El Nino 位相期间印度洋海温异常对中国南部初夏降水及初夏亚洲季风影响的数值模拟研究

基于中国科学院大气物理研究所的IAP 9L大气环流模式，设计并完成了赤道太平洋暖异常海温和印度洋地区的不同结构异常海温的强迫试验，以研究在El Ni o位相期间印度洋不同海温异常分布对初夏亚洲季风及我国南部地区初夏降水的影响。结果表明：El Ni o位相期间印度洋异常海温的作用是不可忽视的。在El Ni o位相期间，印度洋不同的海温结构对越赤道气流异常，对印度、中南半岛及中国南方的降水分布有重要的影响。利用NCEP的资料进行合成分析，进一步证实了数值模拟结果的可靠性。

A Numerical Simulation of the Indian Ocean SSTA Influence on the Early Summer Precipitation of the Southern China during an El Nio Year

Based on the IAP 9L, experiments are designed to study the influence of the different SSTA structure over the India Ocean during El Ni o on the early summer Asian monsoon and the early summer precipitation over the southern China. The results show that the affection of the SSTA over the Indian Ocean is significant. The different SSTA structures over the Indian Ocean have important impact on the cross-equatorial flow and the precipitation over India, the China-Indian Peninsula in the early summer during El Ni o, which is basically in agreement with observations.