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DOI	10.1016/j.scitotenv.2021.149178
	Photobleaching reduces the contribution of dissolved organic carbon to glacier melting in the Himalayas and the Tibetan Plateau
	Hu, Zhaofu; Kang, Shichang; Chen, Qingchai; Xu, Jianzhong; Zhang, Chao; Li, Xiaofei; Yan, Fangping; Zhang, Yulan; Chen, Pengfei; Li, Chaoliu
通讯作者	Kang, SC (通讯作者)，Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	797
英文摘要	Dissolved organic carbon (DOC) makes an important contribution to glacier melting in the Himalayas and the Tibetan Plateau (HTP). Photobleaching can effectively reduce the light absorption ability of DOC, further changing its impact on glacier melting, which is not yet well researched in the HiP. Therefore, snowpit samples from the Bayi, Ganglongjiama (GLJM), Jiemayangong (JMYZ) and Demula (DML) glaciers were collected to study the influence of photobleaching on the light absorption ability of DOC and its impact on glacier melting. The results showed that the DOC concentration of snowpit samples, which was affected by the melting state and photobleaching, decreased from the northern HTP to the southern HIP. At an early stage of melting, the mass absorption cross-section value at 365 nm (MAC 365 ) values showed a negative correlation with DOC concentrations in the snowpit at the JMYZ and DML glaciers, indicating that colored DOC tended to be concentrated in the snowpit during the melting process. With the aggravation of ablation, some snowpit samples in the GLJM and Bayi glaciers had both low concentrations and MAC 365 values of DOC due to the reduced influence of photobleaching on the light absorption ability of DOC. Similarly, two fluorescence components (one protein-like component and one hurnic-like component) were identified in the extracted DOC at the JMYZ and DML glaciers, while those components were not detected in the GLJM glacier. Based on the sources of fluorescent DOC and five-day backward air mass trajectories, long-distance transport of pollutants from South Asia was an important source of snowpit DOC in the southern HIP. In this study, photobleaching can effectively remove colored and fluorescent DOC from snowpit samples in the HIP, further reducing the radiation forcing and glacier melting caused by DOC. (C) 2021 Elsevier B.V. All rights reserved.
关键词	LIGHT-ABSORPTION CHARACTERISTICS EMISSION MATRIX SPECTROSCOPY BLACK CARBON REMOTE STATIONS MATTER FLUORESCENCE WATER ICE AEROSOLS MARINE
英文关键词	Melting process; Dissolved organic carbon; Light absorption; Fluorescence; The Himalayan and Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000697727100016
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/253885
作者单位	[Hu, Zhaofu; Kang, Shichang; Xu, Jianzhong; Yan, Fangping; Zhang, Yulan; Chen, Pengfei; Li, Chaoliu] Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Chen, Qingchai; Li, Xiaofei] Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China; [Zhang, Chao] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China; [Kang, Shichang; Zhang, Chao] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hu, Zhaofu,Kang, Shichang,Chen, Qingchai,et al. Photobleaching reduces the contribution of dissolved organic carbon to glacier melting in the Himalayas and the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,797.
APA	Hu, Zhaofu.,Kang, Shichang.,Chen, Qingchai.,Xu, Jianzhong.,Zhang, Chao.,...&Li, Chaoliu.(2021).Photobleaching reduces the contribution of dissolved organic carbon to glacier melting in the Himalayas and the Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,797.
MLA	Hu, Zhaofu,et al."Photobleaching reduces the contribution of dissolved organic carbon to glacier melting in the Himalayas and the Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 797(2021).