Cryosphere geophysics examines snow and ice on earth: atmospheric ice, seasonal snow cover, glaciers, lake and river ice, sea ice, and frozen ground. The cryosphere is an integral part of the global climate system with important linkages and feedbacks generated through its influence on surface energy, clouds, precipitation, hydrology, and atmospheric and oceanic circulation.

The main research topics in the cryology research group are sea and lake ice and seasonal snow cover. Sea ice research covers the whole ice-covered ocean, with the main study region having been the Baltic Sea. The dynamics of sea ice has been examined by theoretical research and mathematical modelling, and detail structural and thermodynamic research has been based on field investigations in the Baltic and Okhotsk Seas. Seasonal snow cover work has been made in Finland and Antarctica.

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