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根据黄、渤海夏季由台风引起的异常海温的主要特点 ,构造一个简单而典型的台风过程模型 ,利用“近海异常海温数值预报模式”对海表层温度进行了数值试验 ,对台风过程中引起异常海温的各因子进行了定量分析 ,给出台风中心及其附近各点由各因子引起的变温率变化。试验表明 ,在台风作用下 ,冷水抽吸是引起异常低温的主要原因 ,大风夹卷的贡献占第二位 ,蒸发潜热的作用也不容忽视。数值模拟还清晰地显示出台风所引起的左弱右强的不对称降温效应以及表层暖水向外输运并在台风边缘下沉的现象。另外 ,还对近海异常海温预报模式的几个关键性问题及模式需改进之处进行了讨论。
According to the main features of abnormal SST caused by typhoon in the Yellow Sea and the Bohai Sea in summer, a simple but typical typhoon process model is constructed. The numerical simulation of the sea surface temperature is carried out by using the numerical model of offshore SST anomaly, Abnormal sea temperature of the various factors were quantitative analysis of the typhoon center and the vicinity of each factor caused by temperature change rate. Experiments show that under the action of typhoon, cold water suction is the main cause of abnormal low temperature, and the contribution of gale clip occupies the second place. The role of latent heat of evaporation can not be neglected. Numerical simulations also clearly show the asymmetric cooling effect caused by the typhoon, weakness of the left and right, as well as the outward transport of surface warm water and sinking at the edge of the typhoon. In addition, several key problems of offshore anomalous sea temperature prediction mode and their modalities for improvement are also discussed.