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.
| Original language | English (Ireland) |
|---|---|
| Number of pages | 0 |
| Journal | Adv Meteorol |
| Publication status | Published - 1 Jan 2010 |
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- Anttila, T,Langmann, B,Varghese, S,O'Dowd, C
- Anttila, T;Langmann, B;Varghese, S;O'Dowd, C