Repository of University of Nova Gorica

Show document
A+ | A- | SLO | ENG

Title:Secondary organic aerosol formation from semi- and intermediate-volatility organic compounds and glyoxal : relevance of O/C as a tracer for aqueous multiphase chemistry
Authors:Waxman, Eleanor M. (Author)
Džepina, Katja (Author)
Ervens, Barbara (Author)
Lee-Taylor, Julia (Author)
Aumont, Bernard (Author)
Jimenez, Jose L. (Author)
Madronich, Sasha (Author)
Volkamer, Rainer (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 role of aqueous multiphase chemistry in the formation of secondary organic aerosol (SOA) remains difficult to quantify. We investigate it here by testing the rapid formation of moderate oxygen-to-carbon (O/C) SOA during a case study in Mexico City. A novel laboratory-based glyoxal-SOA mechanism is applied to the field data, and explains why less gas-phase glyoxal mass is observed than predicted. Furthermore, we compare an explicit gas-phase chemical mechanism for SOA formation from semi- and intermediate-volatility organic compounds (S/IVOCs) with empirical parameterizations of S/IVOC aging. The mechanism representing our current understanding of chemical kinetics of S/IVOC oxidation combined with traditional SOA sources and mixing of background SOA underestimates the observed O/C by a factor of two at noon. Inclusion of glyoxal-SOA with O/C of 1.5 brings O/C predictions within measurement uncertainty, suggesting that field observations can be reconciled on reasonable time scales using laboratory-based empirical relationships for aqueous chemistry.
Keywords:secondary organic aerosol, glyoxal, aqueous multiphase chemistry, oxygen-to-carbon ratio, single scattering albedo
Year of publishing:2013
Number of pages:str. 978-982
Numbering:iss. 5, Vol. 40
COBISS_ID:59044867 Link is opened in a new window
UDC:54
ISSN on article:0094-8276
URN:URN:SI:UNG:REP:MLS5EVLQ
DOI:10.1002/grl.50203 Link is opened in a new window
Views:758
Downloads:0
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:Document is not linked to any category.
:
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

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

Back