Interdecadal Change in Extreme Precipitation
over South China and Its Mechanism |
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Authors: | NING Liang and QIAN Yongfu |
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Affiliation: | Department of Atmospheric Sciences, Nanjing University, Nanjing 210093;Department of Atmospheric Sciences, Nanjing University, Nanjing 210093 |
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Abstract: | Based on the daily precipitation data taken from 17 stations over South China during the
period of 1961--2003, a sudden change in summer extreme precipitation events over South China in the
early 1990s along with the possible mechanism connected with the anomalies of the latent heat flux
over the South China Sea and the sensible heat flux over the Indochina peninsula are examined. The
results show that both the annual and summer extreme precipitation events have obvious interdecadal
variations and have increased significantly since the early 1990s. Moreover, the latent heat flux
over the South China Sea and the sensible heat flux over the Indochina peninsula also have obvious
interdecadal variations consistent with that of the extreme precipitation, and influence different
months' extreme precipitation, respectively. Their effects are achieved by the interdecadal increases
of the strengthening convection over South China through the South China Sea Summer Monsoon. |
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Keywords: | extreme precipitation interdecadal change South China sensible heat flux latent heat flux |
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