Articles | Volume 14, issue 11
https://doi.org/10.5194/cp-14-1819-2018
© Author(s) 2018. 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-14-1819-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
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28 Nov 2018
Research article | Highlight paper |
| 28 Nov 2018
| 28 Nov 2018
Carbon burial in deep-sea sediment and implications for oceanic inventories of carbon and alkalinity over the last glacial cycle
Olivier Cartapanis
CORRESPONDING AUTHOR
Earth and Planetary Sciences McGill University, Montreal H3A 2A7, Canada
Institute of Geological Sciences and Oeschger Centre for Climate Change
Research, University of Bern, 3012 Bern, Switzerland
Eric D. Galbraith
Earth and Planetary Sciences McGill University, Montreal H3A 2A7, Canada
Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg.
Lluís Companys 23, 08010 Barcelona, Spain
Institut de Ciència i Tecnologia Ambientals (ICTA) and Department of
Mathematics, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain
Daniele Bianchi
Department of Atmospheric and Oceanic Sciences, University of California
Los Angeles, Los Angeles, CA 90095-1565, USA
Samuel L. Jaccard
Institute of Geological Sciences and Oeschger Centre for Climate Change
Research, University of Bern, 3012 Bern, Switzerland
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Related subject area
Subject: Carbon Cycle | Archive: Marine Archives | Timescale: Pleistocene
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Clim. Past, 17, 603–614, https://doi.org/10.5194/cp-17-603-2021, https://doi.org/10.5194/cp-17-603-2021, 2021
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Productive eastern boundary upwelling systems (EBUs) are characterized by abundant siliceous algae and diatoms, and they play a key role in carbon fixation. Understanding past shifts in diatom production is critical for predicting the impact of future climate change. We combine existing sediment archives from the Benguela EBU with new diatom isotope analyses and modelling to reconstruct late Quaternary silica cycling, which we suggest depends on both upwelling intensity and surface utilization.
Catarina Cavaleiro, Antje H. L. Voelker, Heather Stoll, Karl-Heinz Baumann, and Michal Kucera
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Short summary
A data-based reconstruction of carbon-bearing deep-sea sediment shows significant changes in the global burial rate over the last glacial cycle. We calculate the impact of these deep-sea changes, as well as hypothetical changes in continental shelf burial and volcanic outgassing. Our results imply that these geological fluxes had a significant impact on ocean chemistry and the global carbon isotopic ratio, and that the natural carbon cycle was not in steady state during the Holocene.
A data-based reconstruction of carbon-bearing deep-sea sediment shows significant changes in the...
