Spatial and Temporal Characteristics of Precipitation in Yungui Plateau during 1961-2015

¹ School of Geography and Tourism, Guizhou Education University, Guiyang 550018, China ;
² Guizhou Provincial Key Laboratory of Geographic State Monitoring, Guiyang 550018, China ;
³ Institute of Mountain Resource, Guizhou Academy of Sciences, Guiyang 550001, China ;

^* Corresponding author: awujianfeng74623@sina.com; b110695145@qq.com; ccaoguangjie@gznc.edu.cn; d624360114@163.com;

Abstract

In this paper, the daily precipitation data of 19 meteorological stations in Guizhou Province from 1961 to 2015 are used. Using GIS spatial analysis method and linear trend analysis method, the distribution characteristics of annual and seasonal precipitation in Guizhou province were analyzed from space and time. The results show that: (1) From the perspective of spatial distribution, annual precipitation is generally less in the south and north and less in the east and west. The precipitation in winter and spring is east-west distribution and decreases from east to west in the four seasons. The precipitation in summer is roughly north-south and south-north less. The precipitation in autumn is mainly concentrated in southwest Guizhou and Chishui valley. (2) From the time distribution point of view, the precipitation in Guizhou Province showed a general downward trend, of which the precipitation in spring, autumn and winter showed a decreasing trend, the downward trend in autumn was more obvious, and the precipitation in summer increased but not obviously.