Characteristics of Stable Isotopes and Analysis of Water Vapor Sources of Precipitation at the Northern Slope of the Qilian Mountains

doi:10.13227/j.hjkx.201905218

	Characteristics of Stable Isotopes and Analysis of Water Vapor Sources of Precipitation at the Northern Slope of the Qilian Mountains
	Zhang, Bai-Juan 1,2; Li, Zong-Xing 2; Wang, Yu 1; Li, Yong-Ge 2; Lü, Yue-Min 2; Yuan, Rui-Feng 2; Gui, Juan 2
刊名	Huanjing Kexue/Environmental Science
	2019-12-15
卷号	40 期号:12 页码:5272-5285
关键词	Evaporation Isotopes Landforms Temperature Water piping systems Water vapor Annual precipitation Evaporation rate Evolution of precipitation Meteoric water lines Meteorological factors Precipitation effects Precipitation samples Seasonal changes
ISSN号	02503301
DOI	10.13227/j.hjkx.201905218
英文摘要	This study is based on precipitation samples from eight sites at the northern slope of the Qilian Mountains, combined with meteorological factors over the same period. Precipitation isotope characteristics, influence factors and the vapor sources of precipitation were analyzed, and the results show that: The stable isotopes of precipitation in the study area show obvious seasonal changes, which are characterized by enrichment in the summer half-year and depletion in the winter half-year. The spatial precipitation δ18O value shows a significant downward trend with increasing altitude, and the altitude effect of the annual precipitation δ18O is -0.19‰/100 m, respectively; At all stations, the slope and intercept of local meteoric water lines show an increasing trend from low altitude to high altitude. The high-altitude mountains above 2 000 m are affected by local water vapor recirculation; The temperature effect is more significant and the temperature effect of δ18O is 0.64‰, and there is only a weak precipitation effect in summer; The results indicate that sub-cloud evaporation has a great influence on the δ18O of precipitation; the average raindrop evaporation rate of δ18O is 23%, 11%, 12%, and 16%,and the δ18O composition has been enriched by 46%, 27%, 38%, and 32% in May, June, July, and August from cloud base to ground, respectively. Under the condition of continuous rainfall in summer, the vapor sources of precipitation mainly come from the west and are affected by local evaporation of water vapor. The study enhances knowledge of isotopic evolution of precipitation and provides a basis for further study of isotopic hydrology in arid regions. © 2019, Science Press. All right reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114231]
专题	能源与动力工程学院
作者单位	1.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730000, China; 2.Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China
推荐引用方式 GB/T 7714	Zhang, Bai-Juan,Li, Zong-Xing,Wang, Yu,et al. Characteristics of Stable Isotopes and Analysis of Water Vapor Sources of Precipitation at the Northern Slope of the Qilian Mountains[J]. Huanjing Kexue/Environmental Science,2019,40(12):5272-5285.
APA	Zhang, Bai-Juan.,Li, Zong-Xing.,Wang, Yu.,Li, Yong-Ge.,Lü, Yue-Min.,...&Gui, Juan.(2019).Characteristics of Stable Isotopes and Analysis of Water Vapor Sources of Precipitation at the Northern Slope of the Qilian Mountains.Huanjing Kexue/Environmental Science,40(12),5272-5285.
MLA	Zhang, Bai-Juan,et al."Characteristics of Stable Isotopes and Analysis of Water Vapor Sources of Precipitation at the Northern Slope of the Qilian Mountains".Huanjing Kexue/Environmental Science 40.12(2019):5272-5285.