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DOI	10.1038/s41561-022-01017-x
	Carbon and sediment fluxes inhibited in the submarine Congo Canyon by landslide-damming
	Pope, Ed L.; Heijnen, Maarten S.; Talling, Peter J.; Jacinto, Ricardo Silva; Gaillot, Arnaud; Baker, Megan L.; Hage, Sophie; Hasenhundl, Martin; Heerema, Catharina J.; McGhee, Claire; Ruffell, Sean C.; Simmons, Stephen M.; Cartigny, Matthieu J. B.; Clare, Michael A.; Dennielou, Bernard; Parsons, Daniel R.; Peirce, Christine; Urlaub, Morelia
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	845
结束页码	+
卷号	15 期号:10 页码:13
英文摘要	Landslide-dams, which are often transient, can strongly affect the geomorphology, and sediment and geochemical fluxes, within subaerial fluvial systems. The potential occurrence and impact of analogous landslide-dams in submarine canyons has, however, been difficult to determine due to a scarcity of sufficiently time-resolved observations. Here we present repeat bathymetric surveys of a major submarine canyon, the Congo Canyon, offshore West Africa, from 2005 and 2019. We show how an similar to 0.09 km(3) canyon-flank landslide dammed the canyon, causing temporary storage of a further similar to 0.4 km(3) of sediment, containing similar to 5 Mt of primarily terrestrial organic carbon. The trapped sediment was up to 150 m thick and extended >26 km up-canyon of the landslide-dam. This sediment has been transported by turbidity currents whose sediment load is trapped by the landslide-dam. Our results suggest canyon-flank collapses can be important controls on canyon morphology as they can generate or contribute to the formation of meander cut-offs, knickpoints and terraces. Flank collapses have the potential to modulate sediment and geochemical fluxes to the deep sea and may impact efficiency of major submarine canyons as transport conduits and locations of organic carbon sequestration. This has potential consequences for deep-sea ecosystems that rely on organic carbon transported through submarine canyons.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000863134400001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272449
作者单位	Durham University; Durham University; NERC National Oceanography Centre; University of Southampton; NERC National Oceanography Centre; University of Southampton; Ifremer; University of Calgary; Centre National de la Recherche Scientifique (CNRS); Ifremer; Universite de Bretagne Occidentale; Technische Universitat Wien; University of Victoria; Newcastle University - UK; University of Hull; Helmholtz Association; GEOMAR Helmholtz Center for Ocean Research Kiel
推荐引用方式 GB/T 7714	Pope, Ed L.,Heijnen, Maarten S.,Talling, Peter J.,et al. Carbon and sediment fluxes inhibited in the submarine Congo Canyon by landslide-damming[J],2022,15(10):13.
APA	Pope, Ed L..,Heijnen, Maarten S..,Talling, Peter J..,Jacinto, Ricardo Silva.,Gaillot, Arnaud.,...&Urlaub, Morelia.(2022).Carbon and sediment fluxes inhibited in the submarine Congo Canyon by landslide-damming.NATURE GEOSCIENCE,15(10),13.
MLA	Pope, Ed L.,et al."Carbon and sediment fluxes inhibited in the submarine Congo Canyon by landslide-damming".NATURE GEOSCIENCE 15.10(2022):13.