Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review]
Dansgaard-Oeschger (D-O) events, millennial-scale climate oscillations between stadial and interstadial conditions (of up to 10–15 °C in amplitude at high northern latitudes), occurred throughout the Marine Isotope Stage 3 (MIS3; 27.8–59.4 ka) period. The climate modelling community up to now has no...
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ftnerc:oai:nora.nerc.ac.uk:533192 2023-05-15T16:00:05+02:00 Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review] Malmierca-Vallet, Irene Sime, Louise C. community members, the D-O 2022-09-06 http://nora.nerc.ac.uk/id/eprint/533192/ https://egusphere.copernicus.org/preprints/2022/egusphere-2022-707/ unknown European Geosciences Union Malmierca-Vallet, Irene orcid:0000-0002-2871-9741 Sime, Louise C. orcid:0000-0002-9093-7926 community members, the D-O. 2022 Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review]. Climate of the Past. https://doi.org/10.5194/egusphere-2022-707 <https://doi.org/10.5194/egusphere-2022-707> Publication - Article PeerReviewed 2022 ftnerc https://doi.org/10.5194/egusphere-2022-707 2023-02-04T19:53:33Z Dansgaard-Oeschger (D-O) events, millennial-scale climate oscillations between stadial and interstadial conditions (of up to 10–15 °C in amplitude at high northern latitudes), occurred throughout the Marine Isotope Stage 3 (MIS3; 27.8–59.4 ka) period. The climate modelling community up to now has not been able to answer the question: Are our climate models too stable to simulate D-O events? To address this, this manuscript lays the ground-work for a MIS3 D-O protocol for general circulation models which are used in the International Panel for Climate Change (IPCC) assessments. We review: D-O terminology, community progress on simulating D-O events in these IPCC-class models (processes and published examples), and evidence about the boundary conditions under which D-O events occur. We find that no model exhibits D-O like behaviour under pre-industrial conditions. Some, but not all, models exhibit D-O like oscillations under MIS3 and/or full glacial conditions. Greenhouse gases and ice-sheet configurations are crucial. However most models have not run simulations of long enough duration to be sure which models show D-O like behaviour, under either MIS3 or full glacial states. We propose a MIS3 baseline protocol at 38 ky (38 to 32 ky) period, which (1) shows a regular sequence of D-O events, and (2) features the intermediate ice-sheet configuration and medium-to-low MIS3 greenhouse gas values which our review suggests are most conducive to D-O like behaviour in models. We also provide a protocol for a second "kicked Heinrich meltwater" experiment, since previous work suggests that this variant may be helpful in preconditioning a state in models which is conducive to D-O events. This review and protocol is intended to provide modelling groups investigating MIS3 D-O oscillations with a common framework. Article in Journal/Newspaper Dansgaard-Oeschger events Ice Sheet Natural Environment Research Council: NERC Open Research Archive |
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Natural Environment Research Council: NERC Open Research Archive |
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description |
Dansgaard-Oeschger (D-O) events, millennial-scale climate oscillations between stadial and interstadial conditions (of up to 10–15 °C in amplitude at high northern latitudes), occurred throughout the Marine Isotope Stage 3 (MIS3; 27.8–59.4 ka) period. The climate modelling community up to now has not been able to answer the question: Are our climate models too stable to simulate D-O events? To address this, this manuscript lays the ground-work for a MIS3 D-O protocol for general circulation models which are used in the International Panel for Climate Change (IPCC) assessments. We review: D-O terminology, community progress on simulating D-O events in these IPCC-class models (processes and published examples), and evidence about the boundary conditions under which D-O events occur. We find that no model exhibits D-O like behaviour under pre-industrial conditions. Some, but not all, models exhibit D-O like oscillations under MIS3 and/or full glacial conditions. Greenhouse gases and ice-sheet configurations are crucial. However most models have not run simulations of long enough duration to be sure which models show D-O like behaviour, under either MIS3 or full glacial states. We propose a MIS3 baseline protocol at 38 ky (38 to 32 ky) period, which (1) shows a regular sequence of D-O events, and (2) features the intermediate ice-sheet configuration and medium-to-low MIS3 greenhouse gas values which our review suggests are most conducive to D-O like behaviour in models. We also provide a protocol for a second "kicked Heinrich meltwater" experiment, since previous work suggests that this variant may be helpful in preconditioning a state in models which is conducive to D-O events. This review and protocol is intended to provide modelling groups investigating MIS3 D-O oscillations with a common framework. |
format |
Article in Journal/Newspaper |
author |
Malmierca-Vallet, Irene Sime, Louise C. community members, the D-O |
spellingShingle |
Malmierca-Vallet, Irene Sime, Louise C. community members, the D-O Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review] |
author_facet |
Malmierca-Vallet, Irene Sime, Louise C. community members, the D-O |
author_sort |
Malmierca-Vallet, Irene |
title |
Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review] |
title_short |
Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review] |
title_full |
Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review] |
title_fullStr |
Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review] |
title_full_unstemmed |
Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review] |
title_sort |
dansgaard-oeschger events in climate models: review and baseline mis3 protocol [in review] |
publisher |
European Geosciences Union |
publishDate |
2022 |
url |
http://nora.nerc.ac.uk/id/eprint/533192/ https://egusphere.copernicus.org/preprints/2022/egusphere-2022-707/ |
genre |
Dansgaard-Oeschger events Ice Sheet |
genre_facet |
Dansgaard-Oeschger events Ice Sheet |
op_relation |
Malmierca-Vallet, Irene orcid:0000-0002-2871-9741 Sime, Louise C. orcid:0000-0002-9093-7926 community members, the D-O. 2022 Dansgaard-Oeschger events in climate models: Review and baseline MIS3 protocol [in review]. Climate of the Past. https://doi.org/10.5194/egusphere-2022-707 <https://doi.org/10.5194/egusphere-2022-707> |
op_doi |
https://doi.org/10.5194/egusphere-2022-707 |
_version_ |
1766395961442041856 |