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Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11

Significant changes in atmospheric CO(2) over glacial-interglacial cycles have mainly been attributed to the Southern Ocean through physical and biological processes. However, little is known about the contribution of global biosphere productivity, associated with important CO(2) fluxes. Here we pre...

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Autores principales: Brandon, Margaux, Landais, Amaelle, Duchamp-Alphonse, Stéphanie, Favre, Violaine, Schmitz, Léa, Abrial, Héloïse, Prié, Frédéric, Extier, Thomas, Blunier, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7192893/
https://www.ncbi.nlm.nih.gov/pubmed/32355168
http://dx.doi.org/10.1038/s41467-020-15739-2
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author Brandon, Margaux
Landais, Amaelle
Duchamp-Alphonse, Stéphanie
Favre, Violaine
Schmitz, Léa
Abrial, Héloïse
Prié, Frédéric
Extier, Thomas
Blunier, Thomas
author_facet Brandon, Margaux
Landais, Amaelle
Duchamp-Alphonse, Stéphanie
Favre, Violaine
Schmitz, Léa
Abrial, Héloïse
Prié, Frédéric
Extier, Thomas
Blunier, Thomas
author_sort Brandon, Margaux
collection PubMed
description Significant changes in atmospheric CO(2) over glacial-interglacial cycles have mainly been attributed to the Southern Ocean through physical and biological processes. However, little is known about the contribution of global biosphere productivity, associated with important CO(2) fluxes. Here we present the first high resolution record of Δ(17)O of O(2) in the Antarctic EPICA Dome C ice core over Termination V and Marine Isotopic Stage (MIS) 11 and reconstruct the global oxygen biosphere productivity over the last 445 ka. Our data show that compared to the younger terminations, biosphere productivity at the end of Termination V is 10 to 30 % higher. Comparisons with local palaeo observations suggest that strong terrestrial productivity in a context of low eccentricity might explain this pattern. We propose that higher biosphere productivity could have maintained low atmospheric CO(2) at the beginning of MIS 11, thus highlighting its control on the global climate during Termination V.
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spelling pubmed-71928932020-05-05 Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11 Brandon, Margaux Landais, Amaelle Duchamp-Alphonse, Stéphanie Favre, Violaine Schmitz, Léa Abrial, Héloïse Prié, Frédéric Extier, Thomas Blunier, Thomas Nat Commun Article Significant changes in atmospheric CO(2) over glacial-interglacial cycles have mainly been attributed to the Southern Ocean through physical and biological processes. However, little is known about the contribution of global biosphere productivity, associated with important CO(2) fluxes. Here we present the first high resolution record of Δ(17)O of O(2) in the Antarctic EPICA Dome C ice core over Termination V and Marine Isotopic Stage (MIS) 11 and reconstruct the global oxygen biosphere productivity over the last 445 ka. Our data show that compared to the younger terminations, biosphere productivity at the end of Termination V is 10 to 30 % higher. Comparisons with local palaeo observations suggest that strong terrestrial productivity in a context of low eccentricity might explain this pattern. We propose that higher biosphere productivity could have maintained low atmospheric CO(2) at the beginning of MIS 11, thus highlighting its control on the global climate during Termination V. Nature Publishing Group UK 2020-04-30 /pmc/articles/PMC7192893/ /pubmed/32355168 http://dx.doi.org/10.1038/s41467-020-15739-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Brandon, Margaux
Landais, Amaelle
Duchamp-Alphonse, Stéphanie
Favre, Violaine
Schmitz, Léa
Abrial, Héloïse
Prié, Frédéric
Extier, Thomas
Blunier, Thomas
Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11
title Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11
title_full Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11
title_fullStr Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11
title_full_unstemmed Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11
title_short Exceptionally high biosphere productivity at the beginning of Marine Isotopic Stage 11
title_sort exceptionally high biosphere productivity at the beginning of marine isotopic stage 11
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7192893/
https://www.ncbi.nlm.nih.gov/pubmed/32355168
http://dx.doi.org/10.1038/s41467-020-15739-2
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