Response Relation between Precipitation Heterogeneity and Climate Change in Guangdong

The spatial and temporal inhomogeneity of precipitation is the main cause of drought and flood disasters. Analyzing the spatial and temporal homogeneity of precipitation can provide scientific basis for the flood control and drought relief work. Based on observed precipitation data during 1960- 2013 in Guangdong Province,the precipitation concentration degree( PCD) and precipitation concentration period( PCP) were computed and the temporal and spatial variations of precipitation in Guangdong in response to climate change were analyzed for exploring the response relation between the homogeneity of precipitation and abrupt change of temperature. Results showed that: 1 The climate in Guangdong was warm and wet during 1960- 2013,but became cold and dry gradually after the temperature abrupt change. 2 The seasonal precipitation had a good response relationship with the PCD and the PCP. 3The precipitation was relatively homogeneous but with large varied amplitude,and the PCP arrived earlier. After the abrupt change of temperature,precipitation became more concentrated and concentration period delayed but precipitation tended to be decentralized and concentration period was ahead of time,and the volatility of the PCD and PCP tended to weaken. 4 There were some correlations among air temperature,precipitation,the PCD and the PCP in Guangdong,which was different with northern China. 5After the abrupt change of temperature,precipitation of most areas became more concentrated and concentration period arrived earlier,and all maintained a certain latitudinal variation. This indicated that precipitation uniformity of space- time in Guangdong has a certain response relationship with climate change.