A simplified description of the evolution of organic aerosol composition in the atmosphere
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
Organic aerosol (OA) in the atmosphere consists of a multitude of organic species which are either directly emitted or the products of a variety of chemical reactions. This complexity challenges our ability to explicitly characterize the chemical composition of these particles. We find that the bulk composition of OA from a variety of environments (laboratory and field) occupies a narrow range in the space of a Van Krevelen diagram (H: C versus O:C), characterized by a slope of similar to-1. The data show that atmospheric aging, involving processes such as volatilization, oxidation, mixing of air masses or condensation of further products, is consistent with movement along this line, producing a more oxidized aerosol. This finding has implications for our understanding of the evolution of atmospheric OA and representation of these processes in models. Citation: Heald, C. L., J. H. Kroll, J. L. Jimenez, K. S. Docherty, P. F. DeCarlo, A. C. Aiken, Q. Chen, S. T. Martin, D. K. Farmer, and P. Artaxo (2010), A simplified description of the evolution of organic aerosol composition in the atmosphere, Geophys. Res. Lett., 37, L08803, doi: 10.1029/2010GL042737. NSF[ATM-0929282] U.S. National Science Foundation (NSF) U.S. National Science Foundation (NSF) NSF[ATM-0449815] U.S. National Science Foundation (NSF) NSF[ATM-0723582] NOAA NOAA[NA08OAR4310565] |
Identificador |
GEOPHYSICAL RESEARCH LETTERS, v.37, 2010 0094-8276 http://producao.usp.br/handle/BDPI/29033 10.1029/2010GL042737 |
Idioma(s) |
eng |
Publicador |
AMER GEOPHYSICAL UNION |
Relação |
Geophysical Research Letters |
Direitos |
restrictedAccess Copyright AMER GEOPHYSICAL UNION |
Palavras-Chave | #HIGH-RESOLUTION #MASS-SPECTROMETRY #MEXICO-CITY #SECONDARY #CHEMISTRY #CAMPAIGN #Geosciences, Multidisciplinary |
Tipo |
article original article publishedVersion |