干旱区研究2024，Vol.41Issue(3)：399-410,12.DOI:10.13866/j.azr.2024.03.05
塔什库尔干河流域河谷大气降水同位素特征与水汽输送路径
Characteristics of atmospheric precipitation isotope and path analysis of water vapor transport in the Taxkorgan River Basin Valley
摘要
Abstract
By using stable isotope data of atmospheric precipitation from September 2018 to May 2020 in the Taxkorgan River Basin Valley and meteorological data such as temperature,precipitation,and relative humidity from representative weather stations within the valley,this study analyzed the variation in δ18O,δ2H,and deuteri-um excess(d-excess)of precipitation.The influencing factors were explored,and the water vapor transport path-ways of atmospheric precipitation in the valley were traced and analyzed using the hybrid single-particle La-grangian integrated trajectory model(HYSPLIT).Results show that the δ2H and δ18O values of precipitation gen-erally present a seasonal pattern of enrichment in summer and depletion in winter,showing a significant tempera-ture effect(1.33‰·℃-1),but no significant precipitation effect was observed.The local meteoric water line is δ2H= 7.63δ18O-3.55,which shows distinct arid climate characteristics.The HYSPLIT simulation results indicate that the water vapor of precipitation in the study basin is mainly influenced by the westerly circulation and local water vapor recycling,with local water vapor evaporation accounting for 54.09%in the summer half-year and the long-distance transport of the western route accounting for 45.53%in the winter half-year.Water vapor from the Indian Ocean in August can bypass the Tibetan Plateau and reach the study area.These findings can provide a reference basis for water resource management and climate response in the Taxkorgan River Basin Valley.关键词
氢氧稳定同位素/大气降水/水汽来源/塔什库尔干河谷Key words
hydrogen and oxygen stable isotopes/atmospheric precipitation/water vapor sources/Taxkorgan River Basin Valley引用本文复制引用
李晗薇,姚俊强,容韬,张天洋,高雅洁..塔什库尔干河流域河谷大气降水同位素特征与水汽输送路径[J].干旱区研究,2024,41(3):399-410,12.基金项目
国家自然科学基金面上项目(42171038) （42171038）
新疆"天山英才"青年科技拔尖人才专项(2022TSYCCX0005) （2022TSYCCX0005）
新疆维吾尔自治区自然科学基金重点项目(2022D01D86) （2022D01D86）
