气候变化领域集成服务门户(CCPortal): Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting

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DOI	10.1017/jog.2019.41
	Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting
	Li, Yang; Kang, Shichang; Yan, Fangping; Chen, Jizu; Wang, Kun; Paudyal, Rukumesh; Liu, Jingshi; Qin, Xiang; Sillanpaa, Mika
发表日期	2019
ISSN	0022-1430
EISSN	1727-5652
卷号	65 期号:252
英文摘要	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.
关键词	black carbon cryoconite enhanced melting spectral albedo Tibetan plateau
学科领域	Physical Geography; Geology
语种	英语
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
来源期刊	JOURNAL OF GLACIOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112023
作者单位	Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Yang,Kang, Shichang,Yan, Fangping,et al. Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting[J]. 中国科学院西北生态环境资源研究院,2019,65(252).
APA	Li, Yang.,Kang, Shichang.,Yan, Fangping.,Chen, Jizu.,Wang, Kun.,...&Sillanpaa, Mika.(2019).Cryoconite on a glacier on the north-eastern Tibetan plateau: light-absorbing impurities, albedo and enhanced melting.JOURNAL OF GLACIOLOGY,65(252).
MLA	Li, Yang,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).