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DOI	10.1016/j.watres.2019.05.082
	Carbon and mercury export from the Arctic rivers and response to permafrost degradation
	Mu, Cuicui; Zhang, Feng; Chen, Xu; Ge, Shemin; Mu, Mei; Jia, Lin; Wu, Qingbai; Zhang, Tingjun
发表日期	2019
ISSN	0043-1354
起始页码	54
结束页码	60
卷号	161
英文摘要	Arctic rivers export a large amount of organic carbon (OC) and mercury (Hg) to Arctic oceans. Because there are only a few direct calculations of OC and Hg exports from these large rivers, very little is known about their response to changes in the active layer in northern permafrost-dominated areas. In this study, multiyear data sets from the Arctic Great Rivers Observatory (ArcticGRO) are used to estimate the export of dissolved organic carbon (DOC), particulate organic carbon (POC), total mercury (THg) and methylmercury (MeHg) from the six largest rivers (Yenisey, Lena, Ob, Mackenzie, Yukon and Kolyma) draining to the Arctic Ocean. From 2003 to 2017, annual DOC and POC export to the Arctic Ocean was approximately 21612 Gg and 2728 Gg, and the exports of Hg and MeHg to the Arctic Ocean were approximately 20090 kg and 110 kg (0.002% of the total Hg stored in the northern hemisphere active layer). There were great variations in seasonal OC and Hg concentrations and chemical characteristics, with higher fluxes in spring and lower fluxes in winter (baseline). DOC and Hg concentrations are significantly positively correlated to discharge, as discharge continues to increase in response to a deepening active layer thickness during recent past decades. This study shows that previous results likely underestimated DOC exports from rivers in the circum-Arctic regions, and both OC and Hg exports will increase under predicted climate warming scenarios. (C) 2019 Elsevier Ltd. All rights reserved.
英文关键词	Organic carbon; Mercury; Riverine export; Active layer; Discharge
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS关键词	DISSOLVED ORGANIC-CARBON ; MACKENZIE RIVER ; YUKON RIVER ; OCEAN ; BIODEGRADABILITY ; DISCHARGE ; CLIMATE ; BASIN ; SEA
WOS记录号	WOS:000475999400007
来源期刊	WATER RESEARCH
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/240299
作者单位	[Mu, Cuicui; Zhang, Feng; Chen, Xu; Mu, Mei; Jia, Lin; Zhang, Tingjun] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Gansu, Peoples R China; [Mu, Cuicui] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Gansu, Peoples R China; [Mu, Cuicui; Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Ge, Shemin] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA; [Zhang, Tingjun] Univ Cooperat Polar Res, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Mu, Cuicui,Zhang, Feng,Chen, Xu,et al. Carbon and mercury export from the Arctic rivers and response to permafrost degradation[J]. 中国科学院西北生态环境资源研究院,2019,161.
APA	Mu, Cuicui.,Zhang, Feng.,Chen, Xu.,Ge, Shemin.,Mu, Mei.,...&Zhang, Tingjun.(2019).Carbon and mercury export from the Arctic rivers and response to permafrost degradation.WATER RESEARCH,161.
MLA	Mu, Cuicui,et al."Carbon and mercury export from the Arctic rivers and response to permafrost degradation".WATER RESEARCH 161(2019).