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Variability of atmospheric dimethylsulphide over the southern Indian Ocean due to changes in ultraviolet radiation
Author(s) -
Kniveton D. R.,
Todd M. C.,
Sciare J.,
Mihalopoulos N.
Publication year - 2003
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/2003gb002033
Subject(s) - biogeochemical cycle , photosynthetically active radiation , environmental science , biogeochemistry , atmospheric sciences , dimethylsulfoniopropionate , sulfur cycle , climatology , forcing (mathematics) , oceanography , satellite , sulfur , environmental chemistry , chemistry , phytoplankton , ecology , biology , geology , photosynthesis , botany , nutrient , organic chemistry , aerospace engineering , engineering
Dimethylsulphide (DMS) is a climatically important component of global biogeochemical cycles, through its role in the sulphur cycle. Changes in ultraviolet radiation (UV) exhibit both positive and negative forcings on the dynamics of production and turnover of DMS and its precursor dimethylsulphoniopropionate (DMSP). In this study we investigate the net forcing of UV on atmospheric DMS. The work is based on a 10‐year record of observed DMS at Amsterdam Island in the southern Indian Ocean, and satellite‐based retrievals of surface UV and photosynthetically active radiation (PAR). The results show an inverse relationship between UV radiation and atmospheric DMS associated with extreme changes (defined as the greatest 5%) in daily UV, independent of changes in wind speed, sea surface temperature, and PAR.