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Light-absorbing impurities accelerate glacier melt in the Central Tibetan Plateau
Li, XF (Li, Xiaofei)1,2; Kang, SC (Kang, Shichang)1,2,3; He, XB (He, Xiaobo)1,4; Qu, B (Qu, Bin)5; Tripathee, L (Tripathee, Lekhendra)1,6; Jing, ZF (Jing, Zhefan)1; Paudyal, R (Paudyal, Rukumesh)1,2,6; Li, Y (Li, Yang)2,7; Zhang, YL (Zhang, Yulan)1; Yan, FP (Yan, Fangping)5; Li, G (Li, Gang)8; Li, CL (Li, Chaoliu)7; Kang, SC
AbstractLight-absorbing impurities (LAIs), such as organic carbon (OC), black carbon (BC), and mineral dust (MD) deposited on the glacier surface can reduce albedo, thus accelerating the glacier melt Surface fresh snow, aged snow, granular ice, and snowpits samples were collected between August 2014 and October 2015 on the Xiao Dongkemadi (XDKMD) glacier (33 degrees 04'N, 92 degrees 04'E) in the central Tibetan Plateau (TP). The Spatiotemporal variations of LAIs concentrations in the surface snow/ice were observed to be consistent, differing mainly in magnitudes. LAIs concentrations were found to be in the order: granular ice > snowpit > aged snow > fresh snow, which must be because of post-depositional effects and enrichment. In addition, more intense melting led to higher LAIs concentrations exposed to the surface at a lower elevation, suggesting a strong negative relationship between LA's concentrations and elevation. The scavenging efficiencies of OC and BC were same (0.07 +/- 0.02 for OC, 0.07 +/- 0.01 for BC), and the highest enrichments was observed in late September and August for surface snow and granular ice, respectively. Meanwhile, as revealed by the changes in the OC/BC ratios, intense glacier melt mainly occurred between August and October. Based on the SNow ICe Aerosol Radiative (SNICAR) model simulations, BC and MD in the surface snow/ice were responsible for about 52% +/- 19% and 25% +/- 14% of the albedo reduction, while the radiative forcing (RF) were estimated to be 42.74 +/- 40.96 W m(-2) and 21.23 +/- 22.08 W m(-2), respectively. Meanwhile, the highest RF was observed in the granular ice, suggesting that the exposed glaciers melt and retreat more easily than the snow distributed glaciers. Furthermore, our results suggest that BC was the main forcing factor compared with MD in accelerating glacier melt during the melt season in the Central TP. (C) 2017 Elsevier B.V. All rights reserved.
Subject Area自然地理学
WOS IDWOS:000399845800051
Indexed BySCI
KeywordBlack-carbon High Asia Snow China Climate Aerosols Albedo Ice Sensitivity Balance
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Cooperation Status国际
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Document Type期刊论文
Corresponding AuthorKang, SC
Affiliation1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
4.State Key Lab Cryospher Sci, Tanggula Cryosphere & Environm Observat Stn, Lanzhou 730000, Peoples R China.
5.Lappeenranta Univ Technol, Lab Green Chem, Sammonkatu 12, FIN-50130 Mikkeli, Finland.
6.HERI, Kathmandu, Nepal.
7.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Iand Surface P, Beijing 100101, Peoples R China.
8.China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Disaster Reducing Ga, Lanzhou 730020, Peoples R China.
Recommended Citation
GB/T 7714
Li, XF ,Kang, SC ,He, XB ,et al. Light-absorbing impurities accelerate glacier melt in the Central Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,587-588(0):482-490.
APA Li, XF .,Kang, SC .,He, XB .,Qu, B .,Tripathee, L .,...&Kang, SC.(2017).Light-absorbing impurities accelerate glacier melt in the Central Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,587-588(0),482-490.
MLA Li, XF ,et al."Light-absorbing impurities accelerate glacier melt in the Central Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 587-588.0(2017):482-490.
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