Record Details

Export fluxes of dimethylsulfoniopropionate and its break down gases at the air-sea interface

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Export fluxes of dimethylsulfoniopropionate and its break down gases at the air-sea interface
 
Creator DileepKumar, M.
Shenoy, D.M.
Sarma, V.V.S.S.
George, M.D.
Dandekar, M.
 
Subject sea water
biogenic material
aerosols
abundance
wind speed
photochemistry
air-sea interaction
dissolved gases
 
Description Dimethylsulfide (DMS) results from the decomposition of dimethylsulfoniopropionate (DMSP), a biogenic product, in seawater. Diffusive transfer of DMS from sea-to-air is known to be the most important source of natural non-seasalt sulfur (NSS) in the atmosphere. The wider occurrence of DMSP in marine aerosols has been reported for the first time. DMSP (to about 4.7 pmol m sup(-3)) and DMS (up to 5.8 pmol m sup(-3)) in marine aerosols was found, over the Indian Ocean, wherein DMSP abundance appears to be a function of its concentration in surface seawater and wind speeds. An experiment on board revealed rapid loss (90%) of loaded DMSP from filters exposed to marine atmosphere. A photochemical or other mode of formation of NSS gases from DMSP in aerosols or in surface microlayer, not considered hitherto, can directly contribute to sulfur efflux. Although the computations suggest the DMSP fluxes from these sources to be much smaller (3.4 x 10 sup(10) g S y sup(-1)) compared to DMS diffusive flux (16-25 x 10 sup(12) g S y sup(-1)) the former could be significant in rough weather conditions similar to trends in water export.
 
Date 2008-08-11T07:43:26Z
2008-08-11T07:43:26Z
2002
 
Type Journal Article
 
Identifier Geophysical Research Letters, 29(2); DOI: 10.1029/2001GL013967
http://drs.nio.org/drs/handle/2264/1431
 
Language en
 
Rights American Geophysical Union
 
Publisher American Geophysical Union