Page 119 - 2021年第52卷第9期

［ 48］ 田 立 德 ，姚 檀 栋 ，White J W C，等 . 喜 马 拉 雅 山 中 段 高 过 量 氘 与 西 风 带 水 汽 输 送 有 关［J］. 科 学 通 报 ，
2005，50（7）：669-672 .
［ 49］ GAT J R，KLEIN B，KUSHNIR Y，et al . Isotope composition of air moisture over the Mediterranean Sea：An in⁃
dex of the air-sea interaction pattern［J］. Tellus（B），2003，55（5）：953-965 .

Stable hydrogen-oxygen isotope composition and atmospheric moisture sources
of precipitation in an arid-alpine region：A case study
of the Golmud River Watershed on the north slope of the Kunlun Mountains

RAO Wenbo ，LI Yaowei ，TAN Hongbing ，
1
1
1
2
3
LI Yongguo ，WEN Chuan ，ZHANG Xiying 4
（1. College of Earth Sciences and Engineering，Hohai University，Nanjing 211100，China；
2. Qinghai Hydrogeology and Engineering Geology and Environgeology Survey Institute，Xining 810008，China；
3. Golmud Station of Qinghai Hydrological and Water Resources Forecasting Center，Golmud 816099，China；
4. Qinghai Institute of Salt Lakes，CAS，Xining 810008，China）
Abstract： The source of precipitation is an important content in the hydrologic study in arid-alpine re⁃
gions. In this study， 51 precipitation event samples were collected from June to October 2019 at Nachitai
of the Golmud River watershed on the northern slope of the Kunlun Mountains，and the stable hydrogen-ox⁃
ygen isotope composition and atmospheric moisture of precipitation were investigated. The results showed
that the δ O and δ H values of precipitation varied greatly and were mainly controlled by air temperature；
2
18
precipitation experienced multiple evaporation-condensation processes and its stable H-O isotope data most⁃
2 18
ly fell above the global meteoric water line； and the local meteoric water line was δ H=7.4×δ O+13.2 for
the mountainous region of the Golmud River watershed， and may characterize the whole watershed， which
provides a good reference for studying the watershed-scale hydrological cycle. The analyses of deuterium ex⁃
cess values revealed that the westerly circulation and local moisture transport were the main contributors to
mountainous precipitation in the Golmud River watershed. The HYSPLIT model simulation further showed
that atmospheric moisture of high levels was carried by the westerly circulation and atmospheric moisture of
low levels were recharged by the inland moisture cycle. The findings are helpful to deeply understand the
water cycle in the arid-alpine areas and also may provide a scientific basis for local water resource manage⁃
ment.
Keywords： stable H-O isotope compositions； atmospheric precipitation； HYSPLIT model； moisture source；
arid-alpine watershed

（责任编辑：杨 虹）

— 1125 —