Saturation levels of methyl bromide in coastal waters off Tasmania

Sturrock, GA, Reeves, CE ORCID: https://orcid.org/0000-0003-4071-1926, Penkett, SA, Parr, CR, McMinn, A, Corno, G, Tindale, NW and Fraser, PJ (2003) Saturation levels of methyl bromide in coastal waters off Tasmania. Global Biogeochemical Cycles, 17 (4). p. 1101. ISSN 1944-9224

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Abstract

Methyl bromide (CH3Br) was highly supersaturated for over 2 years in the surface coastal seawater off Tasmania. Persistent supersaturations were observed near to shore throughout the year with no evidence of a seasonal cycle. At the same time, a site farther offshore (still under coastal influence) was also predominantly supersaturated but to a lesser extent. Notably, the annual pattern varied over the consecutive years covered in this systematic study. The observed supersaturations are in broad agreement with that which would be predicted by the relationships with the sea surface temperature (SST) derived by Groszko and Moore [1998] and King et al. [2000] for SSTs in the range of 12° to 20°C, although not the seasonal variation predicted by King et al. [2002]. There is much variability, as expected, which is not explained by the SST relationships. The presence of the prymnesiophyte Phaeocystis is found to be related to the seawater concentrations of CH3Br in this work. Our results tentatively indicate that the release of CH3Br into the seawater may be a response to nitrate limiting conditions.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups: Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017)
Faculty of Science > Research Groups > Atmospheric Chemistry (former - to 2018)
Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences (former - to 2017)
Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Depositing User: Rachel Snow
Date Deposited: 10 Jun 2011 10:35
Last Modified: 20 Mar 2023 09:34
URI: https://ueaeprints.uea.ac.uk/id/eprint/32214
DOI: 10.1029/2002GB002024

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