气候变化领域集成服务门户(CCPortal): High rates of organic carbon burial in submarine deltas maintained on geological timescales

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DOI	10.1038/s41561-022-01048-4
	High rates of organic carbon burial in submarine deltas maintained on geological timescales
	Hage, Sophie; Romans, Brian W.; Peploe, Thomas G. E.; Poyatos-More, Miquel; Ardakani, Omid Haeri; Bell, Daniel; Englert, Rebecca G.; Kaempfe-Droguett, Sebastian A.; Nesbit, Paul R.; Sherstan, Georgia; Synnott, Dane P.; Hubbard, Stephen M.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	919
结束页码	+
卷号	15 期号:11 页码:17
英文摘要	Burial of terrestrial organic carbon in marine sediments can draw down atmospheric CO2 levels on Earth over geologic timescales (>= 10(5) yr). The largest sinks of organic carbon burial in present-day oceans lie in deltas, which are composed of three-dimensional sigmoidal sedimentary packages called clinothems, dipping from land to sea. Analysis of modern delta clinothems, however, provides only a snapshot of the temporal and spatial characteristics of these complex systems, making long-term organic carbon burial efficiency difficult to constrain. Here we determine the stratigraphy of an exhumed delta clinothem preserved in Upper Cretaceous (similar to 75 million years ago) deposits in the Magallanes Basin, Chile, using field measurements and aerial photos, which was then combined with measurement of total organic carbon to create a comprehensive organic carbon budget. We show that the clinothem buried 93 +/- 19 Mt terrestrial-rich organic carbon over a duration of 0.1-0.9 Myr. When normalized to the clinothem surface area, this represents an annual burial of 2.3-15.7 t km(-2) yr(-1) organic carbon, which is on the same order of magnitude as modern-day burial rates in clinothems such as the Amazon delta. This study demonstrates that deltas have been and will probably be substantial terrestrial organic carbon sinks over geologic timescales, a long-standing idea that had yet to be quantified.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000871290400001
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/272536
作者单位	University of Calgary; Centre National de la Recherche Scientifique (CNRS); Ifremer; Universite de Bretagne Occidentale; Virginia Polytechnic Institute & State University; Autonomous University of Barcelona; Natural Resources Canada; Lands & Minerals Sector - Natural Resources Canada; Geological Survey of Canada
推荐引用方式 GB/T 7714	Hage, Sophie,Romans, Brian W.,Peploe, Thomas G. E.,et al. High rates of organic carbon burial in submarine deltas maintained on geological timescales[J],2022,15(11):17.
APA	Hage, Sophie.,Romans, Brian W..,Peploe, Thomas G. E..,Poyatos-More, Miquel.,Ardakani, Omid Haeri.,...&Hubbard, Stephen M..(2022).High rates of organic carbon burial in submarine deltas maintained on geological timescales.NATURE GEOSCIENCE,15(11),17.
MLA	Hage, Sophie,et al."High rates of organic carbon burial in submarine deltas maintained on geological timescales".NATURE GEOSCIENCE 15.11(2022):17.