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Publication . Conference object . 2004

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

Nicolaus, Marcel; Haas, Christian;
Open Access
Published: 01 Jan 2004
Country: Germany
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).
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