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Enhancement of CO2 transfer velocity due to water-side convection
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (meterologi, awep)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (meteorologi, awep)
2010 (English)In: Journal of Marine Systems, ISSN 0924-7963, E-ISSN 1879-1573, Vol. 80, no 1-2, 125-134 p.Article in journal (Refereed) Published
Abstract [en]

The exchange of CO2 between ocean and atmosphere is controlled by the air-sea difference in partial pressure of CO2 and by the efficiency of the transfer processes, the efficiency can be represented by a resistance of the surface and expressed by transfer velocity, k.

Measurements made at the Östergarnsholm field station in the Baltic Sea indicate that the CO2 transfer velocity is also a function not only of wind speed, but also of the mixed-layer depth of the water and, to a lesser degree, of the stratification of the atmosphere. The transfer velocity is significantly enhanced by a large mixed-layer depth, the enhancement increasing as the surface cooling increases. The impact of mixed layer depth is expressed by the convective velocity scale of the water (analogous to atmospheric convective scaling).Enhancement due to convection is an important factor affecting the diurnal cycle of air-sea fluxes. Large air-sea temperature differences also occur due to air mass advection. Here water-side convection at wind speeds between 2.5 and 6.5 m s-1 is investigated.The enhancement due to convection can be added to the traditional transfer velocity.

Place, publisher, year, edition, pages
2010. Vol. 80, no 1-2, 125-134 p.
Keyword [en]
Air-sea exchange, Transfer velocity parameterization, CO2 exchange, Eddy-correlation measurements, water-side convection
National Category
Natural Sciences
Research subject
Meteorology
Identifiers
URN: urn:nbn:se:uu:diva-115282DOI: 10.1016/j.jmarsys.2009.11.004ISI: 000274985800011OAI: oai:DiVA.org:uu-115282DiVA: diva2:295215
Available from: 2010-02-17 Created: 2010-02-17 Last updated: 2017-12-12Bibliographically approved

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Rutgersson, AnnaSmedman, Ann-Sofi

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