Saturation levels of methyl bromide in the coastal waters off Tasmania

G A Sturrock; C E Reeves; G P Mills; S A Penkett; C R Parr; A A McMinn; G Corno; Neil W Tindale; P J Fraser

doi:10.1029/2002GB002024

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Saturation levels of methyl bromide in the coastal waters off Tasmania

Journal article

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Saturation levels of methyl bromide in the coastal waters off Tasmania

G A Sturrock, C E Reeves, G P Mills, S A Penkett, C R Parr, A A McMinn, G Corno, Neil W Tindale and P J Fraser

Global Biogeochemical Cycles, Vol.17(4)

2003

DOI: https://doi.org/10.1029/2002GB002024

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Abstract

coastal waters

methyl bromide

saturation levels in coastal waters

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.

Details

Title: Saturation levels of methyl bromide in the coastal waters off Tasmania
Authors: G A Sturrock (Author) - University of East Anglia, United Kingdom
C E Reeves (Author) - University of East Anglia, United Kingdom
G P Mills (Author) - University of East Anglia, United Kingdom
S A Penkett (Author) - University of East Anglia, United Kingdom
C R Parr (Author) - CSIRO Atmospheric Research
A A McMinn (Author) - University of Tasmania
G Corno (Author) - University of Tasmania
Neil W Tindale (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
P J Fraser (Author) - CSIRO Atmospheric Research
Publication details: Global Biogeochemical Cycles, Vol.17(4)
Publisher: American Geophysical Union
Date published: 2003
DOI: 10.1029/2002GB002024
ISSN: 0886-6236
Copyright note: Copyright © 2003 American Geophysical Union. The published version is reproduced here in accordance with the publisher's copyright policy.
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99450008102621
Output Type: Journal article

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