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Title:Secondary organic aerosol formation from anthropogenic air pollution : rapid and higher than expected
Authors:Volkamer, Rainer (Author)
Jimenez, Jose L. (Author)
San Martini, F. M. (Author)
Džepina, Katja (Author)
Zhang, Q. (Author)
Salcedo, Dara (Author)
Molina, Luisa T. (Author)
Worsnop, D. (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Unknown ()
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The atmospheric chemistry of volatile organic compounds (VOCs) in urban areas results in the formation of 'photochemical smog', including secondary organic aerosol (SOA). State-of-the-art SOA models parameterize the results of simulation chamber experiments that bracket the conditions found in the polluted urban atmosphere. Here we show that in the real urban atmosphere reactive anthropogenic VOCs (AVOCs) produce much larger amounts of SOA than these models predict, even shortly after sunrise. Contrary to current belief, a significant fraction of the excess SOA is formed from first-generation AVOC oxidation products. Global models deem AVOCs a very minor contributor to SOA compared to biogenic VOCs (BVOCs). If our results are extrapolated to other urban areas, AVOCs could be responsible for additional 3 - 25 Tg yr(-1) SOA production globally, and cause up to - 0.1 W m(-2) additional top-of-the-atmosphere radiative cooling.
Keywords:atmospheric aerosol, atmospheric chemistry, volatile organic compounds, secondary organic aerosols
Year of publishing:2006
Number of pages:str. 1-4
Numbering:iss. 17, Vol. 33
COBISS_ID:59094787 Link is opened in a new window
UDC:54
ISSN on article:0094-8276
URN:URN:SI:UNG:REP:01PMLOON
DOI:10.1029/2006GL026899 Link is opened in a new window
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Record is a part of a journal

Title:Geophysical research letters
Shortened title:Geophys. res. lett.
Publisher:American Geophysical Union.
ISSN:0094-8276
COBISS.SI-ID:16168965 New window

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