High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales
The International Ocean Discovery Programme (IODP) and its predecessors generated a treasure trove of Cenozoic climate and carbon cycle dynamics. Yet, it remains unclear how climate and carbon cycle interacted under changing geologic boundary conditions. Here, we present the carbon isotope (δ(13)C)...
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ftpubmed:oai:pubmedcentral.nih.gov:7538577 2023-05-15T14:57:54+02:00 High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales De Vleeschouwer, David Drury, Anna Joy Vahlenkamp, Maximilian Rochholz, Fiona Liebrand, Diederik Pälike, Heiko 2020-10-06 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7538577/ http://www.ncbi.nlm.nih.gov/pubmed/33024102 https://doi.org/10.1038/s41467-020-18733-w en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7538577/ http://www.ncbi.nlm.nih.gov/pubmed/33024102 http://dx.doi.org/10.1038/s41467-020-18733-w © 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/. CC-BY Nat Commun Article Text 2020 ftpubmed https://doi.org/10.1038/s41467-020-18733-w 2020-10-25T00:21:34Z The International Ocean Discovery Programme (IODP) and its predecessors generated a treasure trove of Cenozoic climate and carbon cycle dynamics. Yet, it remains unclear how climate and carbon cycle interacted under changing geologic boundary conditions. Here, we present the carbon isotope (δ(13)C) megasplice, documenting deep-ocean δ(13)C evolution since 35 million years ago (Ma). We juxtapose the δ(13)C megasplice with its δ(18)O counterpart and determine their phase-difference on ~100-kyr eccentricity timescales. This analysis reveals that 2.4-Myr eccentricity cycles modulate the δ(13)C-δ(18)O phase relationship throughout the Oligo-Miocene (34-6 Ma), potentially through changes in continental weathering. At 6 Ma, a striking switch from in-phase to anti-phase behaviour occurs, signalling a reorganization of the climate-carbon cycle system. We hypothesize that this transition is consistent with Arctic cooling: Prior to 6 Ma, low-latitude continental carbon reservoirs expanded during astronomically-forced cool spells. After 6 Ma, however, continental carbon reservoirs contract rather than expand during cold periods due to competing effects between Arctic biomes (ice, tundra, taiga). We conclude that, on geologic timescales, System Earth experienced state-dependent modes of climate–carbon cycle interaction. Text Arctic taiga Tundra PubMed Central (PMC) Arctic Nature Communications 11 1 |
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Article De Vleeschouwer, David Drury, Anna Joy Vahlenkamp, Maximilian Rochholz, Fiona Liebrand, Diederik Pälike, Heiko High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales |
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Article |
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The International Ocean Discovery Programme (IODP) and its predecessors generated a treasure trove of Cenozoic climate and carbon cycle dynamics. Yet, it remains unclear how climate and carbon cycle interacted under changing geologic boundary conditions. Here, we present the carbon isotope (δ(13)C) megasplice, documenting deep-ocean δ(13)C evolution since 35 million years ago (Ma). We juxtapose the δ(13)C megasplice with its δ(18)O counterpart and determine their phase-difference on ~100-kyr eccentricity timescales. This analysis reveals that 2.4-Myr eccentricity cycles modulate the δ(13)C-δ(18)O phase relationship throughout the Oligo-Miocene (34-6 Ma), potentially through changes in continental weathering. At 6 Ma, a striking switch from in-phase to anti-phase behaviour occurs, signalling a reorganization of the climate-carbon cycle system. We hypothesize that this transition is consistent with Arctic cooling: Prior to 6 Ma, low-latitude continental carbon reservoirs expanded during astronomically-forced cool spells. After 6 Ma, however, continental carbon reservoirs contract rather than expand during cold periods due to competing effects between Arctic biomes (ice, tundra, taiga). We conclude that, on geologic timescales, System Earth experienced state-dependent modes of climate–carbon cycle interaction. |
format |
Text |
author |
De Vleeschouwer, David Drury, Anna Joy Vahlenkamp, Maximilian Rochholz, Fiona Liebrand, Diederik Pälike, Heiko |
author_facet |
De Vleeschouwer, David Drury, Anna Joy Vahlenkamp, Maximilian Rochholz, Fiona Liebrand, Diederik Pälike, Heiko |
author_sort |
De Vleeschouwer, David |
title |
High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales |
title_short |
High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales |
title_full |
High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales |
title_fullStr |
High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales |
title_full_unstemmed |
High-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales |
title_sort |
high-latitude biomes and rock weathering mediate climate–carbon cycle feedbacks on eccentricity timescales |
publisher |
Nature Publishing Group UK |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7538577/ http://www.ncbi.nlm.nih.gov/pubmed/33024102 https://doi.org/10.1038/s41467-020-18733-w |
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Arctic |
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Arctic |
genre |
Arctic taiga Tundra |
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Arctic taiga Tundra |
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Nat Commun |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7538577/ http://www.ncbi.nlm.nih.gov/pubmed/33024102 http://dx.doi.org/10.1038/s41467-020-18733-w |
op_rights |
© 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/. |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41467-020-18733-w |
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Nature Communications |
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11 |
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1 |
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1766329998371717120 |