Numerical experiments of air鈥搃ce drag coefficient and its impact on ice鈥搊cean coupled system in the Sea of Okhotsk
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- 作者：Ayumi Fujisaki ; Hajime Yamaguchi and Humio Mitsudera
- 关键词：Sea ice ; Sea of Okhotsk ; Sensitivity study of the air– ; ice drag coefficient ; Ice– ; ocean interaction
- 刊名：Ocean Dynamics
- 出版时间：April, 2010
- 出版年：2010
- 期刊代码：112_1616-7341
- 类别：ear
- 卷：60
- 期：2
- 页码：377-394
- 数据来源：sp
摘要
Sensitivity study of the air–ice drag coefficient C Dai is presented with an ice–ocean coupled model for the Sea of Okhotsk. The C Dai 脳 103 value is varied from 2 to 5 based on the direct measurements in the region. The maximum volume transport of the East Sakhalin Current and the mean sea ice velocity were intensified as C Dai increased. The sensitivity experiment with the ice–water drag coefficient C Diw showed that the East Sakhalin Current volume transport is hardly affected by C Diw but significantly intensified by C Dai. While the ice drift in the off-ice-edge direction was intensified by the increase in C Dai and the decrease in C Diw, the ice edge location was nearly unchanged. This was due to melting caused by the relatively warm water inflow from the North Pacific. That is, sea ice extent in the region is strongly influenced by melting caused by a large ice–ocean heat transfer. In the active melting regions, the ice–ocean heat transfer of more than 100 W/m2 occurred even in mid-winter. This is the same order as the cooling by air in winter, and a heat insulation capacity of sea ice is weakened in such regions.