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dc.contributor.authorEsters, L.
dc.contributor.authorLandwehr, S.
dc.contributor.authorSutherland, G.
dc.contributor.authorBell, T. G.
dc.contributor.authorChristensen, K. H.
dc.contributor.authorSaltzman, E. S.
dc.contributor.authorMiller, S. D.
dc.contributor.authorWard, B.
dc.date.accessioned2018-09-20T16:07:24Z
dc.date.available2018-09-20T16:07:24Z
dc.date.issued2017-04-01
dc.identifier.citationEsters, L. Landwehr, S.; Sutherland, G.; Bell, T. G.; Christensen, K. H.; Saltzman, E. S.; Miller, S. D.; Ward, B. (2017). Parameterizing air-sea gas transfer velocity with dissipation. Journal of Geophysical Research: Oceans 122 (4), 3041-3056
dc.identifier.issn2169-9275
dc.identifier.urihttp://hdl.handle.net/10379/11377
dc.description.abstractThe air-sea gas transfer velocity k is frequently estimated as an empirical function of wind speed. However, it is widely recognized that k depends on processes other than wind speed alone. The small-eddy model, which describes periodic events of small eddies disturbing the sea surface with water from below, suggests a direct relation between k and the dissipation rate of turbulent kinetic energy E at the air-sea interface. This relation has been proven both in laboratories and in the field in various freshwater and coastal environments, but to date has not been verified in open ocean conditions. Here, concurrent North Atlantic field observations of E and eddy covariance measurements of DMS and CO2 air-sea gas flux are presented. Using E measurements, we compare the small-eddy model at various depths to previously published observations. Extrapolating the measured E profiles to the thickness of the viscous sublayer allows us to formulate a function of k that depends solely on the water side friction velocity uw, which can be inferred from direct eddy covariance measurements of the air-side friction velocity ua. These field observations are generally consistent with the theoretical small-eddy model. Utilizing a variable Schmidt number exponent in the model, rather than a constant value of 1/2 yields improved agreement between model and observations.
dc.publisherWiley-Blackwell
dc.relation.ispartofJournal of Geophysical Research: Oceans
dc.subjectair-sea gas transfer
dc.subjecttransfer velocity
dc.subjectdissipation
dc.subjectturbulence
dc.subjectsurface boundary-layer
dc.subjectwater-interface
dc.subjectwind-speed
dc.subjectupper ocean
dc.subjectexchange
dc.subjectturbulence
dc.subjectwave
dc.subjectco2
dc.subjectdimethylsulfide
dc.subjectfluxes
dc.titleParameterizing air-sea gas transfer velocity with dissipation
dc.typeArticle
dc.identifier.doi10.1002/2016jc012088
dc.local.publishedsourcehttp://plymsea.ac.uk/7553/1/Esters%20et%20al%202017.pdf
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