Timing of El Niño–Related Warming and Indian Summer Monsoon Rainfall
Timing of El Niño–Related Warming and Indian Summer Monsoon Rainfall
复制标题
厄尔尼诺现象引起的变暖和印度夏季季风降雨的时间
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
A. Kaplan
中科院分区：
文献类型：
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作者：
C. Ihara;Y. Kushnir;M. Cane;A. Kaplan
摘要利用1881 ~ 1998年期间的观测资料，研究了全印度夏季风降水（ISMR）与厄尔尼诺-南方涛动（ENSO）相关的暖/冷时间的关系。对印度洋-太平洋海表温度（SST）异常演变的分析表明，当ISMR不低于正常值时，赤道东太平洋的暖化从冬季开始，并提前发展，从而使中西部太平洋和印度洋在夏季风季节偏暖。相比之下，当更常见的厄尔尼诺-干燥ISMR关系成立时，赤道东太平洋仅在参考夏季前一个季节左右开始迅速变暖，因此中西部太平洋和印度洋在季风季节保持寒冷。
Abstract The relationship between all-India summer monsoon rainfall (ISMR) and the timing of (El Nino–Southern Oscillation) ENSO-related warming/cooling is investigated, using observational data during the period from 1881 to 1998. The analysis of the evolutions of Indo-Pacific sea surface temperature (SST) anomalies suggests that when ISMR is not below normal despite the co-occurrence of an El Nino event, warming over the eastern equatorial Pacific starts from boreal winter and evolves early so that the western-central Pacific and Indian Ocean are warmer than normal during the summer monsoon season. In contrast, when the more usual El Nino–dry ISMR relationship holds, the eastern equatorial Pacific starts warming rapidly only about a season before the reference summer so that the western-central Pacific and Indian Oceans remain cold during the monsoon season.