气候变化领域集成服务门户(CCPortal): The seawater carbon inventory at the Paleocene-Eocene Thermal Maximum

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DOI	10.1073/pnas.2003197117
	The seawater carbon inventory at the Paleocene-Eocene Thermal Maximum
	Haynes L.L.; Hönisch B.
发表日期	2020
ISSN	0027-8424
起始页码	24088
结束页码	24095
卷号	117 期号:39
英文摘要	The Paleocene-Eocene Thermal Maximum (PETM) (55.6 Mya) was a geologically rapid carbon-release event that is considered the closest natural analog to anthropogenic CO2 emissions. Recent work has used boron-based proxies in planktic foraminifera to characterize the extent of surface-ocean acidification that occurred during the event. However, seawater acidity alone provides an incomplete constraint on the nature and source of carbon release. Here, we apply previously undescribed culture calibrations for the B/Ca proxy in planktic foraminifera and use them to calculate relative changes in seawater-dissolved inorganic carbon (DIC) concentration, surmising that Pacific surface-ocean DIC increased by +1, 010+ 1,415-646 μmol/kg during the peak-PETM. Making reasonable assumptions for the pre-PETM oceanic DIC inventory, we provide a fully data-driven estimate of the PETM carbon source. Our reconstruction yields a mean source carbon δ13C of −10% and a mean increase in the oceanic C inventory of +14,900 petagrams of carbon (PgC), pointing to volcanic CO2 emissions as the main carbon source responsible for PETM warming. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Boron proxies; Dissolved inorganic carbon; Foraminifera; Ocean acidification; Paleocene-Eocene Thermal Maximum
语种	英语
scopus关键词	boron; organic carbon; organic matter; sea water; Acarinina soldadoensis; acidification; alkalinity; Article; carbon footprint; carbon source; climate warming; concentration (parameter); controlled study; dissolution; Eocene; foraminifer; measurement error; Monte Carlo method; Morozovella velascoensis; nonhuman; Orbulina universa; Paleocene; pH; priority journal; Trilobatus sacculifer; weathering
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160788
作者单位	Haynes, L.L., Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, United States, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States; Hönisch, B., Department of Earth and Environmental Sciences, Columbia University, New York, NY 10027, United States, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States
推荐引用方式 GB/T 7714	Haynes L.L.,Hönisch B.. The seawater carbon inventory at the Paleocene-Eocene Thermal Maximum[J],2020,117(39).
APA	Haynes L.L.,&Hönisch B..(2020).The seawater carbon inventory at the Paleocene-Eocene Thermal Maximum.Proceedings of the National Academy of Sciences of the United States of America,117(39).
MLA	Haynes L.L.,et al."The seawater carbon inventory at the Paleocene-Eocene Thermal Maximum".Proceedings of the National Academy of Sciences of the United States of America 117.39(2020).