Chinese Science Bulletin

, Volume 57, Issue 27, pp 3535–3540 | Cite as

Weakening relationship between East Asian winter monsoon and ENSO after mid-1970s

  • HuiJun WangEmail author
  • ShengPing He
Open Access
Article Progress of Projects Supported by NSFC Atmospheric Science


The East Asian winter monsoon (EAWM) is characterized by the frequent cold surges and associated closely with the Siberia High, East Asian Trough, and high-level westerly jet stream. The ENSO cycle can modulate the EAWM since it has co-variability with the sea surface temperature over the Indo-Western-Pacific which can tune the land-sea thermal contrast for the EAWM. This paper, by analyzing the EAWM, ENSO, and associated atmosphere-ocean variability, documents the weakening of the EAWM-ENSO relationship after the 1970s. The significant out-of-phase inter-relationship is found to be diminished after the 1970s. Further study in this work suggests that the weakened co-variability of the tropical Indo-Western-Pacific climate associated with ENSO after the 1970s is partly responsible for the weakened inter-relationship. Meanwhile, the reduced EAWM interannual variability and northward retreat of the EAWM-associated climate variability are favorable to the weakened ENSO-EAWM connection.


East Asian winter monsoon ENSO interdecadal variability interannual variability 


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Copyright information

© The Author(s) 2012

Authors and Affiliations

  1. 1.Nansen-Zhu International Research Center, Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina
  2. 2.Climate Change Research CenterChinese Academy of SciencesBeijingChina
  3. 3.Graduate University of Chinese Academy of SciencesBeijingChina

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