气候变化领域集成服务门户(CCPortal): Palaeocene–Eocene Thermal Maximum prolonged by fossil carbon oxidation

CCPortal

DOI	10.1038/s41561-018-0277-3
	Palaeocene–Eocene Thermal Maximum prolonged by fossil carbon oxidation
	Lyons S.L.; Baczynski A.A.; Babila T.L.; Bralower T.J.; Hajek E.A.; Kump L.R.; Polites E.G.; Self-Trail J.M.; Trampush S.M.; Vornlocher J.R.; Zachos J.C.; Freeman K.H.
发表日期	2019
ISSN	17520894
卷号	12 期号:1
英文摘要	A hallmark of the rapid and massive release of carbon during the Palaeocene–Eocene Thermal Maximum is the global negative carbon isotope excursion. The delayed recovery of the carbon isotope excursion, however, indicates that CO2 inputs continued well after the initial rapid onset, although there is no consensus about the source of this secondary carbon. Here we suggest this secondary input might have derived partly from the oxidation of remobilized sedimentary fossil carbon. We measured the biomarker indicators of thermal maturation in shelf records from the US Mid-Atlantic coast, constructed biomarker mixing models to constrain the amount of fossil carbon in US Mid-Atlantic and Tanzania coastal records, estimated the fossil carbon accumulation rate in coastal sediments and determined the range of global CO2 release from fossil carbon reservoirs. This work provides evidence for an order of magnitude increase in fossil carbon delivery to the oceans that began ~10–20 kyr after the event onset and demonstrates that the oxidation of remobilized fossil carbon released between 102 and 104 PgC as CO2 during the body of the Palaeocene–Eocene Thermal Maximum. The estimated mass is sufficient to have sustained the elevated atmospheric CO2 levels required by the prolonged global carbon isotope excursion. Even after considering uncertainties in the sedimentation rates, these results indicate that the enhanced erosion, mobilization and oxidation of ancient sedimentary carbon contributed to the delayed recovery of the climate system for many thousands of years. © 2018, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
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/124735
作者单位	Department of Geosciences, Pennsylvania State University, University Park, PA, United States; Earth & Planetary Sciences Department, University of California, Santa Cruz, CA, United States; Eastern Geology and Paleoclimate Science Center, US Geological Survey, Reston, VA, United States; Department of Geological Sciences, University of Delaware, Newark, DE, United States; School of Geosciences, University of Louisiana at Lafayette, Lafayette, LA, United States
推荐引用方式 GB/T 7714	Lyons S.L.,Baczynski A.A.,Babila T.L.,等. Palaeocene–Eocene Thermal Maximum prolonged by fossil carbon oxidation[J],2019,12(1).
APA	Lyons S.L..,Baczynski A.A..,Babila T.L..,Bralower T.J..,Hajek E.A..,...&Freeman K.H..(2019).Palaeocene–Eocene Thermal Maximum prolonged by fossil carbon oxidation.Nature Geoscience,12(1).
MLA	Lyons S.L.,et al."Palaeocene–Eocene Thermal Maximum prolonged by fossil carbon oxidation".Nature Geoscience 12.1(2019).