基于标准降水指数的河南省干旱时空演变规律分析  

Space-time Evolution Rule Analysis of Drought in Henan Province Based on Standardized Precipitation Index

作　　者：郝秀平[1] 张振伟[1] 马建琴[1] 刘晓洁[2] 彭高辉[1] 

机构地区：[1]华北水利水电大学水利学院,河南郑州450011 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《水电能源科学》2013年第9期4-7,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(41071025);水利部"948"基金资助项目(201047)

摘　　要：基于河南省17个气象站1960~2010年的月降水资料,采用标准降水指数（SPI）统计分析了年尺度和季尺度的SPI干旱指数,探讨了不同时间尺度下不同干旱等级的时间演变趋势及空间分布特征。结果表明,河南省年尺度干旱总体上呈增加趋势,不同年代呈现不同的变化趋势;季尺度干旱表现为春旱和秋旱的干旱强度和干旱站次比均呈增加趋势,而夏旱和冬旱有所减缓,在当前气候变化背景下,河南省干旱整体上呈现对农业生产不利影响加重的趋势。在区域上,河南省北部易发生干旱,但干旱程度较低,而南部和西南部相对易发生严重干旱和极端干旱。With precipitation data from 17 weather stations in H enan Province, standardized precipitation index （SPI） was used to describe drought condition during the recent 51a （from 1960 to 2010）. Annual and seasonal drought indices were calculated, and drought frequency and intensity were analyzed for each station. The results show that annual drought occurrence in Henan Province was increasing during 1960-2010, different magnitudes in different ages; for sea- sonal drought, the drought occurrence was getting more serious in spring and autumn while the opposite trend occurred in summer and winter; this change was unfavorable for agricultural productian spatial differences comparison of drought occurrence demonstrate that the north of Henan Province was prone to encounter the droughts, hut more slight ones while the severe and extreme droughts were more tend to attack the south of the region.

关 键 词：标准降水指数 干旱 时空演变规律 河南省 

分 类 号：P468[天文地球—大气科学及气象学]