Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera
Abstract
The Paleocene-Eocene thermal maximum (PETM) was an extraordinary pulse of global warming approximately 56 Ma. This warmingevent is associated with an addition of large amounts of 13C-depleted carbon into the atmosphere-ocean system, but the magnitude of the negative carbon isotope excursion (CIE)signaling the PETMand often used to estimate mass of the released carbonis still debated. Here we gauge the CIE magnitude usingsecondary ion mass spectrometry (SIMS) to perform in situ δ13C measurements within individual larger benthic foraminifera preserved in a tropical shallow marine limestone section in south Tibet. This SIMS-based δ13C record yields a negative CIE (Δ~7‰) comparable in magnitude to that registered by terrestrial records but larger than the ~4‰CIE returned by surface-dwelling planktonic foraminiferain deep-sea records. We therefore posit that the CIE magnitude was~7‰ in the surface ocean, and that theprevious~4‰ estimates for the CIE areattenuated by incomplete preservation and diagenetic overprinting. The large CIE magnitude in the surface ocean (~7‰) and the evidently smaller CIE magnitude registeredby deep-sea benthic foraminifera(~2-3.5‰) arelikely a function of rateand duration of carbon release as well as ocean stratification during the PETM.
- Authors:
-
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Bremen (Germany)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Univ. of Wisconsin, Madison, WI (United States)
- Peking Univ., Beijing (China)
- Univ. of Bremen (Germany); Chinese Academy of Sciences (CAS), Nanjing (China)
- Univ. of Bremen (Germany)
- Publication Date:
- Research Org.:
- Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- OSTI Identifier:
- 1661903
- Alternate Identifier(s):
- OSTI ID: 1579748
- Grant/Contract Number:
- FG02-93ER14389
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Global and Planetary Change
- Additional Journal Information:
- Journal Volume: 184; Journal ID: ISSN 0921-8181
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES
Citation Formats
Zhang, Qinghai, Ding, Lin, Kitajima, Kouki, Valley, John W., Zhang, Bo, Xu, Xiaoxia, Willems, Helmut, and Klügel, Andreas. Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera. United States: N. p., 2019.
Web. doi:10.1016/j.gloplacha.2019.103049.
Zhang, Qinghai, Ding, Lin, Kitajima, Kouki, Valley, John W., Zhang, Bo, Xu, Xiaoxia, Willems, Helmut, & Klügel, Andreas. Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera. United States. https://doi.org/10.1016/j.gloplacha.2019.103049
Zhang, Qinghai, Ding, Lin, Kitajima, Kouki, Valley, John W., Zhang, Bo, Xu, Xiaoxia, Willems, Helmut, and Klügel, Andreas. Thu .
"Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera". United States. https://doi.org/10.1016/j.gloplacha.2019.103049. https://www.osti.gov/servlets/purl/1661903.
@article{osti_1661903,
title = {Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera},
author = {Zhang, Qinghai and Ding, Lin and Kitajima, Kouki and Valley, John W. and Zhang, Bo and Xu, Xiaoxia and Willems, Helmut and Klügel, Andreas},
abstractNote = {The Paleocene-Eocene thermal maximum (PETM) was an extraordinary pulse of global warming approximately 56 Ma. This warmingevent is associated with an addition of large amounts of 13C-depleted carbon into the atmosphere-ocean system, but the magnitude of the negative carbon isotope excursion (CIE)signaling the PETMand often used to estimate mass of the released carbonis still debated. Here we gauge the CIE magnitude usingsecondary ion mass spectrometry (SIMS) to perform in situ δ13C measurements within individual larger benthic foraminifera preserved in a tropical shallow marine limestone section in south Tibet. This SIMS-based δ13C record yields a negative CIE (Δ~7‰) comparable in magnitude to that registered by terrestrial records but larger than the ~4‰CIE returned by surface-dwelling planktonic foraminiferain deep-sea records. We therefore posit that the CIE magnitude was~7‰ in the surface ocean, and that theprevious~4‰ estimates for the CIE areattenuated by incomplete preservation and diagenetic overprinting. The large CIE magnitude in the surface ocean (~7‰) and the evidently smaller CIE magnitude registeredby deep-sea benthic foraminifera(~2-3.5‰) arelikely a function of rateand duration of carbon release as well as ocean stratification during the PETM.},
doi = {10.1016/j.gloplacha.2019.103049},
journal = {Global and Planetary Change},
number = ,
volume = 184,
place = {United States},
year = {Thu Oct 31 00:00:00 EDT 2019},
month = {Thu Oct 31 00:00:00 EDT 2019}
}
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