Contribution of south China Sea tropical cyclones to an increase in southern China summer rainfall around 1993 |
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Authors: | Jiepeng Chen Renguang Wu Zhiping Wen |
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Institution: | Center for Monsoon and Environment Research/Department of Atmospheric Sciences,
Sun Yat-Sen University, Guangzhou 510275;Institute of Space and Earth Information Science and Department of Physics,
Chinese University of Hong Kong, Shatin, Hong Kong;Center for Monsoon and Environment Research/Department of Atmospheric Sciences,
Sun Yat-Sen University, Guangzhou 510275 |
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Abstract: | The increase in southern China summer rainfall around 1993 was accompanied by an increase in tropical cyclones that formed
in the South China Sea. This study documents the connection of these two features. Our analysis shows that the contribution
of tropical cyclones that formed in the South China Sea to southern China summer rainfall experienced a significant increase
around 1993, in particular, along the coast and in the heavy rain category. The number of tropical cyclones that formed in
the western North Pacific and entered the South China Sea decreased, and their contribution to summer rainfall was reduced
in eastern part of southern China (but statistically insignificant). The increase in tropical cyclone-induced rainfall contributed
up to ~30% of the total rainfall increase along the coastal regions. The increase of tropical cyclones in the South China
Sea appears to be related to an increase in local sea surface temperature. |
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Keywords: | South China Sea tropical cyclones decadal change around 1993 |
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