Contribution of isoprene oxidation products to marine aerosol over the north-east atlantic
Anttila, Tatu Langmann, Baerbel Varghese, Saji O'Dowd, Colin
Anttila, Tatu
Langmann, Baerbel
Varghese, Saji
O'Dowd, Colin
Repository DOI
Publication Date
2010-01-01
Type
Article
Downloads
Citation
Anttila, Tatu; Langmann, Baerbel; Varghese, Saji; O'Dowd, Colin (2010). Contribution of isoprene oxidation products to marine aerosol over the north-east atlantic. Advances in Meteorology ,
Abstract
Secondary organic aerosol (SOA) formation through isoprene oxidation was investigated with the regional-scale climate model REMOTE. The applied modeling scheme includes a treatment for marine primary organic aerosol emissions, aerosol microphysics, and SOA formation through the gas/particle partitioning of semivolatile, water-soluble oxidation products. The focus was on SOA formation taking place over the North-East Atlantic during a period of high biological activity. Isoprene SOA concentrations were up to similar to 5ng m(-3) over North Atlantic in the base case model runs, and isoprene oxidation made a negligible contribution to the marine organic aerosol (OA) mass. In particular, isoprene SOA did not account for the observed water-soluble organic carbon (WSOC) concentrations over North Atlantic. The performed model calculations, together with results from recent field measurements, imply a missing source of SOA over remote marine areas unless the isoprene oxidation products are considerably less volatile than the current knowledge indicates.
Funder
Publisher
Hindawi Limited
Publisher DOI
10.1155/2010/482603
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland