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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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