1960-2016年冀西北地区降水时空变化特征研究  

The spatial and temporal variation characteristics of precipitation in Northwest Hebei Province during 1960-2016

作　　者：杨佳 郝桂珍[1] 张婧 王利民[1] 裴宏伟[1] 贾慧慧[1] YANG Jia;HAO Guizhen;ZHANG Jing;WANG Limin;PEI Hongwei;JIA Huihui(Hebei University of Architecture,Zhangjiakou 075000,China;Hebei Meteorological Bureau,Shijidzhuang 050021,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省气象局,河北石家庄.050021 [3]中国科学皖大学,北京100049

出　　处：《水资源与水工程学报》2019年第5期117-123,133,共8页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(41701017);河北省科技厅重点研发计划项目(18397002D);张家口市科技计划项目(1711027C、1711052J);科技部国家重点研发计划课题(2016YFC0401403)

摘　　要：区域尺度的降水量时空特征研究对干旱半干旱地区的生态保育工作具有重大的现实意义。根据冀西北地区14个气象站点1960-2016年逐日降水资料,运用Mann-Kendall非参数检验法和反距离权重插值法,分析了该地区降水量时空变化规律。研究表明:1960-2016年研究区气候的季风性减弱,年内降水呈现秋、冬、春季增加,而夏季减少的趋势;平均年降水量呈增加趋势(Z=0.13,β=0.08 mm/a);区域内部干湿趋势空间差异较大,地处半干旱区的北部坝上地区4个站点皆呈减少趋势,地处半湿润区的南部坝下地区则各有5个站点分别呈增加和减少趋势;降水空间分布上呈东多西少、南多北少、自东南向西北递减趋势,并在中东部及西北部分别出现降水高值和低值中心。The temporal and spatial characteristics of precipitation at the regional scale has great practical values for the ecological conservation in arid and semi-arid areas.The daily precipitation dataset including 14 meteorological observation stations in Northwest Hebei Province during 1960-2016 was used,and the Mann-Kendall non-parametric testing method and and the inverse distance weight(IDW)interpolation method were employed to analyze the spatial distribution of precipitation.The results showed that:During 1960-2016,monsoon was weakened,the precipitation in autumn,winter and spring showed increasing trend,while the precipitation in summer reduced.The mean annual precipitation of each site increased in the Northwest Hebei Province(NHP)(Z=0.13,β=0.08 mm/a).The dry or wet trend also varied spatially,and the four sites in the arid northern area of Bashang Region showed no significantly decrease in precipitation.But in the relatively wetter southern area of Baxia Region,five sites became wetter or became drier respectively.The spatial distribution of precipitation varied:wetter in the south-eastern and drier in the north-western region,while the wettest value and the driest value were in the eastern NHP and northwestern NHP,respectively.

关 键 词：降水时空变化特征 MANN-KENDALL法 变化趋势 空间分布 冀西北 

分 类 号：P468.O+24[天文地球—大气科学及气象学]