Oxygen rise in the tropical upper ocean during the Paleocene-Eocene Thermal Maximum-Reference-Cited by-同舟云学术

Oxygen rise in the tropical upper ocean during the Paleocene-Eocene Thermal Maximum

Published:2024-02-16 Issue:6684 Volume:383 Page:727-731
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Moretti Simone¹²^ORCID,Auderset Alexandra¹³^ORCID,Deutsch Curtis⁴^ORCID,Schmitz Ronja¹,Gerber Lukas¹^ORCID,Thomas Ellen⁵⁶^ORCID,Luciani Valeria⁷^ORCID,Petrizzo Maria Rose⁸^ORCID,Schiebel Ralf¹,Tripati Aradhna⁹¹⁰¹¹^ORCID,Sexton Philip¹²^ORCID,Norris Richard¹³^ORCID,D’Onofrio Roberta⁷^ORCID,Zachos James¹⁴^ORCID,Sigman Daniel M.⁴^ORCID,Haug Gerald H.¹^ORCID,Martínez-García Alfredo¹^ORCID

Affiliation:

1. Climate Geochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany.

2. Istituto di Scienze Polari, Consiglio Nazionale delle Ricerche, Bologna, Italy.

3. School of Ocean and Earth Science, University of Southampton, Southampton, UK.

4. Department of Geosciences, Princeton University, Princeton, NJ, USA.

5. Department of Earth and Planetary Sciences, Yale University, New Haven, CT, USA.

6. Department of Earth and Environmental Sciences, Wesleyan University, Middletown, CT, USA.

7. Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy.

8. Dipartimento di Scienze della Terra “Ardito Desio,” Università Degli Studi di Milano, Milan, Italy.

9. Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, Los Angeles, CA, USA.

10. Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, USA.

11. Department of Institute of the Environment and Sustainability, University of California, Los Angeles, Los Angeles, CA, USA.

12. School of Environment, Earth and Ecosystem Sciences, The Open University, Milton Keynes, UK.

13. Scripps Institute of Oceanography, University of California, San Diego, La Jolla, CA, USA.

14. Department of Earth and Planetary Sciences, University of California, Santa Cruz, Santa Cruz, CA, USA.

Abstract

The global ocean’s oxygen inventory is declining in response to global warming, but the future of the low-oxygen tropics is uncertain. We report new evidence for tropical oxygenation during the Paleocene-Eocene Thermal Maximum (PETM), a warming event that serves as a geologic analog to anthropogenic warming. Foraminifera-bound nitrogen isotopes indicate that the tropical North Pacific oxygen-deficient zone contracted during the PETM. A concomitant increase in foraminifera size implies that oxygen availability rose in the shallow subsurface throughout the tropical North Pacific. These changes are consistent with ocean model simulations of warming, in which a decline in biological productivity allows tropical subsurface oxygen to rise even as global ocean oxygen declines. The tropical oxygen increase may have helped avoid a mass extinction during the PETM.

Publisher

American Association for the Advancement of Science (AAAS)

Link

https://www.science.org/doi/pdf/10.1126/science.adh4893

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