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《Acta Agriculturae Jiangxi》 2015-11
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Occurrence Trend of Meteorological Disasters in Gansu under Background of Climate Warming

YANG Rong-rong;DONG Jie;College of Tourism and Environment,Shaanxi Normal University;  
On the basis of the data of daily mean temperature,maximum temperature,minimum temperature and precipitation in Gansu province from 1960 to 2013,through using the methods of linear trend,five-year moving average,Mann-Kendall test and spatial interpolation method,the author comparatively analyzed the change characteristics of occurrence frequency and intensity of high temperature,low temperature,rainstorm,drought and flood in this province before climate warming( 1960 ~ 1994) and after climate warming( 1995 ~ 2013). The results showed that: the daily mean temperature in Gansu appeared a mutation in 1995,and it rose constantly after the mutation; around the mutation,the intensity and frequency of high temperature increased in most regions of Gansu,the intensity of high temperature presented obviously different changes between the north and the south,and it was the greatest in the south-central; both the intensity and the frequency of low temperature decreased in the whole Gansu( except for MazongMountain),the decreasing amplitudein the central was higher than that in the south,and the decreasing amplitude in the north was the smallest; the rainstorm frequency increased to some extent in eastern and western Gansu,while it decreased somewhat in southern Gansu; the occurrence of drought and flood in Gansu province revealed a certain periodicity,the period was about 6 ~ 7 years,and the increasing or decreasing amplitudeof different grades of drought and flood disasters was different.
【CateGory Index】: P429
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