气候变化领域集成服务门户(CCPortal): Light-absorbing impurities on Keqikaer Glacier in western Tien Shan: concentrations and potential impact on albedo reduction

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DOI	10.3724/SP.J.1226.2017.00097
	Light-absorbing impurities on Keqikaer Glacier in western Tien Shan: concentrations and potential impact on albedo reduction
	Zhang, YuLan; Kang, ShiChang; Xu, Min; Sprenger, Michael; Gao, TanGuang; Cong, ZhiYuan; Li, ChaoLiu; Guo, JunMing; Xu, ZhiQiang; Li, Yang; Li, Gang; Li, XiaoFei; Liu, YaJun; Han, HaiDong
通讯作者	Kang, SC (通讯作者)
发表日期	2017
ISSN	1674-3822
起始页码	97
结束页码	111
卷号	9 期号:2
英文摘要	Light-absorbing impurities on glaciers are important factors that influence glacial surface albedo and accelerate glacier melt. In this study, the quantity of light-absorbing impurities on Keqikaer Glacier in western Tien Shan, Central Asia, was measured. We found that the average concentrations of black carbon was 2,180 ng/g, with a range from 250 ng/g to more than 10,000 ng/g. The average concentrations of organic carbon and mineral dust were 1,738 ng/g and 194 mu g/g, respectively. Based on simulations performed with the Snow Ice Aerosol Radiative model simulations, black carbon and dust are responsible for approximately 64% and 9%, respectively, of the albedo reduction, and are associated with instantaneous radiative forcing of 323.18 W/m(2) (ranging from 142.16 to 619.25 W/m(2)) and 24.05 W/m(2) (ranging from 0.15 to 69.77 W/m(2)), respectively. For different scenarios, the albedo and radiative forcing effect of black carbon is considerably greater than that of dust. The estimated radiative forcing at Keqikaer Glacier is higher than most similar values estimated by previous studies on the Tibetan Plateau, perhaps as a result of black carbon enrichment by melt scavenging. Light-absorbing impurities deposited on Keqikaer Glacier appear to mainly originate from central Asia, Siberia, western China (including the Taklimakan Desert) and parts of South Asia in summer, and from the Middle East and Central Asia in winter. A footprint analysis indicates that a large fraction (>60%) of the black carbon contributions on Keqikaer Glacier comes from anthropogenic sources. These results provide a scientific basis for regional mitigation efforts to reduce black carbon.
关键词	BLACK-CARBON KOXKAR GLACIER BROWN CARBON SNOW ALBEDO CLIMATE ICE PARTICLES ABSORPTION INVENTORY MODEL
英文关键词	light-absorbing impurities; black carbon; mineral dust; glacier; snow albedo; Tien Shan
语种	英语
WOS研究方向	Physical Geography
WOS类目	Geography, Physical
WOS记录号	WOS:000412780900001
来源期刊	SCIENCES IN COLD AND ARID REGIONS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259052
推荐引用方式 GB/T 7714	Zhang, YuLan,Kang, ShiChang,Xu, Min,et al. Light-absorbing impurities on Keqikaer Glacier in western Tien Shan: concentrations and potential impact on albedo reduction[J]. 中国科学院青藏高原研究所,2017,9(2).
APA	Zhang, YuLan.,Kang, ShiChang.,Xu, Min.,Sprenger, Michael.,Gao, TanGuang.,...&Han, HaiDong.(2017).Light-absorbing impurities on Keqikaer Glacier in western Tien Shan: concentrations and potential impact on albedo reduction.SCIENCES IN COLD AND ARID REGIONS,9(2).
MLA	Zhang, YuLan,et al."Light-absorbing impurities on Keqikaer Glacier in western Tien Shan: concentrations and potential impact on albedo reduction".SCIENCES IN COLD AND ARID REGIONS 9.2(2017).