Distribution of biogenic sulphur compounds during and just after the southwest monsoon in the Arabian Sea

Hatton, Angela D., Malin, Gill ORCID: https://orcid.org/0000-0002-3639-9215 and Liss, Peter S. (1999) Distribution of biogenic sulphur compounds during and just after the southwest monsoon in the Arabian Sea. Deep-Sea Research Part II: Topical Studies in Oceanography, 46 (3-4). pp. 617-632. ISSN 1879-0100

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Abstract

The Arabian Sea is characterised by strong seasonal oscillations of biological productivity generated by its monsoonal climate. The southwest monsoon causes reversal in the surface circulation of the Arabian Sea, which generates a seasonal upwelling of nutrient-rich waters along the coast of Oman. Concentrations of biogenic sulphur compounds were measured on a transect from the eutrophic waters off the coast of Oman to the oligotrophic waters of the open Arabian Sea, during the UK NERC Arabesque cruise 27 August-4 October 1994. The concentrations of dimethylsulphide (DMS), dimethylsulphoxide (DMSO) and dimethylsulphoniopropionate (DMSP) were found to be elevated in the eutrophic area due to enhanced biological production. However, this increase in DMS, DMSO and DMSP concentration was not observed until after the southwest monsoon had relaxed, and appeared to correspond to increased concentrations of hexanoyloxyfucoxanthin, an indicator of prymnesiophytes. DMSO concentrations were correlated with those of DMS and DMSP in the near surface waters of the Arabian Sea. Additionally, DMSO appeared to be ubiquitous throughout the water column, being easily detectable in deep waters, which suggests that DMSO may act as a sink for DMS in the world's oceans.

Item Type:	Article
Uncontrolled Keywords:	sdg 13 - climate action ,/dk/atira/pure/sustainabledevelopmentgoals/climate_action
UEA Research Groups:	Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Science > Research Groups > Climatic Research Unit
Depositing User:	Rosie Cullington
Date Deposited:	06 Jun 2011 14:27
Last Modified:	16 Jun 2023 23:52
URI:	https://ueaeprints.uea.ac.uk/id/eprint/31859
DOI:	10.1016/S0967-0645(98)00120-9

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