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://doi.org/10.5194/cp-15-1133-2019 https://cp.copernicus.org/articles/15/1133/2019/ |
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fttriple:oai:gotriple.eu:5xNeWodK-WfNdPf5yTtJw 2023-05-15T13:36:52+02:00 Equilibrium simulations of Marine Isotope Stage 3 climate Guo, Chuncheng Nisancioglu, Kerim H. Bentsen, Mats Bethke, Ingo Zhang, Zhongshi 2019-06-26 https://doi.org/10.5194/cp-15-1133-2019 https://cp.copernicus.org/articles/15/1133/2019/ en eng Copernicus Publications doi:10.5194/cp-15-1133-2019 10670/1.bvl7jm 1814-9324 1814-9332 https://cp.copernicus.org/articles/15/1133/2019/ other undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Other https://vocabularies.coar-repositories.org/resource_types/c_1843/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/cp-15-1133-2019 2023-01-22T17:54:43Z 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. Article in Journal/Newspaper Antarc* Antarctic Arctic Greenland Ice Sheet Nordic Seas Sea ice Southern Ocean Unknown Arctic Antarctic Southern Ocean Greenland Climate of the Past 15 3 1133 1151 |
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geo envir Guo, Chuncheng Nisancioglu, Kerim H. Bentsen, Mats Bethke, Ingo Zhang, Zhongshi Equilibrium simulations of Marine Isotope Stage 3 climate |
topic_facet |
geo envir |
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. |
format |
Article in Journal/Newspaper |
author |
Guo, Chuncheng Nisancioglu, Kerim H. Bentsen, Mats Bethke, Ingo Zhang, Zhongshi |
author_facet |
Guo, Chuncheng Nisancioglu, Kerim H. 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 |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-15-1133-2019 https://cp.copernicus.org/articles/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 |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-15-1133-2019 10670/1.bvl7jm 1814-9324 1814-9332 https://cp.copernicus.org/articles/15/1133/2019/ |
op_rights |
other undefined |
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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1766085181767155712 |