A simplified description of the evolution of organic aerosol composition in the atmosphere


Autoria(s): HEALD, C. L.; KROLL, J. H.; JIMENEZ, J. L.; DOCHERTY, K. S.; DECARLO, P. F.; AIKEN, A. C.; CHEN, Q.; MARTIN, S. T.; FARMER, D. K.; Artaxo Netto, Paulo Eduardo
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2010

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

http://dx.doi.org/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