Seasonal cycle of the zonal land-sea thermal contrast and East Asian subtropical monsoon circulation |
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Authors: | Qi Li He JinHai Zhang ZuQiang Song JinNuan |
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Institution: | [1]Key Laboratory of Meteorological Disaster of Jiangsu Province, Nanjing University of Information Science and Technology, Nanjing 210044, China [2]Nationai Climaie Center, Beijing 100081, China [3]College of Remote Sensing,-Nanjing University of Information Science and Technology, Nanjing 210044, China |
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Abstract: | Based on analysis of the climatic temperature latitudinal deviation on middle troposphere, its seasonal cycle suggests that due to the rapid warming from eastern China continent to the east of Tibetan Pla-teau and the heating of Tibetan Plateau in spring, seasonal transition of the thermal difference between East Asia continent and West Pacific first takes place in the subtropical region with greatest intensity. On the accompanying low troposphere, the prevailing wind turns from northerly in winter to southerly in summer with the convection precipitation occurring at the same time. This maybe indicates the onset of the East Asian subtropical summer monsoon. Consequently, we advice that the seasonal cycle formed by the zonal thermal contrast between Asian continent and West Pacific may be an independent driving force of East Asian subtropical monsoon. |
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Keywords: | zonal land-sea thermal contrast East Asian subtropical monsoon tropical monsoon Tibetan Plateau |
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