Sea-to-air fluxes from measurements of the atmospheric gradient of dimethylsulfide and comparison with simultaneous relaxed eddy accumulation measurements

We measured vertical profiles of dimethylsulfide (DMS) in the atmospheric marine boundary layer from R/P FLIP during the 2000 FAIRS cruise. Applying Monin‐Obukhov similarity theory to the DMS gradients and simultaneous micrometeorological data, we calculated sea‐to‐air DMS fluxes for 34 profiles. Fr...

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Bibliographic Details
Published in:Journal of Geophysical Research. C. Oceans 2004-01, Vol.109 (C1), p.n/a
Main Authors: Hintsa, Eric J., Dacey, John W. H., McGillis, Wade R., Edson, James B., Zappa, Christopher J., Zemmelink, Hendrik J.
Format: Article
Language:English
Subjects:
air-sea exchange
Earth, ocean, space
Exact sciences and technology
gas transfer
Marine
sulfur emissions
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Summary:We measured vertical profiles of dimethylsulfide (DMS) in the atmospheric marine boundary layer from R/P FLIP during the 2000 FAIRS cruise. Applying Monin‐Obukhov similarity theory to the DMS gradients and simultaneous micrometeorological data, we calculated sea‐to‐air DMS fluxes for 34 profiles. From the fluxes and measured seawater DMS concentrations, we calculated the waterside gas transfer velocity, kw. Gas transfer velocities from the gradient flux approach are within the range of previous commonly used parameterizations of kw as a function of wind speed but are a factor of 2 smaller than simultaneous determinations of transfer velocity using the relaxed eddy accumulation technique. This is the first field comparison of these different techniques for measuring DMS flux from the ocean; the accuracy of the techniques and possible reasons for the discrepancy are discussed.
ISSN:0148-0227
2169-9275
2156-2202
2169-9291
DOI:10.1029/2002JC001617