气候变化领域集成服务门户(CCPortal): Production of Ancient Dissolved Organic Carbon in Arctic Ocean Sediment: A Pathway of Carbon Cycling in the Extreme Environment

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DOI	10.1029/2020GL087119
	Production of Ancient Dissolved Organic Carbon in Arctic Ocean Sediment: A Pathway of Carbon Cycling in the Extreme Environment
	Fu W.; Qi Y.; Liu Y.; Wang X.; Druffel E.M.; Xu X.; Ren P.; Sun S.; Fan D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:5
英文摘要	We report quantitative carbon isotope evidence showing that porewater dissolved organic carbon (DOC) is produced from different sources in Arctic Ocean sediments, resulting in dramatic changes in both δ13C and Δ14C values of DOC. The very low δ13C (−42.7‰) and Δ14C (−947‰) values measured for porewater DOC indicate that bacteria consume methane hydrate-derived OC and convert a significant fraction of this δ13C depleted and old OC (44–97%) into DOC in the sediments of the Arctic Ocean. We suggest that the production of extremely old, methane-derived porewater DOC (5,430–23,600 years) in Arctic Ocean sediment is an important pathway for carbon cycling that provides not only a necessary energy source for microbial communities in this extreme environment but also an ancient DOC source that could flux and contribute to the old and biologically recalcitrant DOC found in the deep ocean. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Dissolution; Gas hydrates; Hydration; Isotopes; Methane; Oceanography; Sediments; Stream flow; Arctic ocean; Dissolved organic carbon; Methane hydrates; Radiocarbon; Stable carbon isotopes; Organic carbon; carbon cycle; carbon isotope; carbon isotope ratio; dissolved organic carbon; methane; porewater; radiocarbon dating; sediment chemistry; sediment-water interface; Arctic Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170591
作者单位	Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Center for Frontier Science of Deep Ocean and Earth System, Ocean University of China, Qingdao, China; Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China; Center for Isotope Geochemistry and Geochronology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Department of Earth System Science, University of California, Irvine, CA, United States
推荐引用方式 GB/T 7714	Fu W.,Qi Y.,Liu Y.,et al. Production of Ancient Dissolved Organic Carbon in Arctic Ocean Sediment: A Pathway of Carbon Cycling in the Extreme Environment[J],2020,47(5).
APA	Fu W..,Qi Y..,Liu Y..,Wang X..,Druffel E.M..,...&Fan D..(2020).Production of Ancient Dissolved Organic Carbon in Arctic Ocean Sediment: A Pathway of Carbon Cycling in the Extreme Environment.Geophysical Research Letters,47(5).
MLA	Fu W.,et al."Production of Ancient Dissolved Organic Carbon in Arctic Ocean Sediment: A Pathway of Carbon Cycling in the Extreme Environment".Geophysical Research Letters 47.5(2020).