基于均一化降水资料的中国极端降水特征分析

论文利用中国1961—2012年602个测站均一化的日降水资料,基于世界气象组织定义的11个极端降水指数,分析了近52 a中国极端降水事件的时空分布特征。结果表明：年极端降水指数长期变化趋势表明,大部分极端降水指数在我国西北和长江中下游地区（除CDD）以及东南沿海和华南大部分地区均呈现增加趋势,而在华北地区为减少趋势。极端降水指数随时间的变化表明,各指数具有明显的年际和年代际变化,从2000年开始大部分指数表现为不同程度的增加趋势,即极端降水事件从2000年开始偏多。

Characteristics of Extreme Precipitation in China Based on Homogenized Precipitation Data

By using the homogenized daily precipitation data of the 602 stations from 1961 to 2012 in China, the basic temporal and spatial characteristics of extreme precipitation events in China during the last 52 years are discussed based on 11 extreme precipitation indices published by World Meteorological Organization (WMO). The results are as follows. The linear trends of the indices of precipitation extremes suggest that all indices of extreme precipitation are increasing in Northwest China and mid-lower reaches of the Yangtze River except CDD. The linear trends of the indices of precipitation extremes are all decreasing in North China, but are ascending in southeastern coast and South China. The indices exhibit significant interannual and interdecadal variability, and the increasing trends are found in almost all 11 indices since 2000, suggesting that there are more extreme precipitation events in China since then.