Methyl iodide distribution in the ocean and fluxes to the atmosphere

被引:81
作者
Moore, RM [1 ]
Groszko, W [1 ]
机构
[1] Dalhousie Univ, Dept Oceanog, Halifax, NS B3H 4J1, Canada
关键词
D O I
10.1029/1998JC900073
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Methyl iodide concentrations have been measured in air samples, surface, and subsurface waters of the NW Atlantic, NE Atlantic, and Pacific Oceans. They are shown to be substantially oversaturated in all surface waters. Our best estimate of methyl iodide flux from the ocean to the atmosphere is 0.9 - 2.5 x 10(9) mol yr(-1), but further substantial and unquantifiable uncertainities exist because of the limited spatial and temporal data on which this flux estimate is based. Pronounced subsurface maxima in methyl iodide concentrations seen in the Pacific Ocean and the Sargasso Sea are thought to result from production and accumulation of the gas in the relatively poorly ventilated waters beneath the surface mixed layer. Our calculations suggest that latitudinal variations in methyl iodide concentrations in the Pacific Ocean are partly controlled by temperature-dependent chemical loss.
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收藏
页码:11163 / 11171
页数:9
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