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On the weakening relationship between the indian monsoon and ENSO

Kumar, KK and Rajagopalan, B and Cane, MA (1999) On the weakening relationship between the indian monsoon and ENSO. Science, 284 (5423). pp. 2156-2159.

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Analysis of the 140-year historical record suggests that the inverse relationship between the El Nino-Southern Oscillation (ENSO) and the Indian summer monsoon (weak monsoon arising from warm ENSO event) has broken down in recent decades, Two possible reasons emerge from the analyses. A southeastward shift in the Walker circulation anomalies associated with ENSO events may lead to a reduced subsidence over the Indian region, thus favoring norma monsoon conditions. Additionally, increased surface temperatures over Eurasia in winter and spring, which are a part of the midlatitude continental warming trend, may favor the enhanced land-ocean thermal gradient conducive to a strong monsoon. These observations raise the possibility that the Eurasian warming in recent decades helps to sustain the monsoon rainfall at a normal level despite strong ENSO events.

Item Type: Article
Additional Information: Copyright of this article belongs to AAAS.
Uncontrolled Keywords: rain, air-sea interaction; El Nino-Southern Oscillation; monsoon; surface temperature; Walker circulation, article; Asia; environmental temperature; Europe; global climate; Indian Ocean; priority journal; sea; season; winter, Asia; India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 06 Mar 2015 05:22
Last Modified: 06 Mar 2015 05:22

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