Equilibrium simulations of Marine Isotope Stage 3 climate
An equilibrium simulation of Marine Isotope Stage 3 (MIS3) climate with boundary conditions characteristic of Greenland Interstadial 8 (GI-8; 38 kyr BP) is carried out with the Norwegian Earth System Model (NorESM). A computationally efficient configuration of the model enables long integrations at...
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Online Access: | https://hdl.handle.net/11250/2648301 https://doi.org/10.5194/cp-15-1133-2019 |
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ftnorce:oai:norceresearch.brage.unit.no:11250/2648301 2024-06-23T07:47:30+00:00 Equilibrium simulations of Marine Isotope Stage 3 climate Guo, Chuncheng Nisancioglu, Kerim Hestnes Bentsen, Mats Bethke, Ingo Zhang, Zhongshi 2019 application/pdf https://hdl.handle.net/11250/2648301 https://doi.org/10.5194/cp-15-1133-2019 eng eng Notur/NorStore: NN4659K EC/FP7/610055 Norges forskningsråd: 246929 Climate of the Past. 2019, 15 (3), 1133-1151. urn:issn:1814-9324 https://hdl.handle.net/11250/2648301 https://doi.org/10.5194/cp-15-1133-2019 cristin:1721578 CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ Climate of the Past 15 3 1133-1151 Peer reviewed Journal article 2019 ftnorce https://doi.org/10.5194/cp-15-1133-2019 2024-05-27T03:02:36Z An equilibrium simulation of Marine Isotope Stage 3 (MIS3) climate with boundary conditions characteristic of Greenland Interstadial 8 (GI-8; 38 kyr BP) is carried out with the Norwegian Earth System Model (NorESM). A computationally efficient configuration of the model enables long integrations at relatively high resolution, with the simulations reaching a quasi-equilibrium state after 2500 years. We assess the characteristics of the simulated large-scale atmosphere and ocean circulation, precipitation, ocean hydrography, sea ice distribution, and internal variability. The simulated MIS3 interstadial near-surface air temperature is 2.9 ∘C cooler than the pre-industrial (PI). The Atlantic meridional overturning circulation (AMOC) is deeper and intensified by ∼13 %. There is a decrease in the volume of Antarctic Bottom Water (AABW) reaching the Atlantic. At the same time, there is an increase in ventilation of the Southern Ocean, associated with a significant expansion of Antarctic sea ice and concomitant intensified brine rejection, invigorating ocean convection. In the central Arctic, sea ice is ∼2 m thicker, with an expansion of sea ice in the Nordic Seas during winter. Attempts at triggering a non-linear transition to a cold stadial climate state, by varying atmospheric CO2 concentrations and Laurentide Ice Sheet height, suggest that the simulated MIS3 interstadial state in the NorESM is relatively stable, thus underscoring the role of model dependency, and questioning the existence of unforced abrupt transitions in Greenland climate in the absence of interactive ice sheet–meltwater dynamics. publishedVersion Article in Journal/Newspaper Antarc* Antarctic Arctic Greenland Ice Sheet Nordic Seas Sea ice Southern Ocean NORCE vitenarkiv (Norwegian Research Centre) Arctic Antarctic Southern Ocean Greenland Climate of the Past 15 3 1133 1151 |
institution |
Open Polar |
collection |
NORCE vitenarkiv (Norwegian Research Centre) |
op_collection_id |
ftnorce |
language |
English |
description |
An equilibrium simulation of Marine Isotope Stage 3 (MIS3) climate with boundary conditions characteristic of Greenland Interstadial 8 (GI-8; 38 kyr BP) is carried out with the Norwegian Earth System Model (NorESM). A computationally efficient configuration of the model enables long integrations at relatively high resolution, with the simulations reaching a quasi-equilibrium state after 2500 years. We assess the characteristics of the simulated large-scale atmosphere and ocean circulation, precipitation, ocean hydrography, sea ice distribution, and internal variability. The simulated MIS3 interstadial near-surface air temperature is 2.9 ∘C cooler than the pre-industrial (PI). The Atlantic meridional overturning circulation (AMOC) is deeper and intensified by ∼13 %. There is a decrease in the volume of Antarctic Bottom Water (AABW) reaching the Atlantic. At the same time, there is an increase in ventilation of the Southern Ocean, associated with a significant expansion of Antarctic sea ice and concomitant intensified brine rejection, invigorating ocean convection. In the central Arctic, sea ice is ∼2 m thicker, with an expansion of sea ice in the Nordic Seas during winter. Attempts at triggering a non-linear transition to a cold stadial climate state, by varying atmospheric CO2 concentrations and Laurentide Ice Sheet height, suggest that the simulated MIS3 interstadial state in the NorESM is relatively stable, thus underscoring the role of model dependency, and questioning the existence of unforced abrupt transitions in Greenland climate in the absence of interactive ice sheet–meltwater dynamics. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Guo, Chuncheng Nisancioglu, Kerim Hestnes Bentsen, Mats Bethke, Ingo Zhang, Zhongshi |
spellingShingle |
Guo, Chuncheng Nisancioglu, Kerim Hestnes Bentsen, Mats Bethke, Ingo Zhang, Zhongshi Equilibrium simulations of Marine Isotope Stage 3 climate |
author_facet |
Guo, Chuncheng Nisancioglu, Kerim Hestnes Bentsen, Mats Bethke, Ingo Zhang, Zhongshi |
author_sort |
Guo, Chuncheng |
title |
Equilibrium simulations of Marine Isotope Stage 3 climate |
title_short |
Equilibrium simulations of Marine Isotope Stage 3 climate |
title_full |
Equilibrium simulations of Marine Isotope Stage 3 climate |
title_fullStr |
Equilibrium simulations of Marine Isotope Stage 3 climate |
title_full_unstemmed |
Equilibrium simulations of Marine Isotope Stage 3 climate |
title_sort |
equilibrium simulations of marine isotope stage 3 climate |
publishDate |
2019 |
url |
https://hdl.handle.net/11250/2648301 https://doi.org/10.5194/cp-15-1133-2019 |
geographic |
Arctic Antarctic Southern Ocean Greenland |
geographic_facet |
Arctic Antarctic Southern Ocean Greenland |
genre |
Antarc* Antarctic Arctic Greenland Ice Sheet Nordic Seas Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Greenland Ice Sheet Nordic Seas Sea ice Southern Ocean |
op_source |
Climate of the Past 15 3 1133-1151 |
op_relation |
Notur/NorStore: NN4659K EC/FP7/610055 Norges forskningsråd: 246929 Climate of the Past. 2019, 15 (3), 1133-1151. urn:issn:1814-9324 https://hdl.handle.net/11250/2648301 https://doi.org/10.5194/cp-15-1133-2019 cristin:1721578 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5194/cp-15-1133-2019 |
container_title |
Climate of the Past |
container_volume |
15 |
container_issue |
3 |
container_start_page |
1133 |
op_container_end_page |
1151 |
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1802651608128946176 |