Mechanisms of isotopic control of precipitation in the Yellow River source region

降水 环境科学 水文学(农业) 地质学 自然地理学 气候学 气象学 地理 岩土工程
作者
Linlin Ye,Xinrui Lin,Guofeng Zhu,Yuwei Liu,Dongdong Qiu,Wenhao Zhang,Jiawei Liu,Siyu Lu
出处
期刊:Hydrological Processes [Wiley]
卷期号:38 (2)
标识
DOI:10.1002/hyp.15087
摘要

Abstract The study of water vapour sources and water cycle patterns in the Yellow River source region is of great significance for ensuring water resource security in the arid and semi‐arid regions of northern China. We established a precipitation stable isotope observation system in the Yellow River source region for three consecutive years (2020–2022), systematically analysed the spatial and temporal distribution characteristics of precipitation stable isotopes 2 H and 18 O in the Yellow River source region and their interrelationships with environmental factors and topography, and explored the regional water vapour transport pathways by using the HYSPLIT model and combining with the global reanalysis data. The results show that: (1) the δ 18 O and δ 2 H values of precipitation in the Yellow River source region follow the seasonal pattern, with the first half of the year being richer than the second half of the year; (2) the spatial variations of δ 18 O of precipitation in the Yellow River source region show a low in the southwest and a high in the northeast; (3) the water vapour source in the source area is basically stable, and the complex transport paths and the cross‐effects of the local factors determine the stable isotope characteristics of the water, and the stable isotope characteristics of the water are determined by the cross‐effects of the local factors, because the source of the water vapour and the local factors such as the height will not change significantly in the short term. Since the source of water vapour and local elevation factors will not change significantly in the short term, the precipitation pattern in the source area of the Yellow River can be considered to be basically stable.
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