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Influence of rain on air-sea gas exchange : lessons from a model ocean

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dc.contributor.author Ho, David T.
dc.contributor.author Zappa, Christopher J.
dc.contributor.author McGillis, Wade R.
dc.contributor.author Bliven, Larry F.
dc.contributor.author Ward, Brian
dc.contributor.author Dacey, John W. H.
dc.contributor.author Schlosser, Peter
dc.contributor.author Hendricks, Melissa B.
dc.date.accessioned 2010-06-04T17:47:55Z
dc.date.available 2010-06-04T17:47:55Z
dc.date.issued 2004-07-01
dc.identifier.citation Journal of Geophysical Research 109 (2004): C08S18 en_US
dc.identifier.uri http://hdl.handle.net/1912/3578
dc.description Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 109 (2004): C08S18, doi:10.1029/2003JC001806. en_US
dc.description.abstract Rain has been shown to significantly enhance the rate of air-water gas exchange in fresh water environments, and the mechanism behind this enhancement has been studied in laboratory experiments. In the ocean, the effects of rain are complicated by the potential influence of density stratification at the water surface. Since it is difficult to perform controlled rain-induced gas exchange experiments in the open ocean, an SF6 evasion experiment was conducted in the artificial ocean at Biosphere 2. The measurements show a rapid depletion of SF6 in the surface layer due to rain enhancement of air-sea gas exchange, and the gas transfer velocity was similar to that predicted from the relationship established from freshwater laboratory experiments. However, because vertical mixing is reduced by stratification, the overall gas flux is lower than that found during freshwater experiments. Physical measurements of various properties of the ocean during the rain events further elucidate the mechanisms behind the observed response. The findings suggest that short, intense rain events accelerate gas exchange in oceanic environments. en_US
dc.description.sponsorship Funding was provided by a generous grant from the David and Lucile Packard Foundation. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2003JC001806
dc.subject Gas exchange en_US
dc.subject Rain en_US
dc.subject SF6 en_US
dc.subject Turbulence en_US
dc.subject Stratification en_US
dc.title Influence of rain on air-sea gas exchange : lessons from a model ocean en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2003JC001806


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