中国汛期降水的印度洋SSTA信号特征分析

基金项目: 《国家重点基础研究发展规划》首批启动的"我国重大气候灾害的机理和预测理论研究"项目;云南省科委应用基金97D033Q课题;云南省气象局青年研究基金YQ9904课题

THE SSTA SIGNAL CHARACTERISTIC ANALYSIS OVER INDIA OCEAN DURING FLOOD SEASON IN CHINA

摘要: 用EOF和CCA方法研究了印度洋海表温度距平场与中国汛期降水场的遥相关分布特征,结果表明:印度洋SSTA场与中国汛期降水场相关明显,海温场异常分布对中国汛期南北经向雨带的变化及中国西北、西南和长江黄河下游地区汛期旱涝的影响明显,揭示了中国汛期旱涝异常分布的印度洋海温变化的强信号现象,说明特定的印度洋海温分布可以作为中国汛期旱涝预报的强信号因子。
- 中国汛期降水 /
- 海表温度距平 /
- 典型相关分析 /
- 信号特征
Abstract: The teleconnection distribution characteristics between sea surface temperature (SST) over India Ocean and the precipitation during rainy season in China were studied by using the method of EOF and CCA. The results indicated that the change of SST field will affect the change of rain belt during rainy seasons in China,and heavily affect the precipitation in north-west,south-west,the Yangzi and Yellow River downstream in China. The strong signal phenomena of SSTA over India Ocean were revealed and it showed that the precipitation during rainy season in China may be forecasted by analyzing SST distribution characteristics over India Ocean.
- precipitation during rainy season in China /
- sea surface temperature (SST) /
- canonical correlation analysis /
- signal characteristic

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