Parameterization of atmosphere–surface exchange of CO2 over sea ice.

Sorensen, L. L., Jensen, B., Glud, R. N., McGinnis, Daniel, Sejr, M. K., Sievers, J., Sogaard, D. H., Tison, J.-L. and Rysgaard, S. (2014) Parameterization of atmosphere–surface exchange of CO2 over sea ice. Open Access The Cryosphere, 8 (3). pp. 853-866. DOI 10.5194/tc-8-853-2014.

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We suggest the application of a flux parameterization commonly used over terrestrial areas for calculation of CO2 fluxes over sea ice surfaces. The parameterization is based on resistance analogy. We present a concept for parameterization of the CO2 fluxes over sea ice suggesting to use properties of the atmosphere and sea ice surface that can be measured or calculated on a routine basis. Parameters, which can be used in the conceptual model, are analysed based on data sampled from a seasonal fast-ice area, and the different variables influencing the exchange of CO2 between the atmosphere and ice are discussed. We found the flux to be small during the late winter with fluxes in both directions. Not surprisingly we find that the resistance across the surface controls the fluxes and detailed knowledge of the brine volume and carbon chemistry within the brines as well as knowledge of snow cover and carbon chemistry in the ice are essential to estimate the partial pressure of pCO(2) and CO2 flux. Further investigations of surface structure and snow cover and driving parameters such as heat flux, radiation, ice temperature and brine processes are required to adequately parameterize the surface resistance.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.5194/tc-8-853-2014
ISSN: 1994-0416
Date Deposited: 09 Jan 2015 08:56
Last Modified: 25 May 2016 12:37

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