ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
General Circulation over the Northern Hemisphere in 2001 and Its Impact on the Climate in China
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Abstract:
General circulation features over the Northern Hemisphere in 2001 are analyzed. It's shown that the subtropical high at 500hPa over the western Pacific in the winter of 2000/2001 and the spring of 2001 was stronger than normal, and was weaker in the summer and the autumn. In the summer of 2001, the 500hPa geopotential height anomaly was positive in the Eurasia, and the positive center was over Lake Baikal. Both in the winter and the summer, the East Asian monsoon was weaker than normal. In the July of 2001, the equatorial convergence zone was more active than normal, and its position was more north than normal. The SSTa in the eastern tropical Pacific was negative in 2001. The results show that the anomalies of both the sea temperature the tropical Pacific and atmosphere circulation would exert a significant impact on the weather and climate in China.
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