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Abstract

Dimethylsulphide (DMS) is an important sulphur-containing atmospheric trace gas of marine biogenic origin. DMS emitted from the oceans may be a precursor of tropospheric aerosols and cloud condensation nuclei (CCN) thereby affecting the earth's radiative balance and possibly constituting a negative feedback to global warming, although this is still somewhat controversial. The revised conceptual model of the marine pelagic food web gives a central role to bacteria and recent experiments have shown that consumption of dissolved DMS by microbial metabolism may be more important than atmospheric exchange in controlling its concentration in surface waters and hence its ventilation to the atmosphere. In this paper the effect of the marine food web on the cycling of dissolved DMS in surface waters during a phytoplankton bloom episode is investigated. A simulation model was used to investigate the relative importance of the various biological and chemical processes involved.

Additional information

Authors: GABRIC A, JRC Ispra (IT);MURRAY C N, JRC Ispra (IT);KOHL M, JRC Ispra (IT);STONE L, Griffith University, Division of Environmental Sciences, Nathan (AU)
Bibliographic Reference: Paper presented: International Symposium on Dimethylsulphide Oceans Atmosphere and Climate, Belgirate (DK), October 13-15, 1992
Availability: Available from (1) as Paper EN 37370 ORA
Record Number: 199310495 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en