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0引言东亚地区冬季的冷空气活动频繁,一次冷空气过程通常以冷高压单体减弱东移入海结束。冷空气衰亡阶段强度较弱,但要准确预报海面的风、浪仍有一定难度。我国近海温带气旋的活动非常活跃,东部和沿海地区每年约有60个温带扰动产生~([1-2]),给船舶航行安全带来极大威胁。国内对我国近海温带
0 Introduction In winter, cold air in East Asia is frequent. A cold air process usually ends with the eastward shift of cold and high pressure cells to the sea. The strength of the cold air at the decay stage is weaker, but it is still difficult to accurately predict the wind and waves on the sea surface. The activities of the typhoon in offshore China are very active. There are about 60 perturbations of the temperate zone in the eastern and coastal areas every year [1-2], posing a great threat to the navigation safety of ships. Domestic temperate to offshore China