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本文利用TOPEX/POSEIDON高度计资料,计算了中国近海渤海、两巴海峡①、黄海、东海中部和南海北部等五个典型区域海平面高度异常特征指数,分析了各海区特征指数的振幅变化规律及周期,并用这些指数与海平面风场及温度场分别进行了相关分析。结果表明:我国近海海平面高度异常除黄海外各海区都具有显著周期变化。异常指数与风速正相关主要分布在西太平洋中低纬海域,负相关区域主要位于中亚至我国大陆西部和中太平洋近赤道海域,与温度场正相关区分别位于非洲大陆南部、澳洲大陆南部和南美大陆中南部,负值相关区主要位于北印度洋和东太平洋海域。与温度相关场分布表明中国近海海平面高度异常与ENSO现象有关。
In this paper, the TOPEX / POSEIDON altimetry data were used to calculate the anomaly characteristics of sea level anomalies in five typical areas of the Bohai Sea, the Bapa Channel ①, the Yellow Sea, the central East China Sea and the northern South China Sea. The variation regularity and period of the characteristic index in each sea area , And analyzed the correlation between these indexes and sea level wind field and temperature field respectively. The results show that the sea level anomalies in offshore China have significant periodic variations except for the sea areas outside the Yellow Sea. The positive correlations between anomalous indices and wind speed are mainly in the middle and low latitudes of the western Pacific Ocean. The negative correlations are mainly located in the region from Central Asia to western China and the mid-equatorial Pacific. The positive correlations with the temperature field are located in southern Africa, southern Australia and South Central South America, the negative correlation zone is mainly located in the North Indian Ocean and the Eastern Pacific Ocean. The field-related temperature distribution shows that the sea level anomalies in China’s offshore are related to the ENSO phenomenon.