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《Research of Agricultural Modernization》 2012-01
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A Judgment of Warming-drying Climate Changes and Drought Disaster Trend of Weibei Dryland of Shaanxi

PENG Wei-ying,YIN Shu-yan,BAO Xiao-juan(College of Tourism and Environmental Science,Shaanxi Normal University,Xi'an,Shaanxi 710062,China)  
Based on 1961-2009 meteorological data,we analyzed the climate change characteristics of Weibei dryland with methods of area drought-flood Xi index and Mann-Kendall test.The results indicated that the temperature increased by the rate of 0.246℃/10a,climate has a trend of warming and drying which has a remarkable change in the year of 1991 and 1994.In the recent 49 years,there are five years of slight drought,three years of heavy drought and two years severe drought.Seasonal differences of drought exist,damping in winter and summer but drying in spring and autumn.Seasonal continuous drought occurs frequently,especially winter-spring continuous drought.Severe drought in summer and four seasons continuous drought are the main reasons of year severe drought in Weibei dryland.
【Fund】: 2011年度国家社科基金重点项目“历史时期汉江上游极端性气候水文事件及其社会影响研究”(编号:11AZS009);; 国家自然科学基金重点项目“汉江上游(南水北调水源区)万年尺度古洪水水文学研究”(编号:41030637);; 中央高校基本科研业务费专项基金项目“气候变化对陕西省经济作物物候影响研究”(编号:GK201002015)
【CateGory Index】: S423
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