Abstract: Using the daily precipitation data of 25 meteorological stations from 1951 to 2006 in Guangxi, the temporal and spatial distribution characteristics and variation tendency of extreme continuous precipitation (ECP) were analyzed by linear regression and Mann-Kendall test analysis method. The Results show that: (1) The ECP in the middle or near seaside of Guangxi is more than that in two wings or the place far from the sea. There are two high value areas and two low value areas with ECP in Guangxi. The high and low value center are more and more obvious and more concentrated with the increasing of extreme precipitation duration. (2) The rising trend of ECP can be found in most parts of Guangxi, but spatial distribution characteristics of it is very different. The rising trend of high value areas with ECP is more prominent than that in high value areas and the rise of ECP around the mountain area is obviously higher than the middle basin area. The increase of extreme continuous rainfall intensity means the likelihood and severity of derivative disasters increase. (3) The rising trend of ECP can be found in recent 50 years in Guangxi and the rate of it is between 2.75 and 3.85mm/10a. There are three extreme continuous precipitation of high strength and the two extreme continuous precipitation low intensity period. (4) Spatial distribution of ECP coincides with the geographic and geomorphic conditions of Guangxi, which indicates that important factors influencing the ECP of Guangxi are the geographic and geomorphic conditions and general atmospheric circulation.

Key words: climate change, extreme continuous precipitation, temporal and spatial distribution characteristics, M-K test analysis, Guangxi, China