UNSPECIFIED (1991) MICROBIAL-DEGRADATION OF METHANESULFONIC-ACID - A MISSING LINK IN THE BIOGEOCHEMICAL SULFUR CYCLE. Nature, 350 (6319). pp. 627-628. ISSN 0028-0836.

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Abstract

ATMOSPHERIC dimethyl sulphide, arising from marine algae, cyanobacteria and salt marsh plants such as Spartina, is the principal sulphur compound entering the atmosphere from terrestrial and aquatic environments 1-6. Methanesulphonic acid (CH3SO3H; MSA) has been identified as a major product of the photochemical oxidation in the atmosphere of dimethyl sulphide 1-3, 5, 7-9. Dimethyl sulphide and MSA are thus predominantly, if not exclusively, biogenic in origin, and are the main gaseous links in the biogeochemical sulphur cycle. MSA is a stable compound, not undergoing photochemical decomposition 3, so its removal from the atmosphere is by wet and dry deposition. MSA partitions into the aerosol phase, as well as nucleating droplet formation, and is deposited in rain and snow. Analysis of Antarctic ice cores 10 gives evidence of its global deposition over many thousands of years. The subsequent fate of MSA deposited on land was unknown. Here we describe terrestrial bacteria that grow on MSA. Their activities in the natural environment would result in the mineralization of MSA to carbon dioxide and sulphate, thus completing our understanding of this part of the sulphur cycle.

Item Type:	Journal Article
Subjects:	Q Science
Journal or Publication Title:	Nature
Publisher:	MACMILLAN MAGAZINES LTD
ISSN:	0028-0836
Official Date:	18 April 1991
Dates:	Date Event 18 April 1991 UNSPECIFIED
Volume:	350
Number:	6319
Number of Pages:	2
Page Range:	pp. 627-628
Publication Status:	Published

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