Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr
Deformation of the lithosphere under an ice load can be approximated using the hypothesis of local damped isostasy. This simple formulation has been systematically compared with a three-dimensional model of the crust-mantle system for simple ice-load scenarios with a period in the range 20-100 kyr....
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/93183 2024-01-14T10:07:44+01:00 Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr Crucifix, Michel Loutre, Marie-France Berger, Andre Lambeck, Kurt http://hdl.handle.net/1885/93183 https://doi.org/10.1016/S0012-821X(00)00361-7 https://openresearch-repository.anu.edu.au/bitstream/1885/93183/7/01_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93183/9/02_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg unknown Elsevier 0012-821X http://hdl.handle.net/1885/93183 doi:10.1016/S0012-821X(00)00361-7 https://openresearch-repository.anu.edu.au/bitstream/1885/93183/7/01_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93183/9/02_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg Earth and Planetary Science Letters Keywords: climate change glacial rebound isostasy paleoclimate Quaternary Climate Cycles Models Journal article ftanucanberra https://doi.org/10.1016/S0012-821X(00)00361-7 2023-12-15T09:34:23Z Deformation of the lithosphere under an ice load can be approximated using the hypothesis of local damped isostasy. This simple formulation has been systematically compared with a three-dimensional model of the crust-mantle system for simple ice-load scenarios with a period in the range 20-100 kyr. The comparison enables us to introduce the concepts of effective upper mantle density and effective relaxation time into the isostatic model for the response of the Earth to the ice sheets. These parameters depend on the Earth model considered, ice sheet size and the period of the load cycle. The local damped isostasy model has been implemented in the Louvain-la-Neuve climate model to assess the impact of isostasy on continental ice volume variations for the last 200 kyr. Results suggest that isostasy acts as a negative feedback for ice volume during the glaciation process and acts as a positive feedback during the deglaciation. Moreover, taking isostasy into account is necessary to simulate variations in Northern Hemisphere ice volume during isotopic stage 3. Lastly, the use of effective mantle density and effective relaxation time improves the model performance regarding SPECMAP reconstructions. Article in Journal/Newspaper Ice Sheet Australian National University: ANU Digital Collections Earth and Planetary Science Letters 184 3-4 623 633 |
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Open Polar |
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Australian National University: ANU Digital Collections |
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ftanucanberra |
language |
unknown |
topic |
Keywords: climate change glacial rebound isostasy paleoclimate Quaternary Climate Cycles Models |
spellingShingle |
Keywords: climate change glacial rebound isostasy paleoclimate Quaternary Climate Cycles Models Crucifix, Michel Loutre, Marie-France Berger, Andre Lambeck, Kurt Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr |
topic_facet |
Keywords: climate change glacial rebound isostasy paleoclimate Quaternary Climate Cycles Models |
description |
Deformation of the lithosphere under an ice load can be approximated using the hypothesis of local damped isostasy. This simple formulation has been systematically compared with a three-dimensional model of the crust-mantle system for simple ice-load scenarios with a period in the range 20-100 kyr. The comparison enables us to introduce the concepts of effective upper mantle density and effective relaxation time into the isostatic model for the response of the Earth to the ice sheets. These parameters depend on the Earth model considered, ice sheet size and the period of the load cycle. The local damped isostasy model has been implemented in the Louvain-la-Neuve climate model to assess the impact of isostasy on continental ice volume variations for the last 200 kyr. Results suggest that isostasy acts as a negative feedback for ice volume during the glaciation process and acts as a positive feedback during the deglaciation. Moreover, taking isostasy into account is necessary to simulate variations in Northern Hemisphere ice volume during isotopic stage 3. Lastly, the use of effective mantle density and effective relaxation time improves the model performance regarding SPECMAP reconstructions. |
format |
Article in Journal/Newspaper |
author |
Crucifix, Michel Loutre, Marie-France Berger, Andre Lambeck, Kurt |
author_facet |
Crucifix, Michel Loutre, Marie-France Berger, Andre Lambeck, Kurt |
author_sort |
Crucifix, Michel |
title |
Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr |
title_short |
Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr |
title_full |
Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr |
title_fullStr |
Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr |
title_full_unstemmed |
Effect of isostatic rebound on modelled ice volume variations during the last 200 kyr |
title_sort |
effect of isostatic rebound on modelled ice volume variations during the last 200 kyr |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/93183 https://doi.org/10.1016/S0012-821X(00)00361-7 https://openresearch-repository.anu.edu.au/bitstream/1885/93183/7/01_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93183/9/02_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Earth and Planetary Science Letters |
op_relation |
0012-821X http://hdl.handle.net/1885/93183 doi:10.1016/S0012-821X(00)00361-7 https://openresearch-repository.anu.edu.au/bitstream/1885/93183/7/01_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/93183/9/02_Crucifix_Effect_of_isostatic_rebound_on_2001.pdf.jpg |
op_doi |
https://doi.org/10.1016/S0012-821X(00)00361-7 |
container_title |
Earth and Planetary Science Letters |
container_volume |
184 |
container_issue |
3-4 |
container_start_page |
623 |
op_container_end_page |
633 |
_version_ |
1788062126027309056 |