Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol
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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Copernicus Publications on behalf of the European Geosciences Union
2023
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Online Access: | https://centaur.reading.ac.uk/114110/ https://centaur.reading.ac.uk/114110/1/Dansgaard-oeschger%20events%20in%20climate%20models.pdf |
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ftunivreading:oai:centaur.reading.ac.uk:114110 2024-09-15T18:03:30+00:00 Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol Malmierca-Vallet, Irene Sime, Louise C. Harrison, Sandy P. D–O community members, . 2023-05-08 text https://centaur.reading.ac.uk/114110/ https://centaur.reading.ac.uk/114110/1/Dansgaard-oeschger%20events%20in%20climate%20models.pdf en eng Copernicus Publications on behalf of the European Geosciences Union https://centaur.reading.ac.uk/114110/1/Dansgaard-oeschger%20events%20in%20climate%20models.pdf Malmierca-Vallet, I. orcid:0000-0002-2871-9741 , Sime, L. C. orcid:0000-0002-9093-7926 , Harrison, S. P. <https://centaur.reading.ac.uk/view/creators/90004853.html> orcid:0000-0001-5687-1903 and D–O community members, . (2023) Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol. Climate of the Past, 19 (5). pp. 915-942. ISSN 1814-9324 doi: https://doi.org/10.5194/cp-19-915-2023 <https://doi.org/10.5194/cp-19-915-2023> cc_by_4 Article PeerReviewed 2023 ftunivreading https://doi.org/10.5194/cp-19-915-2023 2024-07-30T14:08:26Z 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 of whether our climate models are too stable to simulate D–O events. To address this, this paper 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 the following: 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 34 ka, which features low obliquity values, medium to low MIS3 greenhouse gas values, and the intermediate ice sheet configuration, which our review suggests are most conducive to D–O-like behaviour in models. We also provide a protocol for a second freshwater (Heinrich-event-preconditioned) 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 provides modelling groups investigating MIS3 D–O oscillations with a common framework, which is aimed at (1) maximising the chance of the occurrence of D–O-like events in the simulations, (2) allowing more precise model–data evaluation, and (3) providing an adequate central point for modellers to explore model stability. Article in Journal/Newspaper Dansgaard-Oeschger events Ice Sheet CentAUR: Central Archive at the University of Reading Climate of the Past 19 5 915 942 |
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Open Polar |
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CentAUR: Central Archive at the University of Reading |
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ftunivreading |
language |
English |
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 of whether our climate models are too stable to simulate D–O events. To address this, this paper 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 the following: 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 34 ka, which features low obliquity values, medium to low MIS3 greenhouse gas values, and the intermediate ice sheet configuration, which our review suggests are most conducive to D–O-like behaviour in models. We also provide a protocol for a second freshwater (Heinrich-event-preconditioned) 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 provides modelling groups investigating MIS3 D–O oscillations with a common framework, which is aimed at (1) maximising the chance of the occurrence of D–O-like events in the simulations, (2) allowing more precise model–data evaluation, and (3) providing an adequate central point for modellers to explore model stability. |
format |
Article in Journal/Newspaper |
author |
Malmierca-Vallet, Irene Sime, Louise C. Harrison, Sandy P. D–O community members, . |
spellingShingle |
Malmierca-Vallet, Irene Sime, Louise C. Harrison, Sandy P. D–O community members, . Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol |
author_facet |
Malmierca-Vallet, Irene Sime, Louise C. Harrison, Sandy P. D–O community members, . |
author_sort |
Malmierca-Vallet, Irene |
title |
Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol |
title_short |
Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol |
title_full |
Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol |
title_fullStr |
Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol |
title_full_unstemmed |
Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol |
title_sort |
dansgaard–oeschger events in climate models: review and baseline marine isotope stage 3 (mis3) protocol |
publisher |
Copernicus Publications on behalf of the European Geosciences Union |
publishDate |
2023 |
url |
https://centaur.reading.ac.uk/114110/ https://centaur.reading.ac.uk/114110/1/Dansgaard-oeschger%20events%20in%20climate%20models.pdf |
genre |
Dansgaard-Oeschger events Ice Sheet |
genre_facet |
Dansgaard-Oeschger events Ice Sheet |
op_relation |
https://centaur.reading.ac.uk/114110/1/Dansgaard-oeschger%20events%20in%20climate%20models.pdf Malmierca-Vallet, I. orcid:0000-0002-2871-9741 , Sime, L. C. orcid:0000-0002-9093-7926 , Harrison, S. P. <https://centaur.reading.ac.uk/view/creators/90004853.html> orcid:0000-0001-5687-1903 and D–O community members, . (2023) Dansgaard–Oeschger events in climate models: review and baseline Marine Isotope Stage 3 (MIS3) protocol. Climate of the Past, 19 (5). pp. 915-942. ISSN 1814-9324 doi: https://doi.org/10.5194/cp-19-915-2023 <https://doi.org/10.5194/cp-19-915-2023> |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.5194/cp-19-915-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
5 |
container_start_page |
915 |
op_container_end_page |
942 |
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1810440985093603328 |