沙漠与绿洲气象2024，Vol.18Issue(1)：74-80,7.DOI:10.12057/j.issn.1002-0799.2024.01.009
1961-2020年西北地区夏季降水趋势变化特征
Variation Characteristics of Summer Precipitation in Northwest China from 1961 to 2020
摘要
Abstract
Based on the daily precipitation observation data of 364 stations in northwest China in recent 60 years,the spatial and temporal variation characteristics of summer precipitation trend in northwest China were compared and studied from the perspective of precipitation and precipitation days.The results show that,on average,the summer precipitation in northwest China accounts for more than 50%of the total annual precipitation in the region.On the whole,the precipitation in northwest China shows a linear trend of significant increase,but it is not consistent with the increase in the whole region.The number of stations with increased(decreased)precipitation accounts for about 57%(43%)of the total stations in the region,and the number of stations with increased(decreased)precipitation days accounts for about 43%(57%)of the total stations.The stations increased at the same time are mainly located in southern Xinjiang basin,the western northern Xinjiang,central and northern Qinghai,while the stations decreased at the same time are mainly located in southeast Gansu,Ningxia,eastern central Shaanxi and other places,while the stations with reversed changes are mainly located in northern Xinjiang,the southwestern edge of Qinghai province,and southern Shaanxi.In the past 60 years,the extreme precipitation and precipitation days in northwest China also show a linear increase trend.In addition to the interannual variation,there are also interdecadal variation characteristics of precipitation and precipitation days in various regions of northwest China,but there are certain differences in the change phases of different regions.关键词
西北地区/夏季/降水/趋势Key words
northwest region/summer/precipitation/trend分类
天文与地球科学引用本文复制引用
李勇,梅双丽,周宁芳..1961-2020年西北地区夏季降水趋势变化特征[J].沙漠与绿洲气象,2024,18(1):74-80,7.基金项目
国家自然科学基金项目(U2142207) （U2142207）
国家科技支撑计划课题(2015BAC03B07) （2015BAC03B07）
