Ubiquity and dominance of oxygenated species in organic aerosols in anthropogenically-influenced Northern Hemisphere midlatitudes
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.
2007
2021-04-11 15:57:06
1033
atmospheric aerosol, secondary organic aerosols, primary organic aerosols, aerodyne aerosol mass spectrometer
Q.
Zhang
70
Jose L.
Jimenez
70
M. R.
Canagaratna
70
J. David
Allan
70
H.
Coe
70
I. M.
Ulbrich
70
M. R.
Alfarra
70
A.
Takami
70
A. M.
Middlebrook
70
Katja
Džepina
70
COBISS_ID
3
59052547
UDK
4
54
ISSN pri članku
9
0094-8276
DOI
15
10.1029/2007GL029979
NUK URN
18
URN:SI:UNG:REP:XWS1YE2P
Zhang_GRL_2007.pdf
1210788
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