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ȯɽ�ԡ���߷ ˮ�� (ήɹ������� ������)
�ꡡ�ܡ�VARIABILITY IN LANDFAST SEA ICE IN THE OKHOTSK AND BALTIC SEAS
ȯɽ�ԡ����� ��Ϻ (�㲹�ʳظ���� COE �����)
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VARIABILITY IN LANDFAST SEA ICE IN THE OKHOTSK AND BALTIC SEAS (��߷ ˮ��) ȯɽ�� :
The thickness of coastal fast ice in the Okhotsk and Baltic Seas is examined by numerical modeling. The study sites are the Saroma-ko lagoon in Hokkaido and Kleye Strait on the coast of Sakhalin in the Sea of Okhotsk, and the Kemi fast ice station in the Baltic Sea. The evolution of the ice cover from freeze-up to breakup is examined by a one-dimensional thermodynamic model which is a fine resolution model including the snow layer, and its transformation into slush and snow-ice. Comparing with observed thicknesses in individual case years, the model showed reasonable agreement. The amount of snowfall and magnitude of oceanic heat flux seemed to play a major role on the relatively thin sea ice evolution. The resulting mean evolution of the ice thickness in Saroma-ko lagoon for the 10-year period shows that the site freezes in the beginning of January and the ice thickness is at its maximum at the end of March. The results in Kleye Strait show that the site freezes in the beginning of November, the ice thickness reaches 38 and 72 cm in January and March, respectively, and the ice has melted away by the end of May. The results at the Kemi station show that the site freezes at mid-November, the ice reaches at its maximum at 75 cm at mid-April and the snow cover reaches 20 cm at late March. The ice melts away by the end of May. Field data in both seas have been collected to understand physical processes in snow and ice structure in more detail in a model dealing with seasonal and climate variability.
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