Observation and modeling of snow melt and superimposed ice formation on sea ice


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mnicolaus [ at ] awi-bremerhaven.de

Abstract

Sea ice plays a key role within the global climate system. It covers some 7% of earths surface and processes a strong seasonal cycle. Snow on sea ice even amplifies the importance of sea ice in the coupled atmosphere-ice-ocean system, because it dominates surface properties and energy balance (incl. albedo).Several quantitative observations of summer sea ice and its snow cover show the formation of superimposed ice and a gap layer underneath, which was found to be associated to high standing stocks of algae. Superimposed ice forms from the refreezing of snow melt / fresh water (Fig. 1+2).Here we present properties of melting snow (Fig. 4-6), processes of superimposed ice formation based on field measurements and ice-laboratory analysis (Fig. 7-10), as well as first results from a numerical model (Fig. 11+12).



Item Type
Conference (Poster)
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Not peer-reviewed
Publication Status
Published
Event Details
Doktorandentag 2004..
Eprint ID
11093
Cite as
Nicolaus, M. and Haas, C. (2004): Observation and modeling of snow melt and superimposed ice formation on sea ice , Doktorandentag 2004. .


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