Articles | Volume 21, issue 12
https://doi.org/10.5194/cp-21-2541-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-21-2541-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 Dec 2025
Research article |
| 05 Dec 2025
| 05 Dec 2025
Photic zone niche partitioning, stratification, and carbon cycling in the tropical Indian Ocean during the Piacenzian
School of Earth and Environmental Sciences, Cardiff University, Cardiff, United Kingdom
Department of Earth Sciences, University College London, London, United Kingdom
Ian R. Hall
School of Earth and Environmental Sciences, Cardiff University, Cardiff, United Kingdom
Luc Beaufort
CNRS-CEREGE, BP 80, 13545 Aix-en-Provence CEDEX 04, France
Melissa A. Berke
Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN, USA
Alexandra Nederbragt
School of Earth and Environmental Sciences, Cardiff University, Cardiff, United Kingdom
Paul R. Bown
Department of Earth Sciences, University College London, London, United Kingdom
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Short summary
We investigated sediments from the tropical Indian Ocean to study water column structure and carbon cycling during the mid-Piacenzian Warm Period, about 3 million years ago, when atmospheric carbon dioxide levels were similar to today. Our findings reveal persistent upper ocean stratification and niche separation among plankton groups, which limited nutrient mixing and carbon export to the deep ocean. These results highlight how ocean layering can influence climate feedback in a warmer world.
We investigated sediments from the tropical Indian Ocean to study water column structure and...
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