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中文摘要：
降水量的时空分配不均匀是造成旱涝灾害的主要原因,深入分析降水量的时空分配均匀性,有助于防旱抗汛。研究了1960-2013年广东省的降水集中度和集中期,并探讨了在气候变化背景下广东省的降水量时空均匀性变化特征,从而揭示出降水量均匀性与气温突变的响应关系。研究结果表明：1近54 a广东省总体上呈暖湿化,气温突变后,逐渐转变为冷干化;2季节性降水量与PCD、PCP的变化趋势存在很好的响应关系。3广东省降水量相对较为均匀但变化幅度大,集中时期较早,气温突变后,降水量更集中和集中期推后,但其趋于分散和集中期趋于提前,且PCD和PCP波动性趋于减弱;4广东省气温、降水量、PCD和PCP存在一定的相关关系,且与北方地区有一定差异;5气温突变后,大部分地区降水量更集中和集中期推后,并保持一定的纬向变化。由此表明,广东省降水量时空均匀性与气候变化是存在一定响应关系的。
英文摘要：
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.
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