灾害学2017，Vol.32Issue(1)：72-79,8.DOI:10.3969/j.issn.1000-811X.2017.01.013
基于日值和小时降水数据诊断中国暴雨时空变化差异的研究（1991－2010）
The Difference of the Spatio-temporal Pattern Variation of Heavy Rainfall in China from 1991 to 2010 based on the Daily Precipitation Dataset and Hourly Precipitation Dataset
摘要
Abstract
Whether the daily precipitation dataset and hourly precipitation dataset from observation can reflect the spatiotemporal patterns of heavy rainfall in China with consistency or not,which need to deepen research heavy rainfall with different temporal resolution precipitation dataset.Therefore,the precipitation dataset with high tempo-ral resolution is desperately needed to advance the research in the field of the heavy rainfall in China.In this re-search,hourly heavy rainfall amounts and heavy rainfall hours as well as daily heavy rainfall amounts and daily heavy rainfall days are derived as a whole through China,based on the hourly precipitation dataset and daily pre-cipitation dataset during the period of 1991 through 2010.Results show that both heavy rainfall amounts and heavy rainfall days from the hourly precipitation dataset and daily precipitation dataset exhibit obviously consistent increase trends despite some fluctuation during the period investigated.However,heavy rainfall amounts and heavy rainfall days from daily precipitation dataset show higher fluctuation than hourly precipitation dataset.In the aspects of the spatial pattern of decadal heavy rainfall,hourly precipitation dataset and daily precipitation dataset have no signifi-cance difference.However,hourly precipitation dataset can reflect more details of the heavy rainfall.In the aspects of the spatial variation of decadal heavy rainfall,the daily precipitation dataset and the hourly precipitation dataset have great differences.Decadal heavy rainfall amounts and heavy rainfall days form the hourly precipitation dataset is lower than daily precipitation dataset in Yangtze River Basin,but higher in other regions with varying degrees. Decadal heavy rainfall amounts and heavy rainfall days change from daily precipitation dataset as well as hourly pre-cipitation dataset showed the same trend,but hourly precipitation data reflect spatial distribution characteristics more broken.Our results shown that hourly precipitation dataset and daily precipitation dataset consist reflect the spatial and temporal distribution of heavy rainfall in China,but there is a big difference in the order of magnitude. And there is a great difference in the aspects of China’s heavy rainfall changes.Appropriate dataset should be cho-sen according to research purpose.关键词
日值降水数据/小时降水数据/暴雨/年际/年代际/时空格局/中国Key words
daily precipitation dataset/hourly precipitation dataset/heavy rainfall/annual/decadal/spatio-temporal patterns/China分类
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孔锋,吕丽莉,方建,刘凡,应卓蓉,郭建平..基于日值和小时降水数据诊断中国暴雨时空变化差异的研究（1991－2010）[J].灾害学,2017,32(1):72-79,8.基金项目
中国博士后科学基金面上资助项目“基于时空变化分析的气候变化对洪水灾害影响研究”（2015M582263）；中央高校基本科研业务费专项资金课题“气候变化对长江流域洪水灾害影响研究”（2042016kf0067）；国家自然科学基金创新研究群体项目“地表过程模型与模拟” （）
