Impact of the Indian Ocean Dipole on the relationship between the Indian monsoon rainfall and ENSO
Impact of the Indian Ocean Dipole on the relationship between the Indian monsoon rainfall and ENSO
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DOI：
10.1029/2001gl013294
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发表时间：
2001-12-01
影响因子：
5.2
通讯作者：
Yamagata, T
中科院分区：
文献类型：
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作者：
Ashok, K;Guan, ZY;Yamagata, T
研究了1958-1997年印度洋偶极子（IOD）对印度夏季风降水（ISMR）年际变化的影响。IOD和厄尔尼诺/南方涛动（ENSO）在过去四十年中对ISMR产生了互补性影响。当ENSO-ISMR相关性低（高）时，IOD-ISMR相关性高（低）。IOD作为印度季风降水的调制器，对ISMR和ENSO的相关性有重要影响。我们发现，ENSO引起的印度地区异常环流要么被IOD引起的异常纬向环流圈抵消，要么被IOD引起的异常纬向环流圈支持，这取决于印度洋-太平洋地区两个主要热带现象的相位和振幅。
The influence of the recently discovered Indian Ocean Dipole (IOD) on the interannual variability of the Indian summer monsoon rainfall (ISMR) has been investigated for the period 1958-1997. The IOD and the El Nino/Southern Oscillation (ENSO) have complementarily affected the ISMR during the last four decades. Whenever the ENSO-ISMR correlation is low (high), the IOD-ISMR correlation is high (low). The IOD plays an important role as a modulator of the Indian monsoon rainfall, and influences the correlation between the ISMR and ENSO. We have discovered that the ENSO-induced anomalous circulation over the Indian region is either countered or supported by the IOD-induced anomalous meridional circulation cell, depending upon the phase and amplitude of the two major tropical phenomena in the Indo-Pacific sector.