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Dissolved organic carbon fractionation accelerates glacier-melting: A case study in the northern Tibetan Plateau
Hu, ZF (Hu, Zhaofu)1,5; Kang, SC (Kang, Shichang)1,4,5; Yan, FP (Yan, Fangping)3; Zhang, YL (Zhang, Yulan)1; Li, Y (Li, Yang)2,3,5; Chen, PF (Chen, Pengfei)1; Qin, X (Qin, Xiang)1; Wang, K (Wang, Kun)1,5; Gao, SP (Gao, Shaopeng)2; Li, CL (Li, Chaoliu)2,4
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
2018-06-15
Volume627Issue:0Pages:579-585
DOI10.1016/j.scitotenv.2018.01.265
AbstractIn glacierized regions, melting process has a significant effect on concentrations and light absorption characteristics of dissolved organic carbon (DOC), potentially resulting in variations of its radiative forcing, which is not yet relevant research at glacier region of the Tibetan Plateau (TP). In this study, DOC fractionation and its radiative forcing change during the melting process were investigated at Laohugou glacier No. 12 (LHG glacier) in western Qilian Mts., northern TP. DOC concentrations in fresh snow, snowpit and surface ice samples were 0.38 +/- 0.06, 0.22 +/- 0.11 and 0.60 +/- 0.21 mg L-1, respectively. Their mass absorption cross-section at 365 nm (MAC(365)) were 0.65 +/- 0.16, 4.71 +/- 3.68 and 1.44 +/- 0.52 m(2) g(-1), respectively. The MAC(365) values of snowpit samples showed a significant negative correlation with DOC concentrations, indicating DOC with high MAC(365) values were likely to be kept in snow during the melting process. Topsoil samples of LHG glacierized region likely contributed a lot to snowpit DOC with high MAC365 values due to their similar absorption spectra. Spatially, the DOC concentration of surface ice samples increased from terminus to the upper part of the glacier. Correspondingly, the MAC(365) value showed decreased trend. In the freezing experiment on surface ice and topsoil samples, small part of DOC with high MAC(365) value was also likely to enter first frozen solid phase. In addition, the radiative forcing caused by snowpit and surface ice DOC increased around 7.64 +/- 2.93 and 4.95 +/- 1.19 times relative to fresh snow DOC, indicating the snow/ice melting caused by increased light-absorbing DOC needs to be considered in the future research. (c) 2018 Elsevier B.V. All rights reserved.
WOS IDWOS:000431848500056
Language英语
Indexed BySCIE
KeywordLIGHT-ABSORPTION CHARACTERISTICS ABSORBING IMPURITIES CHEMICAL-COMPOSITION REMOTE STATIONS MATTER AEROSOLS RELEASE ALPINE ALBEDO SNOW
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Cooperation Status国际
ISSN0048-9697
Department环境变化与地表过程重点实验室
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8631
Collection图书馆
Affiliation1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China;
3.Lappeenranta Univ Technol, Lab Green Chem, Sammonkatu 12, Mikkeli 50130, Finland;
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
5.Univ Chinese Acad Sci, Beijing 100039, Peoples R China.
Recommended Citation
GB/T 7714
Hu, ZF ,Kang, SC ,Yan, FP ,et al. Dissolved organic carbon fractionation accelerates glacier-melting: A case study in the northern Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,627(0):579-585.
APA Hu, ZF .,Kang, SC .,Yan, FP .,Zhang, YL .,Li, Y .,...&Li, CL .(2018).Dissolved organic carbon fractionation accelerates glacier-melting: A case study in the northern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,627(0),579-585.
MLA Hu, ZF ,et al."Dissolved organic carbon fractionation accelerates glacier-melting: A case study in the northern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 627.0(2018):579-585.
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