RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2012, Vol. 21 >> Issue (Z2): 90-.

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CLIMATE CHARACTERS OF TYPICAL DROUGHTSFLOODS ABRUPT ALTERNATION EVENTS IN THE MIDDLELOWER REACHES OF THE YANGTZE RIVER

CHENG Zhi, DING Xiaojun, XU Min, LUO Liansheng   

  1. (Anhui Climate Center,Hefei 230031|China)
  • Online:2012-12-19

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Abstract:

Using standardized precipitation index and historical disaster data,droughtsfloods abrupt alternation events in secondlevel hydrology partition of middlelower reaches of the Yangtze River were selected,their spatiotemporal distribution characters and the differences in frequency and intensity of partitions were also analyzed.The results showed that from 1960 to 2011 typical droughtsfloods abrupt alternation events happened,the frequency was about 10 years,in which the intensity index and rainfall intensity in lower main reaches were stronger.There were obvious adjustments when droughtsfloods abrupt alternation events happened.There are notable differences in south and east Asian high latitude areas of 200 hPa height field and subtropical east Asian areas in 850 hPa wind field.〖

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