DOI: 10.1073/pnas.2003197117
论文题名: The seawater carbon inventory at the Paleocene-Eocene Thermal Maximum
作者: Haynes L.L. ; Hönisch B.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 39 起始页码: 24088
结束页码: 24095
语种: 英语
英文关键词: Boron proxies
; Dissolved inorganic carbon
; Foraminifera
; Ocean acidification
; Paleocene-Eocene Thermal Maximum
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164020
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Haynes L.L.,Hönisch B.. The seawater carbon inventory at the Paleocene-Eocene Thermal Maximum[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(39)