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Post-depositional enrichment of black soot in snow-pack and accelerated melting of Tibetan glaciers
Xu, BQ (Xu, Baiqing)[1]; Cao, JJ (Cao, Junji)[2]; Joswiak, DR (Joswiak, Daniel R.)[1]; Liu, XQ (Liu, Xianqin)[3]; Zhao, HB (Zhao, Huabiao)[1]; He, JQ (He, Jianqiao)[4]
2012-03-30
Source PublicationENVIRONMENTAL RESEARCH LETTERS
Volume7Issue:1Pages:14022
Subtype期刊论文
Abstract

The post-depositional enrichment of black soot in snow-pack was investigated by measuring the redistribution of black soot along monthly snow-pits on a Tien Shan glacier. The one-year experiment revealed that black soot was greatly enriched, defined as the ratio of concentration to original snow concentration, in the unmelted snow-pack by at least an order of magnitude. Greatest soot enrichment was observed in the surface snow and the lower firn-pack within the melt season percolation zone. Black carbon (BC) concentrations as high as 400 ng g(-1) in the summer surface snow indicate that soot can significantly contribute to glacier melt. BC concentrations reaching 3000 ng g(-1) in the bottom portion of the firn pit are especially concerning given the expected equilibrium-line altitude (ELA) rise associated with future climatic warming, which would expose the dirty underlying firn and ice. Since most of the accumulation area on Tibetan glaciers is within the percolation zone where snow densification is characterized by melting and refreezing, the enrichment of black soot in the snow-pack is of foremost importance. Results suggest the effect of black soot on glacier melting may currently be underestimated.

KeywordBlack Soot Enrichment Glacier Melting
DOI10.1088/1748-9326/7/1/014022
Indexed BySCIE
Language英语
Citation statistics
Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10171
Collection粉尘与环境研究室
Corresponding AuthorXu, BQ (Xu, Baiqing)[1]
Affiliation1.Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of TibetanPlateau Research, Chinese Academy of Sciences, Beijing 100085, People’s Republic of China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment,Chinese Academy of Sciences, Xi’an 710075, People’s Republic of China;
3.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,People’s Republic of China;
4.State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and EngineeringResearch Institute, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
Recommended Citation
GB/T 7714
Xu, BQ ,Cao, JJ ,Joswiak, DR ,et al. Post-depositional enrichment of black soot in snow-pack and accelerated melting of Tibetan glaciers[J]. ENVIRONMENTAL RESEARCH LETTERS,2012,7(1):14022.
APA Xu, BQ ,Cao, JJ ,Joswiak, DR ,Liu, XQ ,Zhao, HB ,&He, JQ .(2012).Post-depositional enrichment of black soot in snow-pack and accelerated melting of Tibetan glaciers.ENVIRONMENTAL RESEARCH LETTERS,7(1),14022.
MLA Xu, BQ ,et al."Post-depositional enrichment of black soot in snow-pack and accelerated melting of Tibetan glaciers".ENVIRONMENTAL RESEARCH LETTERS 7.1(2012):14022.
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