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Nonmonsoon Precipitation Dominates Groundwater Recharge Beneath a Monsoon-Affected Glacier in Tibetan Plateau

文献类型：期刊论文

作者Kong, Yanlong1,2,5; Wang, Ke1,2,5; Pu, Tao4; Shi, Xiaoyi3
刊名JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
出版日期2019-10-21
页码18
关键词Groundwater recharge Isotope Monsoon Glacier
ISSN号2169-897X
DOI10.1029/2019JD030492
英文摘要Groundwater recharge is poorly understood beneath the glacier due to the complex sampling conditions, although it is sensitive to the global change. Here we carried out the sampling and isotopic analysis on groundwater, ice-melt water, river, and precipitation through a hydrological year at the lowest glacier of Mingyong in Hengduan Mountains, Southeastern Tibetan Plateau. The precipitation during the monsoon seasons (P-m) are more depleted in heavy isotopes than precipitation during the nonmonsoon seasons (P-nm) due to the influence of monsoon. The ice-melt water and groundwater points are both found located left above the local meteoric water line (delta H-2 = 8.0 delta O-18 + 8.0) and form lines of delta H-2 = 6.3 delta O-18 - 10.0 and delta H-2 = 4.2 delta O-18 - 37.6, respectively. However, their mean isotopic values are both larger than the weighted annual mean of precipitation isotopes. All of the phenomena above points to the occurring of refreezing process after excluding the evaporation process. A theoretical model is built to confirm the refreezing process that causes the lower slope of ice-melt water line. The groundwater line is explained as a mixing line with ice-melt water and precipitation with contributions of 46 +/- 22% and 54 +/- 22%, respectively. For the precipitation contribution, we propose a plausible conceptual model that groundwater comes primarily from P-nm (41 +/- 17%), and minor from P-m (13 +/- 17%). In this context, it is equivalent to 87 +/- 28% groundwater recharged by P-nm because the glacier is mainly accumulated from P-nm. The findings highlight the importance of the P-nm recharging groundwater even in the monsoon-affected glacial regions.
WOS关键词CLIMATE-CHANGE ; HYDROGRAPH SEPARATION ; ISOTOPIC COMPOSITION ; TIANSHAN MOUNTAINS ; STABLE-ISOTOPES ; SOIL-MOISTURE ; WATER ; BASIN ; PALEOALTIMETRY ; FRACTIONATION
资助项目National Natural Science Foundation of China[91647101] ; National Natural Science Foundation of China[U1703122]
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000491768000001
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/95730]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Kong, Yanlong; Pu, Tao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
3.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab West Chinas Environm Syst, Lanzhou, Gansu, Peoples R China
4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Gansu, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Kong, Yanlong,Wang, Ke,Pu, Tao,et al. Nonmonsoon Precipitation Dominates Groundwater Recharge Beneath a Monsoon-Affected Glacier in Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019:18.
APA Kong, Yanlong,Wang, Ke,Pu, Tao,&Shi, Xiaoyi.(2019).Nonmonsoon Precipitation Dominates Groundwater Recharge Beneath a Monsoon-Affected Glacier in Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,18.
MLA Kong, Yanlong,et al."Nonmonsoon Precipitation Dominates Groundwater Recharge Beneath a Monsoon-Affected Glacier in Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES (2019):18.

入库方式： OAI收割

来源：地质与地球物理研究所

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