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Nonmonsoon Precipitation Dominates Groundwater Recharge Beneath a Monsoon-Affected Glacier in Tibetan Plateau
Kong, Yanlong1,2,3; Wang, Ke1,2,3; Pu, Tao4; Shi, Xiaoyi5
2019-10-21
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
Pages18
AbstractGroundwater 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.
KeywordGroundwater recharge Isotope Monsoon Glacier
DOI10.1029/2019JD030492
Funding OrganizationNational 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
WOS KeywordCLIMATE-CHANGE ; HYDROGRAPH SEPARATION ; ISOTOPIC COMPOSITION ; TIANSHAN MOUNTAINS ; STABLE-ISOTOPES ; SOIL-MOISTURE ; WATER ; BASIN ; PALEOALTIMETRY ; FRACTIONATION
Language英语
Funding ProjectNational Natural Science Foundation of China[91647101] ; National Natural Science Foundation of China[U1703122]
Funding OrganizationNational 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
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000491768000001
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95730
Collection页岩气与地质工程院重点实验室
Corresponding AuthorKong, Yanlong; Pu, Tao
Affiliation1.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.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Gansu, Peoples R China
5.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab West Chinas Environm Syst, Lanzhou, Gansu, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
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.
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