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Abstract

Dimethylsulphide (DMS), emitted from phytoplankton in the oceans, is the major natural source if sulphur to the atmosphere. It has been proposed that DMS could be a major source of sulphate aerosols over the oceans and thus may have a significant influence on the Earth's radiation budget and climate.

In the atmosphere, DMS is believed to be removed mainly by the daytime reaction with the hydroxyl radical (OH), by the night-time reaction with the nitrate radical and by reaction with halogen oxides. There is strong evidence for the assumption that there exist 2 parallel pathways for the reaction between DMS and OH radicals: H-abstraction and OH-addition to the sulphur atom. In the present study, the formation of products presumably generated by the addition pathway of the reaction between OH and DMS, dimethylsulphoxide (DMSO) and methanesulphinic acid (MSIA), has been studied. .

Additional information

Authors: SØRENSEN S, JRC Ispra (IT);FALBE-HANSEN H, JRC Ispra (IT);MANGONI M, JRC Ispra (IT);HJORTH J, JRC Ispra (IT);JENSEN N R, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Strasbourg (FR), September 1995
Availability: Available from (1) as Paper EN 39311 ORA
Record Number: 199512157 / Last updated on: 1996-01-26
Category: PUBLICATION
Original language: en
Available languages: en