Numerical experiments of air-ice drag coefficient and its impact on ice-ocean coupled system in the Sea of Okhotsk
Numerical experiments of air-ice drag coefficient and its impact on ice-ocean coupled system in the Sea of Okhotsk
复制标题
鄂霍次克海气冰阻力系数数值试验及其对冰海耦合系统的影响
DOI：
10.1007/s10236-010-0265-7
复制
发表时间：
2010
期刊：
影响因子：
2.3
通讯作者：
H. Yamaguchi and H. Mitsudera
中科院分区：
文献类型：
--
作者：
Fujisaki;A.;H. Yamaguchi and H. Mitsudera
利用鄂霍次克海的冰-海耦合模型提出了空气-冰阻力系数CDai的敏感性研究。根据该区域的直接测量，CDai× 103值在2到5之间变化。随着CDai的增加，东萨哈林海流的最大输送量和平均海冰速度增强。冰水阻力系数CDiw的敏感性实验表明，东萨哈林海流的体积输运几乎不受CDiw的影响，但受CDai的影响显着增强。尽管CDai的增加和CDiw的减少加剧了离冰边缘方向的冰漂移，但冰边缘位置几乎没有变化。这是由于北太平洋相对温暖的海水流入造成的融化。也就是说，该地区的海冰范围受到大量冰-海洋热传递引起的融化的强烈影响。在融化活跃的地区，即使在隆冬，冰海传热也超过100W/m2。这与冬季空气冷却的顺序相同，在该地区海冰的隔热能力减弱。
Sensitivity study of the air–ice drag coefficientCDaiis presented with an ice–ocean coupled model for the Sea of Okhotsk. TheCDai× 103value 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 asCDaiincreased. The sensitivity experiment with the ice–water drag coefficientCDiwshowed that the East Sakhalin Current volume transport is hardly affected byCDiwbut significantly intensified byCDai. While the ice drift in the off-ice-edge direction was intensified by the increase inCDaiand the decrease inCDiw, 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/m2occurred 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.