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Inter-annual variation of the earth rotation and El Ni o

DOI: 10.1360/02tb9023

Keywords: El Ni o,inter-annual variation of earth rotation,atmospheric angular moment,solar activity

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The relationship between the inter-annual variations of the earth rotation, atmospheric angular momentum (AAM), sunspot number and El Ni o is analyzed. The result shows that the inter-annual variation of the earth rotation responds to the variation of AAM and the pregnancy of El Ni o timely. Generally, the inter-annual component of the earth rotation will reach zero in a changing process that increases from the negative to the positive extreme before El Ni o occurs about half year or more. And the solar activity may have certain influence on the appearance of El Ni o. We consider that El Ni o will possibly appear around the end of 2001.


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