干旱区研究2026，Vol.43Issue(1)：1-12,12.DOI:10.13866/j.azr.2026.01.01
1980-2024年西藏大气总水含量时空变化
Spatiotemporal changes in atmospheric total water content in Xizang from 1980 to 2024
摘要
Abstract
The Second Scientific Expedition on the Qinghai-Xizang Plateau revealed the imbalance between the Asian Water Tower and the warming-wetting tendency of the plateau.Xizang is a critical region sensitive to cli-mate and eco-environmental changes.Therefore,understanding spatiotemporal changes in atmospheric total wa-ter content is of great significance for the construction of ecological security barriers and the highland ecology of Xizang.Based on ERA5 reanalysis data from 1980 to 2024,this study investigates spatiotemporal changes in at-mospheric total water content in Xizang using methods including regional averaging,EOF decomposition,the Mann-Kendall test,and linear trend analysis.The results indicate the following:(1)The spatial variation of the an-nual-mean atmospheric total water content in Xizang is significant,decreasing sharply from the maximum in southeastern Xizang(38.3 mm)to the minimum(2.0 mm)in northwestern Xizang,with the spatial variation in southeastern Xizang being the most intense.(2)According to the results of the EOF decomposition analysis,only the first modes of summer,autumn,and winter atmospheric total water content regional consistent change across Xizang,while.In contrast,the other modes exhibit a spatial inconsistent change.(3)In most regions of Xizang,the atmospheric total water content increases significantly in spring,summer,and autumn.In summer,this in-crease generally exceeds 0.3 mm per 10 years.(4)The spring-,summer-,autumn-,and annual-mean atmospheric total water contents significantly increase in years 2003,2006,2016,and 2006,respectively.These can be inter-preted as abrupt climate changes.关键词
大气总水含量/时空分布/变化特征/ERA5/西藏Key words
atmospheric total water content/spatiotemporal distribution/variation characteristics/ERA5/Xi-zang引用本文复制引用
余忠水,王美蓉,刘明竑,高佳佳,德庆卓嘎,格央,扎西..1980-2024年西藏大气总水含量时空变化[J].干旱区研究,2026,43(1):1-12,12.基金项目
西藏自治区科技创新基地建设项目(XZ202401YD0008) （XZ202401YD0008）
