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- Title
Suppression of CCN formation by bromine chemistry in the remote marine atmosphere.
- Authors
Breider, Thomas James; Chipperfield, Martyn P.; Mann, Graham W.; Woodhouse, Matthew T.; Carslaw, Ken S.
- Abstract
Using a global model, we investigate how bromine chemistry affects cloud condensation nuclei ( CCN) formation in the remote marine atmosphere. Bromine increases dimethylsulphide ( DMS) oxidation but lowers SO2 yield, leading to less sulphate aerosol. The effect is largest (3-7% decrease in total CCN and 15-30% decrease in CCN from DMS) over the summertime southern ocean, a region of strong bromine release from sea-salt. DMS and bromine emissions have a coupled feedback effect on CCN. Increased DMS enhances the release of sea-salt bromine through increased aerosol acidity. This enhanced bromine suppresses the CCN response to increased DMS by up to 30%.
- Subjects
CONDENSATION (Meteorology); BROMINE; OXIDATION; EMISSIONS (Air pollution); ATMOSPHERIC aerosol analysis
- Publication
Atmospheric Science Letters (John Wiley & Sons, Inc. ), 2015, Vol 16, Issue 2, p141
- ISSN
1530-261X
- Publication type
Article
- DOI
10.1002/asl2.539