Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model
International audience We examine several aspects of the ocean-atmosphere system over the last 30 000 years, by carrying out simulations with prescribed ice-sheets, atmospheric CO 2 concentration, and orbital parameters. We use the GENIE-1 model with a geostrophic ocean, dynamic sea-ice, an energy b...
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ftinsu:oai:HAL:hal-00298130v1 2023-11-12T04:18:37+01:00 Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model Lunt, D. J. Williamson, M. S. Valdes, P. J. Lenton, T. M. Bristol Research Initiative for the Dynamic Global Environment (BRIDGE) School of Geographical Sciences Bristol University of Bristol Bristol -University of Bristol Bristol School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) Tyndall Centre for Climate Change Research Current affiliation: Quantum Information Group 2006-06-14 https://hal.science/hal-00298130 https://hal.science/hal-00298130/document https://hal.science/hal-00298130/file/cpd-2-267-2006.pdf en eng HAL CCSD European Geosciences Union (EGU) hal-00298130 https://hal.science/hal-00298130 https://hal.science/hal-00298130/document https://hal.science/hal-00298130/file/cpd-2-267-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-00298130 Climate of the Past Discussions, 2006, 2 (3), pp.267-283 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2006 ftinsu 2023-10-25T16:28:11Z International audience We examine several aspects of the ocean-atmosphere system over the last 30 000 years, by carrying out simulations with prescribed ice-sheets, atmospheric CO 2 concentration, and orbital parameters. We use the GENIE-1 model with a geostrophic ocean, dynamic sea-ice, an energy balance atmosphere, and a land-surface scheme with fixed vegetation. A transient simulation, with boundary conditions derived from ice-core records and ice-sheet reconstructions, is compared with equilibrium snapshot simulations, including the Last Glacial Maximum (21 000 years before present; 21 kyrBP), mid-Holocene (6 kyrBP) and pre-industrial. The equilibrium snapshot surface temperatures are all very similar to their corresponding time period in the transient simulation, suggesting that in the last 30 000 years, the ocean-atmosphere system has been close to equilibrium with its boundary conditions. We investigate the method of accelerating the boundary conditions of a transient simulation and find that the Southern Ocean is the region most affected by the acceleration. The Northern Hemisphere, even with a factor of 10 acceleration, is relatively unaffected. Article in Journal/Newspaper ice core Ice Sheet Sea ice Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Southern Ocean |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Lunt, D. J. Williamson, M. S. Valdes, P. J. Lenton, T. M. Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience We examine several aspects of the ocean-atmosphere system over the last 30 000 years, by carrying out simulations with prescribed ice-sheets, atmospheric CO 2 concentration, and orbital parameters. We use the GENIE-1 model with a geostrophic ocean, dynamic sea-ice, an energy balance atmosphere, and a land-surface scheme with fixed vegetation. A transient simulation, with boundary conditions derived from ice-core records and ice-sheet reconstructions, is compared with equilibrium snapshot simulations, including the Last Glacial Maximum (21 000 years before present; 21 kyrBP), mid-Holocene (6 kyrBP) and pre-industrial. The equilibrium snapshot surface temperatures are all very similar to their corresponding time period in the transient simulation, suggesting that in the last 30 000 years, the ocean-atmosphere system has been close to equilibrium with its boundary conditions. We investigate the method of accelerating the boundary conditions of a transient simulation and find that the Southern Ocean is the region most affected by the acceleration. The Northern Hemisphere, even with a factor of 10 acceleration, is relatively unaffected. |
author2 |
Bristol Research Initiative for the Dynamic Global Environment (BRIDGE) School of Geographical Sciences Bristol University of Bristol Bristol -University of Bristol Bristol School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) Tyndall Centre for Climate Change Research Current affiliation: Quantum Information Group |
format |
Article in Journal/Newspaper |
author |
Lunt, D. J. Williamson, M. S. Valdes, P. J. Lenton, T. M. |
author_facet |
Lunt, D. J. Williamson, M. S. Valdes, P. J. Lenton, T. M. |
author_sort |
Lunt, D. J. |
title |
Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model |
title_short |
Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model |
title_full |
Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model |
title_fullStr |
Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model |
title_full_unstemmed |
Comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the GENIE-1 model |
title_sort |
comparing transient, accelerated, and equilibrium simulations of the last 30 000 years with the genie-1 model |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00298130 https://hal.science/hal-00298130/document https://hal.science/hal-00298130/file/cpd-2-267-2006.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
ice core Ice Sheet Sea ice Southern Ocean |
genre_facet |
ice core Ice Sheet Sea ice Southern Ocean |
op_source |
ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-00298130 Climate of the Past Discussions, 2006, 2 (3), pp.267-283 |
op_relation |
hal-00298130 https://hal.science/hal-00298130 https://hal.science/hal-00298130/document https://hal.science/hal-00298130/file/cpd-2-267-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782335220248215552 |