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JOURNAL OF DESERT RESEARCH ›› 2017, Vol. 37 ›› Issue (3): 536-545.DOI: 10.7522/j.issn.1000-694X.2015.00244

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Temporal and Spatial Variability of the Extreme Precipitation around the Kumtag Desert

Hu Yuling1, Ning Guicai1, Kang Caiyan1, Wang Shigong2,1, Shang Kezheng1, Yang Xu1   

  1. 1. College of Atmospheric Sciences/Key Laboratory of Arid Climate Change and Disaster Reduction in Gansu Province, Lanzhou University, Lanzhou 730000, China;
    2. College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610041, China
  • Received:2016-09-16 Revised:2016-10-29 Online:2017-05-20 Published:2017-05-20

Abstract: Daily precipitation data of 20 meteorological stations from 1960 to 2014 was used to analyze temporal and spatial variability of the extreme precipitation around the Kumtag Desert. The results show that: (1) The extreme precipitation events around the Kumtag Desert mainly were concentrated in summer. There are spatial differences for the extreme precipitation events. (2) The annual extreme precipitation events frequency, annual heavy rain frequency, annual heavy rain precipitation and annual precipitation increased significantly during nearly 55 years around the Kumtag Desert. (3) The extreme precipitation is mainly contributed by rainstorm in the west Kumtag Desert, and the extreme precipitation is contributed by rainstorm and heavy rain in the east Kumtag Desert. (4) The distribution of the trend coefficients of extreme precipitation indices at summer timescale is similar to that at year timescale. Moreover, they both act as a "saddle" shaped field.

Key words: Kumtag Desert, extreme precipitation index, extreme precipitation event, trend coefficient, temporal and spatial variability

CLC Number: