干旱区地理2025，Vol.48Issue(3)：367-379,13.DOI:10.12118/j.issn.1000-6060.2024.207
1961-2022年中国西北干旱区夏季降水变化特征
Variation characteristics of summer precipitation in the arid region of northwest China from 1961 to 2022
摘要
Abstract
Using summer daily precipitation data from 102 meteorological stations from June to August during 1961-2022,the spatial and temporal characteristics of extreme and non-extreme precipitation were analyzed,and variations in these two precipitation types across different areas of the arid region of northwest China were compared.The results reveal the following:(1)Summer precipitation in the arid region of northwest China exhib-ited an increasing trend,particularly in the Ili River Valley and the western Tarim Basin,contributing an average of more than 40%to total annual precipitation.(2)Extreme precipitation in summer accounted for approximately 45%of total precipitation in the arid region,with an overall increasing trend,notably in the western Tarim Basin,Hexi-Alagxa,and northern Xinjiang.(3)Most meteorological stations in the region recorded increasing trends in extreme precipitation,extreme precipitation days,and extreme precipitation intensity.However,the number of non-extreme precipitation days showed significant decreases at most stations,while non-extreme precipitation in-tensity increased significantly.In the western Tarim Basin,the increase in summer precipitation was driven by both extreme and non-extreme precipitation,contributing 61%and 39%of the total increase,respectively.In oth-er regions,the rise in summer precipitation was predominantly due to the increase in extreme precipitation.These findings enhance understanding of summer precipitation climate change in the arid region of northwest China.关键词
极端降水/非极端降水/时空特征/区域差异/中国西北干旱区Key words
extreme precipitation/non-extreme precipitation/spatial and temporal characteristics/regional dif-ference/arid region of northwest China引用本文复制引用
郑孟林,赵勇,杨霞..1961-2022年中国西北干旱区夏季降水变化特征[J].干旱区地理,2025,48(3):367-379,13.基金项目
"天山英才"培养计划(2023TSYCCX0077) （2023TSYCCX0077）
成都信息工程大学科技项目(KYTD202333)资助 （KYTD202333）
