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[1]ZHANG Handan,WEI Wei,XUE Sha.Analysis on the Variation of Temperature and Precipitation in Dingxi Based on R/S and Mann-Kendall Test[J].Research of Soil and Water Conservation,2015,22(06):183-189.

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Analysis on the Variation of Temperature and Precipitation in Dingxi Based on R/S and Mann-Kendall Test

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 06 Page number: 183-189 Column: Public date: 2015-12-28

Title:: Analysis on the Variation of Temperature and Precipitation in Dingxi Based on R/S and Mann-Kendall Test

Author(s):: ZHANG Handan^1,2, WEI Wei¹, XUE Sha³; 1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
2. School of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: climate change; trend; abrupt change detection; characteristics

CLC:: P467

DOI:: -

Abstract:: The loess hilly region has long been characterized by its fragile ecosystem and deteriorated environment. The local natural conditions are very sensitive to climate change. Dingxi, located in the southwest of the Loess Plateau, was selected as a typical example to detect the basic features of local climate variation. Linear equation, 5-year moving-average, climatic tendency, Mann-Kendall test and R/S analysis methods were used to analyze the meteorological data. Results showed that: (1) the temperature gradually increased during the past 45 years and would continue to increase with the Hurst index greater than 0.5; the temperature was testified to rise by a clear abrupt in 1994; meanwhile, the increase rate of temperature differed in different seasons, extreme climate events were confirmed in Dingxi during the monitored years; it increased sharply in winter, showing an obvious warm-winter phenomenon; (2) the precipitation had decreased gradually since 1960s, particularly during the summer and autumn periods, no abrupt changes were detected, and the Hurst index was less than 0.5, indicating that the precipitation will tend to increase in the forthcoming years. Generally, the climate in Dingxi region possibly will transfer from warm-dry to warm-wet conditions.

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