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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Discussion papers | Copyright
https://doi.org/10.5194/acp-2018-32
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 12 Feb 2018

Research article | 12 Feb 2018

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Chemistry and Physics (ACP).

The influence of transformed Reynolds number limitation on gas transfer parameterizations and global DMS and CO2 fluxes

Alexander Zavarsky1 and Christa A. Marandino2 Alexander Zavarsky and Christa A. Marandino
  • 1researcher: Kiel, Germany
  • 2GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany

Abstract. Eddy covariance measurements show gas transfer velocity limitation at medium to high wind speed. A wind-wave interaction described by the transformed Reynolds number is used to characterize environmental conditions favoring this limitation. We take the transformed Reynolds number parameterization to review the two most cited wind speed gas transfer velocity parameterizations, Nightingale 2000 and Wanninkhof 1992/2014. We propose an algorithm to correct for the effect of gas transfer limitation and validate it with two gas transfer limited directly measured DMS gas transfer velocity data sets. A correction of the Nightingale 2000 parameterization leads to an average increase of 22% of its predicted gas transfer velocity. The increase for Wanninkhof 2014 is 9.85%. Additionally, the correction is applied to global air-sea flux climatologies of CO2 and DMS. The global application of gas transfer limitation leads to a decrease of 6–7% for the uptake CO2 by the oceans and to decrease of 11% of oceanic outgassing of DMS. We expect the magnitude of Reynolds limitation on any global air-sea gas exchange to be 10%.

Alexander Zavarsky and Christa A. Marandino
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Status: final response (author comments only)
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Alexander Zavarsky and Christa A. Marandino
Alexander Zavarsky and Christa A. Marandino
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Latest update: 18 Oct 2018
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Short summary
Wind-wave interaction can suppress gas transfer between the atmosphere and the ocean. Using a global wave model we investigate the impact of this interaction on the global gas transfer of CO2 and DMS. We also investigate the impact on of gas transfer limitation on two commonly used gas transfer velocity parameterizations.
Wind-wave interaction can suppress gas transfer between the atmosphere and the ocean. Using a...
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