteki, Tatsuhiro Mori, Sho Ohata, Yutaka Kondo, Makoto Koike, Sumito Matoba, Moe Kadota, Akane Tsushima, Naoko Nagatsuka, and Teruo Aoki
Atmos. Chem. Phys., 25, 657–683, https://doi.org/10.5194/acp-25-657-2025, https://doi.org/10.5194/acp-25-657-2025, 2025
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Monthly ice core records spanning 350 years from Greenland show trends in refractory black carbon (rBC) concentrations and sizes. rBC levels have increased since the 1870s due to the inflow of anthropogenic rBC, with larger diameters than those from biomass burning (BB) rBC. High summer BB rBC peaks may reduce the ice sheet albedo, but BB rBC showed no increase until the early 2000s. These results are vital for validating aerosol and climate models.
Jiayin Li, Tianyu Zhai, Xiaorui Chen, Haichao Wang, Shuyang Xie, Shiyi Chen, Chunmeng Li, Huabin Dong, and Keding Lu
EGUsphere, https://doi.org/10.5194/egusphere-2024-3804, https://doi.org/10.5194/egusphere-2024-3804, 2025
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We directly measured the dinitrogen pentoxide (N2O5) uptake coefficient which critical impact the NOx fate and particulate nitrate formation in a typical highland city, Kunming, in China. We found the performance of current γ(N2O5) parameterizations showed deviations with the varying aerosol liquid water content (ALWC). Such differences would lead to biased estimation on particulate nitrate production potential. Our findings suggest the directions for future studies.
Jishnu Pandamkulangara Kizhakkethil, Zongbo Shi, Anna Bogush, and Ivan Kourtchev
EGUsphere, https://doi.org/10.5194/egusphere-2024-3952, https://doi.org/10.5194/egusphere-2024-3952, 2025
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Pollution with per- and polyfluoroalkyl substances (PFAS) received attention due to their environmental persistence and bioaccumulation. PM10 collected above a scaled-down activated sludge tank treating domestic sewage for a population >10,000 people in the UK were analysed for a range of short-, medium- and long-chain PFAS. Eight PFAS were detected in the PM10. Our results suggest that wastewater treatment processes i.e. activated sludge aeration could aerosolise PFAS into airborne PM.
Mingjie Kang, Mengying Bao, Wenhuai Song, Aduburexiati Abulimiti, Changliu Wu, Fang Cao, Sönke Szidat, and Yanlin Zhang
Atmos. Chem. Phys., 25, 73–91, https://doi.org/10.5194/acp-25-73-2025, https://doi.org/10.5194/acp-25-73-2025, 2025
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Reports on molecular-level knowledge of high-temporal-resolution particulate matter ≤2.5 µm in diameter (PM2.5) on hazy days are limited. We investigated various PM2.5 species and their sources. The results show biomass burning (BB) was the main source of organic carbon. Moreover, BB enhanced fungal spore emissions and secondary aerosol formation. The contribution of non-fossil sources increased with increasing haze pollution, suggesting BB may be an important driver of haze events in winter.
Gregory P. Schill, Karl D. Froyd, Daniel M. Murphy, Christina J. Williamson, Charles A. Brock, Tomás Sherwen, Mat J. Evans, Eric A. Ray, Eric C. Apel, Rebecca S. Hornbrook, Alan J. Hills, Jeff Peischl, Thomas B. Ryerson, Chelsea R. Thompson, Ilann Bourgeois, Donald R. Blake, Joshua P. DiGangi, and Glenn S. Diskin
Atmos. Chem. Phys., 25, 45–71, https://doi.org/10.5194/acp-25-45-2025, https://doi.org/10.5194/acp-25-45-2025, 2025
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Using single-particle mass spectrometry, we show that trace concentrations of bromine and iodine are ubiquitous in remote tropospheric aerosol and suggest that aerosols are an important part of the global reactive iodine budget. Comparisons to a global climate model with detailed iodine chemistry are favorable in the background atmosphere; however, the model cannot replicate our measurements near the ocean surface, in biomass burning plumes, and in the stratosphere.
Yanqin Ren, Zhenhai Wu, Fang Bi, Hong Li, Haijie Zhang, Junling Li, Rui Gao, Fangyun Long, Zhengyang Liu, Yuanyuan Ji, and Gehui Wang
EGUsphere, https://doi.org/10.5194/egusphere-2024-3678, https://doi.org/10.5194/egusphere-2024-3678, 2025
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The daily concentrations of Polycyclic aromatic hydrocarbons (PAHs), oxygenated PAHs (OPAHs), and nitrated phenols (NPs) in PM2.5 were all increased during the heating season. Biomass burning was identified to be the primary source of these aromatic compounds, particularly for PAHs. Phenol and nitrobenzene are two main primary precursors for 4NP, with phenol showing lower reaction barriers. P-Cresol was identified as the primary precursor for the formation of 4-methyl-5-nitrocatechol.
Zhao Wei, Shohei Hattori, Asuka Tsuruta, Zhuang Jiang, Sakiko Ishino, Koji Fujita, Sumito Matoba, Lei Geng, Alexis Lamothe, Ryu Uemura, Naohiro Yoshida, Joel Savarino, and Yoshinori Iizuka
EGUsphere, https://doi.org/10.5194/egusphere-2024-3937, https://doi.org/10.5194/egusphere-2024-3937, 2024
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Nitrate isotope records in ice cores reveal changes in NOₓ emissions, atmospheric acidity, and oxidation chemistry driven by human activity. However, nitrate in snow can be altered by UV-driven post-depositional processes, making snow accumulation rates critical for preserving these records. This study examines nitrate isotopes in an SE-Dome ice core, where high snow accumulation minimizes these effects, providing a reliable archive of atmospheric nitrogen cycling.
Capucine Camin, François Lacan, Catherine Pradoux, Marie Labatut, Anne Johansen, and James W. Murray
EGUsphere, https://doi.org/10.5194/egusphere-2024-3777, https://doi.org/10.5194/egusphere-2024-3777, 2024
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This manuscript presents the chemical composition of aerosols (> 1µm) over the Equatorial and Tropical Pacific Ocean, presenting the first measurements of iron isotopes in aerosols from this region. Iron concentrations and isotopes were determined using a Neptune MC-ICPMS. Our data analysis reveals that a significant portion of the aerosols undergo dissolution and removal during atmospheric transport. These findings contribute to original conclusions about the chemistry and physics of aerosols.
Andreas Aktypis, Dontavious J. Sippial, Christina N. Vasilakopoulou, Angeliki Matrali, Christos Kaltsonoudis, Andrea Simonati, Marco Paglione, Matteo Rinaldi, Stefano Decesari, and Spyros N. Pandis
Atmos. Chem. Phys., 24, 13769–13791, https://doi.org/10.5194/acp-24-13769-2024, https://doi.org/10.5194/acp-24-13769-2024, 2024
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A dual-chamber system was deployed in two different environments (Po Valley, Italy, and Pertouli forest, Greece) to study the potential of ambient air directly injected into the chambers, to form secondary organic aerosol (SOA). In the Po Valley, the system reacts rapidly, forming large amounts of SOA, while in Pertouli the SOA formation chemistry appears to have been practically terminated before the beginning of most experiments, so there is little additional SOA formation potential left.
Fredrik Mattsson, Almuth Neuberger, Liine Heikkinen, Yvette Gramlich, Marco Paglione, Matteo Rinaldi, Stefano Decesari, Paul Zieger, Ilona Riipinen, and Claudia Mohr
EGUsphere, https://doi.org/10.5194/egusphere-2024-3629, https://doi.org/10.5194/egusphere-2024-3629, 2024
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This study investigated aerosol-cloud interactions, focusing on organic nitrogen (ON) formation in the aqueous phase. Measurements were conducted in wintertime Italian Po Valley, using aerosol mass spectrometry. The fog was enriched in more hygroscopic inorganic compounds and ON, containing e.g. imidazoles. The formation of imidazole by aerosol-fog interactions could be confirmed for the first time in atmospheric observations. Findings highlight the role of fog in nitrogen aerosol formation.
Jie Zhang, Tianyu Zhu, Alexandra Catena, Yaowei Li, Margaret J. Schwab, Pengfei Liu, Akua Asa-Awuku, and James Schwab
Atmos. Chem. Phys., 24, 13445–13456, https://doi.org/10.5194/acp-24-13445-2024, https://doi.org/10.5194/acp-24-13445-2024, 2024
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This study shows the derived organic aerosol hygroscopicity under high-humidity conditions based on a simple optical scatter monitor system, including two nephelometric monitors (pDR-1500), when the aerosol chemical composition is already known.
Wei Yuan, Ru-Jin Huang, Chao Luo, Lu Yang, Wenjuan Cao, Jie Guo, and Huinan Yang
Atmos. Chem. Phys., 24, 13219–13230, https://doi.org/10.5194/acp-24-13219-2024, https://doi.org/10.5194/acp-24-13219-2024, 2024
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We characterized water-soluble oxidative potential (OP) levels in wintertime PM2.5 in the south and north of Beijing. Our results show that the volume-normalized dithiothreitol (DTTv) in the north was comparable to that in the south, while the mass-normalized dithiothreitol (DTTm) in the north was almost twice that in the south. Traffic-related emissions and biomass burning were the main sources of DTTv in the south, and traffic-related emissions contributed the most to DTTv in the north.
Mingfu Cai, Chenshuo Ye, Bin Yuan, Shan Huang, E Zheng, Suxia Yang, Zelong Wang, Yi Lin, Tiange Li, Weiwei Hu, Wei Chen, Qicong Song, Wei Li, Yuwen Peng, Baoling Liang, Qibin Sun, Jun Zhao, Duohong Chen, Jiaren Sun, Zhiyong Yang, and Min Shao
Atmos. Chem. Phys., 24, 13065–13079, https://doi.org/10.5194/acp-24-13065-2024, https://doi.org/10.5194/acp-24-13065-2024, 2024
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This study investigated the daytime secondary organic aerosol (SOA) formation in urban plumes. We observed a significant daytime SOA formation through gas–particle partitioning when the site was affected by urban plumes. A box model simulation indicated that urban pollutants (nitrogen oxide and volatile organic compounds) could enhance the oxidizing capacity, while the elevated volatile organic compounds were mainly responsible for promoting daytime SOA formation.
Qingxiao Meng, Yunjiang Zhang, Sheng Zhong, Jie Fang, Lili Tang, Yongcai Rao, Minfeng Zhou, Jian Qiu, Xiaofeng Xu, Jean-Eudes Petit, Olivier Favez, and Xinlei Ge
EGUsphere, https://doi.org/10.5194/egusphere-2024-2776, https://doi.org/10.5194/egusphere-2024-2776, 2024
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We developed a new method to reconstruct missing elemental carbon (EC) data in four Chinese cities from 2013 to 2023. Using machine learning, we accurately filled data gaps and introduced a new approach to analyze EC trends. Our findings reveal a significant decline in EC due to stricter pollution controls, though this slowed after 2020. This study provides a versatile framework for addressing data gaps and supports strategies to reduce urban air pollution and its climate impacts.
Yingjie Shen, Rudra P. Pokhrel, Amy P. Sullivan, Ezra J. T. Levin, Lauren A. Garofalo, Delphine K. Farmer, Wade Permar, Lu Hu, Darin W. Toohey, Teresa Campos, Emily V. Fischer, and Shane M. Murphy
Atmos. Chem. Phys., 24, 12881–12901, https://doi.org/10.5194/acp-24-12881-2024, https://doi.org/10.5194/acp-24-12881-2024, 2024
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The magnitude and evolution of brown carbon (BrC) absorption remain unclear, with uncertainty in climate models. Data from the WE-CAN airborne experiment show that model parameterizations overestimate the mass absorption cross section (MAC) of BrC. Observed decreases in BrC absorption with chemical markers are due to decreasing organic aerosol (OA) mass rather than a decreasing BrC MAC, which is currently implemented in models. Water-soluble BrC contributes 23 % of total absorption at 660 nm.
Qun He, Zhaowen Wang, Houfeng Liu, Pengju Xu, Rongbao Duan, Caihong Xu, Jianmin Chen, and Min Wei
Atmos. Chem. Phys., 24, 12775–12792, https://doi.org/10.5194/acp-24-12775-2024, https://doi.org/10.5194/acp-24-12775-2024, 2024
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Coastal environments provide an ideal setting for investigating the intermixing of terrestrial and marine aerosols. Terrestrial air mass constituted a larger number of microbes from anthropogenic and soil emissions, whereas saprophytic and gut microbes were predominant in marine samples. Mixed air masses indicated a fusion of marine and terrestrial aerosols, characterized by alterations in the ratio of pathogenic and saprophytic microbes when compared to either terrestrial or marine samples.
Rime El Asmar, Zongrun Li, David J. Tanner, Yongtao Hu, Susan O'Neill, L. Gregory Huey, M. Talat Odman, and Rodney J. Weber
Atmos. Chem. Phys., 24, 12749–12773, https://doi.org/10.5194/acp-24-12749-2024, https://doi.org/10.5194/acp-24-12749-2024, 2024
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Prescribed burning is an important method for managing ecosystems and preventing wildfires. However, smoke from prescribed fires can have a significant impact on air quality. Here, using a network of fixed sites and sampling throughout an extended prescribed burning period in 2 different years, we characterize emissions and evolutions of up to 8 h of PM2.5 mass, black carbon (BC), and brown carbon (BrC) in smoke from burning of forested lands in the southeastern USA.
Matthew Boyer, Diego Aliaga, Lauriane L. J. Quéléver, Silvia Bucci, Hélène Angot, Lubna Dada, Benjamin Heutte, Lisa Beck, Marina Duetsch, Andreas Stohl, Ivo Beck, Tiia Laurila, Nina Sarnela, Roseline C. Thakur, Branka Miljevic, Markku Kulmala, Tuukka Petäjä, Mikko Sipilä, Julia Schmale, and Tuija Jokinen
Atmos. Chem. Phys., 24, 12595–12621, https://doi.org/10.5194/acp-24-12595-2024, https://doi.org/10.5194/acp-24-12595-2024, 2024
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We analyze the seasonal cycle and sources of gases that are relevant for the formation of aerosol particles in the central Arctic. Since theses gases can form new particles, they can influence Arctic climate. We show that the sources of these gases are associated with changes in the Arctic environment during the year, especially with respect to sea ice. Therefore, the concentration of these gases will likely change in the future as the Arctic continues to warm.
Binyu Xiao, Fan Zhang, Zeyu Liu, Yan Zhang, Rui Li, Can Wu, Xinyi Wan, Yi Wang, Yubao Chen, Yong Han, Min Cui, Libo Zhang, Yingjun Chen, and Gehui Wang
EGUsphere, https://doi.org/10.5194/egusphere-2024-3433, https://doi.org/10.5194/egusphere-2024-3433, 2024
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Intermediate/semi-volatile organic compounds in both gas and particle phases from ship exhausts are enhanced due to the switch of fuels from low-sulfur to ultra-low-sulfur. The findings indicate that optimization is necessary for the forthcoming global implementation of an ultra-low-sulfur oil policy. Besides, we find that organic diagnostic markers of hopanes, in conjunction with the ratio of octadecanoic to tetradecanoic could be considered as potential tracers for HFO exhausts.
Mutian Ma, Laura-Hélèna Rivellini, Yichen Zong, Markus Kraft, Liya E. Yu, and Alex King Yin Lee
EGUsphere, https://doi.org/10.5194/egusphere-2024-3240, https://doi.org/10.5194/egusphere-2024-3240, 2024
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This work advances our understanding of emission and atmospheric evolution of black carbon (BC) particles in Singapore, a complex urban environment impacted by multiple local and regional combustion sources, based on the improved source apportionment analysis of real-time aerosol mass spectrometry measurement.
Hongyu Zhang, Shenbo Wang, Zhangsen Dong, Xiao Li, and Ruiqin Zhang
EGUsphere, https://doi.org/10.5194/egusphere-2024-2869, https://doi.org/10.5194/egusphere-2024-2869, 2024
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To address this, 12-year observational data in Zhengzhou were investigated and revealed that the resuspension of surrounding soil dust determined the rebound of crustal material concentrations after 2019, further elevating the particle pH. Therefore, the future ammonia reduction policies in North China may not lead to a rapid increase in particle acidity buffering by the crustal materials, but it is necessary to consider synergistic control with dust sources.
Haley M. Royer, Michael T. Sheridan, Hope E. Elliott, Nurun Nahar Lata, Zezhen Cheng, Swarup China, Zihua Zhu, Andrew P. Ault, and Cassandra J. Gaston
EGUsphere, https://doi.org/10.5194/egusphere-2024-3288, https://doi.org/10.5194/egusphere-2024-3288, 2024
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Saharan dust transported across the Atlantic to the Caribbean, South America, and North America is hypothesized to undergo chemical processing by inorganic and organic acids that enhances cloud droplet formation, nutrient availability, and reflectivity of. In this study, chemical analysis performed on African dust deposited over Barbados shows that acid tracers are found mostly on sea salt and smoke particles, rather than dust, indicating that dust particles undergo minimal chemical processing.
Imad El Haddad, Danielle Vienneau, Kaspar R. Daellenbach, Robin Modini, Jay G. Slowik, Abhishek Upadhyay, Petros N. Vasilakos, David Bell, Kees de Hoogh, and Andre S. H. Prevot
Atmos. Chem. Phys., 24, 11981–12011, https://doi.org/10.5194/acp-24-11981-2024, https://doi.org/10.5194/acp-24-11981-2024, 2024
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This opinion paper explores how advances in aerosol science inform our understanding of the health impacts of outdoor particulate pollution. We advocate for a shift in the way we target PM pollution, focusing on the most harmful anthropogenic emissions. We highlight key observations, modelling developments, and emission measurements needed to achieve this shift.
Yu Huang, Xingru Li, Dan Dan Huang, Ruoyuan Lei, Binhuang Zhou, Yunjiang Zhang, and Xinlei Ge
EGUsphere, https://doi.org/10.5194/egusphere-2024-2757, https://doi.org/10.5194/egusphere-2024-2757, 2024
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This work performed a comprehensive investigation on the chemical and optical properties of the brown carbon in PM2.5 samples collected in Nanjing, China. In particular, we used the machine learning approach to identify a list of key BrC species, which can be a good reference for future studies. Our findings extend the understanding on BrC properties and are valuable to the assessment of its impact on air quality and radiative forcing.
Pramod Kumar, Khushboo Sharma, Ankita Malu, Rajeev Rajak, Aparna Gupta, Bidyutjyoti Baruah, Shailesh Yadav, Thupstan Angchuk, Jayant Sharma, Rakesh Kumar Ranjan, Anil Kumar Misra, and Nishchal Wanjari
Atmos. Chem. Phys., 24, 11585–11601, https://doi.org/10.5194/acp-24-11585-2024, https://doi.org/10.5194/acp-24-11585-2024, 2024
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This work monitors and assesses air pollution, especially black and brown carbon, its controlling factor, and its effect on the environment of Sikkim Himalayan region. The huge urban sprawl in recent decades has led to regional human-induced air pollution in the region. Black carbon was highest in April 2021 and March 2022, exceeding the WHO limit. The monsoon season causes huge rainfall over the region, which reduces the pollutants by scavenging (rainout and washout).
Maria P. Velásquez-García, K. Santiago Hernández, James A. Vergara-Correa, Richard J. Pope, Miriam Gómez-Marín, and Angela M. Rendón
Atmos. Chem. Phys., 24, 11497–11520, https://doi.org/10.5194/acp-24-11497-2024, https://doi.org/10.5194/acp-24-11497-2024, 2024
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In the Aburrá Valley, northern South America, local emissions determine air quality conditions. However, we found that external sources, such as regional fires, Saharan dust, and volcanic emissions, increase particulate concentrations and worsen chemical composition by introducing elements like heavy metals. Dry winds and source variability contribute to seasonal influences on these events. This study assesses the air quality risks posed by such events, which can affect broad regions worldwide.
Meng Wang, Qiyuan Wang, Steven Sai Hang Ho, Jie Tian, Yong Zhang, Shun-cheng Lee, and Junji Cao
Atmos. Chem. Phys., 24, 11175–11189, https://doi.org/10.5194/acp-24-11175-2024, https://doi.org/10.5194/acp-24-11175-2024, 2024
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We studied nitrogen-containing organic compounds (NOCs) in particulate matter <2.5 µm particles on the southeastern Tibetan Plateau. We found that biomass burning and transboundary transport are the main sources of NOCs in the high-altitude area. Understanding these aerosol sources informs how they add to regional and potentially global climate changes. Our findings could help shape effective environmental policies to enhance air quality and address climate impacts in this sensitive region.
Jinbo Wang, Jiaping Wang, Yuxuan Zhang, Tengyu Liu, Xuguang Chi, Xin Huang, Dafeng Ge, Shiyi Lai, Caijun Zhu, Lei Wang, Qiaozhi Zha, Ximeng Qi, Wei Nie, Congbin Fu, and Aijun Ding
Atmos. Chem. Phys., 24, 11063–11080, https://doi.org/10.5194/acp-24-11063-2024, https://doi.org/10.5194/acp-24-11063-2024, 2024
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In this study, we found large spatial discrepancies in the physical and chemical properties of black carbon over the Tibetan Plateau (TP). Elevated anthropogenic emissions from low-altitude regions can significantly change the mass concentration, mixing state and chemical composition of black-carbon-containing aerosol in the TP region, further altering its light absorption ability. Our study emphasizes the vulnerability of remote plateau regions to intense anthropogenic influences.
Liyuan Zhou, Qianyun Liu, Christian M. Salvador, Michael Le Breton, Mattias Hallquist, Jian Zhen Yu, Chak K. Chan, and Åsa M. Hallquist
Atmos. Chem. Phys., 24, 11045–11061, https://doi.org/10.5194/acp-24-11045-2024, https://doi.org/10.5194/acp-24-11045-2024, 2024
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Our research on city bus emissions reveals that alternative fuels (compressed natural gas and biofuels) reduce fresh particle emissions compared to diesel. However, all fuels lead to secondary air pollution. Aiming at guiding better environmental policies, we studied 76 buses using advanced emission measurement techniques. This work sheds light on the complex effects of bus fuels on urban air quality, emphasizing the need for comprehensive evaluations of future transportation technologies.
Cited articles
Aggarwal, S. G. and Kawamura, K.: Molecular distributions and stable carbon
isotopic compositions of dicarboxylic acids and related compounds in
aerosols from Sapporo, Japan: Implications for photochemical aging during
long-range atmospheric transport, J. Geophys. Res.-Atmos., 113,
D14301, https://doi.org/10.1029/2007jd009365, 2008.
Agrawal, H., Malloy, Q. G. J., Welch, W. A., Wayne Miller, J., and Cocker,
D. R.: In-use gaseous and particulate matter emissions from a modern ocean
going container vessel, Atmos. Environ., 42, 5504–5510,
https://doi.org/10.1016/j.atmosenv.2008.02.053, 2008.
Akagi, S. K., Craven, J. S., Taylor, J. W., McMeeking, G. R., Yokelson, R. J., Burling, I. R., Urbanski, S. P., Wold, C. E., Seinfeld, J. H., Coe, H., Alvarado, M. J., and Weise, D. R.: Evolution of trace gases and particles emitted by a chaparral fire in California, Atmos. Chem. Phys., 12, 1397–1421, https://doi.org/10.5194/acp-12-1397-2012, 2012.
Alas, H. D., Müller, T., Birmili, W., Kecorius, S., Cambaliza, M. O.,
Simpas, J. B. B., Cayetano, M., Weinhold, K., Vallar, E., Galvez, M. C., and
Wiedensohler, A.: Spatial Characterization of Black Carbon Mass
Concentration in the Atmosphere of a Southeast Asian Megacity: An Air
Quality Case Study for Metro Manila, Philippines, Aerosol Air Qual. Res.,
18, 2301–2317, https://doi.org/10.4209/aaqr.2017.08.0281, 2018.
Allen, A. G., Nemitz, E., Shi, J. P., Harrison, R. M., and Greenwood, J. C.:
Size distributions of trace metals in atmospheric aerosols in the United
Kingdom, Atmos. Environ., 35, 4581–4591,
https://doi.org/10.1016/S1352-2310(01)00190-X, 2001.
Amato, F., Pandolfi, M., Viana, M., Querol, X., Alastuey, A., and Moreno,
T.: Spatial and chemical patterns of PM10 in road dust deposited in urban
environment, Atmos. Environ., 43, 1650–1659,
https://doi.org/10.1016/j.atmosenv.2008.12.009, 2009.
Andreae, M. O.: Soot Carbon and Excess Fine Potassium: Long-Range Transport
of Combustion-Derived Aerosols, Science, 220, 1148,
10.1126/science.220.4602.1148, 1983.
Arimoto, R., Duce, R. A., Ray, B. J., Ellis Jr., W. G., Cullen, J. D., and
Merrill, J. T.: Trace elements in the atmosphere over the North Atlantic, J.
Geophys. Res.-Atmos., 100, 1199–1213, https://doi.org/10.1029/94jd02618, 1995.
Artaxo, P., Gerab, F., Yamasoe, M. A., and Martins, J. V.: Fine mode aerosol
composition at three long-term atmospheric monitoring sites in the Amazon
Basin, J. Geophys. Res.-Atmos., 99, 22857–22868, https://doi.org/10.1029/94jd01023, 1994.
Artaxo, P., Oyola, P., and Martinez, R.: Aerosol composition and source
apportionment in Santiago de Chile, Nucl. Instrum. Meth. B, 150, 409–416,
https://doi.org/10.1016/S0168-583X(98)01078-7, 1999.
Atwood, S. A., Reid, J. S., Kreidenweis, S. M., Cliff, S. S., Zhao, Y., Lin,
N.-H., Tsay, S.-C., Chu, Y.-C., and Westphal, D. L.: Size resolved
measurements of springtime aerosol particles over the northern South China
Sea, Atmos. Environ., 78, 134–143,
https://doi.org/10.1016/j.atmosenv.2012.11.024, 2013.
Atwood, S. A., Reid, J. S., Kreidenweis, S. M., Blake, D. R., Jonsson, H. H., Lagrosas, N. D., Xian, P., Reid, E. A., Sessions, W. R., and Simpas, J. B.: Size-resolved aerosol and cloud condensation nuclei (CCN) properties in the remote marine South China Sea – Part 1: Observations and source classification, Atmos. Chem. Phys., 17, 1105–1123, https://doi.org/10.5194/acp-17-1105-2017, 2017.
AzadiAghdam, M., Braun, R. A., Edwards, E.-L., Bañaga, P. A., Cruz, M.
T., Betito, G., Cambaliza, M. O., Dadashazar, H., Lorenzo, G. R., Ma, L.,
MacDonald, A. B., Nguyen, P., Simpas, J. B., Stahl, C., and Sorooshian, A.:
On the nature of sea salt aerosol at a coastal megacity: Insights from
Manila, Philippines in Southeast Asia, Atmos. Environ., 216, 116922,
https://doi.org/10.1016/j.atmosenv.2019.116922, 2019.
Bagtasa, G.: Effect of Synoptic Scale Weather Disturbance to Philippine
Transboundary Oxone Pollution using WRF-CHEM, Int. J. Environ. Sci. Dev., 2,
402–405, https://doi.org/10.7763/IJESD.2011.V2.159, 2011.
Bagtasa, G., Cayetano, M. G., and Yuan, C.-S.: Seasonal variation and chemical characterization of PM2.5 in northwestern Philippines, Atmos. Chem. Phys., 18, 4965–4980, https://doi.org/10.5194/acp-18-4965-2018, 2018.
Balla, D., Voutsa, D., and Samara, C.: Study of polar organic compounds in
airborne particulate matter of a coastal urban city, Environ. Sci. Pollut.
R., 25, 12191–12205, https://doi.org/10.1007/s11356-017-9993-2, 2018.
Bautista, A. T., Pabroa, P. C. B., Santos, F. L., Racho, J. M. D., and
Quirit, L. L.: Carbonaceous particulate matter characterization in an urban
and a rural site in the Philippines, Atmos. Pollut. Res., 5, 245–252,
https://doi.org/10.5094/APR.2014.030, 2014.
Bovallius, A., Bucht, B., Roffey, R., and Anäs, P.: Long-range air
transmission of bacteria, Appl. Environ. Microb., 35, 1231–1231, 1978.
Braun, R. A., Dadashazar, H., MacDonald, A. B., Aldhaif, A. M., Maudlin, L.
C., Crosbie, E., Aghdam, M. A., Hossein Mardi, A., and Sorooshian, A.:
Impact of Wildfire Emissions on Chloride and Bromide Depletion in Marine
Aerosol Particles, Environ. Sci. Technol., 51, 9013–9021,
https://doi.org/10.1021/acs.est.7b02039, 2017.
Brito, J., Freney, E., Dominutti, P., Borbon, A., Haslett, S. L., Batenburg, A. M., Colomb, A., Dupuy, R., Denjean, C., Burnet, F., Bourriane, T., Deroubaix, A., Sellegri, K., Borrmann, S., Coe, H., Flamant, C., Knippertz, P., and Schwarzenboeck, A.: Assessing the role of anthropogenic and biogenic sources on PM1 over southern West Africa using aircraft measurements, Atmos. Chem. Phys., 18, 757–772, https://doi.org/10.5194/acp-18-757-2018, 2018.
Campbell, J. R., Reid, J. S., Westphal, D. L., Zhang, J., Tackett, J. L.,
Chew, B. N., Welton, E. J., Shimizu, A., Sugimoto, N., Aoki, K., and Winker,
D. M.: Characterizing the vertical profile of aerosol particle extinction
and linear depolarization over Southeast Asia and the Maritime Continent:
The 2007–2009 view from CALIOP, Atmos. Res., 122, 520–543,
https://doi.org/10.1016/j.atmosres.2012.05.007, 2013.
Cao, F., Zhang, S.-C., Kawamura, K., Liu, X., Yang, C., Xu, Z., Fan, M.,
Zhang, W., Bao, M., Chang, Y., Song, W., Liu, S., Lee, X., Li, J., Zhang,
G., and Zhang, Y.-L.: Chemical characteristics of dicarboxylic acids and
related organic compounds in PM2.5 during biomass-burning and
non-biomass-burning seasons at a rural site of Northeast China, Environ.
Pollut., 231, 654–662, https://doi.org/10.1016/j.envpol.2017.08.045, 2017.
Cayanan, E. O., Chen, T.-C., Argete, J. C., Yen, M.-C., and Nilo, P. D.: The
Effect of Tropical Cyclones on Southwest Monsoon Rainfall in the
Philippines, J. Meteorol. Soc. Jpn., 89A, 123–139,
https://doi.org/10.2151/jmsj.2011-A08, 2011.
Chang, L. T.-C., Tsai, J.-H., Lin, J.-M., Huang, Y.-S., and Chiang, H.-L.:
Particulate matter and gaseous pollutants during a tropical storm and air
pollution episode in Southern Taiwan, Atmos. Res., 99, 67–79,
https://doi.org/10.1016/j.atmosres.2010.09.002, 2011.
Cheng, C., Li, M., Chan, C. K., Tong, H., Chen, C., Chen, D., Wu, D., Li, L., Wu, C., Cheng, P., Gao, W., Huang, Z., Li, X., Zhang, Z., Fu, Z., Bi, Y., and Zhou, Z.: Mixing state of oxalic acid containing particles in the rural area of Pearl River Delta, China: implications for the formation mechanism of oxalic acid, Atmos. Chem. Phys., 17, 9519–9533, https://doi.org/10.5194/acp-17-9519-2017, 2017.
Chow, J. C., Watson, J. G., Kuhns, H., Etyemezian, V., Lowenthal, D. H.,
Crow, D., Kohl, S. D., Engelbrecht, J. P., and Green, M. C.: Source profiles
for industrial, mobile, and area sources in the Big Bend Regional Aerosol
Visibility and Observational study, Chemosphere, 54, 185–208,
https://doi.org/10.1016/j.chemosphere.2003.07.004, 2004.
Chuang, M.-T., Chang, S.-C., Lin, N.-H., Wang, J.-L., Sheu, G.-R., Chang,
Y.-J., and Lee, C.-T.: Aerosol chemical properties and related pollutants
measured in Dongsha Island in the northern South China Sea during
7-SEAS/Dongsha Experiment, Atmos. Environ., 78, 82–92,
https://doi.org/10.1016/j.atmosenv.2012.05.014, 2013.
Crahan, K. K., Hegg, D., Covert, D. S., and Jonsson, H.: An exploration of
aqueous oxalic acid production in the coastal marine atmosphere, Atmos.
Environ., 38, 3757–3764, https://doi.org/10.1016/j.atmosenv.2004.04.009,
2004.
Cruz, F. T., Narisma, G. T., Villafuerte, M. Q., Cheng Chua, K. U., and
Olaguera, L. M.: A climatological analysis of the southwest monsoon rainfall
in the Philippines, Atmos. Res., 122, 609–616,
https://doi.org/10.1016/j.atmosres.2012.06.010, 2013.
Cruz, M. T., Bañaga, P. A., Betito, G., Braun, R. A., Stahl, C., Aghdam, M. A., Cambaliza, M. O., Dadashazar, H., Hilario, M. R., Lorenzo, G. R., Ma, L., MacDonald, A. B., Pabroa, P. C., Yee, J. R., Simpas, J. B., and Sorooshian, A.: Size-resolved composition and morphology of particulate matter during the southwest monsoon in Metro Manila, Philippines, Atmos. Chem. Phys., 19, 10675–10696, https://doi.org/10.5194/acp-19-10675-2019, 2019.
Dave, P., Bhushan, M., and Venkataraman, C.: Aerosols cause intraseasonal
short-term suppression of Indian monsoon rainfall, Sci. Rep.-UK, 7, 17347,
https://doi.org/10.1038/s41598-017-17599-1, 2017.
Deshmukh, D. K., Deb, M. K., Hopke, P. K., and Tsai, Y. I.: Seasonal
Characteristics of Water-Soluble Dicarboxylates Associated with PM10 in the
Urban Atmosphere of Durg City, India, Aerosol Air Qual. Res., 12, 683–696,
https://doi.org/10.4209/aaqr.2012.02.0040, 2012.
Deshmukh, D. K., Mozammel Haque, M., Kawamura, K., and Kim, Y.: Dicarboxylic
acids, oxocarboxylic acids and α-dicarbonyls in fine aerosols over
central Alaska: Implications for sources and atmospheric processes, Atmos.
Res., 202, 128–139, https://doi.org/10.1016/j.atmosres.2017.11.003, 2018.
Duce, R. A., Liss, P. S., Merrill, J. T., Atlas, E. L., Buat-Menard, P.,
Hicks, B. B., Miller, J. M., Prospero, J. M., Arimoto, R., Church, T. M.,
Ellis, W., Galloway, J. N., Hansen, L., Jickells, T. D., Knap, A. H.,
Reinhardt, K. H., Schneider, B., Soudine, A., Tokos, J. J., Tsunogai, S.,
Wollast, R., and Zhou, M.: The atmospheric input of trace species to the
world ocean, Global Biogeochem. Cy., 5, 193–259, https://doi.org/10.1029/91gb01778, 1991.
Echalar, F., Gaudichet, A., Cachier, H., and Artaxo, P.: Aerosol emissions
by tropical forest and savanna biomass burning: Characteristic trace
elements and fluxes, Geophys. Res. Lett., 22, 3039–3042, https://doi.org/10.1029/95gl03170,
1995.
Ervens, B.: Modeling the Processing of Aerosol and Trace Gases in Clouds and
Fogs, Chem. Rev., 115, 4157–4198, https://doi.org/10.1021/cr5005887, 2015.
Ervens, B., Feingold, G., Frost, G. J., and Kreidenweis, S. M.: A modeling
study of aqueous production of dicarboxylic acids: 1. Chemical pathways and
speciated organic mass production, J. Geophys. Res.-Atmos., 109,
D15205, https://doi.org/10.1029/2003jd004387, 2004.
Ervens, B., Sorooshian, A., Aldhaif, A. M., Shingler, T., Crosbie, E., Ziemba, L., Campuzano-Jost, P., Jimenez, J. L., and Wisthaler, A.: Is there an aerosol signature of chemical cloud processing?, Atmos. Chem. Phys., 18, 16099–16119, https://doi.org/10.5194/acp-18-16099-2018, 2018.
Falkovich, A. H., Graber, E. R., Schkolnik, G., Rudich, Y., Maenhaut, W., and Artaxo, P.: Low molecular weight organic acids in aerosol particles from Rondônia, Brazil, during the biomass-burning, transition and wet periods, Atmos. Chem. Phys., 5, 781–797, https://doi.org/10.5194/acp-5-781-2005, 2005.
Fang, G.-C., Lin, S.-J., Chang, S.-Y., and Chou, C.-C. K.: Effect of typhoon
on atmospheric particulates in autumn in central Taiwan, Atmos. Environ.,
43, 6039–6048, https://doi.org/10.1016/j.atmosenv.2009.08.033, 2009.
Farren, N. J., Dunmore, R. E., Mead, M. I., Mohd Nadzir, M. S., Samah, A. A., Phang, S.-M., Bandy, B. J., Sturges, W. T., and Hamilton, J. F.: Chemical characterisation of water-soluble ions in atmospheric particulate matter on the east coast of Peninsular Malaysia, Atmos. Chem. Phys., 19, 1537–1553, https://doi.org/10.5194/acp-19-1537-2019, 2019.
Flannigan, M., Cantin, A. S., de Groot, W. J., Wotton, M., Newbery, A., and
Gowman, L. M.: Global wildland fire season severity in the 21st century,
Forest Ecol. Manag., 294, 54–61,
https://doi.org/10.1016/j.foreco.2012.10.022, 2013.
Flannigan, M. D., Krawchuk, M. A., de Groot, W. J., Wotton, B. M., and
Gowman, L. M.: Implications of changing climate for global wildland fire,
Int. J. Wildland Fire, 18, 483–507, https://doi.org/10.1071/WF08187, 2009.
Fujimori, T., Takigami, H., Agusa, T., Eguchi, A., Bekki, K., Yoshida, A.,
Terazono, A., and Ballesteros, F. C.: Impact of metals in surface matrices
from formal and informal electronic-waste recycling around Metro Manila, the
Philippines, and intra-Asian comparison, J. Hazard. Mater., 221–222,
139–146, https://doi.org/10.1016/j.jhazmat.2012.04.019, 2012.
Fung, Y. S. and Wong, L. W. Y.: Apportionment of air pollution sources by
receptor models in Hong Kong, Atmos. Environ., 29, 2041–2048,
https://doi.org/10.1016/1352-2310(94)00239-H, 1995.
Gadde, B., Bonnet, S., Menke, C., and Garivait, S.: Air pollutant emissions
from rice straw open field burning in India, Thailand and the Philippines,
Environ. Pollut., 157, 1554–1558,
https://doi.org/10.1016/j.envpol.2009.01.004, 2009.
Ge, C., Wang, J., Reid, J. S., Posselt, D. J., Xian, P., and Hyer, E.:
Mesoscale modeling of smoke transport from equatorial Southeast Asian
Maritime Continent to the Philippines: First comparison of ensemble analysis
with in situ observations, J. Geophys. Res.-Atmos., 122, 5380–5398,
https://doi.org/10.1002/2016JD026241, 2017.
Gelaro, R., McCarty, W., Suárez, M. J., Todling, R., Molod, A., Takacs,
L., Randles, C. A., Darmenov, A., Bosilovich, M. G., Reichle, R., Wargan,
K., Coy, L., Cullather, R., Draper, C., Akella, S., Buchard, V., Conaty, A.,
Silva, A. M. d., Gu, W., Kim, G.-K., Koster, R., Lucchesi, R., Merkova, D.,
Nielsen, J. E., Partyka, G., Pawson, S., Putman, W., Rienecker, M.,
Schubert, S. D., Sienkiewicz, M., and Zhao, B.: The Modern-Era Retrospective
Analysis for Research and Applications, Version 2 (MERRA-2), J. Climate, 30,
5419–5454, https://doi.org/10.1175/jcli-d-16-0758.1, 2017.
Global Modeling and Assimilation Office (GMAO): MERRA-2 inst3_3d_asm_Nv:
3d,3-Hourly,Instantaneous,Model-Level,Assimilation,Assimilated
Meteorological Fields V5.12.4, Goddard Earth Sciences Data and Information
Services Center (GES DISC), https://doi.org/10.5067/WWQSXQ8IVFW8, 2015a.
Global Modeling and Assimilation Office (GMAO): MERRA-2 tavg1_2d_rad_Nx:
2d,1-Hourly,Time-Averaged,Single-Level,Assimilation,Radiation Diagnostics
V5.12.4, Goddard Earth Sciences Data and Information Services Center (GES
DISC), https://doi.org/10.5067/Q9QMY5PBNV1T, 2015b.
Goldstein, A. H., Koven, C. D., Heald, C. L., and Fung, I. Y.: Biogenic
carbon and anthropogenic pollutants combine to form a cooling haze over the
southeastern United States, P. Natl. Acad. Sci. USA, 106, 8835–8840,
https://doi.org/10.1073/pnas.0904128106, 2009.
Graf, H.-F., Yang, J., and Wagner, T. M.: Aerosol effects on clouds and precipitation during the 1997 smoke episode in Indonesia, Atmos. Chem. Phys., 9, 743–756, https://doi.org/10.5194/acp-9-743-2009, 2009.
Ho, K. F., Lee, S. C., Cao, J. J., Kawamura, K., Watanabe, T., Cheng, Y.,
and Chow, J. C.: Dicarboxylic acids, ketocarboxylic acids and dicarbonyls in
the urban roadside area of Hong Kong, Atmos. Environ., 40, 3030–3040,
https://doi.org/10.1016/j.atmosenv.2005.11.069, 2006.
Hogan, T. F., Liu, M., Ridout, J. A., Peng, M. S., Whitcomb, T. R., Ruston,
B. C., Reynolds, C. A., Eckermann, S. D., Moskaitis, J. R., Baker, N. L.,
McCormack, J. P., Viner, K. C., McLay, J. G., Flatau, M. K., Xu, L., Chen,
C., and Chang, S. W.: The Navy Global Environmental Model, Oceanography, 27,
116–125, https://doi.org/10.5670/oceanog.2014.73, 2014.
Hong, Y., Hsu, K.-L., Sorooshian, S., and Gao, X.: Precipitation Estimation
from Remotely Sensed Imagery Using an Artificial Neural Network Cloud
Classification System, J. Appl. Meteorol., 43, 1834–1853, https://doi.org/10.1175/jam2173.1,
2004.
Hoque, M. M. M., Kawamura, K., and Uematsu, M.: Spatio-temporal
distributions of dicarboxylic acids, ω-oxocarboxylic acids, pyruvic
acid, α-dicarbonyls and fatty acids in the marine aerosols from the
North and South Pacific, Atmos. Res., 185, 158–168,
https://doi.org/10.1016/j.atmosres.2016.10.022, 2017.
Hsieh, L.-Y., Kuo, S.-C., Chen, C.-L., and Tsai, Y. I.: Origin of
low-molecular-weight dicarboxylic acids and their concentration and size
distribution variation in suburban aerosol, Atmos. Environ., 41, 6648–6661,
https://doi.org/10.1016/j.atmosenv.2007.04.014, 2007.
Hsieh, L.-Y., Chen, C.-L., Wan, M.-W., Tsai, C.-H., and Tsai, Y. I.:
Speciation and temporal characterization of dicarboxylic acids in PM2.5
during a PM episode and a period of non-episodic pollution, Atmos. Environ.,
42, 6836–6850, https://doi.org/10.1016/j.atmosenv.2008.05.021, 2008.
Hyder, M., Genberg, J., Sandahl, M., Swietlicki, E., and Jönsson, J.
Å.: Yearly trend of dicarboxylic acids in organic aerosols from south of
Sweden and source attribution, Atmos. Environ., 57, 197–204,
https://doi.org/10.1016/j.atmosenv.2012.04.027, 2012.
Jeong, C.-H., Wang, J. M., Hilker, N., Debosz, J., Sofowote, U., Su, Y.,
Noble, M., Healy, R. M., Munoz, T., Dabek-Zlotorzynska, E., Celo, V., White,
L., Audette, C., Herod, D., and Evans, G. J.: Temporal and spatial
variability of traffic-related PM2.5 sources: Comparison of exhaust and
non-exhaust emissions, Atmos. Environ., 198, 55–69,
https://doi.org/10.1016/j.atmosenv.2018.10.038, 2019.
Juneng, L., Latif, M. T., and Tangang, F.: Factors influencing the
variations of PM10 aerosol dust in Klang Valley, Malaysia during the summer,
Atmos. Environ., 45, 4370–4378,
https://doi.org/10.1016/j.atmosenv.2011.05.045, 2011.
Kawamura, K. and Ikushima, K.: Seasonal changes in the distribution of
dicarboxylic acids in the urban atmosphere, Environ. Sci. Technol., 27,
2227–2235, https://doi.org/10.1021/es00047a033, 1993.
Kawamura, K. and Kaplan, I. R.: Motor exhaust emissions as a primary source
for dicarboxylic acids in Los Angeles ambient air, Environ. Sci. Technol.,
21, 105–110, https://doi.org/10.1021/es00155a014, 1987.
Kawamura, K. and Sakaguchi, F.: Molecular distributions of water soluble
dicarboxylic acids in marine aerosols over the Pacific Ocean including
tropics, J. Geophys. Res.-Atmos., 104, 3501–3509, https://doi.org/10.1029/1998jd100041,
1999.
Kawamura, K., Kasukabe, H., and Barrie, L. A.: Source and reaction pathways
of dicarboxylic acids, ketoacids and dicarbonyls in arctic aerosols: One
year of observations, Atmos. Environ., 30, 1709–1722,
https://doi.org/10.1016/1352-2310(95)00395-9, 1996.
Kecorius, S., Madueño, L., Vallar, E., Alas, H., Betito, G., Birmili,
W., Cambaliza, M. O., Catipay, G., Gonzaga-Cayetano, M., Galvez, M. C.,
Lorenzo, G., Müller, T., Simpas, J. B., Tamayo, E. G., and Wiedensohler,
A.: Aerosol particle mixing state, refractory particle number size
distributions and emission factors in a polluted urban environment: Case
study of Metro Manila, Philippines, Atmos. Environ., 170, 169–183,
https://doi.org/10.1016/j.atmosenv.2017.09.037, 2017.
Kim, E. and Hopke, P. K.: Source characterization of ambient fine particles
at multiple sites in the Seattle area, Atmos. Environ., 42, 6047–6056,
https://doi.org/10.1016/j.atmosenv.2008.03.032, 2008.
Kim, J. Y., Ghim, Y. S., Song, C. H., Yoon, S.-C., and Han, J. S.: Seasonal
characteristics of air masses arriving at Gosan, Korea, using fine particle
measurements between November 2001 and August 2003, J. Geophys. Res.-Atmos.,
112, D07202, https://doi.org/10.1029/2005jd006946, 2007.
Kim Oanh, N. T., Upadhyay, N., Zhuang, Y. H., Hao, Z. P., Murthy, D. V. S.,
Lestari, P., Villarin, J. T., Chengchua, K., Co, H. X., Dung, N. T., and
Lindgren, E. S.: Particulate air pollution in six Asian cities: Spatial and
temporal distributions, and associated sources, Atmos. Environ., 40,
3367–3380, https://doi.org/10.1016/j.atmosenv.2006.01.050, 2006.
Kristiansen, N. I., Stohl, A., Olivié, D. J. L., Croft, B., Søvde, O. A., Klein, H., Christoudias, T., Kunkel, D., Leadbetter, S. J., Lee, Y. H., Zhang, K., Tsigaridis, K., Bergman, T., Evangeliou, N., Wang, H., Ma, P.-L., Easter, R. C., Rasch, P. J., Liu, X., Pitari, G., Di Genova, G., Zhao, S. Y., Balkanski, Y., Bauer, S. E., Faluvegi, G. S., Kokkola, H., Martin, R. V., Pierce, J. R., Schulz, M., Shindell, D., Tost, H., and Zhang, H.: Evaluation of observed and modelled aerosol lifetimes using radioactive tracers of opportunity and an ensemble of 19 global models, Atmos. Chem. Phys., 16, 3525–3561, https://doi.org/10.5194/acp-16-3525-2016, 2016.
Kumar, S., Aggarwal, S. G., Gupta, P. K., and Kawamura, K.: Investigation of
the tracers for plastic-enriched waste burning aerosols, Atmos. Environ.,
108, 49–58, https://doi.org/10.1016/j.atmosenv.2015.02.066, 2015.
Kunwar, B., Kawamura, K., Fujiwara, S., Fu, P., Miyazaki, Y., and Pokhrel,
A.: Dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in
atmospheric aerosols from Mt. Fuji, Japan: Implication for primary emission
versus secondary formation, Atmos. Res., 221, 58–71,
https://doi.org/10.1016/j.atmosres.2019.01.021, 2019.
Latif, M. T., Othman, M., Idris, N., Juneng, L., Abdullah, A. M., Hamzah, W.
P., Khan, M. F., Nik Sulaiman, N. M., Jewaratnam, J., Aghamohammadi, N.,
Sahani, M., Xiang, C. J., Ahamad, F., Amil, N., Darus, M., Varkkey, H.,
Tangang, F., and Jaafar, A. B.: Impact of regional haze towards air quality
in Malaysia: A review, Atmos. Environ., 177, 28–44,
https://doi.org/10.1016/j.atmosenv.2018.01.002, 2018.
Li, X.-d., Yang, Z., Fu, P., Yu, J., Lang, Y.-c., Liu, D., Ono, K., and
Kawamura, K.: High abundances of dicarboxylic acids, oxocarboxylic acids,
and α-dicarbonyls in fine aerosols (PM2.5) in Chengdu, China during
wintertime haze pollution, Environ. Sci. Pollut. R., 22, 12902–12918,
https://doi.org/10.1007/s11356-015-4548-x, 2015.
Lin, C.-C., Chen, S.-J., Huang, K.-L., Hwang, W.-I., Chang-Chien, G.-P., and
Lin, W.-Y.: Characteristics of Metals in Nano/Ultrafine/Fine/Coarse
Particles Collected Beside a Heavily Trafficked Road, Environ. Sci.
Technol., 39, 8113–8122, https://doi.org/10.1021/es048182a, 2005.
Lin, C.-Y., Hsu, H.-m., Lee, Y. H., Kuo, C. H., Sheng, Y.-F., and Chu, D. A.: A new transport mechanism of biomass burning from Indochina as identified by modeling studies, Atmos. Chem. Phys., 9, 7901–7911, https://doi.org/10.5194/acp-9-7901-2009, 2009.
Lin, I. I., Chen, J.-P., Wong, G. T. F., Huang, C.-W., and Lien, C.-C.:
Aerosol input to the South China Sea: Results from the MODerate Resolution
Imaging Spectro-radiometer, the Quick Scatterometer, and the Measurements of
Pollution in the Troposphere Sensor, Deep-Sea Res. Pt. II, 54, 1589–1601,
https://doi.org/10.1016/j.dsr2.2007.05.013, 2007.
Lindqvist, O., Johansson, K., Bringmark, L., Timm, B., Aastrup, M.,
Andersson, A., Hovsenius, G., Håkanson, L., Iverfeldt, Å., and
Meili, M.: Mercury in the Swedish environment – Recent research on causes,
consequences and corrective methods, Water Air Soil Pollut., 55, xi–xv,
https://doi.org/10.1007/bf00542429, 1991.
Liu, W., Han, Y., Yin, Y., Duan, J., Gong, J., Liu, Z., and Xu, W.: An
aerosol air pollution episode affected by binary typhoons in east and
central China, Atmos. Pollut. Res., 9, 634–642,
https://doi.org/10.1016/j.apr.2018.01.005, 2018.
Liu, Y., Cai, W., Sun, C., Song, H., Cobb, K. M., Li, J., Leavitt, S. W.,
Wu, L., Cai, Q., Liu, R., Ng, B., Cherubini, P., Büentgen, U., Song, Y.,
Wang, G., Lei, Y., Yan, L., Li, Q., Ma, Y., Fang, C., Sun, J., Li, X., Chen,
D., and Linderholm, H. W.: Anthropogenic aerosols cause recent pronounced
weakening of Asian Summer Monsoon relative to last four centuries, Geophys.
Res. Lett., 46, 5469–5479, https://doi.org/10.1029/2019gl082497, 2019.
Lu, C.-C., Yuan, C.-S., and Li, T.-C.: How Aeolian Dust Deteriorate Ambient
Particulate Air Quality along an Expansive River Valley in Southern Taiwan?
A Case Study of Typhoon Doksuri, Aerosol Air Qual. Res., 17, 2181–2196,
https://doi.org/10.4209/aaqr.2017.08.0257, 2017.
Lynch, P., Reid, J. S., Westphal, D. L., Zhang, J., Hogan, T. F., Hyer, E. J., Curtis, C. A., Hegg, D. A., Shi, Y., Campbell, J. R., Rubin, J. I., Sessions, W. R., Turk, F. J., and Walker, A. L.: An 11-year global gridded aerosol optical thickness reanalysis (v1.0) for atmospheric and climate sciences, Geosci. Model Dev., 9, 1489–1522, https://doi.org/10.5194/gmd-9-1489-2016, 2016.
Lyons, W. A., Dooley, J. C., and Whitby, K. T.: Satellite detection of
long-range pollution transport and sulfate aerosol hazes, Atmos. Environ., 12, 621–631, https://doi.org/10.1016/0004-6981(78)90242-1, 1978.
Ma, L., Dadashazar, H., Braun, R. A., MacDonald, A. B., Aghdam, M. A.,
Maudlin, L. C., and Sorooshian, A.: Size-resolved Characteristics of
Water-Soluble Particulate Elements in a Coastal Area: Source Identification,
Influence of Wildfires, and Diurnal Variability, Atmos. Environ.,
206, 72–84, https://doi.org/10.1016/j.atmosenv.2019.02.045, 2019.
Maenhaut, W., Salma, I., Cafmeyer, J., Annegarn, H. J., and Andreae, M. O.:
Regional atmospheric aerosol composition and sources in the eastern
Transvaal, South Africa, and impact of biomass burning, J. Geophys.
Res.-Atmos., 101, 23631–23650, https://doi.org/10.1029/95jd02930, 1996.
Maki, T., Lee, K. C., Kawai, K., Onishi, K., Hong, C. S., Kurosaki, Y.,
Shinoda, M., Kai, K., Iwasaka, Y., Archer, S. D. J., Lacap-Bugler, D. C.,
Hasegawa, H., and Pointing, S. B.: Aeolian dispersal of bacteria associated
with desert dust and anthropogenic particles over continental and oceanic
surfaces, J. Geophys. Res.-Atmos., 124, 5579–5588, https://doi.org/10.1029/2018jd029597, 2019.
Mamoudou, I., Zhang, F., Chen, Q., Wang, P., and Chen, Y.: Characteristics
of PM2.5 from ship emissions and their impacts on the ambient air: A case
study in Yangshan Harbor, Shanghai, Sci. Total Environ., 640–641, 207–216,
https://doi.org/10.1016/j.scitotenv.2018.05.261, 2018.
Marple, V., Olson, B., Romay, F., Hudak, G., Geerts, S. M., and Lundgren,
D.: Second Generation Micro-Orifice Uniform Deposit Impactor, 120 MOUDI-II:
Design, Evaluation, and Application to Long-Term Ambient Sampling, Aerosol
Sci. Tech., 48, 427–433, https://doi.org/10.1080/02786826.2014.884274, 2014.
Maudlin, L. C., Wang, Z., Jonsson, H. H., and Sorooshian, A.: Impact of
wildfires on size-resolved aerosol composition at a coastal California site,
Atmos. Environ., 119, 59–68, https://doi.org/10.1016/j.atmosenv.2015.08.039,
2015.
Mosher, B. W. and Duce, R. A.: A global atmospheric selenium budget, J.
Geophys. Res.-Atmos., 92, 13289–13298, https://doi.org/10.1029/JD092iD11p13289, 1987.
Nguyen, P., Sellars, S., Thorstensen, A., Tao, Y., Ashouri, H., Braithwaite,
D., Hsu, K., and Sorooshian, S.: Satellites Track Precipitation of Super
Typhoon Haiyan, Eos Trans. AGU, 95, 133–135, https://doi.org/10.1002/2014eo160002, 2014.
Nguyen, P., Shearer, E. J., Tran, H., Ombadi, M., Hayatbini, N., Palacios,
T., Huynh, P., Braithwaite, D., Updegraff, G., Hsu, K., Kuligowski, B.,
Logan, W. S., and Sorooshian, S.: The CHRS Data Portal, an easily accessible
public repository for PERSIANN global satellite precipitation data,
Scientific Data, 6, 180296, https://doi.org/10.1038/sdata.2018.296, 2019.
Nirmalkar, J., Deshmukh, D. K., Deb, M. K., Tsai, Y. I., and Sopajaree, K.:
Mass loading and episodic variation of molecular markers in PM2.5 aerosols
over a rural area in eastern central India, Atmos. Environ., 117, 41–50,
https://doi.org/10.1016/j.atmosenv.2015.07.003, 2015.
Nordø, J.: Long range transport of air pollutants in Europe and acid
precipitation in Norway, Water Air Soil Pollut., 6, 199–217,
https://doi.org/10.1007/bf00182865, 1976.
Pakkanen, T. A., Loukkola, K., Korhonen, C. H., Aurela, M., Mäkelä,
T., Hillamo, R. E., Aarnio, P., Koskentalo, T., Kousa, A., and Maenhaut, W.:
Sources and chemical composition of atmospheric fine and coarse particles in
the Helsinki area, Atmos. Environ., 35, 5381–5391,
https://doi.org/10.1016/S1352-2310(01)00307-7, 2001.
Pakkanen, T. A., Kerminen, V.-M., Loukkola, K., Hillamo, R. E., Aarnio, P.,
Koskentalo, T., and Maenhaut, W.: Size distributions of mass and chemical
components in street-level and rooftop PM1 particles in Helsinki, Atmos.
Environ., 37, 1673–1690, https://doi.org/10.1016/S1352-2310(03)00011-6,
2003.
Pandolfi, M., Gonzalez-Castanedo, Y., Alastuey, A., de la Rosa, J. D.,
Mantilla, E., de la Campa, A. S., Querol, X., Pey, J., Amato, F., and
Moreno, T.: Source apportionment of PM10 and PM2.5 at multiple sites in the
strait of Gibraltar by PMF: impact of shipping emissions, Environ. Sci.
Pollut. R., 18, 260–269, https://doi.org/10.1007/s11356-010-0373-4, 2011.
Philippine Statistics Authority: available at: https://psa.gov.ph/content/population-national-capital-region-based-2015-census-population-0, last access: 24 February 2020.
Querol, X., Alastuey, A., Moreno, T., Viana, M. M., Castillo, S., Pey, J.,
Rodríguez, S., Artiñano, B., Salvador, P., Sánchez, M., Garcia
Dos Santos, S., Herce Garraleta, M. D., Fernandez-Patier, R., Moreno-Grau,
S., Negral, L., Minguillón, M. C., Monfort, E., Sanz, M. J.,
Palomo-Marín, R., Pinilla-Gil, E., Cuevas, E., de la Rosa, J., and
Sánchez de la Campa, A.: Spatial and temporal variations in airborne
particulate matter (PM10 and PM2.5) across Spain 1999–2005, Atmos.
Environ., 42, 3964–3979, https://doi.org/10.1016/j.atmosenv.2006.10.071,
2008.
Ray, J. and McDow, S. R.: Dicarboxylic acid concentration trends and
sampling artifacts, Atmos. Environ., 39, 7906–7919,
https://doi.org/10.1016/j.atmosenv.2005.09.024, 2005.
Reid, J. S., Hyer, E. J., Prins, E. M., Westphal, D. L., Zhang, J., Wang,
J., Christopher, S. A., Curtis, C. A., Schmidt, C. C., Eleuterio, D. P.,
Richardson, K. A., and Hoffman, J. P.: Global Monitoring and Forecasting of
Biomass-Burning Smoke: Description of and Lessons From the Fire Locating and
Modeling of Burning Emissions (FLAMBE) Program, IEEE J. Sel. Top. Appl., 2,
144–162, https://doi.org/10.1109/jstars.2009.2027443, 2009.
Reid, J. S., Xian, P., Hyer, E. J., Flatau, M. K., Ramirez, E. M., Turk, F. J., Sampson, C. R., Zhang, C., Fukada, E. M., and Maloney, E. D.: Multi-scale meteorological conceptual analysis of observed active fire hotspot activity and smoke optical depth in the Maritime Continent, Atmos. Chem. Phys., 12, 2117–2147, https://doi.org/10.5194/acp-12-2117-2012, 2012.
Reid, J. S., Hyer, E. J., Johnson, R. S., Holben, B. N., Yokelson, R. J.,
Zhang, J., Campbell, J. R., Christopher, S. A., Di Girolamo, L., Giglio, L.,
Holz, R. E., Kearney, C., Miettinen, J., Reid, E. A., Turk, F. J., Wang, J.,
Xian, P., Zhao, G., Balasubramanian, R., Chew, B. N., Janjai, S., Lagrosas,
N., Lestari, P., Lin, N.-H., Mahmud, M., Nguyen, A. X., Norris, B., Oanh, N.
T. K., Oo, M., Salinas, S. V., Welton, E. J., and Liew, S. C.: Observing and
understanding the Southeast Asian aerosol system by remote sensing: An
initial review and analysis for the Seven Southeast Asian Studies (7SEAS)
program, Atmos. Res., 122, 403–468,
https://doi.org/10.1016/j.atmosres.2012.06.005, 2013.
Reid, J. S., Lagrosas, N. D., Jonsson, H. H., Reid, E. A., Sessions, W. R., Simpas, J. B., Uy, S. N., Boyd, T. J., Atwood, S. A., Blake, D. R., Campbell, J. R., Cliff, S. S., Holben, B. N., Holz, R. E., Hyer, E. J., Lynch, P., Meinardi, S., Posselt, D. J., Richardson, K. A., Salinas, S. V., Smirnov, A., Wang, Q., Yu, L., and Zhang, J.: Observations of the temporal variability in aerosol properties and their relationships to meteorology in the summer monsoonal South China Sea/East Sea: the scale-dependent role of monsoonal flows, the Madden–Julian Oscillation, tropical cyclones, squall lines and cold pools, Atmos. Chem. Phys., 15, 1745–1768, https://doi.org/10.5194/acp-15-1745-2015, 2015.
Reid, J. S., Xian, P., Holben, B. N., Hyer, E. J., Reid, E. A., Salinas, S. V., Zhang, J., Campbell, J. R., Chew, B. N., Holz, R. E., Kuciauskas, A. P., Lagrosas, N., Posselt, D. J., Sampson, C. R., Walker, A. L., Welton, E. J., and Zhang, C.: Aerosol meteorology of the Maritime Continent for the 2012 7SEAS southwest monsoon intensive study – Part 1: regional-scale phenomena, Atmos. Chem. Phys., 16, 14041–14056, https://doi.org/10.5194/acp-16-14041-2016, 2016a.
Reid, J. S., Lagrosas, N. D., Jonsson, H. H., Reid, E. A., Atwood, S. A., Boyd, T. J., Ghate, V. P., Xian, P., Posselt, D. J., Simpas, J. B., Uy, S. N., Zaiger, K., Blake, D. R., Bucholtz, A., Campbell, J. R., Chew, B. N., Cliff, S. S., Holben, B. N., Holz, R. E., Hyer, E. J., Kreidenweis, S. M., Kuciauskas, A. P., Lolli, S., Oo, M., Perry, K. D., Salinas, S. V., Sessions, W. R., Smirnov, A., Walker, A. L., Wang, Q., Yu, L., Zhang, J., and Zhao, Y.: Aerosol meteorology of Maritime Continent for the 2012 7SEAS southwest monsoon intensive study – Part 2: Philippine receptor observations of fine-scale aerosol behavior, Atmos. Chem. Phys., 16, 14057–14078, https://doi.org/10.5194/acp-16-14057-2016, 2016b.
Ross, A. D., Holz, R. E., Quinn, G., Reid, J. S., Xian, P., Turk, F. J., and Posselt, D. J.: Exploring the first aerosol indirect effect over Southeast Asia using a 10-year collocated MODIS, CALIOP, and model dataset, Atmos. Chem. Phys., 18, 12747–12764, https://doi.org/10.5194/acp-18-12747-2018, 2018.
Satsumabayashi, H., Kurita, H., Yokouchi, Y., and Ueda, H.: Photochemical
formation of particulate dicarboxylic acids under long-range transport in
central Japan, Atmos. Environ. A-Gen., 24, 1443–1450,
https://doi.org/10.1016/0960-1686(90)90053-P, 1990.
Schlosser, J. S., Braun, R. A., Bradley, T., Dadashazar, H., MacDonald, A.
B., Aldhaif, A. A., Aghdam, M. A., Mardi, A. H., Xian, P., and Sorooshian,
A.: Analysis of aerosol composition data for western United States wildfires
between 2005 and 2015: Dust emissions, chloride depletion, and most enhanced
aerosol constituents, J. Geophys. Res.-Atmos., 122, 8951–8966,
https://doi.org/10.1002/2017jd026547, 2017.
Simpas, J., Lorenzo, G., and Cruz, M. T.: Monitoring Particulate Matter
Levels and Composition for Source Apportionment Study in Metro Manila,
Philippines, in: Improving Air Quality in Asian Developing Countries:
Compilation of Research Findings, edited by: Kim Oanh, N. T., NARENCA,
Vietnam Publishing House of Natural Resources, Environment and Cartography,
Vietnam, 239–261, 2014.
Singh, M., Jaques, P. A., and Sioutas, C.: Size distribution and diurnal
characteristics of particle-bound metals in source and receptor sites of the
Los Angeles Basin, Atmos. Environ., 36, 1675–1689,
https://doi.org/10.1016/S1352-2310(02)00166-8, 2002.
Song, J., Zhao, Y., Zhang, Y., Fu, P., Zheng, L., Yuan, Q., Wang, S., Huang,
X., Xu, W., Cao, Z., Gromov, S., and Lai, S.: Influence of biomass burning
on atmospheric aerosols over the western South China Sea: Insights from
ions, carbonaceous fractions and stable carbon isotope ratios, Environ.
Pollut., 242, 1800–1809, https://doi.org/10.1016/j.envpol.2018.07.088, 2018.
Song, X.-H., Polissar, A. V., and Hopke, P. K.: Sources of fine particle
composition in the northeastern US, Atmos. Environ., 35, 5277–5286,
https://doi.org/10.1016/S1352-2310(01)00338-7, 2001.
Sorooshian, A., Varutbangkul, V., Brechtel, F. J., Ervens, B., Feingold, G.,
Bahreini, R., Murphy, S. M., Holloway, J. S., Atlas, E. L., Buzorius, G.,
Jonsson, H., Flagan, R. C., and Seinfeld, J. H.: Oxalic acid in clear and
cloudy atmospheres: Analysis of data from International Consortium for
Atmospheric Research on Transport and Transformation 2004, J. Geophys.
Res.-Atmos., 111, D23S45, https://doi.org/10.1029/2005jd006880, 2006.
Sorooshian, A., Ng, N. L., Chan, A. W. H., Feingold, G., Flagan, R. C., and
Seinfeld, J. H.: Particulate organic acids and overall water-soluble aerosol
composition measurements from the 2006 Gulf of Mexico Atmospheric
Composition and Climate Study (GoMACCS), J. Geophys. Res.-Atmos., 112,
D13201, https://doi.org/10.1029/2007jd008537, 2007a.
Sorooshian, A., Lu, M.-L., Brechtel, F. J., Jonsson, H., Feingold, G.,
Flagan, R. C., and Seinfeld, J. H.: On the Source of Organic Acid Aerosol
Layers above Clouds, Environ. Sci. Technol., 41, 4647–4654,
https://doi.org/10.1021/es0630442, 2007b.
Sorooshian, A., Crosbie, E., Maudlin, L. C., Youn, J.-S., Wang, Z.,
Shingler, T., Ortega, A. M., Hersey, S., and Woods, R. K.: Surface and
airborne measurements of organosulfur and methanesulfonate over the western
United States and coastal areas, J. Geophys. Res.-Atmos., 120, 8535–8548,
https://doi.org/10.1002/2015jd023822, 2015.
Stahl, C., Cruz, M. T., Bañaga, P. A., Betito, G., Braun, R. A., Aghdam, M. A., Cambaliza, M. O., Lorenzo, G. R., MacDonald, A. B., Pabroa, P. C., Yee, J. R., Simpas, J. B., and Sorooshian, A.: An Annual Time Series of Weekly Size-Resolved Aerosol Properties in the Megacity of Metro Manila, Philippines, figshare, https://doi.org/10.6084/m9.figshare.11861859, 2020.
Stein, A. F., Draxler, R. R., Rolph, G. D., Stunder, B. J. B., Cohen, M. D.,
and Ngan, F.: NOAA's HYSPLIT Atmospheric Transport and Dispersion Modeling
System, B. Am. Meteorol. Soc., 96, 2059–2077, https://doi.org/10.1175/bams-d-14-00110.1,
2015.
Sternbeck, J., Sjödin, Å., and Andréasson, K.: Metal emissions
from road traffic and the influence of resuspension–results from two
tunnel studies, Atmos. Environ., 36, 4735–4744,
https://doi.org/10.1016/S1352-2310(02)00561-7, 2002.
Thepnuan, D., Chantara, S., Lee, C.-T., Lin, N.-H., and Tsai, Y. I.:
Molecular markers for biomass burning associated with the characterization
of PM2.5 and component sources during dry season haze episodes in Upper
South East Asia, Sci. Total Environ., 658, 708–722,
https://doi.org/10.1016/j.scitotenv.2018.12.201, 2019.
Thurston, G. D. and Spengler, J. D.: A quantitative assessment of source
contributions to inhalable particulate matter pollution in metropolitan
Boston, Atmos. Environ., 19, 9–25,
https://doi.org/10.1016/0004-6981(85)90132-5, 1985.
Vaughan, M. A., Young, S. A., Winker, D. M., Powell, K. A., Omar, A. H., Liu, Z., Hu, Y., and Hostetler, C. A.: Fully automated analysis of space-based lidar data: an overview of the CALIPSO retrieval algorithms and data products, in: Proceedings of SPIE Volume 5575, Laser Radar Techniques for Atmospheric Sensing, Maspalomas, Canary Islands, Spain, 4 November 2004, 16–30, https://doi.org/10.1117/12.572024, 2004.
Wang, H. and Shooter, D.: Low molecular weight dicarboxylic acids in PM10
in a city with intensive solid fuel burning, Chemosphere, 56, 725–733,
https://doi.org/10.1016/j.chemosphere.2004.04.030, 2004.
Wang, J., Ge, C., Yang, Z., Hyer, E. J., Reid, J. S., Chew, B.-N., Mahmud,
M., Zhang, Y., and Zhang, M.: Mesoscale modeling of smoke transport over the
Southeast Asian Maritime Continent: Interplay of sea breeze, trade wind,
typhoon, and topography, Atmos. Res., 122, 486–503,
https://doi.org/10.1016/j.atmosres.2012.05.009, 2013.
Wang, S.-H., Tsay, S.-C., Lin, N.-H., Hsu, N. C., Bell, S. W., Li, C., Ji,
Q., Jeong, M.-J., Hansell, R. A., Welton, E. J., Holben, B. N., Sheu, G.-R.,
Chu, Y.-C., Chang, S.-C., Liu, J.-J., and Chiang, W.-L.: First detailed
observations of long-range transported dust over the northern South China
Sea, Atmos. Environ., 45, 4804–4808,
https://doi.org/10.1016/j.atmosenv.2011.04.077, 2011.
Weber, R. J., Sullivan, A. P., Peltier, R. E., Russell, A., Yan, B., Zheng,
M., de Gouw, J., Warneke, C., Brock, C., Holloway, J. S., Atlas, E. L., and
Edgerton, E.: A study of secondary organic aerosol formation in the
anthropogenic-influenced southeastern United States, J. Geophys.
Res.-Atmos., 112, D13302, https://doi.org/10.1029/2007jd008408, 2007.
Wen, H. and Carignan, J.: Reviews on atmospheric selenium: Emissions,
speciation and fate, Atmos. Environ., 41, 7151–7165,
https://doi.org/10.1016/j.atmosenv.2007.07.035, 2007.
Winker, D. M., Vaughan, M. A., Omar, A., Hu, Y., Powell, K. A., Liu, Z.,
Hunt, W. H., and Young, S. A.: Overview of the CALIPSO Mission and CALIOP
Data Processing Algorithms, J. Atmos. Ocean. Tech., 26, 2310–2323,
https://doi.org/10.1175/2009jtecha1281.1, 2009.
Wonaschuetz, A., Sorooshian, A., Ervens, B., Chuang, P. Y., Feingold, G.,
Murphy, S. M., de Gouw, J., Warneke, C., and Jonsson, H. H.: Aerosol and gas
re-distribution by shallow cumulus clouds: An investigation using airborne
measurements, J. Geophys. Res.-Atmos., 117, D17202, https://doi.org/10.1029/2012jd018089, 2012.
Xian, P., Reid, J. S., Atwood, S. A., Johnson, R. S., Hyer, E. J., Westphal,
D. L., and Sessions, W.: Smoke aerosol transport patterns over the Maritime
Continent, Atmos. Res., 122, 469–485,
https://doi.org/10.1016/j.atmosres.2012.05.006, 2013.
Xu, J., Zhang, J., Liu, J., Yi, K., Xiang, S., Hu, X., Wang, Y., Tao, S., and Ban-Weiss, G.: Influence of cloud microphysical processes on black carbon wet removal, global distributions, and radiative forcing, Atmos. Chem. Phys., 19, 1587–1603, https://doi.org/10.5194/acp-19-1587-2019, 2019.
Yamasoe, M. A., Artaxo, P., Miguel, A. H., and Allen, A. G.: Chemical
composition of aerosol particles from direct emissions of vegetation fires
in the Amazon Basin: water-soluble species and trace elements, Atmos.
Environ., 34, 1641–1653, https://doi.org/10.1016/S1352-2310(99)00329-5,
2000.
Yan, J., Chen, L., Lin, Q., Zhao, S., and Zhang, M.: Effect of typhoon on
atmospheric aerosol particle pollutants accumulation over Xiamen, China,
Chemosphere, 159, 244–255,
https://doi.org/10.1016/j.chemosphere.2016.06.006, 2016.
Yao, X., Fang, M., Chan, C. K., Ho, K. F., and Lee, S. C.: Characterization
of dicarboxylic acids in PM2.5 in Hong Kong, Atmos. Environ., 38, 963–970,
https://doi.org/10.1016/j.atmosenv.2003.10.048, 2004.
Yokelson, R. J., Crounse, J. D., DeCarlo, P. F., Karl, T., Urbanski, S., Atlas, E., Campos, T., Shinozuka, Y., Kapustin, V., Clarke, A. D., Weinheimer, A., Knapp, D. J., Montzka, D. D., Holloway, J., Weibring, P., Flocke, F., Zheng, W., Toohey, D., Wennberg, P. O., Wiedinmyer, C., Mauldin, L., Fried, A., Richter, D., Walega, J., Jimenez, J. L., Adachi, K., Buseck, P. R., Hall, S. R., and Shetter, R.: Emissions from biomass burning in the Yucatan, Atmos. Chem. Phys., 9, 5785–5812, https://doi.org/10.5194/acp-9-5785-2009, 2009.
Zhang, Y.-N., Zhang, Z.-S., Chan, C.-Y., Engling, G., Sang, X.-F., Shi, S.,
and Wang, X.-M.: Levoglucosan and carbonaceous species in the background
aerosol of coastal southeast China: case study on transport of biomass
burning smoke from the Philippines, Environ. Sci. Pollut. R., 19, 244–255,
https://doi.org/10.1007/s11356-011-0548-7, 2012.
Zhao, X., Wang, X., Ding, X., He, Q., Zhang, Z., Liu, T., Fu, X., Gao, B.,
Wang, Y., Zhang, Y., Deng, X., and Wu, D.: Compositions and sources of
organic acids in fine particles (PM2.5) over the Pearl River Delta region,
south China, J. Environ. Sci., 26, 110–121,
https://doi.org/10.1016/S1001-0742(13)60386-1, 2014.
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