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Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting
Li, Y (Li, Yang)1,2,3; Kang, SC (Kang, Shichang)3,4,5; Yan, FP (Yan, Fangping)2; Chen, JZ (Chen, Jizu)4; Wang, K (Wang, Kun)4; Paudyal, R (Paudyal, Rukumesh)4; Liu, JS (Liu, Jingshi)1; Qin, X (Qin, Xiang)4; Sillanpaa, M (Sillanpaa, Mika)2
Source PublicationJOURNAL OF GLACIOLOGY
2019
Volume65Issue:252Pages:633-644
DOI10.1017/jog.2019.41
Abstract

Cryoconite is a dark-coloured granular sediment that contains biological and mineralogical components, and it plays a pivotal role in geochemistry, carbon cycling and glacier mass balance. In this work, we collected cryoconite samples from Laohugou Glacier No. 12 (LHG) on the north-eastern Tibetan Plateau during the summer of 2015 and measured the spectral albedo. To explore the impacts of this sediment on surface ablation, the ice melting differences between the cryoconite-free (removed) ice and the intact layers were compared. The results showed that the mean concentrations of black carbon (BC), organic carbon (OC) and total iron (Fe) in the LHG cryoconite were 1.28, 11.18 and 39.94 mg g(-1), respectively. BC was found to play a stronger role in solar light adsorption than OC and free Fe. In addition, ice covered by cryoconite exhibited the lowest mean reflectance (i.e., <0.1). Compared with the cryoconite-free ice surface, cryoconite effectively absorbed solar energy and enhanced glacial melting at a rate of 2.27-3.28 cm d(-1), and free Fe, BC and OC were estimated to contribute 1.01, 0.99 and 0.76 cm d(-1), respectively. This study provides important insights for understanding the role of cryoconite in the glacier mass balance of the northern Tibetan Plateau.

Subject AreaGeosciences
WOS IDWOS:000482507800010
Language英语
Indexed BySCI
KeywordWestern Qilian Mountains No. 12 Glacier Black Carbon Optical-properties Algal Community Spectral Albedo Iron-oxides Mt. Yulong Ice-sheet Snow
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
Cooperation Status国际
ISSN0022-1430
Department环境变化与地表过程重点实验室
URL查看原文
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9205
Collection图书馆
Corresponding AuthorLi, Y (Li, Yang); Kang, SC (Kang, Shichang)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
2.Lappeenranta Univ Technol, Lab Green Chem, Mikkeli 50130, Finland;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;
5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China.
Recommended Citation
GB/T 7714
Li, Y ,Kang, SC ,Yan, FP ,et al. Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting[J]. JOURNAL OF GLACIOLOGY,2019,65(252):633-644.
APA Li, Y .,Kang, SC .,Yan, FP .,Chen, JZ .,Wang, K .,...&Sillanpaa, M .(2019).Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting.JOURNAL OF GLACIOLOGY,65(252),633-644.
MLA Li, Y ,et al."Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting".JOURNAL OF GLACIOLOGY 65.252(2019):633-644.
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