1961—2013年河南省极端降水事件时空变化特征  

Spatial-temporal Variation of Extreme Precipitation Events in Henan Province from 1961 to 2013

作　　者：赵国永 韩艳[1,2] 刘明华 侯俊丽[1] 时海萍 刘维真[1] 郭伊利 乔强 ZHAO Guoyong;HAN Yan;LIU Minghua;HOU Junli;SHI Haiping;LIU Weizhen;GUO Yili;QIAO Qiang(School of Geographic Sciences,Xinyang Normal University,Xinyang,Henan 464000,China;Key Laboratory of Climate Change and Environmental Evolution,Xinyang Normal University,Xinyang,Henan 464000,China;Research Center of North and South Transition Zone in China,Xinyang Normal University,Xinyang,Henan 464000,China)

机构地区：[1]信阳师范学院地理科学学院,河南信阳464000 [2]信阳师范学院气候与环境演变重点实验室,河南信阳464000 [3]信阳师范学院南北过渡带研究中心,河南信阳464000

出　　处：《水土保持研究》2018年第6期115-120,共6页Research of Soil and Water Conservation

基　　金：国家自然科学基金(41602187);河南省科技计划项目(162102310123);河南省高等学校重点项目(17A170011);信阳师范学院资助项目(0201306;2015GGJS-01)

摘　　要：以1961—2013年河南省17个站点逐日降水量数据为研究对象,运用Sen′s倾向估计、Mann-Kendall显著性检验和空间插值等方法,分析了河南省11个极端降水指数时间和空间变化特征及其影响因素。结果表明:(1)过去53年,河南省极端降水指数变化趋势不显著。(2)河南省区域内,东南部极端降水量、降水日数、降水强度大于西北部。过去53年,商丘和西华降水量、降水日数和降水强度显著增加,而安阳、新乡、孟津、三门峡等地显著减少。(3)将河南省极端降水指数与其他区域进行了比较表明,极端降水指数存在区域性差异。(4)极端降水指数与纬度因素之间相关性强于经度和海拔因素。(5)除CDD指数外,其余指数与年总降水量均具有较高相关性。其中,极端降水量(R95p)、年降水日数降水量(R10,R20和R25)对年总降水量贡献最大。Daily precipitation data of 17 meteorological stations in Henan Province during 1961-2013 were selected in this study.Some methods,including Sen′s tendency estimation,Mann-Kendall test and spatial analysis,were applied to detect spatial and temporal characteristics of eleven indices of extreme precipitation across Henan Province and their impact factors.The results showed that:(1)extremes precipitation indices across Henan Province presented an indistinctive variation trend during the last 53 years;(2)the extreme precipitation,rainfall days and intensities of precipitation in southeastern Henan Province were stronger than in northwest;the extreme precipitation,rainfall days and intensities of Shangqiu and Xihua exhibited significant increasing trend during the recent 53 years,and presented the decreasing trend in Anyang,Xinxiang,Mengjin and Sanmenxia areas;(3)compared with other regions,variation trend of extreme precipitation indices in Henan Province was different from the results found in the other regions of China,which exhibited regional difference;(4)the correlation between extreme precipitation indices and latitudes was much more significant than those between longitudes and altitude factors;(5)except for CDD,indices had close correlations with annual precipitation amounts.The precipitation of R95p,R10,R20 and R25 mostly contributed to annual total precipitation amount.

关 键 词：河南省 极端降水指数 时空变化 

分 类 号：P426[天文地球—大气科学及气象学]