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《Meteorology Journal of Inner Mongolia》 2018-03
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Analysis of Precipitation variation Characteristics and drought disasters in recent 50 years in Xilinhot

Zhang Liwei;Xilinhot National Climate Observing Station;  
Drought is one of the most important natural disasters which impact animal husbandry development in Xilingol. Based on the precipitation data since 1961 and the division of precipitation anomaly percentage of Drought standard in northern Steppe, we did a detailed analysis of the characteristics of the seasonal and annual drought in Xilinhot, the results showed that:(1) The change of precipitation showed obvious age regularity: the average annual precipitation of 1960's, 1980's, and 2000's is less than the average of many years, the average annual precipitation of 1970's, 1990's, and 2010-2014 ismore than the average of many years;(2) The variation of spring precipitation is the same of annual precipitation, and the change of precipitation in winter is more special, after 2000, it shows change trend that is significantly higher than the average of many years;(3) The occurrence probability of extremely severe drought in Xilinhot is 9.26%, which is about 1/10; the occurrence probability of severe drought in Xilinhot is 20.99%, which is about 1/5; the occurrence probability of medium drought in Xilinhot is 24.69%, which is about 1/4; the occurrence probability of light drought in Xilinhotis14.81%, which is about 1/7; the occurrence probability of Non drought in Xilinhot is 30.25%, which is about 1/3.
【Fund】: 内蒙古气象局“内蒙古农牧业精细化区划”项目子专题“内蒙古牧区灾害风险区划”资助
【CateGory Index】: P468.0
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