辽东湾海冰漂移的动力要素分析

Dynamic analysis of drifting ice in the Liaodong Bay

利用辽东湾JZ2 0 2海域冰期气象、水文和海冰的实测资料和海冰数值模拟结果 ,对海冰漂移过程中风和流的拖曳力、海冰内力、科氏力和海面倾斜力要素的基本特征进行了分析 ;采用海冰热力—动力模式对 1999年 2月 3日 6 :5 0至 2月 5日 6 :5 0间辽东湾海冰进行了 48h数值模拟 ,对并JZ2 0 2海域的海冰动力要素进行了对比分析。发现海冰内力、风和流的拖曳力为同一量级 ,海面倾斜力和科氏力明显较小 ,其均值的比例关系依次为 14.7∶18.8∶32 .6∶1.5∶1.0 ;海冰各动力要素相互影响 。

The meteorological, oceanographic and sea ice conditions of the JZ20 2 area in the Liaodong Bay were measured, and the sea ice was simulated with thermodynamics dynamics model. Based on the results above, the basic characteristics of drifting ice dynamic factors, which include wind and current drag, ice internal force, Coriolis' force and ocean tile effect, were analyzed in details. With the simulated results of Liaodong Bay in 48 hours, from 6:50 February 3 to 6:50 February 5, 1999, the dynamic factors of JZ20 2 area were contrasted. It was found that ice internal force, wind and current drag have same order of magnitude, the ocean tile effect and the Coriolis' force both have little effect on ice drifting obviously. The proportion of their mean value is as follows: 14.7∶18.8∶32.6∶1.5∶1.0. All of the dynamic factors in ice drifting affects each other, and controls the ice velocity and drifting route together.