Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle
International audience Since the original formulation of the positive-degree-day (PDD) method, different PDD calibrations have been proposed in the literature in response to the increasing number of observations. Although these formulations generally provide a satisfactory description of the present...
Published in: | The Cryosphere |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.science/hal-02922666 https://hal.science/hal-02922666/document https://hal.science/hal-02922666/file/tc-7-681-2013.pdf https://doi.org/10.5194/tc-7-681-2013 |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU]Sciences of the Universe [physics] Charbit, S. Dumas, C. Kageyama, M. Roche, Didier M. Ritz, C. Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU]Sciences of the Universe [physics] |
description |
International audience Since the original formulation of the positive-degree-day (PDD) method, different PDD calibrations have been proposed in the literature in response to the increasing number of observations. Although these formulations generally provide a satisfactory description of the present-day Greenland geometry, they have not all been tested for paleo ice sheets. Using the climate-ice sheet model CLIMBER-GRISLI coupled with different PDD models, we evaluate how the parameterisation of the ablation may affect the evolution of Northern Hemisphere ice sheets in the transient simulations of the last glacial cycle. Results from fully coupled simulations are compared to time-slice experiments carried out at different key periods of the last glacial period. We find large differences in the simulated ice sheets according to the chosen PDD model. These differences occur as soon as the onset of glaciation, therefore affecting the subsequent evolution of the ice system. To further investigate how the PDD method controls this evolution, special attention is given to the role of each PDD parameter. We show that glacial inception is critically dependent on the representation of the impact of the temperature variability from the daily to the inter-annual time scale, whose effect is modulated by the refreezing scheme. Finally, an additional set of sensitivity experiments has been carried out to assess the relative importance of melt processes with respect to initial ice sheet configuration in the construction and the evolution of past Northern Hemisphere ice sheets. Our analysis reveals that the impacts of the initial ice sheet condition may range from quite negligible to explaining about half of the LGM ice volume depending on the representation of stochastic temperature variations which remain the main driver of the evolution of the ice system. The main findings of this paper underline the need for conducting studies with high resolution climate models coupled to detailed snow models to better constrain the ... |
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)) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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)-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)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Charbit, S. Dumas, C. Kageyama, M. Roche, Didier M. Ritz, C. |
author_facet |
Charbit, S. Dumas, C. Kageyama, M. Roche, Didier M. Ritz, C. |
author_sort |
Charbit, S. |
title |
Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle |
title_short |
Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle |
title_full |
Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle |
title_fullStr |
Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle |
title_full_unstemmed |
Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle |
title_sort |
influence of ablation-related processes in the build-up of simulated northern hemisphere ice sheets during the last glacial cycle |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-02922666 https://hal.science/hal-02922666/document https://hal.science/hal-02922666/file/tc-7-681-2013.pdf https://doi.org/10.5194/tc-7-681-2013 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-02922666 The Cryosphere, 2013, 7 (2), pp.681-698. ⟨10.5194/tc-7-681-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-7-681-2013 hal-02922666 https://hal.science/hal-02922666 https://hal.science/hal-02922666/document https://hal.science/hal-02922666/file/tc-7-681-2013.pdf doi:10.5194/tc-7-681-2013 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-7-681-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
2 |
container_start_page |
681 |
op_container_end_page |
698 |
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1798846973625761792 |
spelling |
ftuniversailles:oai:HAL:hal-02922666v1 2024-05-12T08:04:44+00:00 Influence of ablation-related processes in the build-up of simulated Northern Hemisphere ice sheets during the last glacial cycle Charbit, S. Dumas, C. Kageyama, M. Roche, Didier M. Ritz, C. 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)) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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)-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)-Centre National de la Recherche Scientifique (CNRS) 2013 https://hal.science/hal-02922666 https://hal.science/hal-02922666/document https://hal.science/hal-02922666/file/tc-7-681-2013.pdf https://doi.org/10.5194/tc-7-681-2013 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-7-681-2013 hal-02922666 https://hal.science/hal-02922666 https://hal.science/hal-02922666/document https://hal.science/hal-02922666/file/tc-7-681-2013.pdf doi:10.5194/tc-7-681-2013 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-02922666 The Cryosphere, 2013, 7 (2), pp.681-698. ⟨10.5194/tc-7-681-2013⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2013 ftuniversailles https://doi.org/10.5194/tc-7-681-2013 2024-04-18T00:27:07Z International audience Since the original formulation of the positive-degree-day (PDD) method, different PDD calibrations have been proposed in the literature in response to the increasing number of observations. Although these formulations generally provide a satisfactory description of the present-day Greenland geometry, they have not all been tested for paleo ice sheets. Using the climate-ice sheet model CLIMBER-GRISLI coupled with different PDD models, we evaluate how the parameterisation of the ablation may affect the evolution of Northern Hemisphere ice sheets in the transient simulations of the last glacial cycle. Results from fully coupled simulations are compared to time-slice experiments carried out at different key periods of the last glacial period. We find large differences in the simulated ice sheets according to the chosen PDD model. These differences occur as soon as the onset of glaciation, therefore affecting the subsequent evolution of the ice system. To further investigate how the PDD method controls this evolution, special attention is given to the role of each PDD parameter. We show that glacial inception is critically dependent on the representation of the impact of the temperature variability from the daily to the inter-annual time scale, whose effect is modulated by the refreezing scheme. Finally, an additional set of sensitivity experiments has been carried out to assess the relative importance of melt processes with respect to initial ice sheet configuration in the construction and the evolution of past Northern Hemisphere ice sheets. Our analysis reveals that the impacts of the initial ice sheet condition may range from quite negligible to explaining about half of the LGM ice volume depending on the representation of stochastic temperature variations which remain the main driver of the evolution of the ice system. The main findings of this paper underline the need for conducting studies with high resolution climate models coupled to detailed snow models to better constrain the ... Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Greenland The Cryosphere 7 2 681 698 |