青藏高原东侧降水与印度洋海温的遥相关特征

The Teleconnection Characteristics between the Precipitation on the East Side of Tibetan Plateau and Indian Ocean SST

选取高原东侧近50年（1951-2000年）35个气象观测站降水和同期印度洋海温资料,运用SVD分析方法讨论了其同期与印度洋海温的遥相关关系。结果表明：高原东侧降水与同期印度洋海温有三种基本的遥相关模态。合成分析表明,高原东侧降水异常与大气环流异常有密切的关系,海温偏高年,高度场偏高,西风偏弱,北风偏强,不利于降水的形成;海温偏低年,高度场偏低,西风偏强,南风偏强,有利于降水形成。

Datasets including precipitation of 35 observational stations of the east side of Tibetan Plateau and the Indian Ocean SST during 50 years（ 1951 - 2000） have been used to analysis their teleconnection characteristics by using SVD method. The results show as follow： There are three pairs of teleconnection models between them. Composite analysis shows the higher Indian Ocean SSTA, eastward and stron- ger East Asian trough, weaker westerly and northerly wind go against the precipitation of the east side of Tibetan Plateau. Otherwise, the lower Indian Ocean SSTA, weaker East Asian trough, stronger westerly and southerly wind is beneficial to it .