Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model
International audience The CLIMBER-GREMLINS model is an atmosphere-ocean-vegetation-northern hemisphere ice-sheet model able to simulate ice-sheet growth in response to the transient forcings (insolation and CO2 changes) of the period 126-106kyr BP. In the present version of the model, this growth m...
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HAL CCSD
2007
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Online Access: | https://hal.science/hal-03030440 https://doi.org/10.1016/S1571-0866(07)80063-7 |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Kageyama, Masa Charbit, Sylvie Ritz, Catherine Khodri, Myriam Ramstein, Gilles Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The CLIMBER-GREMLINS model is an atmosphere-ocean-vegetation-northern hemisphere ice-sheet model able to simulate ice-sheet growth in response to the transient forcings (insolation and CO2 changes) of the period 126-106kyr BP. In the present version of the model, this growth mainly occurs over North America and reaches an equivalent of 17 m in sea-level drop. To quantify the role of the vegetation, ocean and icesheet feedbacks in this glaciation of North America, we have conducted sensitivity experiments in which the feedback of each of these components is sequentially switched off. These experiments show that, in this model. (1) glacial inception does not occur when vegetation is fixed to its interglacial state (experiment testing the response of the atmosphere-ocean-boreal land-ice system), (2) glacial inception occurs faster than in the standard experiment when the ocean surface characteristics (surface temperature and sea ice extent) are prescribed to their interglacial seasonal cycle (experiment testing the sensitivity of the atmosphere-vegetation-boreal land-ice system), (3) the ice-sheet albedo and altitude feedbacks are not crucial for starting the glaciation, but the albedo feedback doubles the ice volume growth rate, (4) the potential effect of a reduction in the thermohaline circulation is tested via an additional experiment in which we have forced it to its ‘off’ mode. The results show that this mode favours the fastest land ice growth of all our experiments. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) NOAA Geophysical Fluid Dynamics Laboratory (GFDL) National Oceanic and Atmospheric Administration (NOAA) |
format |
Book Part |
author |
Kageyama, Masa Charbit, Sylvie Ritz, Catherine Khodri, Myriam Ramstein, Gilles |
author_facet |
Kageyama, Masa Charbit, Sylvie Ritz, Catherine Khodri, Myriam Ramstein, Gilles |
author_sort |
Kageyama, Masa |
title |
Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model |
title_short |
Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model |
title_full |
Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model |
title_fullStr |
Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model |
title_full_unstemmed |
Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model |
title_sort |
mechanisms leading to the last glacial inception over north america: results from the climber-gremlins atmosphere-ocean-vegetation northern hemisphere ice-sheet model |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-03030440 https://doi.org/10.1016/S1571-0866(07)80063-7 |
genre |
Ice Sheet Sea ice |
genre_facet |
Ice Sheet Sea ice |
op_source |
The climate of past interglacials, F. Sirocko, M. Claussen, T. Litt and M. F. Sanchez-Goñi (Eds). Developments in Quaternary Science Series. 7, Elsevier https://hal.science/hal-03030440 The climate of past interglacials, F. Sirocko, M. Claussen, T. Litt and M. F. Sanchez-Goñi (Eds). Developments in Quaternary Science Series. 7, Elsevier, 573-582 (chapter 38), 2007, ⟨10.1016/S1571-0866(07)80063-7⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S1571-0866(07)80063-7 hal-03030440 https://hal.science/hal-03030440 doi:10.1016/S1571-0866(07)80063-7 |
op_doi |
https://doi.org/10.1016/S1571-0866(07)80063-7 |
container_start_page |
573 |
op_container_end_page |
582 |
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1797584812098191360 |
spelling |
ftuniversailles:oai:HAL:hal-03030440v1 2024-04-28T08:24:41+00:00 Mechanisms leading to the last glacial inception over North America: Results from the CLIMBER-GREMLINS atmosphere-ocean-vegetation northern hemisphere ice-sheet model Kageyama, Masa Charbit, Sylvie Ritz, Catherine Khodri, Myriam Ramstein, Gilles Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) NOAA Geophysical Fluid Dynamics Laboratory (GFDL) National Oceanic and Atmospheric Administration (NOAA) 2007 https://hal.science/hal-03030440 https://doi.org/10.1016/S1571-0866(07)80063-7 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/S1571-0866(07)80063-7 hal-03030440 https://hal.science/hal-03030440 doi:10.1016/S1571-0866(07)80063-7 The climate of past interglacials, F. Sirocko, M. Claussen, T. Litt and M. F. Sanchez-Goñi (Eds). Developments in Quaternary Science Series. 7, Elsevier https://hal.science/hal-03030440 The climate of past interglacials, F. Sirocko, M. Claussen, T. Litt and M. F. Sanchez-Goñi (Eds). Developments in Quaternary Science Series. 7, Elsevier, 573-582 (chapter 38), 2007, ⟨10.1016/S1571-0866(07)80063-7⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/bookPart Book sections 2007 ftuniversailles https://doi.org/10.1016/S1571-0866(07)80063-7 2024-04-11T00:05:18Z International audience The CLIMBER-GREMLINS model is an atmosphere-ocean-vegetation-northern hemisphere ice-sheet model able to simulate ice-sheet growth in response to the transient forcings (insolation and CO2 changes) of the period 126-106kyr BP. In the present version of the model, this growth mainly occurs over North America and reaches an equivalent of 17 m in sea-level drop. To quantify the role of the vegetation, ocean and icesheet feedbacks in this glaciation of North America, we have conducted sensitivity experiments in which the feedback of each of these components is sequentially switched off. These experiments show that, in this model. (1) glacial inception does not occur when vegetation is fixed to its interglacial state (experiment testing the response of the atmosphere-ocean-boreal land-ice system), (2) glacial inception occurs faster than in the standard experiment when the ocean surface characteristics (surface temperature and sea ice extent) are prescribed to their interglacial seasonal cycle (experiment testing the sensitivity of the atmosphere-vegetation-boreal land-ice system), (3) the ice-sheet albedo and altitude feedbacks are not crucial for starting the glaciation, but the albedo feedback doubles the ice volume growth rate, (4) the potential effect of a reduction in the thermohaline circulation is tested via an additional experiment in which we have forced it to its ‘off’ mode. The results show that this mode favours the fastest land ice growth of all our experiments. Book Part Ice Sheet Sea ice Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ 573 582 |