Qi Zhang (Author), Jose L. Jimenez (Author), M. R. Canagaratna (Author), J. David Allan (Author), H. Coe (Author), I. M. Ulbrich (Author), M. R. Alfarra (Author), A. Takami (Author), A. M. Middlebrook (Author), Katja Džepina (Author)

Abstract

Organic aerosol (OA) data acquired by the Aerosol Mass Spectrometer (AMS) in 37 field campaigns were deconvolved into hydrocarbon-like OA (HOA) and several types of oxygenated OA (OOA) components. HOA has been linked to primary combustion emissions (mainly from fossil fuel) and other primary sources such as meat cooking. OOA is ubiquitous in various atmospheric environments, on average accounting for 64%, 83% and 95% of the total OA in urban, urban downwind, and rural/remote sites, respectively. A case study analysis of a rural site shows that the OOA concentration is much greater than the advected HOA, indicating that HOA oxidation is not an important source of OOA, and that OOA increases are mainly due to SOA. Most global models lack an explicit representation of SOA which may lead to significant biases in the magnitude, spatial and temporal distributions of OA, and in aerosol hygroscopic properties.

Keywords

atmospheric aerosol;secondary organic aerosols;primary organic aerosols;aerodyne aerosol mass spectrometer;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 54
COBISS: 59052547 Link will open in a new window
ISSN: 0094-8276
Views: 1396
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Other data

URN: URN:SI:UNG
Pages: str. 1-6
Volume: ǂVol. ǂ34
Issue: ǂiss. ǂ13
Chronology: 2007
DOI: 10.1029/2007GL029979
ID: 12757744