Climate of the Past
Climate of the Past
CP
Articles | Volume 19, issue 12
Articles | Volume 19, issue 12
https://doi.org/10.5194/cp-19-2569-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-19-2569-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 12
Research article
 | 
20 Dec 2023
Research article |  | 20 Dec 2023

Warming drove the expansion of marine anoxia in the equatorial Atlantic during the Cenomanian leading up to Oceanic Anoxic Event 2

Mohd Al Farid Abraham, Bernhard David A. Naafs, Vittoria Lauretano, Fotis Sgouridis, and Richard D. Pancost

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Short summary
Oceanic Anoxic Event 2 (OAE 2), about 93.5 million years ago, is characterized by widespread deoxygenated ocean and massive burial of organic-rich sediments. Our results show that the marine deoxygenation at the equatorial Atlantic that predates the OAE 2 interval was driven by global warming and associated with the nutrient status of the site, with factors like temperature-modulated upwelling and hydrology-induced weathering contributing to enhanced nutrient delivery over various timescales. 
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