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Immobilization of relic anthropogenic dissolved organic matter from alpine rivers in the Himalayan-Tibetan Plateau in winter
Chen, ML (Chen, Meilian)1; Li, CL (Li, Chaoliu)2,3; Zeng, C (Zeng, Chen)2,3; Zhang, F (Zhang, Fan)2; Raymond, PA (Raymond, Peter A.)4; Hur, J (Hur, Jin)5
Source PublicationWATER RESEARCH
2019
Volume160Issue:0Pages:97-106
DOI10.1016/j.watres.2019.05.052
Abstract

The Tibetan Plateau is a critical ecosystem that sensitively responds to ongoing glacier shrinkage and permafrost thaw. Dissolved organic matter (DOM) in Tibetan Alpine rivers plays pivotal roles in the biogeochemical cycling of elements and nutrients at regional and even global scales, impacting water quality, downstream environments, and climate. However, little is known about the characteristics and dynamics of DOM in these watersheds. We investigated five major Himalayan rivers in the southern Tibetan Plateau, utilizing bulk dissolved organic carbon (DOC), optical properties, and molecular formulas. We found extremely low DOC and fluorescent DOM (FDOM) levels in the rivers (average DOC: 0.25-0.87 mg L-1, FDOM: 0.02-0.05 RU) with a highly degraded molecular signature, which was enriched with heteroatomic molecular formulas (S-containing: 58-72%, N-containing: 61-86%) and condensed aromatics (31-39% vs. similar to 11% in world major rivers). Further, 81-99% of the condensed aromatics was identified as dissolved black nitrogen (DBN) with multiple nitrogen atoms, typical for grassy biomass combustion. The findings highlighted potentially fast DOM remineralization leading to the release of CO2 and enriched apparently anthropogenic condensed aromatics and heteroatomic formulas in what have been considered pristine Tibetan rivers. These findings should be considered in future biogeochemical models and ecosystem management. (C) 2019 Elsevier Ltd. All rights reserved.

Subject AreaEnvironmental Sciences
WOS IDWOS:000474327700010
Language英语
Indexed BySCI
KeywordLight-absorption Characteristics Molecular-weight Surface Accumulation Carbon-dioxide Fluorescence Ancient Transformation Glaciers Soils Biolability
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
Cooperation Status国际
ISSN0043-1354
Department环境变化与地表过程重点实验室
URL查看原文
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9184
Collection图书馆
Corresponding AuthorChen, ML (Chen, Meilian); Li, CL (Li, Chaoliu); Hur, J (Hur, Jin)
Affiliation1.Guangdong Technion Israel Inst Technol, Environm Program, Shantou 515063, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
4.Yale Sch Forestry & Environm Studies, New Haven, CT 06511 USA;
5.Sejong Univ, Dept Environm & Energy, Seoul 05006, South Korea.
Recommended Citation
GB/T 7714
Chen, ML ,Li, CL ,Zeng, C ,et al. Immobilization of relic anthropogenic dissolved organic matter from alpine rivers in the Himalayan-Tibetan Plateau in winter[J]. WATER RESEARCH,2019,160(0):97-106.
APA Chen, ML ,Li, CL ,Zeng, C ,Zhang, F ,Raymond, PA ,&Hur, J .(2019).Immobilization of relic anthropogenic dissolved organic matter from alpine rivers in the Himalayan-Tibetan Plateau in winter.WATER RESEARCH,160(0),97-106.
MLA Chen, ML ,et al."Immobilization of relic anthropogenic dissolved organic matter from alpine rivers in the Himalayan-Tibetan Plateau in winter".WATER RESEARCH 160.0(2019):97-106.
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