北印度洋和南海海温及500hPa高度场的相关分析

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THE CORRELATION ANALYSIS OF SST IN THE NORTHERN INDIAN OCEAN AND THE SOUTH CHINA SEA AND THE GEOPOTENTIAL HEIGHT PATTERN AT 500 HPA IN THE NORTHERN HEMISPHERE

摘要: 本文用北印度洋的索马里海区、阿拉伯海、孟加拉湾和南海海区月平均(1951—1972)海温和500hPa高度场(1951—1973)资料分析了各种海区海温的变化特征以及与500hPa高度场的相关。结果表明,在各个海区海温的季节变化、持续性、周期性都存在明显的差异,相互之间有明显的相关性,和500hPa高度场也有较明显的相关关系,尤其是西太平洋和北印度洋的中低纬地区。

Abstract: The monthly means of SST (1951-1972) in four ocean-current areas in the Northern Indian Ocean and the South China Sea, and the monthly means of geo-potential height of 500 hPa in the Northern Hemisphere (1951-1973) were analyzed in this paper. The spectrum analysis results show that the SST variation is characterized by the pronounced differences in seasonal dependency and permanence, and periodicity among these marine areas which are in close relationship. Furthermore, the correlativity between SST and the geopotential heights of 500hPa is very pronounced, not only simultaneously but also with some time lags, generally in lower and middle latitudes. The geopotential heights over the western Pacific Ocean and the Northern Indian Ocean are very sensitive to the variation of SST.