【摘 要】
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It is indicated in this paper that there were substantial differences of interannual variability (ⅡⅤ) in summer rainfall over South China (RSC) among 1960
【机 构】
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InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing,100029;KeyLaboratoryofRegionalClimate
【出 处】
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The 13th CAS-TWAS-WMO Forum International Symposium on Extre
论文部分内容阅读
It is indicated in this paper that there were substantial differences of interannual variability (ⅡⅤ) in summer rainfall over South China (RSC) among 1960-1977,1978-1988, and 1989-2010.Notably, both ⅡⅤ and mean RSC have significant increased after 1992/1993.Relative to 1978-1988, the percentage increase of standard deviation (SD) of RSC is 230.32% for 1993-2010.It indicates remarkable increase in ⅡⅤ of RSC occurred 1993-2010, concurrent with rainfall increase.The results show that the mid-tropospheric meridional gradient of temperature over East Asia weakened in the later period, resulting in an anomalous cyclonic circulation, transporting more tropospheric moisture to South China and an upward motion at the middle and low levels of the troposphere.Meanwhile, ⅡⅤ in the mid-tropospheric meridional gradient of temperature over East Asia resulted in ⅡⅤs both in the anomalous cyclonic circulation and in vertically integrated moisture content over South China.
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