中文摘要：

用从全球降水气候学工程(GPCP ) 的降雨数据， NOAA 延长了重建海表面温度(ERSST ) ，和 NCEP/NCAR 分析，这研究调查印度半岛和与 ENSO 联系的孟加拉的东北海湾的夏天降雨西南的 interannual 变化。合成学习在发展期间显示在孟加拉的东北海湾的印度半岛和增加的减少的夏天降雨西南分阶段执行，但是反过来也如此 El 在腐烂期间分阶段执行 Ni ? o。进一步的回归分析证明在上述二个区域的反常降雨被不同机制控制。印度半岛的西南，降水异例在 El Ni 的腐烂阶段与本地传送对流和水蒸汽流动有关 ? o。在更低的对流层的异常气旋发行量帮助加强降雨。在孟加拉的东北海湾，异常降雨取决于印度西南夏天季风(ISSM ) 的力量。在 El Ni 的发展中的阶段的强壮 / 弱的 ISSM ? o 能带更 / 少些水蒸汽加强 / 削弱本地夏天降水。

英文摘要：

Using rainfall data from the Global Precipita- tion Climatology Project （GPCP）, NOAA extended reconstruction sea surface temperature （ERSST）, and NCEP/NCAR reanalysis, this study investigates the interannual variation of summer rainfall southwest of the Indian Peninsula and the northeastern Bay of Bengal associated with ENSO. The composite study indicates a decreased summer rainfall southwest of the Indian Penin- sula and an increase in the northeastern Bay of Bengal during the developing phase, but vice versa during the decay phase of E1 Nifio. Further regression analysis dem- onstrates that abnormal rainfall in the above two regions is controlled by different mechanisms. Southwest of the Indian Peninsula, the precipitation anomaly is related to local convection and water vapor flux in the decay phase of E1 Nifio. The anomalous cyclone circulation at the lower troposphere helps strengthen rainfall. In the northeastern Bay of Bengal, the anomalous rainfall depends on the strength of the Indian southwest summer monsoon （ISSM）. A strong/weak ISSM in the developing/decay phase of E1 Nifio can bring more/less water vapor to strengthen/weaken the local summer precipitation.