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Saturation levels of methyl bromide in the coastal waters off Tasmania


Sturrock, GA and Reeves, CE and Mills, GP and Penkett, SA and Parr, CR and McMinn, A and Corno, G and Tindale, NW and Fraser, PJ, Saturation levels of methyl bromide in the coastal waters off Tasmania, Global Biogeochemical Cycles, 17, (4) pp. 1101. ISSN 0886-6236 (2003) [Refereed Article]

DOI: doi:10.1029/2002GB002024


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. Copyright 2003 by the American Geophysical Union.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Chemical oceanography
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Oceanic processes (excl. in the Antarctic and Southern Ocean)
UTAS Author:McMinn, A (Professor Andrew McMinn)
UTAS Author:Corno, G (Mr Guido Corno)
ID Code:29161
Year Published:2003
Web of Science® Times Cited:7
Deposited By:IASOS
Deposited On:2003-08-01
Last Modified:2011-10-07

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