An ice–climate oscillatory framework for Dansgaard–Oeschger cycles
Intermediate glacial states were characterized by large temperature changes in Greenland and the North Atlantic, referred to as Dansgaard–Oeschger (D–O) variability, with some transitions occurring over a few decades. D–O variability included changes in the strength of the Atlantic meridional overtu...
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ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/unsworks_79034 2024-05-12T08:04:37+00:00 An ice–climate oscillatory framework for Dansgaard–Oeschger cycles Menviel, LC Skinner, LC Tarasov, L Tzedakis, PC 2020-12-01 http://hdl.handle.net/1959.4/unsworks_79034 https://doi.org/10.1038/s43017-020-00106-y unknown Springer Nature http://purl.org/au-research/grants/arc/FT180100606 http://hdl.handle.net/1959.4/unsworks_79034 https://doi.org/10.1038/s43017-020-00106-y metadata only access http://purl.org/coar/access_right/c_14cb CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ urn:ISSN:2662-138X Nature Reviews Earth and Environment, 1, 12, 677-693 13 Climate Action 14 Life Below Water journal article http://purl.org/coar/resource_type/c_6501 2020 ftunswworks https://doi.org/10.1038/s43017-020-00106-y 2024-04-17T15:57:29Z Intermediate glacial states were characterized by large temperature changes in Greenland and the North Atlantic, referred to as Dansgaard–Oeschger (D–O) variability, with some transitions occurring over a few decades. D–O variability included changes in the strength of the Atlantic meridional overturning circulation (AMOC), temperature changes of opposite sign and asynchronous timing in each hemisphere, shifts in the mean position of the Intertropical Convergence Zone and variations in atmospheric CO2. Palaeorecords and numerical studies indicate that the AMOC, with a tight coupling to Nordic Seas sea ice, is central to D–O variability, yet, a complete theory remains elusive. In this Review, we synthesize the climatic expression and processes proposed to explain D–O cyclicity. What emerges is an oscillatory framework of the AMOC–sea-ice system, arising through feedbacks involving the atmosphere, cryosphere and the Earth’s biogeochemical system. Palaeoclimate observations indicate that the AMOC might be more sensitive to perturbations than climate models currently suggest. Tighter constraints on AMOC stability are, thus, needed to project AMOC changes over the coming century as a response to anthropogenic carbon emissions. Progress can be achieved by additional observational constraints and numerical simulations performed with coupled climate–ice-sheet models. Article in Journal/Newspaper Greenland Ice Sheet Nordic Seas North Atlantic Sea ice UNSW Sydney (The University of New South Wales): UNSWorks Greenland Nature Reviews Earth & Environment 1 12 677 693 |
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UNSW Sydney (The University of New South Wales): UNSWorks |
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13 Climate Action 14 Life Below Water |
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13 Climate Action 14 Life Below Water Menviel, LC Skinner, LC Tarasov, L Tzedakis, PC An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |
topic_facet |
13 Climate Action 14 Life Below Water |
description |
Intermediate glacial states were characterized by large temperature changes in Greenland and the North Atlantic, referred to as Dansgaard–Oeschger (D–O) variability, with some transitions occurring over a few decades. D–O variability included changes in the strength of the Atlantic meridional overturning circulation (AMOC), temperature changes of opposite sign and asynchronous timing in each hemisphere, shifts in the mean position of the Intertropical Convergence Zone and variations in atmospheric CO2. Palaeorecords and numerical studies indicate that the AMOC, with a tight coupling to Nordic Seas sea ice, is central to D–O variability, yet, a complete theory remains elusive. In this Review, we synthesize the climatic expression and processes proposed to explain D–O cyclicity. What emerges is an oscillatory framework of the AMOC–sea-ice system, arising through feedbacks involving the atmosphere, cryosphere and the Earth’s biogeochemical system. Palaeoclimate observations indicate that the AMOC might be more sensitive to perturbations than climate models currently suggest. Tighter constraints on AMOC stability are, thus, needed to project AMOC changes over the coming century as a response to anthropogenic carbon emissions. Progress can be achieved by additional observational constraints and numerical simulations performed with coupled climate–ice-sheet models. |
format |
Article in Journal/Newspaper |
author |
Menviel, LC Skinner, LC Tarasov, L Tzedakis, PC |
author_facet |
Menviel, LC Skinner, LC Tarasov, L Tzedakis, PC |
author_sort |
Menviel, LC |
title |
An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |
title_short |
An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |
title_full |
An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |
title_fullStr |
An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |
title_full_unstemmed |
An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |
title_sort |
ice–climate oscillatory framework for dansgaard–oeschger cycles |
publisher |
Springer Nature |
publishDate |
2020 |
url |
http://hdl.handle.net/1959.4/unsworks_79034 https://doi.org/10.1038/s43017-020-00106-y |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Nordic Seas North Atlantic Sea ice |
genre_facet |
Greenland Ice Sheet Nordic Seas North Atlantic Sea ice |
op_source |
urn:ISSN:2662-138X Nature Reviews Earth and Environment, 1, 12, 677-693 |
op_relation |
http://purl.org/au-research/grants/arc/FT180100606 http://hdl.handle.net/1959.4/unsworks_79034 https://doi.org/10.1038/s43017-020-00106-y |
op_rights |
metadata only access http://purl.org/coar/access_right/c_14cb CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1038/s43017-020-00106-y |
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Nature Reviews Earth & Environment |
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1 |
container_issue |
12 |
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677 |
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693 |
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