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JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (4): 770-774.DOI: 10.7522/j.issn.1000-694X.2016.00012

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Change Trend of Precipitation during 1961-2014 in Zhangye,Gansu,China

Du Jun1,2, Gao Junkai3   

  1. 1. Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. School of Resources and Environmental Engineering, Ludong University, Yantai 264000, Shandong, China
  • Received:2015-12-10 Revised:2016-01-18 Online:2017-07-20 Published:2017-07-20

Abstract: Based on the daily precipitation data of Zhangye meteorological station from 1961 to 2014,the change trend and mutation characteristics of annual precipitation,maximum precipitation,winter precipitation,and the precipitation in spring-autumn in Zhangye were analyzed through linear trend analysis and Mann-kendall test.The results showed that annual precipitation increased from 1961 to 2014,and it significantly increased in 1982-1984,1995-1996,2007-2013.Significant increases were found in maximum precipitation and winter precipitation,and there were six and one abrupt changes in the past 54 years,respectively.Abrupt changes of the maximum rainfall occurred in 1963,1980,1982,1984,1987 and 1991.Winter precipitation showed a significant increase trend from 1964,and an abrupt increase was found in 1969.The precipitation in spring-autumn showed a fluctuated increase trend,and five abrupt increases were observed in 1963,1967 and 1969,respectively.

Key words: precipitation trend, abrupt change analysis, Mann-Kendall test, Zhangye, arid zone

CLC Number: