气候变化领域集成服务门户(CCPortal): Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau

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DOI	10.1016/j.scitotenv.2019.05.478
	Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau
	Gao, Tanguang; Kang, Shichang; Chen, Rensheng; Zhang, Taigang; Zhang, Tingjun; Han, Chuntan; Tripathee, Lekhendra; Sillanpaa, Mika; Zhang, Yulan
发表日期	2019
ISSN	0048-9697
EISSN	1879-1026
卷号	686
英文摘要	Riverine dissolved organic carbon (DOC) and its optical properties were investigated in two sub-river basins (Yeniugou and Hulugou river) of the Upper Heihe river basin in the northern Tibetan Plateau. The results showed that DOC concentrations ranged from 025 to 12.2 and 0.18-1.04 mg L-1 for Yeniugou and Hulugou river basin with an average of 0.82 and 0.33 mg L-1, respectively. Export of DOC from the studied river (YNG: similar to 0.86 Gg C yr(-1)) was lesser compared with other large river in the Tibetan Plateau and Arctic regions because of the small drainage area and lower DOC concentrations. There exhibited significant seasonality for DOC in Yeniugou river basin with higher values observed during late spring and summer; however, no such distinct trend was observed for DOC in the studied rivers of Hulugou river basin. In contrast, total dissolved nitrogen showed a slightly lower value during the summer season. A strong relationship was determined between DOC concentrations and spectral UV absorbance at 254 nm (SUVA(254)), absorption coefficients and spectral slope for both sub-river basins, attributing that the riverine DOM in the northern Tibetan Plateau has a remarkably high content of aromatic compounds in late spring and summer. Considering the less snow cover percentage, this study highlights the potential impacts of permafrost thaw on the riverine DOC and its characteristics in the permafrost region under climate change. (C) 2019 Elsevier B.V. All rights reserved.
关键词	DOC River water Permafrost Absorbance Spectral slope Tibetan Plateau
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
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/112016
作者单位	Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Coll Earth & Environm Sci, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Gao, Tanguang,Kang, Shichang,Chen, Rensheng,et al. Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2019,686.
APA	Gao, Tanguang.,Kang, Shichang.,Chen, Rensheng.,Zhang, Taigang.,Zhang, Tingjun.,...&Zhang, Yulan.(2019).Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,686.
MLA	Gao, Tanguang,et al."Riverine dissolved organic carbon and its optical properties in a permafrost region of the Upper Heihe River basin in the Northern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 686(2019).