Acta Geographica Sinica ›› 2016, Vol. 71 ›› Issue (5): 718-730.doi: 10.11821/dlxb201605002

• Climate Change • Previous Articles     Next Articles

Spatiotemporal patterns of extreme precipitation with their responses to summer temperature

Xihui GU1,2(), Qiang ZHANG1,2(), Dongdong KONG1,2   

  1. 1. Department of Water Resources and Environment, Sun Yat-sen University, Guangzhou 510275, China
    2. Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2015-12-17 Revised:2016-03-02 Online:2016-05-25 Published:2016-05-25
  • Supported by:
    Key Project of National Natural Science Foundation of China, No.51425903;Research Grants Council of the Hong Kong Special Administrative Region, China, No.CUHK441313

Abstract:

Daily precipitation and temperature data at 728 stations covering a period of 1951 to 2014 across China were analyzed to investigate extreme precipitation regimes in terms of spatiotemporal patterns, precipitation magnitude, precipitation frequency, occurrence timing, non-stationarity of extreme precipitation regimes and also their responses to summer temperature changes. The methods adopted in this study are Peak over Threshold (POT) sampling technique, change point analysis, trend analysis and piecewise regression method. Results of this study indicated that magnitude of extreme precipitation events was subject to evident alterations but free of significant trends. However, occurrence rates of extreme precipitation were subject to adverse changing properties when compared to changes in magnitude of extreme precipitation. The entire China was dominated by apparent increase of occurrence rates of extreme precipitation. Besides, change points within magnitude and occurrence rates of extreme precipitation tended to modify the changing tendency therein. However, occurrence timing of extreme precipitation events seemed to be free of impacts from change points. In most regions of China, occurrence time of extreme precipitation events was delayed and no changes in occurrence time of extreme precipitation could be observed in other regions of China.

Key words: extreme precipitation, POT resampling, piecewise regression, non-stationarity, summer temperature, China