Articles | Volume 18, issue 22
Atmos. Chem. Phys., 18, 16325–16344, 2018
https://doi.org/10.5194/acp-18-16325-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 18, 16325–16344, 2018
https://doi.org/10.5194/acp-18-16325-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
16 Nov 2018
Research article
| 16 Nov 2018
High-spatial-resolution mapping and source apportionment of aerosol composition in Oakland, California, using mobile aerosol mass spectrometry
Rishabh U. Shah et al.
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Daniel R. Peters, Olalekan A. M. Popoola, Roderic L. Jones, Nicholas A. Martin, Jim Mills, Elizabeth R. Fonseca, Amy Stidworthy, Ella Forsyth, David Carruthers, Megan Dupuy-Todd, Felicia Douglas, Katie Moore, Rishabh U. Shah, Lauren E. Padilla, and Ramón A. Alvarez
Atmos. Meas. Tech., 15, 321–334, https://doi.org/10.5194/amt-15-321-2022, https://doi.org/10.5194/amt-15-321-2022, 2022
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We present more than 2 years of NO2 pollution measurements from a sensor network in Greater London and compare results to an extensive network of expensive reference-grade monitors. We show the ability of our lower-cost network to generate robust insights about local air pollution. We also show how irregularities in sensor performance lead to some uncertainty in results and demonstrate ways that future users can characterize and mitigate uncertainties to get the most value from sensor data.
Daniel Furuta, Tofigh Sayahi, Jinsheng Li, Bruce Wilson, Albert A. Presto, and Jiayu Li
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2022-110, https://doi.org/10.5194/amt-2022-110, 2022
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Methane is a major greenhouse gas and contributor to climate change, with various human-caused and natural sources. Currently, atmospheric methane is expensive to sense. We investigate repurposing cheap methane safety sensors for atmospheric sensing, finding several promising sensors and identifying some of the challenges in this approach. This work will help in developing inexpensive sensor networks for methane monitoring, which will aid in reducing methane leaks and emissions.
Daniel R. Peters, Olalekan A. M. Popoola, Roderic L. Jones, Nicholas A. Martin, Jim Mills, Elizabeth R. Fonseca, Amy Stidworthy, Ella Forsyth, David Carruthers, Megan Dupuy-Todd, Felicia Douglas, Katie Moore, Rishabh U. Shah, Lauren E. Padilla, and Ramón A. Alvarez
Atmos. Meas. Tech., 15, 321–334, https://doi.org/10.5194/amt-15-321-2022, https://doi.org/10.5194/amt-15-321-2022, 2022
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We present more than 2 years of NO2 pollution measurements from a sensor network in Greater London and compare results to an extensive network of expensive reference-grade monitors. We show the ability of our lower-cost network to generate robust insights about local air pollution. We also show how irregularities in sensor performance lead to some uncertainty in results and demonstrate ways that future users can characterize and mitigate uncertainties to get the most value from sensor data.
Rongzhi Tang, Quanyang Lu, Song Guo, Hui Wang, Kai Song, Ying Yu, Rui Tan, Kefan Liu, Ruizhe Shen, Shiyi Chen, Limin Zeng, Spiro D. Jorga, Zhou Zhang, Wenbin Zhang, Shijin Shuai, and Allen L. Robinson
Atmos. Chem. Phys., 21, 2569–2583, https://doi.org/10.5194/acp-21-2569-2021, https://doi.org/10.5194/acp-21-2569-2021, 2021
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We performed chassis dynamometer experiments to investigate the emissions and secondary organic aerosol (SOA) formation potential of intermediate volatility organic compounds (IVOCs) from an on-road Chinese gasoline vehicle. High IVOC emission factors (EFs) and distinct volatility distribution were recognized. Our results indicate that vehicular IVOCs contribute significantly to SOA, implying the importance of reducing IVOCs when making air pollution control policies in urban areas of China.
Shahzad Gani, Sahil Bhandari, Kanan Patel, Sarah Seraj, Prashant Soni, Zainab Arub, Gazala Habib, Lea Hildebrandt Ruiz, and Joshua S. Apte
Atmos. Chem. Phys., 20, 8533–8549, https://doi.org/10.5194/acp-20-8533-2020, https://doi.org/10.5194/acp-20-8533-2020, 2020
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Delhi, India, has had the highest fine particle mass (PM2.5; diameter < 2.5 µm) concentrations of any megacity on the planet in recent years. Here, we undertook a year of detailed measurements of particle size distributions. We observed that the number count of ultrafine particles (diameter < 100 nm) – unlike PM2.5 – is not dramatically elevated in Delhi. Using observations and a simple model, we illustrate how the high amount of PM2.5 in Delhi may suppress ultrafine particle concentrations.
Carl Malings, Daniel M. Westervelt, Aliaksei Hauryliuk, Albert A. Presto, Andrew Grieshop, Ashley Bittner, Matthias Beekmann, and R. Subramanian
Atmos. Meas. Tech., 13, 3873–3892, https://doi.org/10.5194/amt-13-3873-2020, https://doi.org/10.5194/amt-13-3873-2020, 2020
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Most air quality information comes from accurate but expensive instruments. These can be supplemented by lower-cost sensors to increase the density of ground data and expand monitoring into less well-instrumented areas, like sub-Saharan Africa. In this paper, we look at how low-cost sensor data can be combined with satellite information on air quality (which requires ground data to properly calibrate measurements) and assess the benefits these low-cost sensors provide in this context.
Zainab Arub, Sahil Bhandari, Shahzad Gani, Joshua S. Apte, Lea Hildebrandt Ruiz, and Gazala Habib
Atmos. Chem. Phys., 20, 6953–6971, https://doi.org/10.5194/acp-20-6953-2020, https://doi.org/10.5194/acp-20-6953-2020, 2020
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Aerosol physiochemical properties were characterized for three prominent air masses over New Delhi, a highly polluted megacity. The chemical composition and size distribution data were used to deduce the hygroscopicity parameter and cloud condensation nuclei (CCN) number concentration. The activated fraction was the highest in the world for any continental site. The aerosol physiochemical properties and their diurnal patterns were interlinked and impacted aerosol hygroscopicity and CCN activity.
Quanyang Lu, Benjamin N. Murphy, Momei Qin, Peter J. Adams, Yunliang Zhao, Havala O. T. Pye, Christos Efstathiou, Chris Allen, and Allen L. Robinson
Atmos. Chem. Phys., 20, 4313–4332, https://doi.org/10.5194/acp-20-4313-2020, https://doi.org/10.5194/acp-20-4313-2020, 2020
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This research work investigates organic aerosol formation in California during the CalNex study. We update the chemical transport model with the most recent mobile-source emission data and introduce a simple parameterization for secondary organic aerosol formed from intermediate-volatility organic compounds. Our results highlight the important contribution of IVOCs to SOA production in the Los Angeles region but underscore that other uncertainties must be addressed to close the SOA mass balance.
Leigh R. Crilley, Ajit Singh, Louisa J. Kramer, Marvin D. Shaw, Mohammed S. Alam, Joshua S. Apte, William J. Bloss, Lea Hildebrandt Ruiz, Pingqing Fu, Weiqi Fu, Shahzad Gani, Michael Gatari, Evgenia Ilyinskaya, Alastair C. Lewis, David Ng'ang'a, Yele Sun, Rachel C. W. Whitty, Siyao Yue, Stuart Young, and Francis D. Pope
Atmos. Meas. Tech., 13, 1181–1193, https://doi.org/10.5194/amt-13-1181-2020, https://doi.org/10.5194/amt-13-1181-2020, 2020
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There is considerable interest in using low-cost optical particle counters (OPCs) for particle mass measurements; however, there is no agreed upon method with respect to calibration. Here we exploit a number of datasets globally to demonstrate that particle composition and relative humidity are the key factors affecting measured concentrations from a low-cost OPC, and we present a simple correction methodology that corrects for this influence.
Joseph R. Salazar, Benton T. Cartledge, John P. Haynes, Rachel York-Marini, Allen L. Robinson, Greg T. Drozd, Allen H. Goldstein, Sirine C. Fakra, and Brian J. Majestic
Atmos. Chem. Phys., 20, 1849–1860, https://doi.org/10.5194/acp-20-1849-2020, https://doi.org/10.5194/acp-20-1849-2020, 2020
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The solubility of atmospheric iron is important in human health and environmental chemistry. To understand the origin of water-soluble iron in urban areas, tailpipe emissions were collected from 32 low-emitting vehicles, from which iron solubility averaged 30 % (0–82 %), more than 10 times the average in the Earth's crust. Water-soluble iron was independent of almost all exhaust components and of the iron phase in the particles but was correlated with specific exhaust-derived organic compounds.
Sahil Bhandari, Shahzad Gani, Kanan Patel, Dongyu S. Wang, Prashant Soni, Zainab Arub, Gazala Habib, Joshua S. Apte, and Lea Hildebrandt Ruiz
Atmos. Chem. Phys., 20, 735–752, https://doi.org/10.5194/acp-20-735-2020, https://doi.org/10.5194/acp-20-735-2020, 2020
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Delhi, India, is the most polluted megacity on the planet, posing acute challenges to public health. We report on source apportionment conducted on 15 months of highly time-resolved mass spectrometer data. We find that severe air pollution episodes are dominated by primary organic aerosol, while secondary organic aerosol dominates the fractional contributions year-round, suggesting the importance of sources as well as their atmospheric processing on pollution levels in Delhi.
Shahzad Gani, Sahil Bhandari, Sarah Seraj, Dongyu S. Wang, Kanan Patel, Prashant Soni, Zainab Arub, Gazala Habib, Lea Hildebrandt Ruiz, and Joshua S. Apte
Atmos. Chem. Phys., 19, 6843–6859, https://doi.org/10.5194/acp-19-6843-2019, https://doi.org/10.5194/acp-19-6843-2019, 2019
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Delhi experiences particulate matter concentrations that are among the highest in the world. We conducted a long-term campaign to make highly time-resolved measurements of submicron particle (PM1) chemical composition in Delhi. Our dataset illuminates key sources and atmospheric processes that impact Delhi's PM1 concentrations, with sharp differences among seasons and between day and night. In addition to local sources, Delhi's PM1 levels are amplified by regional pollution and meteorology.
Carl Malings, Rebecca Tanzer, Aliaksei Hauryliuk, Sriniwasa P. N. Kumar, Naomi Zimmerman, Levent B. Kara, Albert A. Presto, and R. Subramanian
Atmos. Meas. Tech., 12, 903–920, https://doi.org/10.5194/amt-12-903-2019, https://doi.org/10.5194/amt-12-903-2019, 2019
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This paper compares several methods for calibrating data from low-cost air quality monitors to reflect the concentrations of various gaseous pollutants in the atmosphere, identifying the best-performing approaches. With these calibration methods, such monitors can be used to gather information on air quality at a higher spatial resolution than is possible using traditional technologies and can be deployed to areas (e.g. developing countries) where there are no existing monitor networks.
Quanyang Lu, Yunliang Zhao, and Allen L. Robinson
Atmos. Chem. Phys., 18, 17637–17654, https://doi.org/10.5194/acp-18-17637-2018, https://doi.org/10.5194/acp-18-17637-2018, 2018
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This work combines previously published data to illustrate the mechanics of emission from internal combustion engine sources. Engine exhaust can be decomposed into combustion "by-product", "unburned fuel" and "oil" modes. Intermediate and semi-volatile organic compounds are included to create comprehensive model-ready organic emission profiles. Gasoline and gas-turbine engine emissions are enriched in intermediate volatile organic compounds relative to unburned fuel.
Penglin Ye, Yunliang Zhao, Wayne K. Chuang, Allen L. Robinson, and Neil M. Donahue
Atmos. Chem. Phys., 18, 6171–6186, https://doi.org/10.5194/acp-18-6171-2018, https://doi.org/10.5194/acp-18-6171-2018, 2018
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This work describes experiments to constrain the production of secondary organic aerosol from pinanediol, a semi-volatile oxidation product of α-pinene. Our results and the implications for SOA aging are directly relevant to the atmospheric chemistry community because they connect new-particle formation experiments and SOA formation experiments. The oxidation conditions are typically different and experiments are also influenced in different ways by wall losses of condensible vapors.
Naomi Zimmerman, Albert A. Presto, Sriniwasa P. N. Kumar, Jason Gu, Aliaksei Hauryliuk, Ellis S. Robinson, Allen L. Robinson, and R. Subramanian
Atmos. Meas. Tech., 11, 291–313, https://doi.org/10.5194/amt-11-291-2018, https://doi.org/10.5194/amt-11-291-2018, 2018
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Low-cost sensors promise neighborhood-scale air quality monitoring but have been plagued by inconsistent performance for precision, accuracy, and drift. CMU and SenSevere collaborated to develop the RAMP, which uses electrochemical sensors. We present a machine learning algorithm that overcomes previous performance issues and meets US EPA's data quality recommendations for personal exposure for NO2 and tougher "supplemental monitoring" standards for CO & ozone across 19 RAMPs for several months.
Prettiny K. Ma, Yunliang Zhao, Allen L. Robinson, David R. Worton, Allen H. Goldstein, Amber M. Ortega, Jose L. Jimenez, Peter Zotter, André S. H. Prévôt, Sönke Szidat, and Patrick L. Hayes
Atmos. Chem. Phys., 17, 9237–9259, https://doi.org/10.5194/acp-17-9237-2017, https://doi.org/10.5194/acp-17-9237-2017, 2017
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Airborne particulate matter (PM) negatively impacts air quality in cities throughout the world. An important fraction of PM is organic aerosol. We have evaluated and developed several new models for secondary organic aerosol (SOA), which is formed from the chemical processing of gaseous precursors. Using our model results, we have quantified important SOA sources and precursors and also identified possible model parameterizations that could be used for air quality predictions.
Shantanu H. Jathar, Matthew Woody, Havala O. T. Pye, Kirk R. Baker, and Allen L. Robinson
Atmos. Chem. Phys., 17, 4305–4318, https://doi.org/10.5194/acp-17-4305-2017, https://doi.org/10.5194/acp-17-4305-2017, 2017
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Mobile sources such as cars and trucks are large sources of pollution in cities, but it is unclear what their relative contribution to organic particle pollution is. We used a numerical model along with recent data gathered from tests performed on cars and trucks to calculate organic particle levels in southern California. We found that model calculations agreed better with measurements and gasoline cars and trucks dominated the organic particle pollution.
M. C. Woody, J. J. West, S. H. Jathar, A. L. Robinson, and S. Arunachalam
Atmos. Chem. Phys., 15, 6929–6942, https://doi.org/10.5194/acp-15-6929-2015, https://doi.org/10.5194/acp-15-6929-2015, 2015
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Utilizing an aircraft-specific parameterization based on smog chamber data in a regional AQM, contributions of non-traditional secondary organic aerosols (NTSOA) from aircraft emissions of semi-volatile and intermediate volatility organic compounds were assessed. NTSOA, a previously unaccounted component of PM2.5 in most AQMs, contributed up to 7.4% of aviation-attributable PM2.5 at the airport and rose to 17.9% downwind, suggesting its significance in aviation-attributed PM2.5 at all scales.
J. R. Roscioli, T. I. Yacovitch, C. Floerchinger, A. L. Mitchell, D. S. Tkacik, R. Subramanian, D. M. Martinez, T. L. Vaughn, L. Williams, D. Zimmerle, A. L. Robinson, S. C. Herndon, and A. J. Marchese
Atmos. Meas. Tech., 8, 2017–2035, https://doi.org/10.5194/amt-8-2017-2015, https://doi.org/10.5194/amt-8-2017-2015, 2015
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This report presents an overview and detailed description of the measurement methods, analysis approach, and example data from a 10-week EDF-sponsored field campaign measuring methane emissions from natural gas gathering and processing facilities across the US. The dual-tracer ratio method was employed to quantify methane release rates and identify emission sources at a wide variety of facilities, using downwind measurements of CH4, C2H6, CO2, and CO with N2O and C2H2 as tracers.
C. E. Stockwell, R. J. Yokelson, S. M. Kreidenweis, A. L. Robinson, P. J. DeMott, R. C. Sullivan, J. Reardon, K. C. Ryan, D. W. T. Griffith, and L. Stevens
Atmos. Chem. Phys., 14, 9727–9754, https://doi.org/10.5194/acp-14-9727-2014, https://doi.org/10.5194/acp-14-9727-2014, 2014
B. N. Murphy, N. M. Donahue, A. L. Robinson, and S. N. Pandis
Atmos. Chem. Phys., 14, 5825–5839, https://doi.org/10.5194/acp-14-5825-2014, https://doi.org/10.5194/acp-14-5825-2014, 2014
S. H. Jathar, N. M. Donahue, P. J. Adams, and A. L. Robinson
Atmos. Chem. Phys., 14, 5771–5780, https://doi.org/10.5194/acp-14-5771-2014, https://doi.org/10.5194/acp-14-5771-2014, 2014
A. A. Presto, T. D. Gordon, and A. L. Robinson
Atmos. Chem. Phys., 14, 5015–5036, https://doi.org/10.5194/acp-14-5015-2014, https://doi.org/10.5194/acp-14-5015-2014, 2014
T. D. Gordon, A. A. Presto, N. T. Nguyen, W. H. Robertson, K. Na, K. N. Sahay, M. Zhang, C. Maddox, P. Rieger, S. Chattopadhyay, H. Maldonado, M. M. Maricq, and A. L. Robinson
Atmos. Chem. Phys., 14, 4643–4659, https://doi.org/10.5194/acp-14-4643-2014, https://doi.org/10.5194/acp-14-4643-2014, 2014
T. D. Gordon, A. A. Presto, A. A. May, N. T. Nguyen, E. M. Lipsky, N. M. Donahue, A. Gutierrez, M. Zhang, C. Maddox, P. Rieger, S. Chattopadhyay, H. Maldonado, M. M. Maricq, and A. L. Robinson
Atmos. Chem. Phys., 14, 4661–4678, https://doi.org/10.5194/acp-14-4661-2014, https://doi.org/10.5194/acp-14-4661-2014, 2014
R. Saleh, C. J. Hennigan, G. R. McMeeking, W. K. Chuang, E. S. Robinson, H. Coe, N. M. Donahue, and A. L. Robinson
Atmos. Chem. Phys., 13, 7683–7693, https://doi.org/10.5194/acp-13-7683-2013, https://doi.org/10.5194/acp-13-7683-2013, 2013
Related subject area
Subject: Aerosols | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
Measurement report: Effects of anthropogenic emissions and environmental factors on the formation of biogenic secondary organic aerosol (BSOA) in a coastal city of southeastern China
Highly time-resolved chemical speciation and source apportionment of organic aerosol components in Delhi, India, using extractive electrospray ionization mass spectrometry
The chemical composition and mixing state of BC-containing particles and the implications on light absorption enhancement
Evidence of haze-driven secondary production of supermicrometer aerosol nitrate and sulfate in size distribution data in South Korea
Spatial variability of air pollutants in a megacity characterized by mobile measurements
Linking Switzerland's PM10 and PM2.5 oxidative potential (OP) with emission sources
Reversible and irreversible gas–particle partitioning of dicarbonyl compounds observed in the real atmosphere
Molecular characteristics, sources, and formation pathways of organosulfur compounds in ambient aerosol in Guangzhou, South China
Evolution of source attributed organic aerosols and gases in a megacity of central China
Measurement report: Hygroscopic growth of ambient fine particles measured at five sites in China
Measurement report: Optical properties and sources of water-soluble brown carbon in Tianjin, North China – insights from organic molecular compositions
Trends in secondary inorganic aerosol pollution in China and its responses to emission controls of precursors in wintertime
Measurement report: Source apportionment of carbonaceous aerosol using dual-carbon isotopes (13C and 14C) and levoglucosan in three northern Chinese cities during 2018–2019
Chemically speciated mass size distribution, particle density, shape and origin of non-refractory PM1 measured at a rural background site in central Europe
Offline analysis of the chemical composition and hygroscopicity of submicrometer aerosol at an Asian outflow receptor site and comparison with online measurements
High number concentrations of transparent exopolymer particles in ambient aerosol particles and cloud water – a case study at the tropical Atlantic Ocean
Micro-spectroscopic and freezing characterization of ice-nucleating particles collected in the marine boundary layer in the eastern North Atlantic
Oxidation pathways and emission sources of atmospheric particulate nitrate in Seoul: based on δ15N and Δ17O measurements
Measurement report: Characterization and source apportionment of coarse particulate matter in Hong Kong: insights into the constituents of unidentified mass and source origins in a coastal city in southern China
The optical properties and in-situ observational evidence for the formation of brown carbon in clouds
Chemical properties, sources and size-resolved hygroscopicity of submicron black carbon-containing aerosols in urban Shanghai
High atmospheric oxidation capacity drives wintertime nitrate pollution in the eastern Yangtze River Delta of China
Development and evolution of an anomalous Asian dust event across Europe in March 2020
What caused a record high PM10 episode in northern Europe in October 2020?
Sensitivity of low-level clouds and precipitation to anthropogenic aerosol emission in southern West Africa: a DACCIWA case study
Pan-Arctic seasonal cycles and long-term trends of aerosol properties from 10 observatories
Analysis of reduced and oxidized nitrogen-containing organic compounds at a coastal site in summer and winter
Sources and processes of iron aerosols in a megacity in Eastern China
Measurement report: Size-resolved chemical characterisation of aerosols in low-income urban settlements in South Africa
Dramatic changes in atmospheric pollution source contributions for a coastal megacity in North China from 2011 to 2020
Mapping gaseous dimethylamine, trimethylamine, ammonia, and their particulate counterparts in marine atmospheres of China’s marginal seas – Part 2: Spatiotemporal heterogeneity, causes, and hypothesis
Single-particle characterization of polycyclic aromatic hydrocarbons in background air in northern Europe
Regional heterogeneities in the emission of airborne primary sugar compounds and biogenic secondary organic aerosols in the East Asian outflow: evidence for coal combustion as a source of levoglucosan
Influence of organic aerosol molecular composition on particle absorptive properties in autumn Beijing
The importance of alkyl nitrates and sea ice emissions to atmospheric NOx sources and cycling in the summertime Southern Ocean marine boundary layer
Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol
Polycyclic aromatic hydrocarbons (PAHs) and their alkylated-, nitro- and oxy-derivatives in the atmosphere over the Mediterranean and Middle East seas
Measurement report: Particle-size-dependent fluorescence properties of water-soluble organic compounds (WSOCs) and their atmospheric implications for the aging of WSOCs
Impact of non-ideality on reconstructing spatial and temporal variations in aerosol acidity with multiphase buffer theory
Mercury isotopic compositions in fine particles and offshore surface seawater in a coastal area of East China: implications for Hg sources and atmospheric transformations
Urban aerosol chemistry at a land–water transition site during summer – Part 2: Aerosol pH and liquid water content
First insights into northern Africa high-altitude background aerosol chemical composition and source influences
Impact of dry intrusion events on the composition and mixing state of particles during the winter Aerosol and Cloud Experiment in the Eastern North Atlantic (ACE-ENA)
Diverse mixing states of amine-containing single particles in Nanjing, China
Long-range transport of anthropogenic air pollutants into the marine air: insight into fine particle transport and chloride depletion on sea salts
Measurement report: The importance of biomass burning in light extinction and direct radiative effect of urban aerosol during the COVID-19 lockdown in China
Response of atmospheric composition to COVID-19 lockdown measures during spring in the Paris region (France)
Transport-driven aerosol differences above and below the canopy of a mixed deciduous forest
Origin of water-soluble organic aerosols at the Maïdo high-altitude observatory, Réunion Island, in the tropical Indian Ocean
Sources and nature of ice-nucleating particles in the free troposphere at Jungfraujoch in winter 2017
Youwei Hong, Xinbei Xu, Dan Liao, Taotao Liu, Xiaoting Ji, Ke Xu, Chunyang Liao, Ting Wang, Chunshui Lin, and Jinsheng Chen
Atmos. Chem. Phys., 22, 7827–7841, https://doi.org/10.5194/acp-22-7827-2022, https://doi.org/10.5194/acp-22-7827-2022, 2022
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Secondary organic aerosol (SOA) simulation remains uncertain, due to the unknown SOA formation mechanisms. Aerosol samples with a 4 h time resolution were collected, along with online measurements of aerosol chemical compositions and meteorological parameters. We found that anthropogenic emissions, atmospheric oxidation capacity and halogen chemistry have significant effects on the formation of biogenic SOA (BSOA). The findings of this study are helpful to better explore the missed SOA sources.
Varun Kumar, Stamatios Giannoukos, Sophie L. Haslett, Yandong Tong, Atinderpal Singh, Amelie Bertrand, Chuan Ping Lee, Dongyu S. Wang, Deepika Bhattu, Giulia Stefenelli, Jay S. Dave, Joseph V. Puthussery, Lu Qi, Pawan Vats, Pragati Rai, Roberto Casotto, Rangu Satish, Suneeti Mishra, Veronika Pospisilova, Claudia Mohr, David M. Bell, Dilip Ganguly, Vishal Verma, Neeraj Rastogi, Urs Baltensperger, Sachchida N. Tripathi, André S. H. Prévôt, and Jay G. Slowik
Atmos. Chem. Phys., 22, 7739–7761, https://doi.org/10.5194/acp-22-7739-2022, https://doi.org/10.5194/acp-22-7739-2022, 2022
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Here we present source apportionment results from the first field deployment in Delhi of an extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF). The EESI-TOF is a recently developed instrument capable of providing uniquely detailed online chemical characterization of organic aerosol (OA), in particular the secondary OA (SOA) fraction. Here, we are able to apportion not only primary OA but also SOA to specific sources, which is performed for the first time in Delhi.
Jiaxing Sun, Yele Sun, Conghui Xie, Weiqi Xu, Chun Chen, Zhe Wang, Lei Li, Xubing Du, Fugui Huang, Yan Li, Zhijie Li, Xiaole Pan, Nan Ma, Wanyun Xu, Pingqing Fu, and Zifa Wang
Atmos. Chem. Phys., 22, 7619–7630, https://doi.org/10.5194/acp-22-7619-2022, https://doi.org/10.5194/acp-22-7619-2022, 2022
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We analyzed the chemical composition and mixing state of BC-containing particles at urban and rural sites in winter in the North China Plain and evaluated their impact on light absorption enhancement. BC was dominantly mixed with organic carbon, nitrate, and sulfate, and the mixing state evolved significantly as a function of relative humidity (RH) at both sites. The absorption enhancement depended strongly on coated secondary inorganic aerosol and was up to ~1.3–1.4 during aging processes.
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.
Reza Bashiri Khuzestani, Keren Liao, Ying Liu, Ruqian Miao, Yan Zheng, Xi Cheng, Tianjiao Jia, Xin Li, Shiyi Chen, Guancong Huang, and Qi Chen
Atmos. Chem. Phys., 22, 7389–7404, https://doi.org/10.5194/acp-22-7389-2022, https://doi.org/10.5194/acp-22-7389-2022, 2022
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This work characterized the spatial variabilities of air pollutants in a megacity by advanced mobile measurements. The results show a large spatial heterogeneity in the distributions of PM2.5 composition and volatile organic compounds under non-haze conditions, and relatively uniform spatial distributions under haze conditions that may indicate a chemical homogeneity on an intracity scale. The findings improve our understanding of urban air pollution.
Stuart K. Grange, Gaëlle Uzu, Samuël Weber, Jean-Luc Jaffrezo, and Christoph Hueglin
Atmos. Chem. Phys., 22, 7029–7050, https://doi.org/10.5194/acp-22-7029-2022, https://doi.org/10.5194/acp-22-7029-2022, 2022
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Oxidative potential (OP), a biologically relevant metric for particulate matter (PM), was linked to PM10 and PM2.5 sources and constituents across Switzerland between 2018 and 2019. Wood burning and non-exhaust traffic emissions were identified as key processes that led to enhanced OP. Therefore, the make-up of the PM mix was very important for OP. The results highlight the importance of the management of wood burning and non-exhaust emissions to reduce OP, and presumably biological harm.
Jingcheng Hu, Zhongming Chen, Xuan Qin, and Ping Dong
Atmos. Chem. Phys., 22, 6971–6987, https://doi.org/10.5194/acp-22-6971-2022, https://doi.org/10.5194/acp-22-6971-2022, 2022
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The gas–particle partitioning process of glyoxal and methylglyoxal could contribute to secondary organic aerosol formation. Here, we launched five observations in different seasons and simultaneously measured glyoxal and methylglyoxal in the gas and particle phases. Compared to reversible pathways, irreversible pathways played a dominant role with a proportion of more than 90 % in the ambient atmosphere, and the proportion was influenced by relative humidity and inorganic components in aerosols.
Hongxing Jiang, Jun Li, Jiao Tang, Min Cui, Shizhen Zhao, Yangzhi Mo, Chongguo Tian, Xiangyun Zhang, Bin Jiang, Yuhong Liao, Yingjun Chen, and Gan Zhang
Atmos. Chem. Phys., 22, 6919–6935, https://doi.org/10.5194/acp-22-6919-2022, https://doi.org/10.5194/acp-22-6919-2022, 2022
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We conducted field observation employing Fourier transform ion cyclotron resonance mass spectrometry to characterize the molecular composition and major formation pathways or sources of organosulfur compounds in Guangzhou, where is heavily influenced by biogenic–anthropogenic interactions and has high relative humidity and temperature. We suggested that heterogeneous reactions such as SO2 uptake and heterogeneous oxidations are important to the molecular variations of organosulfur compounds.
Siyuan Li, Dantong Liu, Shaofei Kong, Yangzhou Wu, Kang Hu, Huang Zheng, Yi Cheng, Shurui Zheng, Xiaotong Jiang, Shuo Ding, Dawei Hu, Quan Liu, Ping Tian, Delong Zhao, and Jiujiang Sheng
Atmos. Chem. Phys., 22, 6937–6951, https://doi.org/10.5194/acp-22-6937-2022, https://doi.org/10.5194/acp-22-6937-2022, 2022
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The understanding of secondary organic aerosols is hindered by the aerosol–gas evolution by different oxidation mechanisms. By concurrently measuring detailed mass spectra of aerosol and gas phases in a megacity online, we identified the primary and secondary source sectors and investigated the transformation between gas and aerosol phases influenced by photooxidation and moisture. The results will help us to understand the respective evolution of major sources in a typical urban environment.
Lu Chen, Fang Zhang, Dongmei Zhang, Xinming Wang, Wei Song, Jieyao Liu, Jingye Ren, Sihui Jiang, Xue Li, and Zhanqing Li
Atmos. Chem. Phys., 22, 6773–6786, https://doi.org/10.5194/acp-22-6773-2022, https://doi.org/10.5194/acp-22-6773-2022, 2022
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Aerosol hygroscopicity is critical when evaluating its effect on visibility and climate. Here, the size-resolved particle hygroscopicity at five sites in China is characterized using field measurements. We show the distinct behavior of hygroscopic particles during pollution evolution among the five sites. Moreover, different hygroscopic behavior during NPF events were also observed. The dataset is helpful for understanding the spatial variability in particle composition and formation mechanisms.
Junjun Deng, Hao Ma, Xinfeng Wang, Shujun Zhong, Zhimin Zhang, Jialei Zhu, Yanbing Fan, Wei Hu, Libin Wu, Xiaodong Li, Lujie Ren, Chandra Mouli Pavuluri, Xiaole Pan, Yele Sun, Zifa Wang, Kimitaka Kawamura, and Pingqing Fu
Atmos. Chem. Phys., 22, 6449–6470, https://doi.org/10.5194/acp-22-6449-2022, https://doi.org/10.5194/acp-22-6449-2022, 2022
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Light-absorbing brown carbon (BrC) plays an important role in climate change and atmospheric chemistry. Here we investigated the seasonal and diurnal variations in water-soluble BrC in PM2.5 in the megacity Tianjin in coastal China. Results of the source apportionments from the combination with organic molecular compositions and optical properties of water-soluble BrC reveal a large contribution from primary bioaerosol particles to BrC in the urban atmosphere.
Fanlei Meng, Yibo Zhang, Jiahui Kang, Mathew R. Heal, Stefan Reis, Mengru Wang, Lei Liu, Kai Wang, Shaocai Yu, Pengfei Li, Jing Wei, Yong Hou, Ying Zhang, Xuejun Liu, Zhenling Cui, Wen Xu, and Fusuo Zhang
Atmos. Chem. Phys., 22, 6291–6308, https://doi.org/10.5194/acp-22-6291-2022, https://doi.org/10.5194/acp-22-6291-2022, 2022
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PM2.5 pollution is a pressing environmental issue threatening human health and food security globally. We combined a meta-analysis of nationwide measurements and air quality modeling to identify efficiency gains by striking a balance between controlling NH3 and acid gas emissions. Persistent secondary inorganic aerosol pollution in China is limited by acid gas emissions, while an additional control on NH3 emissions would become more important as reductions in SO2 and NOx emissions progress.
Huiyizhe Zhao, Zhenchuan Niu, Weijian Zhou, Sen Wang, Xue Feng, Shugang Wu, Xuefeng Lu, and Hua Du
Atmos. Chem. Phys., 22, 6255–6274, https://doi.org/10.5194/acp-22-6255-2022, https://doi.org/10.5194/acp-22-6255-2022, 2022
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In this study, we investigated the characteristics and changes in the sources of carbonaceous aerosols in northern Chinese cities using dual-carbon isotopes (13C and 14C) and levoglucosan during 2018 to 2019 and compared them with the research in previous decades. The results show that the contribution of fossil sources has decreased (6–16%) significantly, and non-fossil sources have become the main part of carbonaceous aerosols, which verified the effectiveness of air quality management.
Petra Pokorná, Naděžda Zíková, Petr Vodička, Radek Lhotka, Saliou Mbengue, Adéla Holubová Šmejkalová, Véronique Riffault, Jakub Ondráček, Jaroslav Schwarz, and Vladimír Ždímal
Atmos. Chem. Phys., 22, 5829–5858, https://doi.org/10.5194/acp-22-5829-2022, https://doi.org/10.5194/acp-22-5829-2022, 2022
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By examining individual episodes of high mass and number concentrations, we show that the seasonality in the physicochemical properties of aerosol particles was caused by the sources' diversity and was related to the different air masses and meteorology. We also confirmed the relation between particle size and age that is reflected in oxidation state and shape (difference in densities; effective vs. material). The results have general validity and thus transcend the study regional character.
Yange Deng, Hiroaki Fujinari, Hikari Yai, Kojiro Shimada, Yuzo Miyazaki, Eri Tachibana, Dhananjay K. Deshmukh, Kimitaka Kawamura, Tomoki Nakayama, Shiori Tatsuta, Mingfu Cai, Hanbing Xu, Fei Li, Haobo Tan, Sho Ohata, Yutaka Kondo, Akinori Takami, Shiro Hatakeyama, and Michihiro Mochida
Atmos. Chem. Phys., 22, 5515–5533, https://doi.org/10.5194/acp-22-5515-2022, https://doi.org/10.5194/acp-22-5515-2022, 2022
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Offline analyses of the hygroscopicity and composition of atmospheric aerosols are complementary to online analyses in view of the applicability to broader sizes, specific compound groups, and investigations at remote sites. This offline study characterized the composition of water-soluble matter in aerosols and their humidity-dependent hygroscopicity on Okinawa, a receptor site of East Asian outflow. Further, comparison with online analyses showed the appropriateness of the offline method.
Manuela van Pinxteren, Tiera-Brandy Robinson, Sebastian Zeppenfeld, Xianda Gong, Enno Bahlmann, Khanneh Wadinga Fomba, Nadja Triesch, Frank Stratmann, Oliver Wurl, Anja Engel, Heike Wex, and Hartmut Herrmann
Atmos. Chem. Phys., 22, 5725–5742, https://doi.org/10.5194/acp-22-5725-2022, https://doi.org/10.5194/acp-22-5725-2022, 2022
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A class of marine particles (transparent exopolymer particles, TEPs) that is ubiquitously found in the world oceans was measured for the first time in ambient marine aerosol particles and marine cloud waters in the tropical Atlantic Ocean. TEPs are likely to have good properties for influencing clouds. We show that TEPs are transferred from the ocean to the marine atmosphere via sea-spray formation and our results suggest that they can also form directly in aerosol particles and in cloud water.
Daniel A. Knopf, Joseph C. Charnawskas, Peiwen Wang, Benny Wong, Jay M. Tomlin, Kevin A. Jankowski, Matthew Fraund, Daniel P. Veghte, Swarup China, Alexander Laskin, Ryan C. Moffet, Mary K. Gilles, Josephine Y. Aller, Matthew A. Marcus, Shira Raveh-Rubin, and Jian Wang
Atmos. Chem. Phys., 22, 5377–5398, https://doi.org/10.5194/acp-22-5377-2022, https://doi.org/10.5194/acp-22-5377-2022, 2022
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Marine boundary layer aerosols collected in the remote region of the eastern North Atlantic induce immersion freezing and deposition ice nucleation under typical mixed-phase and cirrus cloud conditions. Corresponding ice nucleation parameterizations for model applications have been derived. Chemical imaging of ambient aerosol and ice-nucleating particles demonstrates that the latter is dominated by sea salt and organics while also representing a major particle type in the particle population.
Saehee Lim, Meehye Lee, Joel Savarino, and Paolo Laj
Atmos. Chem. Phys., 22, 5099–5115, https://doi.org/10.5194/acp-22-5099-2022, https://doi.org/10.5194/acp-22-5099-2022, 2022
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We determined δ15N(NO3−) and Δ17O(NO3−) of PM2.5 in Seoul during 2018–2019 and estimated quantitatively the contribution of oxidation pathways to NO3− formation and NOx emission sources. The nighttime pathway played a significant role in NO3− formation during the winter, and its contribution further increased up to 70 % on haze days when PM2.5 was greater than 75 µg m−3. Vehicle emissions were confirmed as a main NO3− source with an increasing contribution from coal combustion in winter.
Yee Ka Wong, Kin Man Liu, Claisen Yeung, Kenneth K. M. Leung, and Jian Zhen Yu
Atmos. Chem. Phys., 22, 5017–5031, https://doi.org/10.5194/acp-22-5017-2022, https://doi.org/10.5194/acp-22-5017-2022, 2022
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Coarse particulate matter (PM) has been shown to cause adverse health impacts, but compared to PM2.5, the source of coarse PM is less studied through field measurements. We collected chemical composition data for coarse PM in Hong Kong for a 1-year period. Using statistical models, we found that regional transport of fugitive dust is responsible for the elevated coarse PM. This work sets an example of how field measurements can be effectively utilized for evidence-based policymaking.
Ziyong Guo, Yuxiang Yang, Xiaodong Hu, Xiaocong Peng, Yuzhen Fu, Wei Sun, Guohua Zhang, Duohong Chen, Xinhui Bi, Xinming Wang, and Ping'an Peng
Atmos. Chem. Phys., 22, 4827–4839, https://doi.org/10.5194/acp-22-4827-2022, https://doi.org/10.5194/acp-22-4827-2022, 2022
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We show that in-cloud aqueous processing facilitates the formation of brown carbon (BrC), based on the simultaneous measurements of the light-absorption properties of the cloud residuals, cloud interstitial, and cloud-free particles. While extensive laboratory evidence indicated the formation of BrC in aqueous phase, our study represents the first attempt to show the possibility in real clouds, which would have potential implications in the atmospheric evolution and radiation forcing of BrC.
Shijie Cui, Dan Dan Huang, Yangzhou Wu, Junfeng Wang, Fuzhen Shen, Jiukun Xian, Yunjiang Zhang, Hongli Wang, Cheng Huang, Hong Liao, and Xinlei Ge
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-194, https://doi.org/10.5194/acp-2022-194, 2022
Revised manuscript accepted for ACP
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Refractory black carbon (rBC) aerosols are important to both air quality and climate change. However, rBC can mix with many other species therefore change its properties significantly. We used a specific set of techniques to exclusively characterize rBC-containing (rBCc) particles in Shanghai. We figured out composition, sources, size distributions and the factors affecting such physicochemical properties. Our findings are valuable to advance the understanding of BC and its pollution control.
Han Zang, Yue Zhao, Juntao Huo, Qianbiao Zhao, Qingyan Fu, Yusen Duan, Jingyuan Shao, Cheng Huang, Jingyu An, Likun Xue, Ziyue Li, Chenxi Li, and Huayun Xiao
Atmos. Chem. Phys., 22, 4355–4374, https://doi.org/10.5194/acp-22-4355-2022, https://doi.org/10.5194/acp-22-4355-2022, 2022
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Particulate nitrate plays an important role in wintertime haze pollution in eastern China, yet quantitative constraints on detailed nitrate formation mechanisms remain limited. Here we quantified the contributions of the heterogeneous N2O5 hydrolysis (66 %) and gas-phase OH + NO2 reaction (32 %) to nitrate formation in this region and identified the atmospheric oxidation capacity (i.e., availability of O3 and OH radicals) as the driving factor of nitrate formation from both processes.
Laura Tositti, Erika Brattich, Claudio Cassardo, Pietro Morozzi, Alessandro Bracci, Angela Marinoni, Silvana Di Sabatino, Federico Porcù, and Alessandro Zappi
Atmos. Chem. Phys., 22, 4047–4073, https://doi.org/10.5194/acp-22-4047-2022, https://doi.org/10.5194/acp-22-4047-2022, 2022
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We present a thorough investigation of an anomalous transport of mineral dust over a region renowned for excess airborne particulate matter, the Italian Po Valley, which occurred in late March 2021. Both the origin of this dust outbreak, which was localized in central Asia (i.e., the so-called Aralkum Desert), and the upstream synoptic conditions, investigated here in extreme detail using multiple integrated observations including in situ measurements and remote sensing, were atypical.
Christine D. Groot Zwaaftink, Wenche Aas, Sabine Eckhardt, Nikolaos Evangeliou, Paul Hamer, Mona Johnsrud, Arve Kylling, Stephen M. Platt, Kerstin Stebel, Hilde Uggerud, and Karl Espen Yttri
Atmos. Chem. Phys., 22, 3789–3810, https://doi.org/10.5194/acp-22-3789-2022, https://doi.org/10.5194/acp-22-3789-2022, 2022
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We investigate causes of a poor-air-quality episode in northern Europe in October 2020 during which EU health limits for air quality were vastly exceeded. Such episodes may trigger measures to improve air quality. Analysis based on satellite observations, transport simulations, and surface observations revealed two sources of pollution. Emissions of mineral dust in Central Asia and biomass burning in Ukraine arrived almost simultaneously in Norway, and transport continued into the Arctic.
Adrien Deroubaix, Laurent Menut, Cyrille Flamant, Peter Knippertz, Andreas H. Fink, Anneke Batenburg, Joel Brito, Cyrielle Denjean, Cheikh Dione, Régis Dupuy, Valerian Hahn, Norbert Kalthoff, Fabienne Lohou, Alfons Schwarzenboeck, Guillaume Siour, Paolo Tuccella, and Christiane Voigt
Atmos. Chem. Phys., 22, 3251–3273, https://doi.org/10.5194/acp-22-3251-2022, https://doi.org/10.5194/acp-22-3251-2022, 2022
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During the summer monsoon in West Africa, pollutants emitted in urbanized areas modify cloud cover and precipitation patterns. We analyze these patterns with the WRF-CHIMERE model, integrating the effects of aerosols on meteorology, based on the numerous observations provided by the Dynamics-Aerosol-Climate-Interactions campaign. This study adds evidence to recent findings that increased pollution levels in West Africa delay the breakup time of low-level clouds and reduce precipitation.
Julia Schmale, Sangeeta Sharma, Stefano Decesari, Jakob Pernov, Andreas Massling, Hans-Christen Hansson, Knut von Salzen, Henrik Skov, Elisabeth Andrews, Patricia K. Quinn, Lucia M. Upchurch, Konstantinos Eleftheriadis, Rita Traversi, Stefania Gilardoni, Mauro Mazzola, James Laing, and Philip Hopke
Atmos. Chem. Phys., 22, 3067–3096, https://doi.org/10.5194/acp-22-3067-2022, https://doi.org/10.5194/acp-22-3067-2022, 2022
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Long-term data sets of Arctic aerosol properties from 10 stations across the Arctic provide evidence that anthropogenic influence on the Arctic atmospheric chemical composition has declined in winter, a season which is typically dominated by mid-latitude emissions. The number of significant trends in summer is smaller than in winter, and overall the pattern is ambiguous with some significant positive and negative trends. This reflects the mixed influence of natural and anthropogenic emissions.
Jenna C. Ditto, Jo Machesky, and Drew R. Gentner
Atmos. Chem. Phys., 22, 3045–3065, https://doi.org/10.5194/acp-22-3045-2022, https://doi.org/10.5194/acp-22-3045-2022, 2022
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We analyzed gases and aerosols sampled in summer and winter in a coastal region that is often downwind of urban areas and observed large contributions of nitrogen-containing organic compounds influenced by a mix of biogenic, anthropogenic, and/or marine sources as well as photochemical and aqueous-phase atmospheric processes. The results show the prevalence of key reduced and oxidized nitrogen functional groups and advance knowledge on the chemical structure of nitrogen-containing compounds.
Yanhong Zhu, Weijun Li, Yue Wang, Jian Zhang, Lei Liu, Liang Xu, Jingsha Xu, Jinhui Shi, Longyi Shao, Pingqing Fu, Daizhou Zhang, and Zongbo Shi
Atmos. Chem. Phys., 22, 2191–2202, https://doi.org/10.5194/acp-22-2191-2022, https://doi.org/10.5194/acp-22-2191-2022, 2022
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The solubilities of iron in fine particles in a megacity in Eastern China were studied under haze, fog, dust, clear, and rain weather conditions. For the first time, a receptor model was used to quantify the sources of dissolved and total iron aerosol. Microscopic analysis further confirmed the aging of iron aerosol during haze and fog conditions that facilitated dissolution of insoluble iron.
Constance Keitumetse Segakweng, Pieter Gideon van Zyl, Cathy Liousse, Johan Paul Beukes, Jan-Stefan Swartz, Eric Gardrat, Maria Dias-Alves, Brigitte Language, Roelof P. Burger, and Stuart J. Piketh
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2021-1026, https://doi.org/10.5194/acp-2021-1026, 2022
Revised manuscript accepted for ACP
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A detailed size-resolved assessment of the chemical characteristics of outdoor and indoor aerosols collected in low-income urban settlements in South Africa indicated the significance of household combustion for cooking and space heating – an important source of pollutants in the developing world – to atmospheric chemical composition, while the regional impacts of industrial sources in the highly industrialised and densely populated north-eastern interior of South Africa were also evident.
Baoshuang Liu, Yanyang Wang, He Meng, Qili Dai, Liuli Diao, Jianhui Wu, Laiyuan Shi, Jing Wang, Yufen Zhang, and Yinchang Feng
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2021-957, https://doi.org/10.5194/acp-2021-957, 2022
Revised manuscript accepted for ACP
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Understanding effectiveness of air pollution regulatory measures is critical for control policy formulation. A machine learning and dispersion normalized approaches were applied to decouple meteorological deduced variations in Qingdao, China. Most pollutant concentrations decreased substantially after the Clean Air Action. Largest emission reduction was from coal combustions and steel-related smelting. Qingdao risks increased emissions from the increased vehicular population and ozone pollution.
Yating Gao, Dihui Chen, Yanjie Shen, Yang Gao, Huiwang Gao, and Xiaohong Yao
Atmos. Chem. Phys., 22, 1515–1528, https://doi.org/10.5194/acp-22-1515-2022, https://doi.org/10.5194/acp-22-1515-2022, 2022
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This study focuses on spatiotemporal heterogeneity of observed gaseous amines, NH3, their particulate counterparts in PM2.5 over different sea zones, and the disproportional release of alkaline gases and corresponding particulate counterparts from seawater in the sea zones in terms of different extents of enrichment of TMAH+ and DMAH+ in the sea surface microlayer (SML). A novel hypothesis is delivered.
Johannes Passig, Julian Schade, Robert Irsig, Thomas Kröger-Badge, Hendryk Czech, Thomas Adam, Henrik Fallgren, Jana Moldanova, Martin Sklorz, Thorsten Streibel, and Ralf Zimmermann
Atmos. Chem. Phys., 22, 1495–1514, https://doi.org/10.5194/acp-22-1495-2022, https://doi.org/10.5194/acp-22-1495-2022, 2022
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The single-particle distribution of health-relevant polycyclic aromatic hydrocarbons (PAHs) was studied at the Swedish coast in autumn. We found PAHs bound to long-range transported particles from eastern and central Europe and also from ship emissions and local sources. This is the first field study using a new technology revealing single-particle data from both inorganic components and PAHs. We discuss PAH profiles that are indicative of several sources and atmospheric aging processes.
Md. Mozammel Haque, Yanlin Zhang, Srinivas Bikkina, Meehye Lee, and Kimitaka Kawamura
Atmos. Chem. Phys., 22, 1373–1393, https://doi.org/10.5194/acp-22-1373-2022, https://doi.org/10.5194/acp-22-1373-2022, 2022
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We attempt to understand the current state of East Asian organic aerosols with both the molecular marker approach and 14° C data of carbonaceous components. A significant positive correlation of nonfossil- and fossil-derived organic carbon with levoglucosan suggests the importance of biomass burning (BB) and coal combustion sources in the East Asian outflow. Thus, attribution of ambient levoglucosan levels over the western North Pacific to the impact of BB emission may cause large uncertainty.
Jing Cai, Cheng Wu, Jiandong Wang, Wei Du, Feixue Zheng, Simo Hakala, Xiaolong Fan, Biwu Chu, Lei Yao, Zemin Feng, Yongchun Liu, Yele Sun, Jun Zheng, Chao Yan, Federico Bianchi, Markku Kulmala, Claudia Mohr, and Kaspar R. Daellenbach
Atmos. Chem. Phys., 22, 1251–1269, https://doi.org/10.5194/acp-22-1251-2022, https://doi.org/10.5194/acp-22-1251-2022, 2022
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This study investigates the connection between organic aerosol (OA) molecular composition and particle absorptive properties in autumn in Beijing. We find that the molecular properties of OA compounds in different episodes influence particle light absorption properties differently: the light absorption enhancement of black carbon and light absorption coefficient of brown carbon were mostly related to more oxygenated OA (low C number and four O atoms) and aromatics/nitro-aromatics, respectively.
Jessica M. Burger, Julie Granger, Emily Joyce, Meredith G. Hastings, Kurt A. M. Spence, and Katye E. Altieri
Atmos. Chem. Phys., 22, 1081–1096, https://doi.org/10.5194/acp-22-1081-2022, https://doi.org/10.5194/acp-22-1081-2022, 2022
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The nitrogen (N) isotopic composition of atmospheric nitrate in the Southern Ocean (SO) marine boundary layer (MBL) reveals the importance of oceanic alkyl nitrate emissions as a source of reactive N to the atmosphere. The oxygen isotopic composition suggests peroxy radicals contribute up to 63 % to NO oxidation and that nitrate forms via the OH pathway. This work improves our understanding of reactive N sources and cycling in a remote marine region, a proxy for the pre-industrial atmosphere.
Dongwook Kim, Changmin Cho, Seokhan Jeong, Soojin Lee, Benjamin A. Nault, Pedro Campuzano-Jost, Douglas A. Day, Jason C. Schroder, Jose L. Jimenez, Rainer Volkamer, Donald R. Blake, Armin Wisthaler, Alan Fried, Joshua P. DiGangi, Glenn S. Diskin, Sally E. Pusede, Samuel R. Hall, Kirk Ullmann, L. Gregory Huey, David J. Tanner, Jack Dibb, Christoph J. Knote, and Kyung-Eun Min
Atmos. Chem. Phys., 22, 805–821, https://doi.org/10.5194/acp-22-805-2022, https://doi.org/10.5194/acp-22-805-2022, 2022
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CHOCHO was simulated using a 0-D box model constrained by measurements during the KORUS-AQ mission. CHOCHO concentration was high in large cities, aromatics being the most important precursors. Loss path to aerosol was the highest sink, contributing to ~ 20 % of secondary organic aerosol formation. Our work highlights that simple CHOCHO surface uptake approach is valid only for low aerosol conditions and more work is required to understand CHOCHO solubility in high-aerosol conditions.
Marco Wietzoreck, Marios Kyprianou, Benjamin A. Musa Bandowe, Siddika Celik, John N. Crowley, Frank Drewnick, Philipp Eger, Nils Friedrich, Minas Iakovides, Petr Kukučka, Jan Kuta, Barbora Nežiková, Petra Pokorná, Petra Přibylová, Roman Prokeš, Roland Rohloff, Ivan Tadic, Sebastian Tauer, Jake Wilson, Hartwig Harder, Jos Lelieveld, Ulrich Pöschl, Euripides G. Stephanou, and Gerhard Lammel
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2022-32, https://doi.org/10.5194/acp-2022-32, 2022
Revised manuscript accepted for ACP
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A unique dataset of concentrations and sources of PAHs and their alkylated, oxygenated and nitrated derivatives, in total 74 individual species, in the marine atmosphere is presented. Exposure to these substances poses a major health risk. We found very low concentrations over the Arabian Sea, while both local and long-range transported pollution caused elevated levels over the Mediterranean Sea and the Arabian Gulf.
Juanjuan Qin, Jihua Tan, Xueming Zhou, Yanrong Yang, Yuanyuan Qin, Xiaobo Wang, Shaoxuan Shi, Kang Xiao, and Xinming Wang
Atmos. Chem. Phys., 22, 465–479, https://doi.org/10.5194/acp-22-465-2022, https://doi.org/10.5194/acp-22-465-2022, 2022
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Water-soluble organic compounds (WSOCs) play important roles in atmospheric particle formation, migration, and transformation processes. In this work, size-segregated atmospheric particles were collected in a rural area of Beijing, and 3D fluorescence spectroscopy was used to investigate the optical properties of WSOCs as a means of inferring information about their atmospheric sources. It was found that these data could efficiently reveal the secondary transformation processes of WSOCs.
Guangjie Zheng, Hang Su, Siwen Wang, Andrea Pozzer, and Yafang Cheng
Atmos. Chem. Phys., 22, 47–63, https://doi.org/10.5194/acp-22-47-2022, https://doi.org/10.5194/acp-22-47-2022, 2022
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The recently proposed multiphase buffer theory provides a framework to reconstruct long-term trends and spatial variations in aerosol pH, while non-ideality is a major limitation for its broad applications. Here we proposed a parameterization method to estimate the impact of non-ideality and validated it against long-term observations and global simulations. With this method, the multiphase buffer theory can reproduce well aerosol pH variations estimated by comprehensive thermodynamic models.
Lingling Xu, Jiayan Shi, Yuping Chen, Yanru Zhang, Mengrong Yang, Yanting Chen, Liqian Yin, Lei Tong, Hang Xiao, and Jinsheng Chen
Atmos. Chem. Phys., 21, 18543–18555, https://doi.org/10.5194/acp-21-18543-2021, https://doi.org/10.5194/acp-21-18543-2021, 2021
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Mercury (Hg) isotopic compositions in aerosols are the mixed results of emission sources and atmospheric processes. This study presents Hg isotopic compositions in PM2.5 from different types of locations and total Hg from offshore surface seawater. The results indicate that atmospheric transformations induce significant mass independent fractionation of Hg isotopes, which obscures Hg isotopic signatures of initial emissions.
Michael A. Battaglia Jr., Nicholas Balasus, Katherine Ball, Vanessa Caicedo, Ruben Delgado, Annmarie G. Carlton, and Christopher J. Hennigan
Atmos. Chem. Phys., 21, 18271–18281, https://doi.org/10.5194/acp-21-18271-2021, https://doi.org/10.5194/acp-21-18271-2021, 2021
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This study characterizes aerosol liquid water content and aerosol pH at a land–water transition site near Baltimore, Maryland. We characterize the effects of unique meteorology associated with the close proximity to the Chesapeake Bay and episodic NH3 events derived from industrial and agricultural sources on aerosol chemistry during the summer. We also examine two events where primary Bay emissions underwent aging in the polluted urban atmosphere.
Nabil Deabji, Khanneh Wadinga Fomba, Souad El Hajjaji, Abdelwahid Mellouki, Laurent Poulain, Sebastian Zeppenfeld, and Hartmut Herrmann
Atmos. Chem. Phys., 21, 18147–18174, https://doi.org/10.5194/acp-21-18147-2021, https://doi.org/10.5194/acp-21-18147-2021, 2021
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Mountain and high-altitude sites provide representative data for the lower free troposphere, various pathways for aerosol interactions, and changing boundary layer heights useful in understanding atmospheric composition. However, only few studies exist in African regions despite diversity in both natural and anthropogenic emissions. This study provides detailed atmospheric studies in the northern African high-altitude region.
Jay M. Tomlin, Kevin A. Jankowski, Daniel P. Veghte, Swarup China, Peiwen Wang, Matthew Fraund, Johannes Weis, Guangjie Zheng, Yang Wang, Felipe Rivera-Adorno, Shira Raveh-Rubin, Daniel A. Knopf, Jian Wang, Mary K. Gilles, Ryan C. Moffet, and Alexander Laskin
Atmos. Chem. Phys., 21, 18123–18146, https://doi.org/10.5194/acp-21-18123-2021, https://doi.org/10.5194/acp-21-18123-2021, 2021
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Analysis of individual atmospheric particles shows that aerosol transported from North America during meteorological dry intrusion episodes may have a substantial impact on the mixing state and particle-type population over the mid-Atlantic, as organic contribution and particle-type diversity are significantly enhanced during these periods. These observations need to be considered in current atmospheric models.
Qi En Zhong, Chunlei Cheng, Zaihua Wang, Lei Li, Mei Li, Dafeng Ge, Lei Wang, Yuanyuan Li, Wei Nie, Xuguang Chi, Aijun Ding, Suxia Yang, Duohong Chen, and Zhen Zhou
Atmos. Chem. Phys., 21, 17953–17967, https://doi.org/10.5194/acp-21-17953-2021, https://doi.org/10.5194/acp-21-17953-2021, 2021
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Particulate amines play important roles in new particle formation, aerosol acidity, and hygroscopicity. Most of the field observations did not distinguish the different behavior of each type amine under the same ambient influencing factors. In this study, two amine-containing single particles exhibited different mixing states and disparate enrichment of secondary organics, which provide insight into the discriminated fates of organics during the formation and evolution processes.
Liang Xu, Xiaohuan Liu, Huiwang Gao, Xiaohong Yao, Daizhou Zhang, Lei Bi, Lei Liu, Jian Zhang, Yinxiao Zhang, Yuanyuan Wang, Qi Yuan, and Weijun Li
Atmos. Chem. Phys., 21, 17715–17726, https://doi.org/10.5194/acp-21-17715-2021, https://doi.org/10.5194/acp-21-17715-2021, 2021
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We quantified different types of marine aerosols and explored the Cl depletion of sea salt aerosol (SSA) in the eastern China seas and the northwestern Pacific Ocean. We found that anthropogenic acidic gases in the troposphere were transported longer distances compared to the anthropogenic aerosols and could significantly impact remote marine aerosols. Meanwhile, variations of chloride depletion in SSA can serve as a potential indicator for anthropogenic gaseous pollutants in remote marine air.
Jie Tian, Qiyuan Wang, Huikun Liu, Yongyong Ma, Suixin Liu, Yong Zhang, Weikang Ran, Yongming Han, and Junji Cao
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2021-947, https://doi.org/10.5194/acp-2021-947, 2021
Revised manuscript accepted for ACP
Short summary
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We investigated aerosol optical properties and direct radiative effect (DRE) at an urban site in China before and during the Coronavirus Disease 2019 lockdown. The total light extinction coefficient (bext) reduced under emission control measures, however, bext from biomass burning increased due to the undiminished needs of residential cooking and heating. Biomass burning became the largest positive effect contributor to aerosol DRE in the lockdown instead of traffic-related emission.
Jean-Eudes Petit, Jean-Charles Dupont, Olivier Favez, Valérie Gros, Yunjiang Zhang, Jean Sciare, Leila Simon, François Truong, Nicolas Bonnaire, Tanguy Amodeo, Robert Vautard, and Martial Haeffelin
Atmos. Chem. Phys., 21, 17167–17183, https://doi.org/10.5194/acp-21-17167-2021, https://doi.org/10.5194/acp-21-17167-2021, 2021
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The COVID-19 outbreak led to lockdowns at national scales in spring 2020. Large cuts in emissions occurred, but the quantitative assessment of their role from observations is hindered by weather and interannual variability. That is why we developed an innovative methodology in order to best characterize the impact of lockdown on atmospheric chemistry. We find that a local decrease in traffic-related pollutants triggered a decrease of secondary aerosols and an increase in ozone.
Alexander A. T. Bui, Henry W. Wallace, Sarah Kavassalis, Hariprasad D. Alwe, James H. Flynn, Matt H. Erickson, Sergio Alvarez, Dylan B. Millet, Allison L. Steiner, and Robert J. Griffin
Atmos. Chem. Phys., 21, 17031–17050, https://doi.org/10.5194/acp-21-17031-2021, https://doi.org/10.5194/acp-21-17031-2021, 2021
Short summary
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Differences in atmospheric species above and below a forest canopy provide insight into the relative importance of local mixing, long-range transport, and chemical processes in determining vertical gradients in atmospheric particles in a forested environment. This helps in understanding the flux of climate-relevant material out of the forest to the atmosphere. We studied this in a remote forest using vertically resolved measurements of gases and particles.
Sharmine Akter Simu, Yuzo Miyazaki, Eri Tachibana, Henning Finkenzeller, Jérôme Brioude, Aurélie Colomb, Olivier Magand, Bert Verreyken, Stephanie Evan, Rainer Volkamer, and Trissevgeni Stavrakou
Atmos. Chem. Phys., 21, 17017–17029, https://doi.org/10.5194/acp-21-17017-2021, https://doi.org/10.5194/acp-21-17017-2021, 2021
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The tropical Indian Ocean (IO) is expected to be a significant source of water-soluble organic carbon (WSOC), which is relevant to cloud formation. Our study showed that marine secondary organic formation dominantly contributed to the aerosol WSOC mass at the high-altitude observatory in the southwest IO in the wet season in both marine boundary layer and free troposphere (FT). This suggests that the effect of marine secondary sources is important up to FT, a process missing in climate models.
Larissa Lacher, Hans-Christian Clemen, Xiaoli Shen, Stephan Mertes, Martin Gysel-Beer, Alireza Moallemi, Martin Steinbacher, Stephan Henne, Harald Saathoff, Ottmar Möhler, Kristina Höhler, Thea Schiebel, Daniel Weber, Jann Schrod, Johannes Schneider, and Zamin A. Kanji
Atmos. Chem. Phys., 21, 16925–16953, https://doi.org/10.5194/acp-21-16925-2021, https://doi.org/10.5194/acp-21-16925-2021, 2021
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We investigate ice-nucleating particle properties at Jungfraujoch during the 2017 joint INUIT/CLACE field campaign, to improve the knowledge about those rare particles in a cloud-relevant environment. By quantifying ice-nucleating particles in parallel to single-particle mass spectrometry measurements, we find that mineral dust and aged sea spray particles are potential candidates for ice-nucleating particles. Our findings are supported by ice residual analysis and source region modeling.
Cited articles
Alameda County: Alameda County Data Sharing Initiative, available at:
https://data.acgov.org/browse?category=GeospatialData&anonymous=true&q=street&sortBy=relevance
(last access: 5 February 2018), 2017. a
Apte, J. S., Marshall, J. D., Cohen, A. J., and Brauer, M.: Addressing Global
Mortality from Ambient PM2.5, Environ. Sci. Technol., 49,
8057–8066, https://doi.org/10.1021/acs.est.5b01236, 2015. a
Apte, J. S., Messier, K. P., Gani, S., Brauer, M., Kirchstetter, T. W., Lunden,
M. M., Marshall, J. D., Portier, C. J., Vermeulen, R. C. H., and Hamburg,
S. P.: High-Resolution Air Pollution Mapping with Google Street View Cars :
Exploiting Big Data, Environ. Sci. Technol., 51, 6999–7008,
https://doi.org/10.1021/acs.est.7b00891, 2017. a, b, c, d, e, f, g, h, i, j
Ban-Weiss, G. A., McLaughlin, J. P., Harley, R. A., Lunden, M. M.,
Kirchstetter, T. W., Kean, A. J., Strawa, A. W., Stevenson, E. D., and
Kendall, G. R.: Long-term changes in emissions of nitrogen oxides and
particulate matter from on-road gasoline and diesel vehicles, Atmos.
Environ., 42, 220–232, https://doi.org/10.1016/j.atmosenv.2007.09.049, 2008. a
Brantley, H. L., Hagler, G. S. W., Kimbrough, E. S., Williams, R. W.,
Mukerjee, S., and Neas, L. M.: Mobile air monitoring data-processing
strategies and effects on spatial air pollution trends, Atmos. Meas. Tech.,
7, 2169–2183, https://doi.org/10.5194/amt-7-2169-2014, 2014. a
Canagaratna, M. R., Onasch, T. B., Wood, E. C., Herndon, S. C., Jayne, J. T.,
Cross, E. S., Miake-Lye, R. C., Kolb, C. E., and Worsnop, D. R.: Evolution
of vehicle exhaust particles in the atmosphere, J. Air Waste Manage., 60,
1192–1203, https://doi.org/10.3155/1047-3289.60.10.1192, 2010. a, b
Canagaratna, M. R., Jimenez, J. L., Kroll, J. H., Chen, Q., Kessler, S. H.,
Massoli, P., Hildebrandt Ruiz, L., Fortner, E., Williams, L. R., Wilson, K.
R., Surratt, J. D., Donahue, N. M., Jayne, J. T., and Worsnop, D. R.:
Elemental ratio measurements of organic compounds using aerosol mass
spectrometry: characterization, improved calibration, and implications,
Atmos. Chem. Phys., 15, 253–272, https://doi.org/10.5194/acp-15-253-2015,
2015. a, b
CARB: California Air Resource Board (CARB): Final Regulation Order – Fuel
Sulfur and Other Operational Requirements for Ocean-Going Vessels Within
California Waters and 24 Nautical Miles of the California Baseline,
available at: https://www.arb.ca.gov/regact/2008/fuelogv08/fro13.pdf
(last access: 7 March 2018), 2009. a
CARB: California Air Resource Board (CARB): Overview of the Statewide
Drayage Truck Regulation, available at:
https://www.arb.ca.gov/msprog/onroad/porttruck/regfactsheet.pdf (last
access: 7 March 2018), 2011. a
Choi, W., He, M., Barbesant, V., Kozawa, K. H., Mara, S., Winer, A. M., and
Paulson, S. E.: Prevalence of wide area impacts downwind of freeways under
pre-sunrise stable atmospheric conditions, Atmos. Environ., 62,
318–327, https://doi.org/10.1016/j.atmosenv.2012.07.084, 2012. a
Crippa, M., El Haddad, I., Slowik, J. G., Decarlo, P. F., Mohr, C., Heringa,
M. F., Chirico, R., Marchand, N., Sciare, J., Baltensperger, U., and
Prévôt, A. S.: Identification of marine and continental aerosol
sources in Paris using high resolution aerosol mass spectrometry, J.
Geophys. Res.-Atmos., 118, 1950–1963, https://doi.org/10.1002/jgrd.50151,
2013a. a
Crippa, M., DeCarlo, P. F., Slowik, J. G., Mohr, C., Heringa, M. F., Chirico,
R., Poulain, L., Freutel, F., Sciare, J., Cozic, J., Di Marco, C. F.,
Elsasser, M., Nicolas, J. B., Marchand, N., Abidi, E., Wiedensohler, A.,
Drewnick, F., Schneider, J., Borrmann, S., Nemitz, E., Zimmermann, R.,
Jaffrezo, J.-L., Prévôt, A. S. H., and Baltensperger, U.: Wintertime
aerosol chemical composition and source apportionment of the organic fraction
in the metropolitan area of Paris, Atmos. Chem. Phys., 13, 961–981,
https://doi.org/10.5194/acp-13-961-2013, 2013b. a, b
Dallmann, T. R., Harley, R. A., and Kirchstetter, T. W.: Effects of diesel
particle filter retrofits and accelerated fleet turnover on drayage truck
emissions at the port of Oakland, Environ. Sci. Technol., 45,
10773–10779, https://doi.org/10.1021/es202609q, 2011. a, b, c, d
Decarlo, P. F., Kimmel, J. R., Trimborn, A., Northway, M., Jayne, J. T., Aiken,
A. C., Gonin, M., Fuhrer, K., Horvath, T., Docherty, K. S., Worsnop, D. R.,
and Jimenez, J. L.: Field-Deployable, High-Resolution, Time-of-Flight
Aerosol Mass Spectrometer, Anal. Chem., 78, 8281–8289,
https://doi.org/10.1021/ac061249n,
2006. a
DeCarlo, P. F., Ulbrich, I. M., Crounse, J., de Foy, B., Dunlea, E. J.,
Aiken, A. C., Knapp, D., Weinheimer, A. J., Campos, T., Wennberg, P. O., and
Jimenez, J. L.: Investigation of the sources and processing of organic
aerosol over the Central Mexican Plateau from aircraft measurements during
MILAGRO, Atmos. Chem. Phys., 10, 5257–5280,
https://doi.org/10.5194/acp-10-5257-2010, 2010. a, b
Docherty, K. S., Aiken, A. C., Huffman, J. A., Ulbrich, I. M., DeCarlo, P.
F., Sueper, D., Worsnop, D. R., Snyder, D. C., Peltier, R. E., Weber, R. J.,
Grover, B. D., Eatough, D. J., Williams, B. J., Goldstein, A. H., Ziemann, P.
J., and Jimenez, J. L.: The 2005 Study of Organic Aerosols at Riverside
(SOAR-1): instrumental intercomparisons and fine particle composition, Atmos.
Chem. Phys., 11, 12387–12420, https://doi.org/10.5194/acp-11-12387-2011,
2011. a
Donahue, N. M., Kroll, J. H., Pandis, S. N., and Robinson, A. L.: A
two-dimensional volatility basis set – Part 2: Diagnostics of
organic-aerosol evolution, Atmos. Chem. Phys., 12, 615–634,
https://doi.org/10.5194/acp-12-615-2012, 2012. a
Elser, M., Bozzetti, C., El-Haddad, I., Maasikmets, M., Teinemaa, E.,
Richter, R., Wolf, R., Slowik, J. G., Baltensperger, U., and Prévôt,
A. S. H.: Urban increments of gaseous and aerosol pollutants and their
sources using mobile aerosol mass spectrometry measurements, Atmos. Chem.
Phys., 16, 7117–7134, https://doi.org/10.5194/acp-16-7117-2016, 2016. a, b
Enroth, J., Saarikoski, S., Niemi, J., Kousa, A., Ježek, I., Močnik,
G., Carbone, S., Kuuluvainen, H., Rönkkö, T., Hillamo, R., and
Pirjola, L.: Chemical and physical characterization of traffic particles in
four different highway environments in the Helsinki metropolitan area, Atmos.
Chem. Phys., 16, 5497–5512, https://doi.org/10.5194/acp-16-5497-2016, 2016. a
Ferin, J., Oberdörster, G., and Penney, D. P.: Pulmonary Retention of
Ultrafine and Fine Particles in Rats, Am. J. Resp. Cell Mol., 6, 535–542,
https://doi.org/10.1165/ajrcmb/6.5.535, 1992. a
Finlayson-Pitts, B. J. and Pitts, J. N. (Eds.): Chemistry of Inorganic
Nitrogen Compounds, in: Chemistry of the Upper and Lower Atmosphere, chap. 7,
Academic Press, San Diego, 264–293, https://doi.org/10.1016/B978-012257060-5/50009-5,
2000. a
Fisher, J. B., Kelly, M., and Romm, J.: Scales of environmental justice:
Combining GIS and spatial analysis for air toxics in West Oakland,
California, Health Place, 12, 701–714,
https://doi.org/10.1016/j.healthplace.2005.09.005, 2006. a, b
Fujita, E. M., Campbell, D. E., Patrick Arnott, W., Lau, V., and Martien,
P. T.: Spatial variations of particulate matter and air toxics in
communities adjacent to the Port of Oakland, J. Air Waste
Manage., 63, 1399–1411, https://doi.org/10.1080/10962247.2013.824393, 2013. a
Ge, X., Setyan, A., Sun, Y., and Zhang, Q.: Primary and secondary organic
aerosols in Fresno, California during wintertime: Results from high
resolution aerosol mass spectrometry, J. Geophys. Res.-Atmos., 117, 1–15,
https://doi.org/10.1029/2012JD018026, 2012. a
Giuliano, G. and O'Brien, T.: Reducing port-related truck emissions: The
terminal gate appointment system at the Ports of Los Angeles and Long Beach,
Transport. Res. D-Tr. E., 12, 460–473,
https://doi.org/10.1016/j.trd.2007.06.004, 2007. a
Goldstein, A. H. and Galbally, I. E.: Known and unexplored organic
constituents in the earth's atmosphere, Environ. Sci.
Technol., 41, 1514–1521, https://doi.org/10.1021/es072476p, 2007. a
Gordon, T. D., Tkacik, D. S., Presto, A. A., Zhang, M., Jathar, S. H.,
Nguyen, N. T., Massetti, J., Truong, T., Cicero-Fernandez, P., Maddox, C.,
Rieger, P., Chattopadhyay, S., Maldonado, H., Maricq, M. M., and Robinson,
A. L.: Primary gas- and particle-phase emissions and secondary organic
aerosol production from gasoline and diesel off-road engines, Environ. Sci.
Technol., 47, 14137–14146, https://doi.org/10.1021/es403556e, 2013. a
Gu, P., Li, H. Z., Ye, Q., Robinson, E. S., Apte, J. S., Robinson, A. L., and
Presto, A. A.: Intracity Variability of Particulate Matter Exposure Is Driven
by Carbonaceous Sources and Correlated with Land-Use Variables, Environ. Sci.
Technol., 52, 11545–11554, https://doi.org/10.1021/acs.est.8b03833, 2018. a, b, c, d
Hallquist, M., Wenger, J. C., Baltensperger, U., Rudich, Y., Simpson, D.,
Claeys, M., Dommen, J., Donahue, N. M., George, C., Goldstein, A. H.,
Hamilton, J. F., Herrmann, H., Hoffmann, T., Iinuma, Y., Jang, M., Jenkin, M.
E., Jimenez, J. L., Kiendler-Scharr, A., Maenhaut, W., McFiggans, G., Mentel,
Th. F., Monod, A., Prévôt, A. S. H., Seinfeld, J. H., Surratt, J. D.,
Szmigielski, R., and Wildt, J.: The formation, properties and impact of
secondary organic aerosol: current and emerging issues, Atmos. Chem. Phys.,
9, 5155–5236, https://doi.org/10.5194/acp-9-5155-2009, 2009. a
Hayes, P. L., Ortega, A. M., Cubison, M. J., Froyd, K. D., Zhao, Y., Cliff,
S. S., Hu, W. W., Toohey, D. W., Flynn, J. H., Lefer, B. L., Grossberg, N.,
Alvarez, S., Rappenglück, B., Taylor, J. W., Allan, J. D., Holloway,
J. S., Gilman, J. B., Kuster, W. C., De Gouw, J. A., Massoli, P., Zhang,
X., Liu, J., Weber, R. J., Corrigan, A. L., Russell, L. M., Isaacman, G.,
Worton, D. R., Kreisberg, N. M., Goldstein, A. H., Thalman, R., Waxman,
E. M., Volkamer, R., Lin, Y. H., Surratt, J. D., Kleindienst, T. E.,
Offenberg, J. H., Dusanter, S., Griffith, S., Stevens, P. S., Brioude, J.,
Angevine, W. M., and Jimenez, J. L.: Organic aerosol composition and sources
in Pasadena, California, during the 2010 CalNex campaign, J.
Geophys. Res.-Atmos., 118, 9233–9257, https://doi.org/10.1002/jgrd.50530, 2013. a, b, c, d
Hildebrandt, L., Engelhart, G. J., Mohr, C., Kostenidou, E., Lanz, V. A.,
Bougiatioti, A., DeCarlo, P. F., Prevot, A. S. H., Baltensperger, U.,
Mihalopoulos, N., Donahue, N. M., and Pandis, S. N.: Aged organic aerosol in
the Eastern Mediterranean: the Finokalia Aerosol Measurement Experiment –
2008, Atmos. Chem. Phys., 10, 4167–4186,
https://doi.org/10.5194/acp-10-4167-2010, 2010. a
Hu, W., Hu, M., Hu, W., Jimenez, J. L., Yuan, B., Chen, W., Wang, M., Wu, Y.,
Chen, C., Wang, Z., Peng, Z., Zeng, L., and Shao, M.: Chemical composition,
sources, and aging process of submicron aerosols in Beijing: Contrast between
summer and winter, J. Geophys. Res.-Atmos., 121, 1955–1977,
https://doi.org/10.1002/2015JD024020, 2016. a
Jayne, J. T., Leard, D. C., Zhang, X. F., Davidovits, P., Smith, K. A., Kolb,
C. E., and Worsnop, D. R.: Development of an aerosol mass spectrometer for
size and composition analysis of submicron particles, Aerosol Sci.
Tech., 33, 49–70, https://doi.org/10.1080/027868200410840, 2000. a
Jimenez, J. L., Canagaratna, M. R., Donahue, N. M., Prevot, A. S. H., Zhang,
Q., Kroll, J. H., DeCarlo, P. F., Allan, J. D., Coe, H., Ng, N. L., Aiken,
A. C., Docherty, K. S., Ulbrich, I. M., Grieshop, A. P., Robinson, A. L.,
Duplissy, J., Smith, J. D., Wilson, K. R., Lanz, V. A., Hueglin, C., Sun,
Y. L., Tian, J., Laaksonen, A., Raatikainen, T., Rautiainen, J., Vaattovaara,
P., Ehn, M., Kulmala, M., Tomlinson, J. M., Collins, D. R., Cubison, M. J.,
Dunlea, E. J., Huffman, J. A., Onasch, T. B., Alfarra, M. R., Williams,
P. I., Bower, K., Kondo, Y., Schneider, J., Drewnick, F., Borrmann, S.,
Weimer, S., Demerjian, K., Salcedo, D., Cottrell, L., Griffin, R., Takami,
A., Miyoshi, T., Hatakeyama, S., Shimono, A., Sun, J. Y., Zhang, Y. M.,
Dzepina, K., Kimmel, J. R., Sueper, D., Jayne, J. T., Herndon, S. C.,
Trimborn, A. M., Williams, L. R., Wood, E. C., Middlebrook, A. M., Kolb,
C. E., Baltensperger, U., and Worsnop, D. R.: Evolution of organic aerosols
in the atmosphere, Science, 326, 1525–1529, https://doi.org/10.1126/science.1180353,
2009. a, b
Kaltsonoudis, C., Kostenidou, E., Louvaris, E., Psichoudaki, M.,
Tsiligiannis, E., Florou, K., Liangou, A., and Pandis, S. N.:
Characterization of fresh and aged organic aerosol emissions from meat
charbroiling, Atmos. Chem. Phys., 17, 7143–7155,
https://doi.org/10.5194/acp-17-7143-2017, 2017. a
Kroll, J. H., Donahue, N. M., Jimenez, J. L., Kessler, S. H., Canagaratna,
M. R., Wilson, K. R., Altieri, K. E., Mazzoleni, L. R., Wozniak, A. S.,
Bluhm, H., Mysak, E. R., Smith, J. D., Kolb, C. E., and Worsnop, D. R.:
Carbon oxidation state as a metric for describing the chemistry of
atmospheric organic aerosol, Nat. Chem., 3, 133–139,
https://doi.org/10.1038/nchem.948,
2011. a
Lee, B. P., Li, Y. J., Yu, J. Z., Louie, P. K. K., and Chan, C. K.:
Characteristics of submicron particulate matter at the urban roadside in
downtown Hong Kong – Overview of 4 months of continuous high-resolution
aerosol mass spectrometer measurements, J. Geophys. Res.-Atmos., 120,
7040–7058, https://doi.org/10.1002/2015JD023311, 2015. a
Li, H. Z., Dallmann, T. R., Gu, P., and Presto, A. A.: Application of mobile
sampling to investigate spatial variation in fine particle composition,
Atmos. Environ., 142, 71–82, https://doi.org/10.1016/j.atmosenv.2016.07.042, 2016. a
Li, H. Z., Dallmann, T. R., Li, X., Gu, P., and Presto, A. A.: Urban Organic
Aerosol Exposure: Spatial Variations in Composition and Source Impacts,
Environ. Sci. Technol., 52, 415–426, https://doi.org/10.1021/acs.est.7b03674, 2018. a, b
Li, X., Dallmann, T. R., May, A. A., Tkacik, D. S., Lambe, A. T., Jayne, J. T.,
Croteau, P. L., and Presto, A. A.: Gas-Particle Partitioning of Vehicle
Emitted Primary Organic Aerosol Measured in a Traffic Tunnel, Environ.
Sci. Technol., 50, 12146–12155, https://doi.org/10.1021/acs.est.6b01666,
2016. a
Liu, J., Chu, B., Chen, T., Liu, C., Wang, L., Bao, X., and He, H.:
Secondary Organic Aerosol Formation from Ambient Air at an Urban Site in
Beijing: Effects of OH Exposure and Precursor Concentrations, Environ. Sci.
Technol., 52, 6834–6841, https://doi.org/10.1021/acs.est.7b05701, 2018. a
May, A. A., Nguyen, N. T., Presto, A. A., Gordon, T. D., Lipsky, E. M., Karve,
M., Gutierrez, A., Robertson, W. H., Zhang, M., Brandow, C., Chang, O., Chen,
S., Cicero-Fernandez, P., Dinkins, L., Fuentes, M., Huang, S. M., Ling, R.,
Long, J., Maddox, C., Massetti, J., McCauley, E., Miguel, A., Na, K., Ong,
R., Pang, Y., Rieger, P., Sax, T., Truong, T., Vo, T., Chattopadhyay, S.,
Maldonado, H., Maricq, M. M., and Robinson, A. L.: Gas- and particle-phase
primary emissions from in-use, on-road gasoline and diesel vehicles,
Atmos. Environ., 88, 247–260, https://doi.org/10.1016/j.atmosenv.2014.01.046, 2014. a, b
Middlebrook, A. M., Bahreini, R., Jimenez, J. L., and Canagaratna, M. R.:
Evaluation of Composition-Dependent Collection Efficiencies for the Aerodyne
Aerosol Mass Spectrometer using Field Data, Aerosol Sci. Tech.,
46, 258–271, https://doi.org/10.1080/02786826.2011.620041, 2012. a
Miyakawa, T., Takegawa, N., and Kondo, Y.: Removal of sulfur dioxide and
formation of sulfate aerosol in Tokyo, J. Geophys. Res.-Atmos., 112, 1–13,
https://doi.org/10.1029/2006JD007896, 2007. a
Mohr, C., Huffman, J. A., Cubison, M. J., Aiken, A. C., Docherty, K. S.,
Kimmel, J. R., Ulbrich, I. M., Hannigan, M., and Jimenez, J. L.:
Characterization of primary organic aerosol emissions from meat cooking,
trash burning, and motor vehicles with high-resolution aerosol mass
spectrometry and comparison with ambient and chamber observations,
Environ. Sci. Technol., 43, 2443–2449,
https://doi.org/10.1021/es8011518,
2009. a
Mohr, C., DeCarlo, P. F., Heringa, M. F., Chirico, R., Slowik, J. G.,
Richter, R., Reche, C., Alastuey, A., Querol, X., Seco, R., Peñuelas, J.,
Jiménez, J. L., Crippa, M., Zimmermann, R., Baltensperger, U., and
Prévôt, A. S. H.: Identification and quantification of organic
aerosol from cooking and other sources in Barcelona using aerosol mass
spectrometer data, Atmos. Chem. Phys., 12, 1649–1665,
https://doi.org/10.5194/acp-12-1649-2012, 2012. a, b, c
Mohr, C., DeCarlo, P. F., Heringa, M. F., Chirico, R., Richter, R., Crippa, M.,
Querol, X., Baltensperger, U., and Prevot, A. S. H.: Spatial Variation of
Aerosol Chemical Composition and Organic Components Identified by Positive
Matrix Factorization in the Barcelona Region, Environ. Sci.
Technol., 49, 10421–10430, https://doi.org/10.1021/acs.est.5b02149, 2015. a, b, c, d, e
Myhre, G., Samset, B. H., Schulz, M., Balkanski, Y., Bauer, S., Berntsen, T.
K., Bian, H., Bellouin, N., Chin, M., Diehl, T., Easter, R. C., Feichter, J.,
Ghan, S. J., Hauglustaine, D., Iversen, T., Kinne, S., Kirkevåg, A.,
Lamarque, J.-F., Lin, G., Liu, X., Lund, M. T., Luo, G., Ma, X., van Noije,
T., Penner, J. E., Rasch, P. J., Ruiz, A., Seland, Ø., Skeie, R. B.,
Stier, P., Takemura, T., Tsigaridis, K., Wang, P., Wang, Z., Xu, L., Yu, H.,
Yu, F., Yoon, J.-H., Zhang, K., Zhang, H., and Zhou, C.: Radiative forcing of
the direct aerosol effect from AeroCom Phase II simulations, Atmos. Chem.
Phys., 13, 1853–1877, https://doi.org/10.5194/acp-13-1853-2013, 2013. a
Ng, N. L., Canagaratna, M. R., Jimenez, J. L., Chhabra, P. S., Seinfeld, J.
H., and Worsnop, D. R.: Changes in organic aerosol composition with aging
inferred from aerosol mass spectra, Atmos. Chem. Phys., 11, 6465–6474,
https://doi.org/10.5194/acp-11-6465-2011, 2011. a, b
Novakov, T., Chang, S. G., and Harker, A. B.: Sulfates as pollution
particulates: Catalytic formation on carbon (soot) particles, Science, 186,
259–261, https://doi.org/10.1126/science.186.4160.259, 1974. a
Oberdörster, G.: Toxicology of ultrafine particles: in vivo studies,
Philos. T. Roy. Soc. A, 358, 2719–2740, https://doi.org/10.1098/rsta.2000.0680, 2000. a
Ortega, A. M., Hayes, P. L., Peng, Z., Palm, B. B., Hu, W., Day, D. A., Li,
R., Cubison, M. J., Brune, W. H., Graus, M., Warneke, C., Gilman, J. B.,
Kuster, W. C., de Gouw, J., Gutiérrez-Montes, C., and Jimenez, J. L.:
Real-time measurements of secondary organic aerosol formation and aging from
ambient air in an oxidation flow reactor in the Los Angeles area, Atmos.
Chem. Phys., 16, 7411–7433, https://doi.org/10.5194/acp-16-7411-2016, 2016. a, b, c
Paatero, P.: User's guide for positive matrix factorization programs PMF2.exe
and PMF3.exe, University of Helsinki, Helsinki, Finland, 2007. a
Paatero, P. and Tapper, U.: Positive matrix factorization: A non-negative
factor model with optimal utilization of error estimates of data values,
Environmetrics, 5, 111–126, https://doi.org/10.1002/env.3170050203, 1994. a, b, c
Preble, C. V., Dallmann, T. R., Kreisberg, N. M., Hering, S. V., Harley, R. A.,
and Kirchstetter, T. W.: Effects of Particle Filters and Selective Catalytic
Reduction on Heavy-Duty Diesel Drayage Truck Emissions at the Port of
Oakland, Environ. Sci. Technol., 49, 8864–8871,
https://doi.org/10.1021/acs.est.5b01117, 2015. a, b, c, d, e
Preble, C. V., Cados, T. E., Harley, R. A., and Kirchstetter, T. W.: In-Use
Performance and Durability of Particle Filters on Heavy-Duty Diesel Trucks,
Environ. Sci. Technol., 52, 11913–11921, https://doi.org/10.1021/acs.est.8b02977,
2018. a, b
Presto, A. A.: Center for Air Climate and Energy Solutions (CACES) Air
Quality Observatory, https://doi.org/10.1184/R1/c.4273859, 2018. a
Presto, A. A., Gordon, T. D., and Robinson, A. L.: Primary to secondary
organic aerosol: evolution of organic emissions from mobile combustion
sources, Atmos. Chem. Phys., 14, 5015–5036,
https://doi.org/10.5194/acp-14-5015-2014, 2014. a
Robinson, A. L., Donahue, N. M., Shrivastava, M. K., Weitkamp, E. A., Sage,
A. M., Grieshop, A. P., Lane, T. E., Pierce, J. R., and Pandis, S. N.:
Rethinking organic aerosols: Semivolatile emissions and photochemical
aging, Science, 315, 1259–1262, https://doi.org/10.1126/science.1133061, 2007. a
Robinson, E. S., Gu, P., Ye, Q., Li, H. Z., Shah, R. U., Apte, J. S.,
Robinson, A. L., and Presto, A. A.: Restaurant Impacts on Outdoor Air
Quality: Elevated Organic Aerosol Mass from Restaurant Cooking with
Neighborhood-Scale Plume Extents, Environ. Sci. Technol., 52, 9285–9294,
2018. a
Saha, P. K., Khlystov, A., Snyder, M. G., and Grieshop, A. P.:
Characterization of air pollutant concentrations, fleet emission factors,
and dispersion near a North Carolina interstate freeway across two seasons,
Atmos. Environ., 177, 143–153, https://doi.org/10.1016/j.atmosenv.2018.01.019,
2018a. a, b, c
Saha, P. K., Khlystov, A., and Grieshop, A. P.: Downwind evolution of the
volatility and mixing state of near-road aerosols near a US interstate
highway, Atmos. Chem. Phys., 18, 2139–2154, https://doi.org/10.5194/acp-18-2139-2018,
2018b. a
Saliba, G., Saleh, R., Zhao, Y., Presto, A. A., Lambe, A. T., Frodin, B.,
Sardar, S., Maldonado, H., Maddox, C., May, A. A., Drozd, G. T., Goldstein,
A. H., Russell, L. M., Hagen, F., and Robinson, A. L.: Comparison of
Gasoline Direct-Injection (GDI) and Port Fuel Injection (PFI) Vehicle
Emissions: Emission Certification Standards, Cold-Start, Secondary Organic
Aerosol Formation Potential, and Potential Climate Impacts, Environ.
Sci. Technol., 51, 6542–6552, https://doi.org/10.1021/acs.est.6b06509, 2017. a
Seinfeld, J. and Pandis, S. N.: Atmospheric Chemistry and Physics: From Air
Pollution to Climate Change, chap. 21, Sect. 26.2, 2 edn., John Wiley and Sons,
Inc., New York, USA, 2006. a
Stölzel, M., Breitner, S., Cyrys, J., Pitz, M., Wölke, G.,
Kreyling, W., Heinrich, J., Wichmann, H. E., and Peters, A.: Daily mortality
and particulate matter in different size classes in Erfurt, Germany, J.
Expo. Sci. Env. Epi., 17, 458–467, https://doi.org/10.1038/sj.jes.7500538, 2007. a
Stutz, J., Kim, E. S., Platt, U., Bruno, P., Perrino, C., and Febo, A.:
UV-visible absorption cross sections of nitrous acid, J.
Geophys. Res.-Atmos., 105, 14585–14592,
https://doi.org/10.1029/2000JD900003, 2000. a
Sueper, D., Allan, J. D., Dunlea, E., Crosier, J., Kimmel, J. R., DeCarlo,
P. F., Aiken, A. C., and Jimenez, J. L.: A Community Software for Quality
Control and Analysis of Data from the Aerodyne Time-of-Flight Aerosol Mass
Spectrometers (ToF-AMS), Tech. rep., Reno, NV, USA, 2007. a
Sun, Y.-L., Zhang, Q., Schwab, J. J., Demerjian, K. L., Chen, W.-N., Bae,
M.-S., Hung, H.-M., Hogrefe, O., Frank, B., Rattigan, O. V., and Lin, Y.-C.:
Characterization of the sources and processes of organic and inorganic
aerosols in New York city with a high-resolution time-of-flight aerosol mass
apectrometer, Atmos. Chem. Phys., 11, 1581–1602,
https://doi.org/10.5194/acp-11-1581-2011, 2011. a
Tsigaridis, K., Krol, M., Dentener, F. J., Balkanski, Y., Lathière, J.,
Metzger, S., Hauglustaine, D. A., and Kanakidou, M.: Change in global aerosol
composition since preindustrial times, Atmos. Chem. Phys., 6, 5143–5162,
https://doi.org/10.5194/acp-6-5143-2006, 2006. a
Ulbrich, I. M., Canagaratna, M. R., Zhang, Q., Worsnop, D. R., and Jimenez,
J. L.: Interpretation of organic components from Positive Matrix
Factorization of aerosol mass spectrometric data, Atmos. Chem. Phys., 9,
2891–2918, https://doi.org/10.5194/acp-9-2891-2009, 2009. a, b, c, d
United Nations: World Urbanization Prospects, Tech. rep., United
Nations, Department of Economic and Social Affairs,
https://doi.org/10.4054/DemRes.2005.12.9, 2014. a
US Census: US Census Bureau Reporter – Oakland, CA, available at:
https://censusreporter.org/profiles/16000US0653000-oakland-ca/ (last
access: 5 February 2018), 2016. a
Van den Bossche, J., Peters, J., Verwaeren, J., Botteldooren, D., Theunis,
J., and De Baets, B.: Mobile monitoring for mapping spatial variation in
urban air quality: Development and validation of a methodology based on an
extensive dataset, Atmos. Environ., 105, 148–161,
https://doi.org/10.1016/j.atmosenv.2015.01.017, 2015. a
Villena, G., Kleffmann, J., Kurtenbach, R., Wiesen, P., Lissi, E., Rubio,
M. A., Croxatto, G., and Rappenglück, B.: Vertical gradients of HONO,
NOx and O3 in Santiago de Chile, Atmos. Environ., 45, 3867–3873,
https://doi.org/10.1016/j.atmosenv.2011.01.073, 2011. a
von der Weiden-Reinmüller, S.-L., Drewnick, F., Zhang, Q. J., Freutel,
F., Beekmann, M., and Borrmann, S.: Megacity emission plume characteristics
in summer and winter investigated by mobile aerosol and trace gas
measurements: the Paris metropolitan area, Atmos. Chem. Phys., 14,
12931–12950, https://doi.org/10.5194/acp-14-12931-2014, 2014. a
Worton, D. R., Isaacman, G., Gentner, D. R., Dallmann, T. R., Chan, A. W.,
Ruehl, C., Kirchstetter, T. W., Wilson, K. R., Harley, R. A., and Goldstein,
A. H.: Lubricating oil dominates primary organic aerosol emissions from
motor vehicles, Environ. Sci. Technol., 48, 3698–3706,
https://doi.org/10.1021/es405375j, 2014. a
Xu, L., Suresh, S., Guo, H., Weber, R. J., and Ng, N. L.: Aerosol
characterization over the southeastern United States using high-resolution
aerosol mass spectrometry: spatial and seasonal variation of aerosol
composition and sources with a focus on organic nitrates, Atmos. Chem. Phys.,
15, 7307–7336, https://doi.org/10.5194/acp-15-7307-2015, 2015. a
Ye, Q., Gu, P., Li, H. Z., Robinson, E. S., Lipsky, E., Kaltsonoudis, C., Lee,
A. K., Apte, J. S., Robinson, A. L., Sullivan, R. C., Presto, A. A., and
Donahue, N. M.: Spatial Variability of Sources and Mixing State of
Atmospheric Particles in a Metropolitan Area, Environ. Sci.
Technol., 52, 6807–6815, https://doi.org/10.1021/acs.est.8b01011,
2018. a, b, c
Yuan, C., Ng, E., and Norford, L. K.: Improving air quality in high-density
cities by understanding the relationship between air pollutant dispersion and
urban morphologies, Build. Environ., 71, 245–258,
https://doi.org/10.1016/j.buildenv.2013.10.008, 2014. a
Yun, H., Wang, Z., Zha, Q., Wang, W., Xue, L., Zhang, L., Li, Q., Cui, L., Lee,
S., Poon, S. C., and Wang, T.: Nitrous acid in a street canyon environment:
Sources and contributions to local oxidation capacity, Atmos.
Environ., 167, 223–234, https://doi.org/10.1016/j.atmosenv.2017.08.018, 2017. a
Zhang, Q., Jimenez, J. L., Canagaratna, M. R., Allan, J. D., Coe, H., Ulbrich,
I., Alfarra, M. R., Takami, A., Middlebrook, A. M., Sun, Y. L., Dzepina, K.,
Dunlea, E., Docherty, K., DeCarlo, P. F., Salcedo, D., Onasch, T., Jayne,
J. T., Miyoshi, T., Shimono, A., Hatakeyama, S., Takegawa, N., Kondo, Y.,
Schneider, J., Drewnick, F., Borrmann, S., Weimer, S., Demerjian, K.,
Williams, P., Bower, K., Bahreini, R., Cottrell, L., Griffin, R. J.,
Rautiainen, J., Sun, J. Y., Zhang, Y. M., and Worsnop, D. R.: Ubiquity and
dominance of oxygenated species in organic aerosols in
anthropogenically-influenced Northern Hemisphere midlatitudes, Geophys.
Res. Lett., 34, 1–6, https://doi.org/10.1029/2007GL029979, 2007. a, b
Zhang, Q., Jimenez, J. L., Canagaratna, M. R., Ulbrich, I. M., Ng, N. L.,
Worsnop, D. R., and Sun, Y.: Understanding atmospheric organic aerosols via
factor analysis of aerosol mass spectrometry: A review, Anal. Bioanal.
Chem., 401, 3045–3067, https://doi.org/10.1007/s00216-011-5355-y, 2011. a, b
Zhao, Y., Nguyen, N. T., Presto, A. A., Hennigan, C. J., May, A. A., and
Robinson, A. L.: Intermediate Volatility Organic Compound Emissions from
On-Road Diesel Vehicles: Chemical Composition, Emission Factors, and
Estimated Secondary Organic Aerosol Production, Environ. Sci.
Technol., 49, 11516–11526, https://doi.org/10.1021/acs.est.5b02841, 2015.
a
Zhong, J., Cai, X. M., and Bloss, W. J.: Large eddy simulation of reactive
pollutants in a deep urban street canyon: Coupling dynamics with O3-NOx-VOC
chemistry, Environ. Pollut., 224, 171–184,
https://doi.org/10.1016/j.envpol.2017.01.076, 2017. a, b
Zimmerman, N., Li, H. Z., Ellis, A. A., Hauryliuk, A., Robinson, E. S., Gu,
P., Shah, R. U., Ye, Q., Snell, L., Subramanian, R., Robinson, A. L., Apte,
J. S., and Presto, A. A.: Integrating Spatiotemporal Variability and
Modifiable Factors into Air Pollution Estimates: The Center for Air, Climate
and Energy Solutions Air Quality Observatory, Atmos. Environ., in review,
2018. a
Short summary
We measured spatial differences in airborne particulate matter (PM) in Oakland, CA, with repeated mobile measurements on all city streets. In addition to primary, we also find higher secondary organic PM downtown, which suggests stronger photochemical PM production in areas of high emissions and poor air ventilation (i.e., urban street canyons). This finding is original because while other modeling studies have predicted higher photochemistry in street canyons, we confirm this observationally.
We measured spatial differences in airborne particulate matter (PM) in Oakland, CA, with...
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