Sources and sink of black carbon in Arctic Ocean sediments

doi:10.1016/j.scitotenv.2019.06.437

	Sources and sink of black carbon in Arctic Ocean sediments
	Ren, Peng 1; Liu, Yanguang 2,3; Shi, Xuefa 2; Sun, Shuwen 4; Fan, Di 4; Wang, Xuchen 1,4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-11
卷号	689 页码:912-920
关键词	Black carbon Radiocarbon Marine sediment Arctic Ocean Organic matter
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.06.437
英文摘要	The concentrations and carbon isotopic (C-13, C-14) compositions of total organic carbon (TOC) and black carbon (BC) were measured for four sediment cores collected from the shelf to slope in the Arctic Ocean. Contents of TOC and BC ranged from 0.46% to 1.94% and 0.04% to 0.13% by dry weight, and BC accounted for 3.5% to 15.2% of the TOC preserved in the shelf and slope sediments. Sediment of the Chukchi shelf contained relatively high BC contents compared with the sediments of the Arctic slope, suggesting strong influence from the river and terrestrial inputs to the shelf region. Radiocarbon measurements revealed that the ages of BC are in the range of 7330 to 29,700 years (before present) and they are 4093 to 7723 years older than the C-14 ages of TOC preserved in the same sediment depths. Based on an isotopic mass balance model, we calculated that fossil fuel combustion contributed 62-96%, and biomass burning contributed 4-38% of the BC pool in the sediments of the study area. This "slow-cycling" old BC is an important fraction of the inert organic carbon pool preserved in the sediments, and represents a significant sink of atmospheric CO2 and global carbon cycle. With the thawing permafrost caused by continuous global warming, the size of this BC pool mobilized and exported by rivers to the Arctic Ocean could increase in the future. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	Marine S& T Fund of Shandong Province for Qingdao National Laboratory for Marine Science and Technology[2018SDKJ0104-3]
WOS关键词	POLYCYCLIC AROMATIC-HYDROCARBONS ; ORGANIC-CARBON ; SURFACE SEDIMENTS ; OXIDATION METHOD ; SHELF SEDIMENTS ; AMINO-ACIDS ; QUANTIFICATION ; PRESERVATION ; CHARCOAL ; MATTER
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000482379400088
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/30058]
专题	自然资源部第一海洋研究所
通讯作者	Wang, Xuchen
作者单位	1.Ocean Univ China, Inst Adv Ocean Study, Key Lab Marine Chem Theory & Technol, Qingdao, Shandong, Peoples R China 2.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Shandong, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Shandong, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Ctr Isotope Geochem & Geochronol, Qingdao, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Ren, Peng,Liu, Yanguang,Shi, Xuefa,et al. Sources and sink of black carbon in Arctic Ocean sediments[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,689:912-920.
APA	Ren, Peng,Liu, Yanguang,Shi, Xuefa,Sun, Shuwen,Fan, Di,&Wang, Xuchen.(2019).Sources and sink of black carbon in Arctic Ocean sediments.SCIENCE OF THE TOTAL ENVIRONMENT,689,912-920.
MLA	Ren, Peng,et al."Sources and sink of black carbon in Arctic Ocean sediments".SCIENCE OF THE TOTAL ENVIRONMENT 689(2019):912-920.