Interaction between anomalous winter monsoon in East Asia and El Nino events
- Li Chongyin
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Based on a series of data analyses, the intimate relations between anomalous winter monsoon in East Asia and El Nino are studied in this paper.
Anomalistic circulation in the Northern Hemisphere caused by El Nino event can lead to enhancing the Ferrel cell and the westerlies in the mid—latitudes as the Hadley cell and result in the location of the front zone in East Asia to the north. These are unfavourable for the cold wave breaking out southward in East Asia. Therefore, there are warmer weather and weaker winter monsoon in East Asia in El Nino winter.
There are stronger and frequent cold waves in East Asia during the wintertime prior to the occurrence of El Nino event. They will induce stronger winter monsoon in East Asia. Thus, the weakened trade wind and enhanced cumulus convection in the equatorial middle—western Pacific area caused by the stronger winter monsoon will play an important role in the occurrence of El Nino event. Therefore, the anomalously strong winter monsoon in East Asia during wintertime might be an important mechanism to cause El Nino event.
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- Interaction between anomalous winter monsoon in East Asia and El Nino events
Advances in Atmospheric Sciences
Volume 7, Issue 1 , pp 36-46
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- Science Press
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- Li Chongyin (1)
- Author Affiliations
- 1. LASG, Institute of Atmospheric Physics, Academia Sinica, 100080, Beijing