副高对黄渤海夏季异常海温影响的数值试验

副热带高压是黄、渤海夏季异常海温的重要成因之一。根据该海区夏季的气候特点 ,构造了一个典型的副高天气过程 ,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。对该形势下引起黄、渤海夏季异常高温的各因子进行了定量分析 ,给出了副高中心及其附近两点由各因子引起的增温率变化。试验表明 ,副热带高压控制的天气情况下 ,短波辐射对该海区夏季异常高温的形成起主要作用 ,暖水辐聚的贡献占第二位。

Numerical Experiment of the Summer SSTA Affected by Sub-tropical High in the Yellow Sea and Bohai Sea

Sub tropical high is one of the main causes of summer SSTA in the Yellow Sea and the Bohai Sea. In this paper, an off shore SSTA numerical forecasting model was employed to simulate the SST in this area. According to the summer climate features of this area, a typical sub tropical high process was constructed to further quantitatively analyze the cause of SSTA in summer. The SST variation caused by different factors in the position of sub tropical high centre and the positions near it was given as well. The test showed that in the region dominated by sub tropical high, short wave radiation was the main cause of the SST increase, surface warm water convergence played a secondary role.