| 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 Publication | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 2018-06-15 | |
| Volume | 627Issue:0Pages:579-585 |
| DOI | 10.1016/j.scitotenv.2018.01.265 |
| Abstract | In 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 ID | WOS:000431848500056 |
| Language | 英语 |
| Indexed By | SCIE |
| Keyword | LIGHT-ABSORPTION CHARACTERISTICS ABSORBING IMPURITIES CHEMICAL-COMPOSITION REMOTE STATIONS MATTER AEROSOLS RELEASE ALPINE ALBEDO SNOW |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| Cooperation Status | 国际 |
| ISSN | 0048-9697 |
| Department | 环境变化与地表过程重点实验室 |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/8631 |
| Collection | 图书馆 |
| Affiliation | 1.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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| File Name/Size | DocType | Version | Access | License | ||
| 2018171.pdf（1953KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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