Articles | Volume 14, issue 21
https://doi.org/10.5194/acp-14-11893-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-14-11893-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Review article
| 
13 Nov 2014
Review article |
| 13 Nov 2014
Chemical climatology of the southeastern United States, 1999–2013
G. M. Hidy
Envair/Aerochem, Placitas, NM, USA
C. L. Blanchard
Envair, Albany, CA, USA
K. Baumann
Atmospheric Research and Analysis, Cary, NC, USA
E. Edgerton
Atmospheric Research and Analysis, Cary, NC, USA
S. Tanenbaum
Envair, Albany, CA, USA
S. Shaw
Environment Sector, Electric Power Research Institute, Palo Alto, CA, USA
E. Knipping
Environment Sector, Electric Power Research Institute, Palo Alto, CA, USA
I. Tombach
Environmental Consultant, Camarillo, CA, USA
J. Jansen
Research and Environmental Affairs Department, Southern Company, Inc., Birmingham, AL, USA
J. Walters
Research and Environmental Affairs Department, Southern Company, Inc., Birmingham, AL, USA
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Fifteen years of gas and particle measurements at eight monitoring sites comprising the Southeastern Aerosol Research and Characterization (SEARCH) network offer insights into the sources of organic aerosol in the southeastern United States. Between 1999 and 2013, mean organic aerosol concentrations declined due to decreasing particle emissions from motor vehicles and to less secondary organic aerosol with declining emissions of sulfur dioxide, nitrogen oxides, and volatile organic compounds.
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Atmos. Chem. Phys., 19, 1867–1880, https://doi.org/10.5194/acp-19-1867-2019, https://doi.org/10.5194/acp-19-1867-2019, 2019
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Atmos. Chem. Phys., 17, 1689–1698, https://doi.org/10.5194/acp-17-1689-2017, https://doi.org/10.5194/acp-17-1689-2017, 2017
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Atmos. Chem. Phys., 17, 1343–1359, https://doi.org/10.5194/acp-17-1343-2017, https://doi.org/10.5194/acp-17-1343-2017, 2017
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Atmos. Chem. Phys., 16, 11563–11580, https://doi.org/10.5194/acp-16-11563-2016, https://doi.org/10.5194/acp-16-11563-2016, 2016
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J. Kaiser, K. M. Skog, K. Baumann, S. B. Bertman, S. B. Brown, W. H. Brune, J. D. Crounse, J. A. de Gouw, E. S. Edgerton, P. A. Feiner, A. H. Goldstein, A. Koss, P. K. Misztal, T. B. Nguyen, K. F. Olson, J. M. St. Clair, A. P. Teng, S. Toma, P. O. Wennberg, R. J. Wild, L. Zhang, and F. N. Keutsch
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Luping Su, Edward G. Patton, Jordi Vilà-Guerau de Arellano, Alex B. Guenther, Lisa Kaser, Bin Yuan, Fulizi Xiong, Paul B. Shepson, Li Zhang, David O. Miller, William H. Brune, Karsten Baumann, Eric Edgerton, Andrew Weinheimer, Pawel K. Misztal, Jeong-Hoo Park, Allen H. Goldstein, Kate M. Skog, Frank N. Keutsch, and John E. Mak
Atmos. Chem. Phys., 16, 7725–7741, https://doi.org/10.5194/acp-16-7725-2016, https://doi.org/10.5194/acp-16-7725-2016, 2016
Sri Hapsari Budisulistiorini, Karsten Baumann, Eric S. Edgerton, Solomon T. Bairai, Stephen Mueller, Stephanie L. Shaw, Eladio M. Knipping, Avram Gold, and Jason D. Surratt
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Weruka Rattanavaraha, Kevin Chu, Sri Hapsari Budisulistiorini, Matthieu Riva, Ying-Hsuan Lin, Eric S. Edgerton, Karsten Baumann, Stephanie L. Shaw, Hongyu Guo, Laura King, Rodney J. Weber, Miranda E. Neff, Elizabeth A. Stone, John H. Offenberg, Zhenfa Zhang, Avram Gold, and Jason D. Surratt
Atmos. Chem. Phys., 16, 4897–4914, https://doi.org/10.5194/acp-16-4897-2016, https://doi.org/10.5194/acp-16-4897-2016, 2016
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The mechanisms by which specific anthropogenic pollutants enhance isoprene SOA in ambient PM2.5 remain unclear. As one aspect of an investigation to examine how anthropogenic pollutants influence isoprene-derived SOA formation, high-volume PM2.5 filter samples were collected from Birmingham, AL, during the 2013 Southern Oxidant and Aerosol Study (SOAS). Isoprene SOA tracers were measured from these samples and compared to gas and aerosol data collected from the SEARCH network.
Sean Coburn, Barbara Dix, Eric Edgerton, Christopher D. Holmes, Douglas Kinnison, Qing Liang, Arnout ter Schure, Siyuan Wang, and Rainer Volkamer
Atmos. Chem. Phys., 16, 3743–3760, https://doi.org/10.5194/acp-16-3743-2016, https://doi.org/10.5194/acp-16-3743-2016, 2016
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Here we present a day of case study measurements of the vertical distribution of bromine monoxide over the coastal region of the Gulf of Mexico. These measurements are used to assess the contribution of bromine radicals to the oxidation of elemental mercury in the troposphere. We find that the measured levels of bromine in the troposphere are sufficient to quickly oxidize mercury, which has significant implications for our understanding of atmospheric mercury processes.
C. L. Blanchard, G. M. Hidy, S. Shaw, K. Baumann, and E. S. Edgerton
Atmos. Chem. Phys., 16, 215–238, https://doi.org/10.5194/acp-16-215-2016, https://doi.org/10.5194/acp-16-215-2016, 2016
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Fifteen years of gas and particle measurements at eight monitoring sites comprising the Southeastern Aerosol Research and Characterization (SEARCH) network offer insights into the sources of organic aerosol in the southeastern United States. Between 1999 and 2013, mean organic aerosol concentrations declined due to decreasing particle emissions from motor vehicles and to less secondary organic aerosol with declining emissions of sulfur dioxide, nitrogen oxides, and volatile organic compounds.
B. R. Ayres, H. M. Allen, D. C. Draper, S. S. Brown, R. J. Wild, J. L. Jimenez, D. A. Day, P. Campuzano-Jost, W. Hu, J. de Gouw, A. Koss, R. C. Cohen, K. C. Duffey, P. Romer, K. Baumann, E. Edgerton, S. Takahama, J. A. Thornton, B. H. Lee, F. D. Lopez-Hilfiker, C. Mohr, P. O. Wennberg, T. B. Nguyen, A. Teng, A. H. Goldstein, K. Olson, and J. L. Fry
Atmos. Chem. Phys., 15, 13377–13392, https://doi.org/10.5194/acp-15-13377-2015, https://doi.org/10.5194/acp-15-13377-2015, 2015
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This paper reports atmospheric gas- and aerosol-phase field measurements from the southeastern United States in summer 2013 to demonstrate that the oxidation of biogenic volatile organic compounds by nitrate radical produces a substantial amount of secondary organic aerosol in this region. This process, driven largely by monoterpenes, results in a comparable aerosol nitrate production rate to inorganic nitrate formation by heterogeneous uptake of HNO3 onto dust particles.
F. Xiong, K. M. McAvey, K. A. Pratt, C. J. Groff, M. A. Hostetler, M. A. Lipton, T. K. Starn, J. V. Seeley, S. B. Bertman, A. P. Teng, J. D. Crounse, T. B. Nguyen, P. O. Wennberg, P. K. Misztal, A. H. Goldstein, A. B. Guenther, A. R. Koss, K. F. Olson, J. A. de Gouw, K. Baumann, E. S. Edgerton, P. A. Feiner, L. Zhang, D. O. Miller, W. H. Brune, and P. B. Shepson
Atmos. Chem. Phys., 15, 11257–11272, https://doi.org/10.5194/acp-15-11257-2015, https://doi.org/10.5194/acp-15-11257-2015, 2015
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Hydroxynitrates from isoprene oxidation were quantified both in the laboratory and through field studies. The yield of hydroxynitrates 9(+4/-3)% derived from chamber experiments was applied in a zero-dimensional model to simulate the production and loss of isoprene hydroxynitrates in an ambient environment during the 2013 Southern Oxidant and Aerosol Study (SOAS). NOx was determined to be the limiting factor for the formation of isoprene hydroxynitrates during SOAS.
H. M. Allen, D. C. Draper, B. R. Ayres, A. Ault, A. Bondy, S. Takahama, R. L. Modini, K. Baumann, E. Edgerton, C. Knote, A. Laskin, B. Wang, and J. L. Fry
Atmos. Chem. Phys., 15, 10669–10685, https://doi.org/10.5194/acp-15-10669-2015, https://doi.org/10.5194/acp-15-10669-2015, 2015
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We report ion chromatographic measurements of gas- and aerosol-phase inorganic species at the SOAS 2013 field study. Our particular focus is on inorganic nitrate aerosol formation via HNO3 uptake onto coarse-mode dust and sea salt particles, which we find to be the dominant source of episodic inorganic nitrate at this site, due to the high acidity of the particles preventing formation of NH4NO3. We calculate a production rate of inorganic nitrate aerosol.
S. H. Budisulistiorini, X. Li, S. T. Bairai, J. Renfro, Y. Liu, Y. J. Liu, K. A. McKinney, S. T. Martin, V. F. McNeill, H. O. T. Pye, A. Nenes, M. E. Neff, E. A. Stone, S. Mueller, C. Knote, S. L. Shaw, Z. Zhang, A. Gold, and J. D. Surratt
Atmos. Chem. Phys., 15, 8871–8888, https://doi.org/10.5194/acp-15-8871-2015, https://doi.org/10.5194/acp-15-8871-2015, 2015
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Isoprene epoxydiols (IEPOX) are major gas-phase products from the atmospheric oxidation of isoprene that yield secondary organic aerosol (SOA) by reactive uptake onto acidic sulfate aerosol. We report a substantial contribution of IEPOX-derived SOA to the total fine aerosol collected during summer. IEPOX-derived SOA measured by online and offline mass spectrometry techniques is correlated with acidic sulfate aerosol, demonstrating the critical role of anthropogenic emissions in its formation.
D. B. Millet, M. Baasandorj, D. K. Farmer, J. A. Thornton, K. Baumann, P. Brophy, S. Chaliyakunnel, J. A. de Gouw, M. Graus, L. Hu, A. Koss, B. H. Lee, F. D. Lopez-Hilfiker, J. A. Neuman, F. Paulot, J. Peischl, I. B. Pollack, T. B. Ryerson, C. Warneke, B. J. Williams, and J. Xu
Atmos. Chem. Phys., 15, 6283–6304, https://doi.org/10.5194/acp-15-6283-2015, https://doi.org/10.5194/acp-15-6283-2015, 2015
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Formic acid (HCOOH) is an abundant atmospheric acid that affects precipitation chemistry and acidity. HCOOH measurements over the USA are 2-3× larger than can be explained by known sources and sinks, revealing a key gap in current understanding. Observations indicate a large biogenic source plus chemical production across a range of precursors. Model simulations cannot capture the HCOOH diurnal amplitude or nocturnal profile, implying a deposition bias and possibly even larger missing source.
J. Huang, M. B. Miller, E. Edgerton, and M. S. Gustin
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acpd-15-12069-2015, https://doi.org/10.5194/acpd-15-12069-2015, 2015
Revised manuscript not accepted
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Gaseous oxidized Hg (GOM) is a major contributor to Hg in wet and dry deposition. Recent work has indicated that the concentrations of GOM as measured are too low by 3-to-12 times; and that compounds vary across space and time. Data collected in Florida indicate five potential GOM compounds, including HgBr2, HgO, Hg(NO3)2, HgSO4, and an unknown compound. Sources include local combustion (cars and power plants), the marine boundary layer, and long range transport from Asia.
T. Fang, V. Verma, H. Guo, L. E. King, E. S. Edgerton, and R. J. Weber
Atmos. Meas. Tech., 8, 471–482, https://doi.org/10.5194/amt-8-471-2015, https://doi.org/10.5194/amt-8-471-2015, 2015
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This work summarizes a newly developed semi-automated system for quantifying the oxidative potential of aerosol aqueous extracts using the dithiothreitol (DTT) assay. 500 sample analyses indicate that DTT activity in the southeast US is likely not dominated by a unique local source, and sources change with season. The unique large data set generated with the technique described in this paper allows new studies on DTT sources and investigating linkages between reactive oxygen species and health.
V. Verma, T. Fang, H. Guo, L. King, J. T. Bates, R. E. Peltier, E. Edgerton, A. G. Russell, and R. J. Weber
Atmos. Chem. Phys., 14, 12915–12930, https://doi.org/10.5194/acp-14-12915-2014, https://doi.org/10.5194/acp-14-12915-2014, 2014
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The major emission sources of the reactive oxygen species (ROS) associated with ambient particulate matter in the southeastern United States were identified. The study shows biomass burning and secondary aerosol formation as the major sources contributing to the ROS-generating capability of ambient particles. The ubiquitous nature of these two sources suggests widespread population exposures to the toxic aerosol components.
Y. You, V. P. Kanawade, J. A. de Gouw, A. B. Guenther, S. Madronich, M. R. Sierra-Hernández, M. Lawler, J. N. Smith, S. Takahama, G. Ruggeri, A. Koss, K. Olson, K. Baumann, R. J. Weber, A. Nenes, H. Guo, E. S. Edgerton, L. Porcelli, W. H. Brune, A. H. Goldstein, and S.-H. Lee
Atmos. Chem. Phys., 14, 12181–12194, https://doi.org/10.5194/acp-14-12181-2014, https://doi.org/10.5194/acp-14-12181-2014, 2014
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Amiens play important roles in atmospheric secondary aerosol formation and human health, but the fast response measurements of amines are lacking. Here we show measurements in a southeastern US forest and a moderately polluted midwestern site. Our results show that gas to particle conversion is an important process that controls ambient amine concentrations and that biomass burning is an important source of amines.
S. H. Budisulistiorini, M. R. Canagaratna, P. L. Croteau, K. Baumann, E. S. Edgerton, M. S. Kollman, N. L. Ng, V. Verma, S. L. Shaw, E. M. Knipping, D. R. Worsnop, J. T. Jayne, R.J. Weber, and J. D. Surratt
Atmos. Meas. Tech., 7, 1929–1941, https://doi.org/10.5194/amt-7-1929-2014, https://doi.org/10.5194/amt-7-1929-2014, 2014
J. Liu, M. Bergin, H. Guo, L. King, N. Kotra, E. Edgerton, and R. J. Weber
Atmos. Chem. Phys., 13, 12389–12404, https://doi.org/10.5194/acp-13-12389-2013, https://doi.org/10.5194/acp-13-12389-2013, 2013
Y.-H. Lin, E. M. Knipping, E. S. Edgerton, S. L. Shaw, and J. D. Surratt
Atmos. Chem. Phys., 13, 8457–8470, https://doi.org/10.5194/acp-13-8457-2013, https://doi.org/10.5194/acp-13-8457-2013, 2013
Related subject area
Subject: Aerosols | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Gas–particle partitioning of semivolatile organic compounds when wildfire smoke comes to town
Enrichment of calcium in sea spray aerosol: insights from bulk measurements and individual particle analysis during the R/V Xuelong cruise in the summertime in Ross Sea, Antarctica
Elucidating the mechanisms of atmospheric new particle formation in the highly polluted Po Valley, Italy
Source apportionment study on particulate air pollution in two high-altitude Bolivian cities: La Paz and El Alto
Morphological features and water solubility of iron in aged fine aerosol particles over the Indian Ocean
What chemical species are responsible for new particle formation and growth in the Netherlands? A hybrid positive matrix factorization (PMF) analysis using aerosol composition (ACSM) and size (SMPS)
Physicochemical and Temporal Characteristics of Individual Atmospheric Aerosol Particles in Urban Seoul during KORUS-AQ Campaign: Insights from Single-Particle Analysis
Measurement report: Stoichiometry of dissolved iron and aluminum as an indicator of the factors controlling the fractional solubility of aerosol iron – results of the annual observations of size-fractionated aerosol particles in Japan
Variation in chemical composition and volatility of oxygenated organic aerosol in different rural, urban, and remote environments
In-depth study of the formation processes of single atmospheric particles in the south-eastern margin of the Tibetan Plateau
Climatology of aerosol properties at an atmospheric monitoring site on the northern California coast
Concurrent photochemical whitening and darkening of ambient brown carbon
High-time-resolution chemical composition and source apportionment of PM2.5 in northern Chinese cities: implications for policy
Measurement report: New insights into the mixing structures of black carbon on the eastern Tibetan Plateau – soot redistribution and fractal dimension enhancement by liquid–liquid phase separation
Seasonal variations in the production of singlet oxygen and organic triplet excited states in aqueous PM2.5 in Hong Kong SAR, South China
Fractional solubility of iron in mineral dust aerosols over coastal Namibia: a link with marine biogenic emissions?
Nighttime NO emissions strongly suppress chlorine and nitrate radical formation during the winter in Delhi
Influence of natural and anthropogenic aerosols on cloud base droplet size distributions in clouds over the South China Sea and West Pacific
The important contribution of secondary formation and biomass burning to oxidized organic nitrogen (OON) in a polluted urban area: insights from in situ measurements of a chemical ionization mass spectrometer (CIMS)
Measurement report: A 1-year study to estimate maritime contributions to PM10 in a coastal area in northern France
Morphological and optical properties of carbonaceous aerosol particles from ship emissions and biomass burning during a summer cruise measurement in the South China Sea
Tropical tropospheric aerosol sources and chemical composition observed at high-altitude in the Bolivian Andes
Evolution and chemical characteristics of organic aerosols during wintertime PM2.5 episodes in Shanghai, China: insights gained from online measurements of organic molecular markers
Arctic observations of hydroperoxymethyl thioformate (HPMTF) – seasonal behavior and relationship to other oxidation products of dimethyl sulfide at the Zeppelin Observatory, Svalbard
A 1-year aerosol chemical speciation monitor (ACSM) source analysis of organic aerosol particle contributions from anthropogenic sources after long-range transport at the TROPOS research station Melpitz
Contributions of primary emissions and secondary formation to nitrated aromatic compounds in themountain background region of Southeast China
Mist cannon trucks can exacerbate the formation of water-soluble organic aerosol and PM2.5 pollution in the road environment
Amino acids, carbohydrates, and lipids in the tropical oligotrophic Atlantic Ocean: sea-to-air transfer and atmospheric in situ formation
Measurement report: Atmospheric Ice Nuclei at Changbai Mountain (2623 m a.s.l.) in Northeastern Asia
Ambient carbonaceous aerosol levels in Cyprus and the role of pollution transport from the Middle East
Eric Schneider, Hendryk Czech, Olga Popovicheva, Marina Chichaeva, Vasily Kobelev, Nikolay Kasimov, Tatiana Minkina, Christopher Paul Rüger, and Ralf Zimmermann
Atmos. Chem. Phys., 24, 553–576, https://doi.org/10.5194/acp-24-553-2024, https://doi.org/10.5194/acp-24-553-2024, 2024
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This study provides insights into the complex chemical composition of long-range-transported wildfire plumes from Yakutia, which underwent different levels of atmospheric processing. With complementary mass spectrometric techniques, we improve our understanding of the chemical processes and atmospheric fate of wildfire plumes. Unprecedented high levels of carbonaceous aerosols crossed the polar circle with implications for the Arctic ecosystem and consequently climate.
Qiongqiong Wang, Shuhui Zhu, Shan Wang, Cheng Huang, Yusen Duan, and Jian Zhen Yu
Atmos. Chem. Phys., 24, 475–486, https://doi.org/10.5194/acp-24-475-2024, https://doi.org/10.5194/acp-24-475-2024, 2024
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We investigated short-term source apportionment of PM2.5 utilizing rolling positive matrix factorization (PMF) and online PM chemical speciation data, which included source-specific organic tracers collected over a period of 37 d during the winter of 2019–2020 in suburban Shanghai, China. The findings highlight that by imposing constraints on the primary source profiles, short-term PMF analysis successfully replicated both the individual primary sources and the total secondary sources.
Jiyuan Yang, Guoyang Lei, Jinfeng Zhu, Yutong Wu, Chang Liu, Kai Hu, Junsong Bao, Zitong Zhang, Weili Lin, and Jun Jin
Atmos. Chem. Phys., 24, 123–136, https://doi.org/10.5194/acp-24-123-2024, https://doi.org/10.5194/acp-24-123-2024, 2024
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The atmospheric pollution and formation mechanisms of particulate-bound alkyl nitrate in Beijing were studied. C9–C16 long-chain n-alkyl nitrates negatively correlated with O3 but positively correlated with PM2.5 and NO2, so they may not be produced during gas-phase homogeneous reactions in the photochemical process but form through reactions between alkanes and nitrates on PM surfaces. Particulate-bound n-alkyl nitrates strongly affect both haze pollution and atmospheric visibility.
Lisa Azzarello, Rebecca A. Washenfelder, Michael A. Robinson, Alessandro Franchin, Caroline C. Womack, Christopher D. Holmes, Steven S. Brown, Ann Middlebrook, Tim Newberger, Colm Sweeney, and Cora J. Young
Atmos. Chem. Phys., 23, 15643–15654, https://doi.org/10.5194/acp-23-15643-2023, https://doi.org/10.5194/acp-23-15643-2023, 2023
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We present a molecular size-resolved offline analysis of water-soluble brown carbon collected on an aircraft during FIREX-AQ. The smoke plumes were aged 0 to 5 h, where absorption was dominated by small molecular weight molecules, brown carbon absorption downwind did not consistently decrease, and the measurements differed from online absorption measurements of the same samples. We show how differences between online and offline absorption could be related to different measurement conditions.
Sebastian Zeppenfeld, Manuela van Pinxteren, Markus Hartmann, Moritz Zeising, Astrid Bracher, and Hartmut Herrmann
Atmos. Chem. Phys., 23, 15561–15587, https://doi.org/10.5194/acp-23-15561-2023, https://doi.org/10.5194/acp-23-15561-2023, 2023
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Marine carbohydrates are produced in the surface of the ocean, enter the atmophere as part of sea spray aerosol particles, and potentially contribute to the formation of fog and clouds. Here, we present the results of a sea–air transfer study of marine carbohydrates conducted in the high Arctic. Besides a chemo-selective transfer, we observed a quick atmospheric aging of carbohydrates, possibly as a result of both biotic and abiotic processes.
Xing Wei, Yanjie Shen, Xiao-Ying Yu, Yang Gao, Huiwang Gao, Ming Chu, Yujiao Zhu, and Xiaohong Yao
Atmos. Chem. Phys., 23, 15325–15350, https://doi.org/10.5194/acp-23-15325-2023, https://doi.org/10.5194/acp-23-15325-2023, 2023
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We investigate the contribution of grown new particles to Nccn at a rural mountain site in the North China Plain. The total particle number concentrations (Ncn) observed on 8 new particle formation (NPF) days were higher compared to non-NPF days. The Nccn at 0.2 % supersaturation (SS) and 0.4 % SS on the NPF days was significantly lower than on non-NPF days. Only one of eight NPF events had detectable net contributions to Nccn at 0.4 % SS and 1.0 % SS with increased κ values.
Yuquan Gong, Ru-Jin Huang, Lu Yang, Ting Wang, Wei Yuan, Wei Xu, Wenjuan Cao, Yang Wang, and Yongjie Li
Atmos. Chem. Phys., 23, 15197–15207, https://doi.org/10.5194/acp-23-15197-2023, https://doi.org/10.5194/acp-23-15197-2023, 2023
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This study reveals the large day–night differences in brown carbon (BrC) chromophore composition, which was not known previously. The results provide insights into the effects of atmospheric processes and emissions on BrC composition.
Ryan N. Farley, Sonya Collier, Christopher D. Cappa, Leah R. Williams, Timothy B. Onasch, Lynn M. Russell, Hwajin Kim, and Qi Zhang
Atmos. Chem. Phys., 23, 15039–15056, https://doi.org/10.5194/acp-23-15039-2023, https://doi.org/10.5194/acp-23-15039-2023, 2023
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Soot particles, also known as black carbon (BC), have important implications for global climate and regional air quality. After the particles are emitted, BC can be coated with other material, impacting the aerosol properties. We selectively measured the composition of particles containing BC to explore their sources and chemical transformations in the atmosphere. We focus on a persistent, multiday fog event in order to study the effects of chemical reactions occurring within liquid droplets.
Xiaoxiao Li, Yijing Chen, Yuyang Li, Runlong Cai, Yiran Li, Chenjuan Deng, Jin Wu, Chao Yan, Hairong Cheng, Yongchun Liu, Markku Kulmala, Jiming Hao, James N. Smith, and Jingkun Jiang
Atmos. Chem. Phys., 23, 14801–14812, https://doi.org/10.5194/acp-23-14801-2023, https://doi.org/10.5194/acp-23-14801-2023, 2023
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Near-continuous measurements show the composition, sources, and seasonal variations of ultrafine particles (UFPs) in urban Beijing. Vehicle and cooking emissions and new particle formation are the main sources of UFPs, and aqueous/heterogeneous processes increase UFP mode diameters. UFPs are the highest in winter due to the highest primary particle emission rates and new particle formation rates, and CHO fractions are the highest in summer due to the strongest photooxidation.
Jiaqi Wang, Jian Gao, Fei Che, Xin Yang, Yuanqin Yang, Lei Liu, Yan Xiang, and Haisheng Li
Atmos. Chem. Phys., 23, 14715–14733, https://doi.org/10.5194/acp-23-14715-2023, https://doi.org/10.5194/acp-23-14715-2023, 2023
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Regional-scale observations of surface O3, PM2.5 and its major chemical species, mixing layer height (MLH), and other meteorological parameters were made in the North China Plain during summer. Unlike the cold season, synchronized increases in MDA8 O3 and PM2.5 under medium MLH conditions have been witnessed. The increasing trend of PM2.5 was associated with enhanced secondary chemical formation. The correlation between MLH and secondary air pollutants should be treated with care in hot seasons.
Takuma Miyakawa, Akinori Ito, Chunmao Zhu, Atsushi Shimizu, Erika Matsumoto, Yusuke Mizuno, and Yugo Kanaya
Atmos. Chem. Phys., 23, 14609–14626, https://doi.org/10.5194/acp-23-14609-2023, https://doi.org/10.5194/acp-23-14609-2023, 2023
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This study conducted semi-continuous measurements of PM2.5 aerosols and their elemental composition in western Japan, during spring 2018. It analyzed the emissions, transport, and wet removal of elements such as Pb, Cu, Fe, and Mn. It also assessed the accuracy of modeled concentrations and found overestimations of BC and underestimations of Cu and anthropogenic Fe in East Asia. Insights into emissions, removals, and source apportionment of trace metals in the East Asian outflow were provided.
Jingjing Meng, Yachen Wang, Yuanyuan Li, Tonglin Huang, Zhifei Wang, Yiqiu Wang, Min Chen, Zhanfang Hou, Houhua Zhou, Keding Lu, Kimitaka Kawamura, and Pingqing Fu
Atmos. Chem. Phys., 23, 14481–14503, https://doi.org/10.5194/acp-23-14481-2023, https://doi.org/10.5194/acp-23-14481-2023, 2023
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This study investigated the effect of COVID-19 lockdown (LCD) measures on the formation and evolutionary process of diacids and related compounds from field observations. Results demonstrate that more aged organic aerosols are observed during the LCD due to the enhanced photochemical oxidation. Our study also found that the reactivity of 13C was higher than that of 12C in the gaseous photochemical oxidation, leading to higher δ13C values of C2 during the LCD than before the LCD.
Christopher J. Hennigan, Michael McKee, Vikram Pratap, Bryanna Boegner, Jasper Reno, Lucia Garcia, Madison McLaren, and Sara M. Lance
Atmos. Chem. Phys., 23, 14437–14449, https://doi.org/10.5194/acp-23-14437-2023, https://doi.org/10.5194/acp-23-14437-2023, 2023
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This study characterized the optical properties of light-absorbing organic compounds, called brown carbon (BrC), in atmospheric cloud water samples. In all samples, light absorption by BrC increased linearly with increasing pH. There was variability in the sensitivity of the absorption–pH relationship, depending on the degree of influence from fire emissions. Overall, these results show that the climate forcing of BrC is quite strongly affected by its pH-dependent absorption.
Máté Vörösmarty, Gaëlle Uzu, Jean-Luc Jaffrezo, Pamela Dominutti, Zsófia Kertész, Enikő Papp, and Imre Salma
Atmos. Chem. Phys., 23, 14255–14269, https://doi.org/10.5194/acp-23-14255-2023, https://doi.org/10.5194/acp-23-14255-2023, 2023
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Poor air quality caused by high concentrations of particulate matter is one of the most severe public health concerns for humans worldwide. One of the most important biological mechanisms inducing adverse health effects is the oxidant–antioxidant imbalance. We showed that the oxidative stress changed substantially and in a complex manner with location and season. Biomass burning exhibited the dominant influence, while motor vehicles played an important role in the non-heating period.
Da Lu, Hao Li, Mengke Tian, Guochen Wang, Xiaofei Qin, Na Zhao, Juntao Huo, Fan Yang, Yanfen Lin, Jia Chen, Qingyan Fu, Yusen Duan, Xinyi Dong, Congrui Deng, Sabur F. Abdullaev, and Kan Huang
Atmos. Chem. Phys., 23, 13853–13868, https://doi.org/10.5194/acp-23-13853-2023, https://doi.org/10.5194/acp-23-13853-2023, 2023
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Environmental conditions during dust are usually not favorable for secondary aerosol formation. However in this study, an unusual dust event was captured in a Chinese mega-city and showed “anomalous” meteorology and a special dust backflow transport pathway. The underlying formation mechanisms of secondary aerosols are probed in the context of this special dust event. This study shows significant implications for the varying dust aerosol chemistry in the future changing climate.
Thomas Audoux, Benoit Laurent, Karine Desboeufs, Gael Noyalet, Franck Maisonneuve, Olivier Lauret, and Servanne Chevaillier
Atmos. Chem. Phys., 23, 13485–13503, https://doi.org/10.5194/acp-23-13485-2023, https://doi.org/10.5194/acp-23-13485-2023, 2023
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In the Paris region, a campaign was conducted to study wet deposition of aerosol particles during rainfall events. Simultaneous measurements of aerosol and wet deposition allowed us to discuss their transfer from the atmosphere to rain. Chemical evolution within events revealed meteorology, atmospheric conditions and local vs. long range sources as key factors. This study highlights the variability of wet deposition and the need to consider event-specific factors to understand its mechanisms.
Ting Yang, Yu Xu, Qing Ye, Yi-Jia Ma, Yu-Chen Wang, Jian-Zhen Yu, Yu-Sen Duan, Chen-Xi Li, Hong-Wei Xiao, Zi-Yue Li, Yue Zhao, and Hua-Yun Xiao
Atmos. Chem. Phys., 23, 13433–13450, https://doi.org/10.5194/acp-23-13433-2023, https://doi.org/10.5194/acp-23-13433-2023, 2023
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In this study, 130 OS species were quantified in ambient fine particulate matter (PM2.5) collected in urban and suburban Shanghai (East China) in the summer of 2021. The daytime OS formation was concretized based on the interactions among OSs, ultraviolet (UV), ozone (O3), and sulfate. Our finding provides field evidence for the influence of photochemical process and anthropogenic sulfate on OS formation and has important implications for the mitigation of organic particulate pollution.
Elena Barbaro, Matteo Feltracco, Fabrizio De Blasi, Clara Turetta, Marta Radaelli, Warren Cairns, Giulio Cozzi, Giovanna Mazzi, Marco Casula, Jacopo Gabrieli, Carlo Barbante, and Andrea Gambaro
EGUsphere, https://doi.org/10.5194/egusphere-2023-2346, https://doi.org/10.5194/egusphere-2023-2346, 2023
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The study analyzed a year of atmospheric aerosol composition at Col Margherita in the Italian Alps. Over 100 chemical markers were identified, including major ions, organic compounds, and trace elements. It revealed sources of aerosol, highlighted impacts of Saharan Dust events, and showed anthropogenic pollution's influence despite the site's remoteness. Enrichment factors emphasized non-natural sources of trace elements. Source apportionment identified four key factors affecting the area.
Miao Zhong, Jianzhong Xu, Huiqin Wang, Li Gao, Haixia Zhu, Lixiang Zhai, Xinghua Zhang, and Wenhui Zhao
Atmos. Chem. Phys., 23, 12609–12630, https://doi.org/10.5194/acp-23-12609-2023, https://doi.org/10.5194/acp-23-12609-2023, 2023
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This study focus on coal-combustion-dominated aerosol in urban areas in northwestern China and combines the results of optical measurement and chemical analysis to deduce the evolution of these characteristics in the atmosphere, which has previously been unknown. The results provide insights into the effects of atmospheric processes and emissions on brown carbon properties.
Li Wu, Hyo-Jin Eom, Hanjin Yoo, Dhrubajyoti Gupta, Hye-Rin Cho, Pingqing Fu, and Chul-Un Ro
Atmos. Chem. Phys., 23, 12571–12588, https://doi.org/10.5194/acp-23-12571-2023, https://doi.org/10.5194/acp-23-12571-2023, 2023
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Hygroscopicity of ambient marine aerosols is of critical relevance to investigate their atmospheric impacts, which, however, remain uncertain due to their complex compositions and mixing states. Therefore, a study on the hygroscopic behavior of ambient marine aerosols for understanding the phase states when interacting with water vapor at different RH levels and their subsequent impacts on the heterogeneous chemical reactions, atmospheric environment, and human health is of vital importance.
Yutong Liang, Rebecca A. Wernis, Kasper Kristensen, Nathan M. Kreisberg, Philip L. Croteau, Scott C. Herndon, Arthur W. H. Chan, Nga L. Ng, and Allen H. Goldstein
Atmos. Chem. Phys., 23, 12441–12454, https://doi.org/10.5194/acp-23-12441-2023, https://doi.org/10.5194/acp-23-12441-2023, 2023
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We measured the gas–particle partitioning behaviors of biomass burning markers and examined the effect of wildfire organic aerosol on the partitioning of semivolatile organic compounds. Most compounds measured are less volatile than model predictions. Wildfire aerosol enhanced the condensation of polar compounds and caused some nonpolar (e.g., polycyclic aromatic hydrocarbons) compounds to partition into the gas phase, thus affecting their lifetimes in the atmosphere and the mode of exposure.
Bojiang Su, Xinhui Bi, Zhou Zhang, Yue Liang, Congbo Song, Tao Wang, Yaohao Hu, Lei Li, Zhen Zhou, Jinpei Yan, Xinming Wang, and Guohua Zhang
Atmos. Chem. Phys., 23, 10697–10711, https://doi.org/10.5194/acp-23-10697-2023, https://doi.org/10.5194/acp-23-10697-2023, 2023
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During the R/V Xuelong cruise observation over the Ross Sea, Antarctica, the mass concentrations of water-soluble Ca2+ and the mass spectra of individual calcareous particles were measured. Our results indicated that lower temperature, lower wind speed, and the presence of sea ice may facilitate Ca2+ enrichment in sea spray aerosols and highlighted the potential contribution of organically complexed calcium to calcium enrichment, which is inaccurate based solely on water-soluble Ca2+ estimation.
Jing Cai, Juha Sulo, Yifang Gu, Sebastian Holm, Runlong Cai, Steven Thomas, Almuth Neuberger, Fredrik Mattsson, Marco Paglione, Stefano Decesari, Matteo Rinaldi, Rujing Yin, Diego Aliaga, Wei Huang, Yuanyuan Li, Yvette Gramlich, Giancarlo Ciarelli, Lauriane Quéléver, Nina Sarnela, Katrianne Lehtipalo, Nora Zannoni, Cheng Wu, Wei Nie, Claudia Mohr, Markku Kulmala, Qiaozhi Zha, Dominik Stolzenburg, and Federico Bianchi
EGUsphere, https://doi.org/10.5194/egusphere-2023-1803, https://doi.org/10.5194/egusphere-2023-1803, 2023
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By combining field measurements, simulations, and recent chamber experiments, we investigate new particle formation (NPF) and its growth in Po Valley, where both haze and frequent NPF occurred. Our results showed sulfuric acid, ammonia, and amines are the dominant NPF precursors there. A high formation rate of NPF and a lower condensation sink lead to a greater survival probability for newly formed particles, highlighting the importance of gas-to-particle conversion to aerosol concentrations.
Valeria Mardoñez, Marco Pandolfi, Lucille Joanna S. Borlaza, Jean-Luc Jaffrezo, Andrés Alastuey, Jean-Luc Besombes, Isabel Moreno R., Noemi Perez, Griša Močnik, Patrick Ginot, Radovan Krejci, Vladislav Chrastny, Alfred Wiedensohler, Paolo Laj, Marcos Andrade, and Gaëlle Uzu
Atmos. Chem. Phys., 23, 10325–10347, https://doi.org/10.5194/acp-23-10325-2023, https://doi.org/10.5194/acp-23-10325-2023, 2023
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La Paz and El Alto are two fast-growing, high-altitude Bolivian cities forming the second-largest metropolitan area in the country. The sources of particulate matter (PM) in this conurbation were not previously investigated. This study identified 11 main sources of PM, of which dust and vehicular emissions stand out as the main ones. The influence of regional biomass combustion and local waste combustion was also observed, with the latter being a major source of hazardous compounds.
Sayako Ueda, Yoko Iwamoto, Fumikazu Taketani, Mingxu Liu, and Hitoshi Matsui
Atmos. Chem. Phys., 23, 10117–10135, https://doi.org/10.5194/acp-23-10117-2023, https://doi.org/10.5194/acp-23-10117-2023, 2023
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We examine iron in atmospheric fine aerosol particles collected over the Indian Ocean during shipborne observations in November 2018. Transmission electron microscopy analysis with water dialysis shows that various types of iron (fly ash, iron oxide, and mineral dust) co-exist with ammonium sulfate and that their solubility differs depending on the iron type. Using PM2.5 bulk samples and global model simulations, we elucidate their origins, aging, and implications for present iron simulations.
Farhan R. Nursanto, Roy Meinen, Rupert Holzinger, Maarten C. Krol, Xinya Liu, Ulrike Dusek, Bas Henzing, and Juliane L. Fry
Atmos. Chem. Phys., 23, 10015–10034, https://doi.org/10.5194/acp-23-10015-2023, https://doi.org/10.5194/acp-23-10015-2023, 2023
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Particulate matter (PM) is a harmful air pollutant that depends on the complex mixture of natural and anthropogenic emissions into the atmosphere. Thus, in different regions and seasons, the way that PM is formed and grows can differ. In this study, we use a combined statistical analysis of the chemical composition and particle size distribution to determine what drives particle formation and growth across seasons, using varying wind directions to elucidate the role of different sources.
Hanjin Yoo, Li Wu, Hong Geng, and Chul-Un Ro
EGUsphere, https://doi.org/10.5194/egusphere-2023-1787, https://doi.org/10.5194/egusphere-2023-1787, 2023
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We conducted an investigation of atmospheric aerosols collected in Seoul, Korea, during the KORUS-AQ campaign, on a single-particle basis. We were able to identify their sources, atmospheric fate, and the impacts of local emissions and long-range transport on aerosol composition. Additionally, we traced potential sources of non-exhaust heavy metal particles. This comprehensive analysis provides valuable insights into the complex dynamics of urban aerosols.
Kohei Sakata, Aya Sakaguchi, Yoshiaki Yamakawa, Chihiro Miyamoto, Minako Kurisu, and Yoshio Takahashi
Atmos. Chem. Phys., 23, 9815–9836, https://doi.org/10.5194/acp-23-9815-2023, https://doi.org/10.5194/acp-23-9815-2023, 2023
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Anthropogenic iron is the dominant source of dissolved Fe in aerosol particles, but its contribution to dissolved Fe in aerosol particles has not been quantitatively evaluated. We established the molar concentration ratio of dissolved Fe to dissolved Al as a new indicator to evaluate the contribution of anthropogenic iron. As a result, about 10 % of dissolved Fe in aerosol particles was derived from anthropogenic iron when aerosol particles were transported from East Asia to the Pacific Ocean.
Wei Huang, Cheng Wu, Linyu Gao, Yvette Gramlich, Sophie L. Haslett, Joel Thornton, Felipe D. Lopez-Hilfiker, Ben H. Lee, Junwei Song, Harald Saathoff, Xiaoli Shen, Ramakrishna Ramisetty, Sachchida N. Tripathi, Dilip Ganguly, Feng Jiang, Magdalena Vallon, Siegfried Schobesberger, Taina Yli-Juuti, and Claudia Mohr
EGUsphere, https://doi.org/10.5194/egusphere-2023-1821, https://doi.org/10.5194/egusphere-2023-1821, 2023
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We present distinct molecular composition and volatility of oxygenated organic aerosol particles in different rural, urban, and remote environments across the globe. We did a comprehensive investigation of the relationship between chemical composition and volatility of oxygenated organic aerosol particles across different systems and environments. This study provides implications for volatility descriptions of oxygenated organic aerosol particles in different model frameworks.
Li Li, Qiyuan Wang, Jie Tian, Huikun Liu, Yong Zhang, Steven Sai Hang Ho, Weikang Ran, and Junji Cao
Atmos. Chem. Phys., 23, 9597–9612, https://doi.org/10.5194/acp-23-9597-2023, https://doi.org/10.5194/acp-23-9597-2023, 2023
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The Tibetan Plateau has a unique geographical location, but there is a lack of detailed research on the real-time characteristics of full aerosol composition. This study elaborates the changes in chemical characteristics between transport and local fine particles during the pre-monsoon, reveals the size distribution and the mixing states of different individual particles, and highlights the contributions of photooxidation and aqueous reaction to the formation of the secondary species.
Erin K. Boedicker, Elisabeth Andrews, Patrick J. Sheridan, and Patricia K. Quinn
Atmos. Chem. Phys., 23, 9525–9547, https://doi.org/10.5194/acp-23-9525-2023, https://doi.org/10.5194/acp-23-9525-2023, 2023
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We present 15 years of measurements from a marine site on the northern California coast and characterize the seasonal trends of aerosol ion composition and optical properties at the site. We investigate the relationship between the chemical and optical properties and show that they both support similar seasonal variations in aerosol sources at the site. Additionally, we show through comparisons to other marine aerosol observations that the site is representative of a clean marine environment.
Qian Li, Dantong Liu, Xiaotong Jiang, Ping Tian, Yangzhou Wu, Siyuan Li, Kang Hu, Quan Liu, Mengyu Huang, Ruijie Li, Kai Bi, Shaofei Kong, Deping Ding, and Chenjie Yu
Atmos. Chem. Phys., 23, 9439–9453, https://doi.org/10.5194/acp-23-9439-2023, https://doi.org/10.5194/acp-23-9439-2023, 2023
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By attributing the shortwave absorption from black carbon, primary organic aerosol and secondary organic aerosol in a suburban environment, we firstly observed that the photochemically produced nitrogen-containing secondary organic aerosol may contribute to the enhancement of brown carbon absorption, partly compensating for some bleaching effect on the absorption of primary organic aerosol, hereby exerting radiative impacts.
Yong Zhang, Jie Tian, Qiyuan Wang, Lu Qi, Manousos Ioannis Manousakas, Yuemei Han, Weikang Ran, Yele Sun, Huikun Liu, Renjian Zhang, Yunfei Wu, Tianqu Cui, Kaspar Rudolf Daellenbach, Jay Gates Slowik, André S. H. Prévôt, and Junji Cao
Atmos. Chem. Phys., 23, 9455–9471, https://doi.org/10.5194/acp-23-9455-2023, https://doi.org/10.5194/acp-23-9455-2023, 2023
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PM2.5 pollution still frequently occurs in northern China during winter, and it is necessary to figure out the causes of air pollution based on intensive real-time measurement. The findings elaborate the chemical characteristics and source contributions of PM2.5 in three pilot cities, reveal potential formation mechanisms of secondary aerosols, and highlight the importance of controlling biomass burning and inhibiting generation of secondary aerosol for air quality improvement.
Qi Yuan, Yuanyuan Wang, Yixin Chen, Siyao Yue, Jian Zhang, Yinxiao Zhang, Liang Xu, Wei Hu, Dantong Liu, Pingqing Fu, Huiwang Gao, and Weijun Li
Atmos. Chem. Phys., 23, 9385–9399, https://doi.org/10.5194/acp-23-9385-2023, https://doi.org/10.5194/acp-23-9385-2023, 2023
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This study for the first time found large amounts of liquid–liquid phase separation particles with soot redistributing in organic coatings instead of sulfate cores in the eastern Tibetan Plateau atmosphere. The particle size and the ratio of the organic matter coating thickness to soot size are two of the major possible factors that likely affect the soot redistribution process. The soot redistribution process promoted the morphological compaction of soot particles.
Yuting Lyu, Yin Hau Lam, Yitao Li, Nadine Borduas-Dedekind, and Theodora Nah
Atmos. Chem. Phys., 23, 9245–9263, https://doi.org/10.5194/acp-23-9245-2023, https://doi.org/10.5194/acp-23-9245-2023, 2023
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We measured singlet oxygen (1O2*) and triplet excited states of organic matter (3C*) in illuminated aqueous extracts of PM2.5 collected in different seasons at different sites in Hong Kong SAR, South China. In contrast to the locations, seasonality had significant effects on 3C* and 1O2* production due to seasonal variations in long-range air mass transport. The steady-state concentrations of 3C* and 1O2* correlated with the concentration and absorbance of water-soluble organic carbon.
Karine Desboeufs, Paola Formenti, Raquel Torres-Sánchez, Kerstin Schepanski, Jean-Pierre Chaboureau, Hendrik Andersen, Jan Cermak, Stefanie Feuerstein, Benoit Laurent, Danitza Klopper, Andreas Namwoonde, Mathieu Cazaunau, Servanne Chevaillier, Anaïs Feron, Cecile Mirande-Bret, Sylvain Triquet, and Stuart J. Piketh
EGUsphere, https://doi.org/10.5194/egusphere-2023-1736, https://doi.org/10.5194/egusphere-2023-1736, 2023
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This study investigates the fractional solubility of iron (Fe) in dust particles along the coast of Namibia, a critical region for the atmospheric Fe supply of the Southern Atlantic Ocean. Our results suggest a possible two-way interplay whereby marine biogenic emissions from the coastal marine ecosystems to the atmosphere would increase the solubility of Fe-bearing dust by photo-reduction processes. The subsequent deposition of soluble Fe could act to further enhance marine biogenic emissions.
Sophie L. Haslett, David M. Bell, Varun Kumar, Jay G. Slowik, Dongyu S. Wang, Suneeti Mishra, Neeraj Rastogi, Atinderpal Singh, Dilip Ganguly, Joel Thornton, Feixue Zheng, Yuanyuan Li, Wei Nie, Yongchun Liu, Wei Ma, Chao Yan, Markku Kulmala, Kaspar R. Daellenbach, David Hadden, Urs Baltensperger, Andre S. H. Prevot, Sachchida N. Tripathi, and Claudia Mohr
Atmos. Chem. Phys., 23, 9023–9036, https://doi.org/10.5194/acp-23-9023-2023, https://doi.org/10.5194/acp-23-9023-2023, 2023
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In Delhi, some aspects of daytime and nighttime atmospheric chemistry are inverted, and parodoxically, vehicle emissions may be limiting other forms of particle production. This is because the nighttime emissions of nitrogen oxide (NO) by traffic and biomass burning prevent some chemical processes that would otherwise create even more particles and worsen the urban haze.
Rose Marie Miller, Robert M. Rauber, Larry Di Girolamo, Matthew Rilloraza, Dongwei Fu, Greg M. McFarquhar, Stephen W. Nesbitt, Luke D. Ziemba, Sarah Woods, and Kenneth Lee Thornhill
Atmos. Chem. Phys., 23, 8959–8977, https://doi.org/10.5194/acp-23-8959-2023, https://doi.org/10.5194/acp-23-8959-2023, 2023
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The influence of human-produced aerosols on clouds remains one of the uncertainties in radiative forcing of Earth’s climate. Measurements of aerosol chemistry from sources around the Philippines illustrate the linkage between aerosol chemical composition and cloud droplet characteristics. Differences in aerosol chemical composition in the marine layer from biomass burning, industrial, ship-produced, and marine aerosols are shown to impact cloud microphysical structure just above cloud base.
Yiyu Cai, Chenshuo Ye, Wei Chen, Weiwei Hu, Wei Song, Yuwen Peng, Shan Huang, Jipeng Qi, Sihang Wang, Chaomin Wang, Caihong Wu, Zelong Wang, Baolin Wang, Xiaofeng Huang, Lingyan He, Sasho Gligorovski, Bin Yuan, Min Shao, and Xinming Wang
Atmos. Chem. Phys., 23, 8855–8877, https://doi.org/10.5194/acp-23-8855-2023, https://doi.org/10.5194/acp-23-8855-2023, 2023
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We studied the variability and molecular composition of ambient oxidized organic nitrogen (OON) in both gas and particle phases using a state-of-the-art online mass spectrometer in urban air. Biomass burning and secondary formation were found to be the two major sources of OON. Daytime nitrate radical chemistry for OON formation was more important than previously thought. Our results improved the understanding of the sources and molecular composition of OON in the polluted urban atmosphere.
Frédéric Ledoux, Cloé Roche, Gilles Delmaire, Gilles Roussel, Olivier Favez, Marc Fadel, and Dominique Courcot
Atmos. Chem. Phys., 23, 8607–8622, https://doi.org/10.5194/acp-23-8607-2023, https://doi.org/10.5194/acp-23-8607-2023, 2023
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We quantify the emissions from the marine sector in northern France, whether from natural or human-made sources. Therefore, a 1-year PM10 sampling campaign was conducted at a French coastal site. Results showed that sea salts contributed 37 %, while secondary nitrate and sulfate contributed 42 %, biomass burning 8 %, and heavy-fuel-oil combustion from shipping emissions 5 %. Sources contributing more than 80 % of PM10 are of regional and/or long-range origin.
Cuizhi Sun, Yongyun Zhang, Baoling Liang, Min Gao, Xi Sun, Fei Li, Xue Ni, Qibin Sun, Hengjia Ou, Dexian Chen, Shengzhen Zhou, and Jun Zhao
EGUsphere, https://doi.org/10.5194/egusphere-2023-1589, https://doi.org/10.5194/egusphere-2023-1589, 2023
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Black and brown carbon particles contribute significantly to light absorption and hence heat the atmosphere. However, their contribution is currently not well known, especially in the South China Sea. We conduct a ship-based cruise campaign in this region to measure the properties of these particles using advanced instruments. The results show that the properties differed depending on their origins, and the size, shape, and fractal dimensions changed little after they spent some time in the air.
C. Isabel Moreno, Radovan Krejci, Jean-Luc Jaffrezo, Gaëlle Uzu, Andrés Alastuey, Marcos F. Andrade, Valeria Mardóñez, Alkuin Maximilian Koenig, Diego Aliaga, Claudia Mohr, Laura Ticona, Fernando Velarde, Luis Blacutt, Ricardo Forno, David N. Whiteman, Alfred Wiedensohler, Patrick Ginot, and Paolo Laj
EGUsphere, https://doi.org/10.5194/egusphere-2023-1298, https://doi.org/10.5194/egusphere-2023-1298, 2023
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Aerosol chemical composition (ions, sugars, carbonaceous matter) from 2011 to 2020 was studied at Mt. Chacaltaya (5380 masl, Bolivian Andes), in a region lacking data. Minimum concentrations occur in the rainy season and maxima in the dry-transition seasons. The origins of the aerosol are located in a radius of hundreds of kilometers: nearby urban and rural areas; natural biogenic emissions; vegetation burning from Amazonia and Chaco; Pacific Ocean emissions; soil dust; and Peruvian volcanism.
Shuhui Zhu, Min Zhou, Liping Qiao, Dan Dan Huang, Qiongqiong Wang, Shan Wang, Yaqin Gao, Shengao Jing, Qian Wang, Hongli Wang, Changhong Chen, Cheng Huang, and Jian Zhen Yu
Atmos. Chem. Phys., 23, 7551–7568, https://doi.org/10.5194/acp-23-7551-2023, https://doi.org/10.5194/acp-23-7551-2023, 2023
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Organic aerosol (OA) is increasingly important in urban PM2.5 pollution as inorganic ions are becoming lower. We investigated the chemical characteristics of OA during nine episodes in Shanghai. The availability of bi-hourly measured molecular markers revealed that the control of local urban sources such as vehicular and cooking emissions lessened the severity of local episodes. Regional control of precursors and biomass burning would reduce PM2.5 episodes influenced by regional transport.
Karolina Siegel, Yvette Gramlich, Sophie L. Haslett, Gabriel Freitas, Radovan Krejci, Paul Zieger, and Claudia Mohr
Atmos. Chem. Phys., 23, 7569–7587, https://doi.org/10.5194/acp-23-7569-2023, https://doi.org/10.5194/acp-23-7569-2023, 2023
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Hydroperoxymethyl thioformate (HPMTF) is a recently discovered oxidation product of dimethyl sulfide (DMS). We present a full year of concurrent gas- and particle-phase observations of HPMTF and other DMS oxidation products from the Arctic. We did not observe significant amounts of HPMTF in the particle phase but a good agreement between gas-phase HMPTF and methanesulfonic acid in the summer. Our study provides information about the relationship between HPMTF and other DMS oxidation products.
Samira Atabakhsh, Laurent Poulain, Gang Chen, Francesco Canonaco, André S. H. Prévôt, Mira Pöhlker, Alfred Wiedensohler, and Hartmut Herrmann
Atmos. Chem. Phys., 23, 6963–6988, https://doi.org/10.5194/acp-23-6963-2023, https://doi.org/10.5194/acp-23-6963-2023, 2023
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The study focuses on the aerosol chemical variations found in the rural-background station of Melpitz based on ACSM and MAAP measurements. Source apportionment on both organic aerosol (OA) and black carbon (eBC) was performed, and source seasonality was also linked to air mass trajectories. Overall, three anthropogenic sources were identified in OA and eBC plus two additional aged OA. Our results demonstrate the influence of transported coal-combustion-related OA even during summer time.
Yanqin Ren, Gehui Wang, Jie Wei, Jun Tao, Zhisheng Zhang, and Hong Li
Atmos. Chem. Phys., 23, 6835–6848, https://doi.org/10.5194/acp-23-6835-2023, https://doi.org/10.5194/acp-23-6835-2023, 2023
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Nine quantified nitrated aromatic compounds (NACs) in PM2.5 were examined at the peak of Mt. Wuyi. They manifested a significant rise in overall abundance in the winter and autumn. The transport of contaminants had a significant impact on NACs. Under low-NOx conditions, the formation of NACs was comparatively sensitive to NO2, suggesting that NACs would become significant in the aerosol characteristics when nitrate concentrations decreased as a result of emission reduction measures.
Yu Xu, Xin-Ni Dong, Chen He, Dai-She Wu, Hong-Wei Xiao, and Hua-Yun Xiao
Atmos. Chem. Phys., 23, 6775–6788, https://doi.org/10.5194/acp-23-6775-2023, https://doi.org/10.5194/acp-23-6775-2023, 2023
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The air pollution associated with fine particles and secondary organic aerosol is not weakened by the application of mist cannon trucks but rather is aggravated. Our results provide not only new insights into the formation processes of aerosol water-soluble organic compounds associated with the water mist sprayed by mist cannon trucks in the road atmospheric environment but also crucial information for the decision makers to regulate the operation of mist cannon trucks in many cities in China.
Manuela van Pinxteren, Sebastian Zeppenfeld, Khanneh Wadinga Fomba, Nadja Triesch, Sanja Frka, and Hartmut Herrmann
Atmos. Chem. Phys., 23, 6571–6590, https://doi.org/10.5194/acp-23-6571-2023, https://doi.org/10.5194/acp-23-6571-2023, 2023
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Important marine organic carbon compounds were identified in the Atlantic Ocean and marine aerosol particles. These compounds were strongly enriched in the atmosphere. Their enrichment was, however, not solely explained via sea-to-air transfer but also via atmospheric in situ formation. The identified compounds constituted about 50 % of the organic carbon on the aerosol particles, and a pronounced coupling between ocean and atmosphere for this oligotrophic region could be concluded.
Yue Sun, Yujiao Zhu, Yanbin Qi, Lanxiadi Chen, Jiangshan Mu, Ye Shan, Yu Yang, Yanqiu Nie, Ping Liu, Can Cui, Ji Zhang, Mingxuan Liu, Lingli Zhang, Yufei Wang, Xinfeng Wang, Mingjin Tang, Wenxing Wang, and Likun Xue
EGUsphere, https://doi.org/10.5194/egusphere-2023-925, https://doi.org/10.5194/egusphere-2023-925, 2023
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Field observations were conducted at the top of Changbai Mountain in Northeast Asia. Our findings indicate that the ice-nucleating particles (INPs) were mainly dominated by biological sources, accounting for over 90 % above the freezing temperature of −13.0 °C. Biological INPs were found to attached to soil dust surfaces, and their concentrations influenced by a combination of factors, such as the planetary boundary layer height, valley breezes, and long-distance transport of air mass.
Aliki Christodoulou, Iasonas Stavroulas, Mihalis Vrekoussis, Maximillien Desservettaz, Michael Pikridas, Elie Bimenyimana, Jonilda Kushta, Matic Ivančič, Martin Rigler, Philippe Goloub, Konstantina Oikonomou, Roland Sarda-Estève, Chrysanthos Savvides, Charbel Afif, Nikos Mihalopoulos, Stéphane Sauvage, and Jean Sciare
Atmos. Chem. Phys., 23, 6431–6456, https://doi.org/10.5194/acp-23-6431-2023, https://doi.org/10.5194/acp-23-6431-2023, 2023
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Our study presents, for the first time, a detailed source identification of aerosols at an urban background site in Cyprus (eastern Mediterranean), a region strongly impacted by climate change and air pollution. Here, we identify an unexpected high contribution of long-range transported pollution from fossil fuel sources in the Middle East, highlighting an urgent need to further characterize these fast-growing emissions and their impacts on regional atmospheric composition, climate, and health.
Cited articles
Atmospheric Research and Analysis (ARA): Home; Public Data Archive, available at: http://www.atmospheric-research.com/studies/SEARCH/index.html (last access: 5 March 2014), 2013.
Banta, R., Senff, C. Nielsen-Gammon, J., Darby, L., Ryerson, T., White, A., Trainer, M., McNider, R., Valente, J., Mayer, S., Alvarez, R., Hardesty, M., Parrish, D., and Fehsenfeld, F.: Daytime buildup and nighttime transport of urban ozone in the boundary layer during a stagnation episode, J. Geophys. Res.-Atmos., 103, 22519–22544, 1998.
Baumann, K., Williams, E., Angevine, W., Roberts, J., Norton, R., Frost, G., Fehsenfeld, F., Spingston, S., Bertman, S., and Hartsell, B.: Ozone production and transport near Nashville, Tennessee: results from 1994 study at New Hendersonville, J. Geophys. Res.-Atmos., 105, 9137–9153, 2000.
Blanchard, C. L., Tanenbaum, S., and Hidy, G. M.: Effects of sulfur dioxide and oxides of nitrogen emission reductions on fine particulate matter mass concentrations: regional comparisons, JAPCA J. Air Waste Ma., 57, 1337–1350, 2007.
Blanchard, C. L., Hidy, G. M., Tanenbaum, S., Edgerton, E., Hartsell, B., and Jansen, J.: Carbon in Southeastern Aerosol Particles: empirical estimates of secondary organic aerosol formation, Atmos. Environ., 42, 6710–6720, 2008.
Blanchard, C. L., Tanenbaum, S., Hidy, G. M., Rasmussen, R., and Watkins, R.: NMOC, ozone and organic aerosol in the southeastern states, 1999–2007, 1. Spatial and temporal variations of NMOC concentrations and composition in Atlanta, Georgia, Atmos. Environ., 44, 4827–4839, 2010a.
Blanchard, C. L., Tanenbaum, S., and Hidy, G. M.: NMOC, ozone and organic aerosol in the southeastern states, 1999–2007, 2. Ozone trends and sensitivity to NMOC emissions in Atlanta, Georgia, Atmos. Environ., 44, 4840–4849, 2010b.
Blanchard, C. L., Tanenbaum, S., and Hidy, G. M.: NMOC, ozone and organic aerosol in the southeastern states, 1999–2007, 3. Origins of organic aerosol in Atlanta, Georgia and surrounding areas, Atmos. Environ., 45, 1291–1302, 2011.
Blanchard, C. L., Hidy, G. M., Tanenbaum, S., Edgerton, E., and Hartsell, B.: The southeastern aerosol research and characterization (SEARCH) study: Spatial variations and chemical climatology, 1999–2010, JAPCA J. Air Waste Ma., 63, 260–275, 2013a.
Blanchard, C. L., Hidy, G., Tanenbaum, S., Edgerton, E., and Hartsell, B.: The southeastern aerosol research and characterization (SEARCH) study: Temporal trends in the PM and gas concentrations and composition, 1999–2010, JAPCA J. Air Waste Ma., 63, 247–259, 2013b.
Blanchard, C. L., Tanenbaum, S., and Hidy, G. M.: Source attribution of trends in air pollutant concentrations in the Southeastern Aerosol Research and Characterization (SEARCH), Environ. Sci. Technol., 47, 13,536–13,545, https://doi.org/10.1021/es402876s, 2013c.
Blanchard, C. L.,Tanenbaum, S., Hidy, G. M.: Ozone in the southeastern United States: an observation-based model using measurements from the Southeastern Aerosol Research and Characterization (SEARCH) network, Atmos. Environ., 48, 192–200, https://doi.org/10.1016/j.atmosenv.2014.02.006, 2014a.
Blanchard, C. L., Chow, J., Edgerton, E., Watson, J. G., Hidy, G. M., and Shaw, S.: Organic aerosols in the southeastern United States: speciated particulate carbon measurements from the SEARCH network, 2006–2010, Atmos. Environ., 89, 382–391, https://doi.org/10.1016/j.atmosenv.2014.01.006, 2014b.
Brooks, S., deMott, P., and Kreidenweis, S.: Water uptake by particles containing humic materials and mixtures of humic materials with ammonium sulfate, Atmos. Environ., 38, 1859–1868, 2004.
Budisulistiorini, S., Canagarratna, M., Croteau, P., Marth, W., Baumann, K. Edgerton, E., Shaw, S., Knipping, E., Worsnop, D., Jayne, J., Gold, A., Turpin, B., Guenther, A., Cohen, R., Shepson, P., Shaw, S., Wiedimyer, G., Surratt, J., Wennberg, P., and Pierce, J.: Real-time continuous characterization of secondary organic aerosol deriving from isoprene epoxydiols in downtown Atlanta, Georgia, using the Aerodyne aerosol chemical speciation monitor, Environ. Sci. Technol., 47, 5686–5694, 2013.
Camalier, L., Cox, W., and Dolwick, P.: The effects of meteorology and their use in assessing ozone trends, Atmos. Environ., 41, 7127–7137, 2007.
Carlton, A. G. and Turpin, B. J.: Particle partitioning potential of organic compounds is highest in the Eastern US and driven by anthropogenic water, Atmos. Chem. Phys., 13, 10203–10214, https://doi.org/10.5194/acp-13-10203-2013, 2013.
Carlton, A. G., Goldstein, A., Jiminez, J., Pinder, R., deGouw, J., Turpin, B., Guenther, A., Cohen, R., Shepson, P., Shaw, S., Wiedimyer, C., Surratt, J., Wennberg, P., and Pierce, J.: The Southern Oxidant and Aerosol Study (design rationale), available at: http://climate.envsci.rutgers.edu/SOAS/SOAS_White_Paper_final.pdf (last access: 15 January 2014), 2013.
Chameides, W. and Cowling, E.: The State of the Southern Oxidant Study: Policy Relevant Findings in O3 Pollution Research, 1988–1994, Rep. Southern Oxidant Study, North Carolina State University, Raleigh, NC, 1995.
Chameides, W., Lindsay, R., Richardson, J., and Kiang, C.: The role of biogenic hydrocarbons in urban photochemical smog: Atlanta as a case study, Science, 24, 1473–1475, 1988.
Ding, X., Zheng, N. M., Edgerton, E., Jansen, J., and Wang, X.: Contemporary or fossil origin: split of estimated secondary organic carbon in the southeastern United States, Environ. Sci. Technol., 42, 9122–9128, 2008.
Edgerton, E., Hartsell, B., Saylor, R., Jansen and, J., Hansen, D. A., and Hidy, G.: The Southeastern Aerosol Research and Characterization Study: Part 2 – Filter based measurements of PM2.5 and PMcoarse mass and composition, JAPCA J. Air Waste Ma., 55, 1427–1442, 2005.
Edgerton, E., Hartsell, B., Saylor, R., Jansen, J., Hansen, D. A., and Hidy, G.: The Southeastern Aerosol Research and Characterization Study: Part 3 – Continuous measurements of PM2.5 mass and composition, JAPCA J. Air Waste Ma., 56, 1325–1341, 2006.
Edgerton, E., Saylor, R., Hartsell, B., Jansen, J., and Hansen, D. A.: Ammonia and ammonium measurements from the Southeastern US 2007, Atmos. Environ., 41, 3339–3351, 2007.
Electric Power Research Institute (EPRI): The Southeastern Aerosol Research and Characterization (SEARCH) Network, Report 1023331, EPRI, Palo Alto, CA, 2013.
Environmental Protection Agency (EPA): Nonmethane Organic Compound (NMOC) and Speciated Non Methane Organic Compound (SNMOC) Monitoring Program, EPA-454/R-99-053, EPA, Research Triangle Park, NC, available at: www.epa.gov/ttnamti1/archive/files/ambient/criteria/reldocs/r-99-053.pdf (last access: 4 December 2013), 1999.
Environmental Protection Agency (EPA): Research Partnership "Southern Atmosphere Study (SAS)", available at: http://blog.epa.gov/science/tag/southern-atmosphere-study-sas, last access: 11 November 2014a.
Environmental Protection Agency (EPA): 2011 Based Emissions Modeling Platform, available at: http://www.epa.gov/ttn/chief/emch/index.html#2011, last access: 28 February 2014b.
Frost, G., Trainer, M., Allwine, G., Bhr, M., Calvert, J., Cantrell, C., Fehsenfeld, F., Goldan, P., Herwehe, J., Hubler, G., Kustler, W., Martin, R., McMillen, R., Montzka, S., Norton, R., Parrish, D., Ridley, B., Shetter, R., Walega, J., Watkins, B., Westberg, H., and Williams, E.: Photochemical ozone production in the rural southeastern United States during the 1990 Rural Oxidants in Southern Environments (ROSE) program, J. Geophys. Res.-Atmos., 103, 22491–22508, 1998.
Froyd, K., Murphy, S., Murphy, D., deGouw, J., Eddinger, M., and Wennburg, P.: Contribution of isosprene-derived organosulfates to free tropopsheric aerosol mass, P. Natl. Acad. Sci. USA, 107, 21,360–21,365, 2010.
Fuchs, H., Hofzumahaus, A., Rohrer, F., Bohn, B., Brauers, T., Dorn, H., Haseler, R., Holland, F., Kaminski, M., Li, X., Lu, K., Nehr, S. Tilmann, R., Wegener, R., and Wahner, A.: Experimental evidence for efficient hydroxyl radical regeneration in isoprene oxidation, Nat. Geosci., 6, 1023–1025, 2013.
Gao, S., Surratt, J., Knipping, E., Edgerton, E., Shahgholi, and Seinfeld, J.: Characterization of polar organic components in fine aerosols in the Southeastern United States: identity, origin and evolution, J. Geophys. Res.-Atmos., 111, D14314, https://doi.org/10.1029/2005JD006601, 2006.
Goldan, P., Kuster, W., Fehsenfeld, F., and Montzka, S.: Hydrocarbon measurements in the southeastern United States: the rural oxidants in the southern environment (ROSE) program 1990, J. Geophys. Res.-Atmos., 100, 25945–25963, 1995.
Goldan, P., Parrish, D., Kustler, W., Trainer, M., McKeen, S., Holloway, J., Jobson, B., Sueper, F., and Fehsenfeld, F.: Airborne measurements of isoprene, CO and anthropogenic hydrocarbon and their implications, J. Geophys. Res.-Atmos., 105, 9091–9105, 2000.
Grosjean, D. and Friedlander, S.: Formation of organic aerosols from cyclic olefins and diolefins, in: The Character and Origins of Smog Aerosols, edited by: Hidy, G. M., Mueller, P. K., Grosjean, D., Appel, B., Wesolowski, J., Wiley Interscience, NY, 434–476, 1980.
Guenther, A., Zimmerman, P., Harley, P., Manson, R., and Fall, R.: Isoprene and monoterpene emission rate variability: model evaluations and sensitivity analyses, J. Geophys. Res.-Atmos., 98, 12609–12617, 1993.
Hagerman, L., Aneja, V., and Lonneman, W.: Characterization of non-methane hydrocarbons in the rural southeast United States, Atmos. Environ., 31, 4017–4038, 1997.
Haines, T. K., Busby, R., and Cleaves, D.: Prescribed burning in the south: trends, purpose and barriers, South. J. Appl. For., 25, 149–153, 2007.
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.
Hansen, D. A., Edgerton, E., Hartsell, B., Jansen, J., Hidy, G., Kandaswamy, K., and Blanchard, C. L.: The Southeastern Aerosol Research and Characterization study (SEARCH): 1. Overview, JAPCA J. Air Waste Ma., 53, 1460–1471, 2003.
Hansen, D. A., Edgerton, E., Hartsell, B., Jansen, J., Burge, H., Koutrakis, P., Rogers, C., Suh, C., Chow, J., Zielinska, B., McMurry, P., Mulholland, J., Russell, A., and Rasmussen, R.: Air quality measurements for the aerosol research and inhalation epidemiology study, JAPCA J. Air Waste Ma., 56, 1445–1458, 2006.
Hatch, L., Creaman, J., Ault, A., Surratt, J., Chan, J., Seinfeld, J., Edgerton, E., Su, Y., and Prather, K.: Measurements of isoprene-derived organosulfates in ambient aerosols by aerosol time of flight mass spectrometery Part 1: Single particle atmospheric observaions in Atlanta, Environ. Sci. Technol., 45, 5105–5111, 2011.
Hidy, G. M.: Atmospheric Sulfur and Nitrogen Oxides: Eastern North American Source-Receptor Relationships, Academic Press, San Diego, CA, 1994.
Hidy, G. M.: Ozone process insights from field experiments, Part 1. Overview, Atmos. Environ., 34, 2001–2022, 2000.
Hidy, G. M.: Worldwide aerosol chemistry: from hemispheric distributions to megacity sources, JAPCA J. Air Waste Ma., 59, 770–789, 2009.
Hidy, G. M. and Blanchard, C. L.: The North American background aerosol and global aerosol variation, JAPCA J. Air Waste Ma., 55, 1585–1599, 2005.
Hoffman, M., Waldman, J., Munger, J., and Jacob, D.: 1986. The chemistry and physics of acid fog, clouds and haze aerosol, in: Aerosols: Research, Risk Assessment and Control Strategies, edited by: Lee, S., Schneider, T., Grant, L., and Verkerk, J., Lewis Publishers, Inc., Ann Arbor, MI, 121–150, 1986.
Hunt, S.: Southern Atmosphere Study (SAS): Research Partnership Advancing the Science of Organic Aerosols, Air, Climate and Energy Research Program, US Environmental Protection Agency, Research Triangle Park, NC, 2013.
Ingram, K., Dow, K., Carter, L. Anderson, J. (Eds.): Climate in the Southeastern United States: Variability, Change, Impacts and Vulnerability, Island Press, Washington DC, 2013.
Irving, P. (Ed.): Acidic Deposition: State of Science and Technology .1 Emissions, Atmospheric Processes and Deposition, National Acid Precipitation Program, Washington DC, 1991.
Kleindienst, T., Lewandowski, M., Offenberg, J., Edney, E., Jaoui, M., Zheng, M., Ding, X., and Edgerton, E.: Contribution of primary and secondary sources to organic aerosols at SEARCH network sites, JAPCA J. Air Waste Ma., 60, 1388–1399, 2010.
Larkin, N., Raffuse, S., and Strand, T.: Wildfire emissions, carbon, and climate: US emissions inventories, Forest Ecol., and Manage., 317, 61–69, https://doi.org/10.1016/j.foreco.2013.09.012, 2013.
Lee, S., Baumann, K., Schauer, J., Sheesley, R., Naeher, L. Meinardi, S., Blake, D., Edgerton, E., Russell, A., and Clements, M.: Gaseous and particulate emissions from prescribed burning in Georgia, Environ. Sci. Technol., 39, 9049–9056, 2005.
Lee, S., Liu, Wand, Y., Russell, A., and Edgerton, E.: Source apportionment of PM2.5: Comparing PMF and CMB results for four ambient monitoring sites in the southeastern United States, Atmos. Environ., 42, 4126–4137, 2010.
Lefohn, A., Emert, C., Shadwick, D., Wernli, H., Jung, J., and Oltmans, S.: Estimates of background surface ozone concentrations in the United States based on model-derived source apportionment, Atmos. Environ., 84, 275–288, https://doi.org/10.1016/jatmosenv.2013.11.033, 2014.
Lim, H. and Turpin, B.: Origins of primary and secondary organic aerosol in Atlanta: results of time-resolved measurements during the Atlanta supersite experiment, Environ. Sci. Technol., 36, 4489–4496, 2002.
Lin, Y.-H., Knipping, E. M., Edgerton, E. S., Shaw, S. L., and Surratt, J. D.: Investigating the influences of SO2 and NH3 levels on isoprene-derived secondary organic aerosol formation using conditional sampling approaches, Atmos. Chem. Phys., 13, 8457–8470, https://doi.org/10.5194/acp-13-8457-2013, 2013.
Lowenthal, D., Zielinska, B., Mason, B., Samy, S., Samburova, V., Collins, D., Spencer, C., Taylor, J., Allen, J., and Kumar, N.: Aerosol characterization studies at Great Smoky Mountains National Park, summer 2006, J. Geophys. Res.-Atmos., 114, D8206, https://doi.org/10.1029/2008JD011274, 2009.
Malm, W., Day, D., and Kreidenweis, S.: Light scattering characteristics of aerosols at ambient and as a function of relative humidity, Part II – A comparison of measured scattering and aerosol concentrations using statistical models, JAPCA J. Air Waste Ma., 50, 701–709, 2000.
Marmur, A., Park, S. K., Mulholland, J. A., Tolbert, P. E., and Russell, A. G.: Source apportionment of PM2.5 in the southeastern United States using receptor and emissions based models: conceptual differences and implications for time-series health studies, Atmos. Environ., 40, 2533–2551, 2006.
Marmur, A, Liu, W., Wang, Y., Russell, A. G., and Edgerton, E. S.: Evaluation of model simulated atmospheric constituents with observations in the factor projected space: CMAQ simulations of SEARCH measurements, Atmos. Environ., 43, 1839–1849, 2009.
Martinez, M., Harder, H., Kovacs, T., Simpas, J., Bassis, J., Lesher, R., Brune, W., Frost, G., Williams, E., Stroud, C., Jobson, B., Roberts, J., Hall, S., Shetter, R., Wert, B. Fried, A., Alicke, B., Stutz, J., Young, V., White, A., and Zamara, R.: OH and HO2 concentrations, sources and loss rates during the Southern Oxidants Study in Nashville, Tennessee, summer 1999, J. Geophys. Res-Atmos., 108, 4617, https://doi.org/10.1029/2003JD003551, 2003.
McMurry, P., Shepherd, M., and Vickery, J. (Eds.): Particulate Matter Science for Policy Makers, Cambridge University Press, Cambridge, UK, 283–319, 2004.
McNider, R., Norris, W., Song, A., Clymer, R., Gupta, S., Banta, R., Zamara, R., and White, A.: Meteorological conditions during the 1995 Southern Oxidants Study Nashville Middle Tennesssee Field Intensive, J. Geophys. Res.-Atmos., 103, 22225–22243, 1998.
Meagher, J., Cowling, E., Fehsenfeld, F., and Parkhurst, W.: Ozone formation and transport in southeasterm United States: overview of the SOS Nashville/Middle Tennessee Study, J. Geophys. Res.-Atmos., 103, 22213–22223, 1998.
Morris, R. E., McNally, D. E., Tesche, T. W., Tonnesen, G., Boylan, J. W., and Brewer, P.: Preliminary evaluation of the community multiscale air quality model for 2002 over the southeastern United States, JAPCA J. Air Waste Ma., 55, 1694–1708, 2005.
National Atmospheric and Oceanic Administration (NOAA).: Southeast Nexus (SENEX): Studying the Interactions between Natural and Anthropogenic Emissions at the Nexus of Air Quality and Climate Change, NOAA, Boulder, CO, available at: http://www.esrl.noaa.gov/csd/projects/senex/, last access: 20 November 2013.
Nguyen, T. B., Coggon, M. M., Bates, K. H., Zhang, X., Schwantes, R. H., Schilling, K. A., Loza, C. L., Flagan, R. C., Wennberg, P. O., and Seinfeld, J. H.: Organic aerosol formation from the reactive uptake of isoprene epoxydiols (IEPOX) onto non-acidified inorganic seeds, Atmos. Chem. Phys., 14, 3497–3510, https://doi.org/10.5194/acp-14-3497-2014, 2014.
Novakov, T., Mueller, P., Alcocer, A., and Otvos, J.: 1972. Chemical composition of Pasadena aerosol by particle size and time of day: III. Chemical states of nitrogen and sulfur by photoelectron spectroscopy, in: Aerosols and Atmospheric Chemistry, edited by: Hidy. G., Academic Press, New York, 285–294, 1972.
O'Brien, R., Crabtree, J., Holmes, J., Hoggan, M., and Bockian, A.: Formation of photochemical aerosol from hydrocarbons: atmospheric analysis, Environ. Sci. Technol., 9, 577–582, 1975.
Pachon, J. E., Balachandran, S., Hu, Y., Weber, R. J., Mulholland, J. A., and Russell, A. G.: Comparison of SOC estimates and uncertainties from aerosol chemical composition and gas phase data in Atlanta, Atmos. Environ., 44, 3907–3914, 2010.
Peterson, T., Karl., T., Kossin, J., Kunkel, K., Lawrimore, J., McMahon, J., Vose, R., and Yin, X.: Changes in weather and climate extremes: state of knowledge relevant to air and water quality in the United States, JAPCA J. Air Waste Ma., 64, 184–197, 2014.
Pitchford, M., Malm, W., Schichtel, B., Kumar, N., Lowewnthal, D., and Hand, J.: Revised algorithm for estimating light extinction from IMPROVE particle speciation data, JAPCA J. Air Waste Ma., 57, 1326–1336, 2007.
Pun, B., Seigneur, C., Bailey, E., Gautney, L., Douglas, S., Haney, J., and Kumar, N.: Response of atmospheric particulate matter to changes in precursor emissions: a comparison of three air quality models, Environ. Sci. Technol., 42, 831–837, 2008.
Pun, B. K. and Seigneur, C.: Organic aerosol spatial/temporal patterns: perspectives of measurements and model, Environ. Sci. Technol., 42, 7287–7293, 2008.
Rao, S. T., Zurbenko, I., Neagu, R., Porter, P., Ku, J., and Hentry, R.: Space and time scales in ambient ozone data, B. Am. Meteorol. Soc., 78, 2153–2166, 1997.
Ren, X., Harde, H., Martinez, M., Lesher, R., Oliger, A., Simpas, J., Brune, W., Schwab, J., Demerjian, K., He, Y., Zhou, X., and Gao, H.: OH and HO2 chemistry in the urban atmosphre of New York City, Atmos. Environ., 37, 3639–3651, 2003.
Riemer, D., Pos, W., Milne, P., Farmer, C., Zika, R., Apel, E., Olszyna, K., Kleindienst, T., Lonneman, W., Bertman, S., Shepson, P., and Starn, T.: Observations of nonmethane hydrocarbons and oxygenated volatile organic compounds at a rural site in the southeastern United States, J. Geophys. Res.-Atmos., 103, 28111–28128, 1998.
Saylor, R., Edgerton, E., and Hartsell, B.: Linear regression techniques for use in the EC tracer method of secondary organic aerosol estimation, Atmos. Environ., 40, 7546–7556, 2006.
Seinfeld, J. and Pandis, S.: Atmospheric Chemistry and Physics: from Air Pollution to Climate Change, Wiley Interscience, New York, 1998.
Sharkey, T., Wiberley, A., and Donohue, A.: Isoprene emissions from plants: why and how? Ann. Bot., 10, 5–18, 2008.
Shen, X., Zhao, Y., Chen, Z., and Huang, D.: Heterogeneous reactions of volatile organic compounds in the atmosphere, Atmos. Environ., 68, 297–314, 2013.
Solomon, P., Cowling, E., Hidy, G. M., and Furness, C.: Comparison of scientific findings from major ozone field studies in North America and Europe, Atmos. Environ., 34, 1885–1920, 2000.
Solomon, P., Chameides, W., Weber, R., Middlebrook, A., Kiang, C., Russell, A., Butler, A., Turpin, B., Mikel, D., Scheffe, R., Cowling, E., Edgerton, E., St. John, J., Jansen, J., McMurry, P., Hering, S., and Bahadori, T.: Overview of the 1999 Atlanta supersite project, J. Geophys. Res.-Atmos., 108, 8413, https://doi.org/10.1029/2001JD001458, 2003.
Southern Appalachian Mountain Intitiatve (SAMI): Final Report and Summary, avaliable at: http://www.nature.nps.gov/air/pubs/pdf/SAMI_Final_Report_0802.pdf (last access: 10 January 2014), 2012.
Southern Oxidants Study (SOS) 1988–2003: Climatology of Ozone and Ozone Precursors, available at: www.ncsu.edu/sos/ii.html, last access: 15 January, 2014.
Surratt, J., Kroll, J., Kleindienst, T., Edney, E., Claeys, M., Sorooshian, A., Ng, N., Offenberg, J., Lewandowski, M., Jaoui, M., Flagan, R., and Seinfeld, J.: Evidence of organosulfates in secondary organic aerosol, Environ. Sci. Technol., 41, 517–527, 2007.
Takahama, S., C. Davidson, and Pandis, S.: Semicontinuous measurements of organic carbon and acidity during the Pittsburgh Air Quality Study: implications for acid-catalyzed organic aerosol formation, Environ. Sci. Technol., 40, 2191–2199, 2006.
Tanner, R., Olszyna, K., Edgerton, E., Knipping, E., and Shaw, S.: Searching for evidence of acid-catalyzed enhancement of secondary organic aerosol formation using ambient aerosol data, Atmos. Environ., 43, 3440–3444, 2009.
Tesche, T. W., Morris, R., Tonnesen, G., McNally, D., Boylan, J., and Brewer, P.: CMAQ/CAMx annual 2002 performance evaluation over the eastern US, Atmos. Environ., 40, 4906–4919, 2006.
University Corporation for Atmospheric Research (UCAR): Southern Atmosphere Study, available at: https://www.eol.ucar.edu/field_projects/sas, last access: 29 April 2014.
Vukovich, F.: Boundary layer ozone variations in the eastern United States and their association with meteorological variations: long-term variations, J. Geophys. Res.-Atmos., 99, 16839–16850, 1994.
Vukovich, F.: Aspects of subregional variations in the SOS region, Atmos. Environ., 32, 3881–3889, 1998.
Wade, D. D., Brock, C., Brose, P., Grace, J., Hoch, G. and Patterson, G.: Fire in eastern ecosystems, in: Wildland Fire in Ecosystems: Effects of Fire on Flora, edited by: Brown, J. and Smith, J.-K., Rep. RMRS-42, US Forest Service, Rocky Mountain Research Station, Ogden, UT, 2000.
Went, F.: Organic matter in the atmosphere and its possible relation to petroleum formation, P. Natl. Acad. Sci. USA, 46, 212–221, 1960.
White, A., Templeman, B., Angevine, W., Zamora, R., King, W., Russell, C., Banta, R., Brewer, W., and Olszayna, K: Regional contrast in morning transitions observed during the 1999 Southern Oxidants Study Nashville/Middle Tennessee Intensive, J. Geophys. Res.-Atmos., 107, ACL21-1–ACL21-12, https://doi.org/10.1029/2001JD002036, 2002.
Xing, J., Pleim, J., Mathur, R., Pouliot, G., Hogrefe, C., Gan, C.-M., and Wei, C.: Historical gaseous and primary aerosol emissions in the United States from 1990 to 2010, Atmos. Chem. Phys., 13, 7531–7549, https://doi.org/10.5194/acp-13-7531-2013, 2013.
Yu, S., Bhave, P. V., Dennis, R. L., and Mathur, R.: Seasonal and regional variations of primary and secondary organic aerosols over the continental United States: semi-empirical estimates and model evaluation, Environ. Sci. Technol., 41, 4690–4697, 2007.
Zhang, J. and Rao, S.: The role of vertical mixing in the temporal evolution of ground-level ozone concentrations, J. Appl. Meteorol., 38, 1674–1691, 1999.
Zhang, X., Hecobian, A., Zheng, M., Frank, N. H., and Weber, R. J.: Biomass burning impact on PM2.5 over the southeastern US during 2007: integrating chemically speciated FRM filter measurements, MODIS fire counts and PMF analysis, Atmos. Chem. Phys., 10, 6839–6853, https://doi.org/10.5194/acp-10-6839-2010, 2010.
Zhang, Y., Pun, B., Wu, S. Y., Vijayaraghavan, K., and Seigneur, C.: Application and evaluation of two air quality models for particulate matter for a southeastern US episode, JAPCA J. Air Waste Ma., 54, 1478–1493, 2004.
Zheng, M., Cass, G., J. Schauer, and Edgerton, E.: Source apportionment of PM2.5 in the southeastern United States using solvent extractable organic compounds, Environ. Sci. Technol., 36, 2361–2371, 2002.
Zheng, M., Ke, L., Edgerton, E. S., Schauer, J. J., Dong, M. Y., and Russell, A. G.: Spatial distribution of carbonaceous aerosol in the southeastern United States using molecular markers and carbon isotope data, J. Geophys. Res.-Atmos., 111, D10S06, https://doi.org/10.1029/2005JD006777, 2006.
Short summary
This paper reviews aerometric measurements from Centreville, Alabama. The measurements show annual trends with air pollution emissions from 1999 to 2013. They provide a context for observations from 1 June to 15 July 2013 supporting the Southern Oxidant and Aerosol Study. An important goal of this experiment was to advance knowledge of aerosols produced in the atmosphere from precursors. The observations were in moist and warm conditions with the lowest gas and particle concentrations recorded.
This paper reviews aerometric measurements from Centreville, Alabama. The measurements show...
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