Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years
Sea level and deep-sea temperature variations are key indicators of global climate changes. For continuous records over millions of years, deep-sea carbonate microfossil–based δ(18)O (δ(c)) records are indispensable because they reflect changes in both deep-sea temperature and seawater δ(18)O (δ(w))...
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ftpubmed:oai:pubmedcentral.nih.gov:8232915 2023-05-15T16:40:58+02:00 Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years Rohling, Eelco J. Yu, Jimin Heslop, David Foster, Gavin L. Opdyke, Bradley Roberts, Andrew P. 2021-06-25 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232915/ http://www.ncbi.nlm.nih.gov/pubmed/34172440 https://doi.org/10.1126/sciadv.abf5326 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232915/ http://www.ncbi.nlm.nih.gov/pubmed/34172440 http://dx.doi.org/10.1126/sciadv.abf5326 Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. CC-BY-NC Sci Adv Research Articles Text 2021 ftpubmed https://doi.org/10.1126/sciadv.abf5326 2021-07-11T00:24:03Z Sea level and deep-sea temperature variations are key indicators of global climate changes. For continuous records over millions of years, deep-sea carbonate microfossil–based δ(18)O (δ(c)) records are indispensable because they reflect changes in both deep-sea temperature and seawater δ(18)O (δ(w)); the latter are related to ice volume and, thus, to sea level changes. Deep-sea temperature is usually resolved using elemental ratios in the same benthic microfossil shells used for δ(c), with linear scaling of residual δ(w) to sea level changes. Uncertainties are large and the linear-scaling assumption remains untested. Here, we present a new process-based approach to assess relationships between changes in sea level, mean ice sheet δ(18)O, and both deep-sea δ(w) and temperature and find distinct nonlinearity between sea level and δ(w) changes. Application to δ(c) records over the past 40 million years suggests that Earth’s climate system has complex dynamical behavior, with threshold-like adjustments (critical transitions) that separate quasi-stable deep-sea temperature and ice-volume states. Text Ice Sheet PubMed Central (PMC) Science Advances 7 26 eabf5326 |
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Research Articles |
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Research Articles Rohling, Eelco J. Yu, Jimin Heslop, David Foster, Gavin L. Opdyke, Bradley Roberts, Andrew P. Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years |
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Research Articles |
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Sea level and deep-sea temperature variations are key indicators of global climate changes. For continuous records over millions of years, deep-sea carbonate microfossil–based δ(18)O (δ(c)) records are indispensable because they reflect changes in both deep-sea temperature and seawater δ(18)O (δ(w)); the latter are related to ice volume and, thus, to sea level changes. Deep-sea temperature is usually resolved using elemental ratios in the same benthic microfossil shells used for δ(c), with linear scaling of residual δ(w) to sea level changes. Uncertainties are large and the linear-scaling assumption remains untested. Here, we present a new process-based approach to assess relationships between changes in sea level, mean ice sheet δ(18)O, and both deep-sea δ(w) and temperature and find distinct nonlinearity between sea level and δ(w) changes. Application to δ(c) records over the past 40 million years suggests that Earth’s climate system has complex dynamical behavior, with threshold-like adjustments (critical transitions) that separate quasi-stable deep-sea temperature and ice-volume states. |
format |
Text |
author |
Rohling, Eelco J. Yu, Jimin Heslop, David Foster, Gavin L. Opdyke, Bradley Roberts, Andrew P. |
author_facet |
Rohling, Eelco J. Yu, Jimin Heslop, David Foster, Gavin L. Opdyke, Bradley Roberts, Andrew P. |
author_sort |
Rohling, Eelco J. |
title |
Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years |
title_short |
Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years |
title_full |
Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years |
title_fullStr |
Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years |
title_full_unstemmed |
Sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years |
title_sort |
sea level and deep-sea temperature reconstructions suggest quasi-stable states and critical transitions over the past 40 million years |
publisher |
American Association for the Advancement of Science |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232915/ http://www.ncbi.nlm.nih.gov/pubmed/34172440 https://doi.org/10.1126/sciadv.abf5326 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8232915/ http://www.ncbi.nlm.nih.gov/pubmed/34172440 http://dx.doi.org/10.1126/sciadv.abf5326 |
op_rights |
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
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CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.abf5326 |
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Science Advances |
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