Abstract: Changes in extreme precipitation events exert a huge impact on human beings, and it is of vital importance to study the regular patterns of meteorological and hydrological factors under climate change. Based on the monthly 0.5°×0.5° gridded evapotranspiration and precipitation data during the period of 1901-2013 from Climate Research Unite (CRU), the spatiotemporal variation of extreme precipitation events in Tajikistan was analyzed by the methods of trend analysis, Mann-Kendall and wavelet analysis. The results are as follows:① The frequencies of annual, spring, autumn and winter extreme precipitation events were all in an increase trend with increase rates of 0.33 times·(10a)^-1, 0.15 times·(10a)^-1, 0.07 times·(10a)^-1 and 0.20 times·(10a)^-1respectively. The frequency of extreme precipitation events in summer was in a slight decrease trend. There were the obvious abrupt changes in frequencies of annual and seasonal extreme precipitation events; ② The frequencies of annual, spring, autumn and winter precipitation extreme events were high in Gorno-Badakhshan but low in the northwestern region of Khatlon and the northern region of Leninabad. However, they were high in the western region of Gorno-Badakhshan, northern region of Leninabad and eastern region of Khatlon but low in the westernmost and eastern parts of Tajikistan. The extreme precipitation events were in a significant increase trend in the eastern region of Khatlon and Tadzhikista Territories. The significant increase of frequency of extreme precipitation events indicated that there was a significant humidification in Tajikistan under climate change. This paper can provide a reference for the research on the spatial and temporal variation of water resources and the management and planning of water resources in Tajikistan under global warming.

Key words: precipitation extreme event, spatiotemporal variation, Tajikistan