冬季南海SST月异常时500hPa气温响应场的传播路径

THE TRANSMISSION PATH OF THE 500 hPa TEMPERATURE RESPONSE ON THE SOUTH CHINA SEA SST MONTHLY ABNORMALITY IN WINTER

利用中科院大气物理研究所的两层大气环流模式（ＩＡＰ—ＧＣＭⅡ）作了南海海表水温月异常时５００ｈＰａ气温响应场传播路径的数值试验。结果表明：当南海表面水温出现正异常时该气温响应场分为南北两支传播；北支沿逆时针路径向北传播，由南海经我国东南部到达青藏高原，南支则向南传播；而当负异常时，则该响应场有顺时针的传播路径，由南海经泰国湾最后也到达青藏高原。

By using the two level atmospheric general circulation model (IAP GCM II), some numerical experiments are made to study the path of the 500 hPa temperature response in association with the South China Sea SST abnormally in winter. When the South China Sea SST is abnormal warm, the transmission path of the response can be divided into two directions. The northward one is in an anti clockwise route from the South China Sea through the southeast China to the Qinghai Xizang Plateau. The southward one is over the Equator to the Southern Hemisphere. When the South China Sea SST is abnormally cold, the transmission path of the response is in a clockwise route from the South China Sea through the Thailand Gulf to the Qinghai Xizang Plateau.