@article {14176,
	title = {A simplified description of the evolution of organic aerosol composition in the atmosphere},
	journal = {Geophysical Research Letters},
	volume = {37},
	year = {2010},
	note = {ISI Document Delivery No.: 587YPTimes Cited: 0Cited Reference Count: 27Heald, 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, P.Nsf [atm-0929282, atm-0449815, atm-0723582]; noaa [na08oar4310565]Authors C. L. Heald and J. H. Kroll contributed equally to this work. This work was supported in part by NSF grants ATM-0929282, ATM-0449815, and ATM-0723582 and NOAA grant NA08OAR4310565. We thank A. J. Weinheimer (NCAR) for providing the MILAGRO NOx/NOy observations.Amer geophysical unionWashington},
	month = {Apr},
	pages = {L08803},
	type = {Article},
	abstract = {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.},
	keywords = {campaign, chemistry, high-resolution, mass-spectrometry, mexico-city, secondary},
	isbn = {0094-8276},
	author = {Heald, C. L. and Kroll, J. H. and Jimenez, J. L. and Docherty, K. S. and DeCarlo, P. F. and Aiken, A. C. and Q. Chen and Martin, S. T. and Farmer, D. K. and Artaxo, P.}
}
