The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet
In this paper, we present the GRISLI (Grenoble ice sheet and land ice) model in its newest revision (version 2.0). Whilst GRISLI is applicable to any given ice sheet, we focus here on the Antarctic ice sheet because it highlights the importance of grounding line dynamics. Important improvements have...
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ftdoajarticles:oai:doaj.org/article:3c9b252ccc87451299621e7405972baf 2023-05-15T13:47:42+02:00 The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet A. Quiquet C. Dumas C. Ritz V. Peyaud D. M. Roche 2018-12-01T00:00:00Z https://doi.org/10.5194/gmd-11-5003-2018 https://doaj.org/article/3c9b252ccc87451299621e7405972baf EN eng Copernicus Publications https://www.geosci-model-dev.net/11/5003/2018/gmd-11-5003-2018.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-11-5003-2018 1991-959X 1991-9603 https://doaj.org/article/3c9b252ccc87451299621e7405972baf Geoscientific Model Development, Vol 11, Pp 5003-5025 (2018) Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/gmd-11-5003-2018 2022-12-31T06:37:23Z In this paper, we present the GRISLI (Grenoble ice sheet and land ice) model in its newest revision (version 2.0). Whilst GRISLI is applicable to any given ice sheet, we focus here on the Antarctic ice sheet because it highlights the importance of grounding line dynamics. Important improvements have been implemented in the model since its original version (Ritz et al., 2001). Notably, GRISLI now includes a basal hydrology model and an explicit flux computation at the grounding line based on the analytical formulations of Schoof (2007) or Tsai et al. (2015). We perform a full calibration of the model based on an ensemble of 300 simulations sampling mechanical parameter space using a Latin hypercube method. Performance of individual members is assessed relative to the deviation from present-day observed Antarctic ice thickness. To assess the ability of the model to simulate grounding line migration, we also present glacial–interglacial ice sheet changes throughout the last 400 kyr using the best ensemble members taking advantage of the capacity of the model to perform multi-millennial long-term integrations. To achieve this goal, we construct a simple climatic perturbation of present-day climate forcing fields based on two climate proxies: atmospheric and oceanic. The model is able to reproduce expected grounding line advances during glacial periods and subsequent retreats during terminations with reasonable glacial–interglacial ice volume changes. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Geoscientific Model Development 11 12 5003 5025 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 A. Quiquet C. Dumas C. Ritz V. Peyaud D. M. Roche The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet |
topic_facet |
Geology QE1-996.5 |
description |
In this paper, we present the GRISLI (Grenoble ice sheet and land ice) model in its newest revision (version 2.0). Whilst GRISLI is applicable to any given ice sheet, we focus here on the Antarctic ice sheet because it highlights the importance of grounding line dynamics. Important improvements have been implemented in the model since its original version (Ritz et al., 2001). Notably, GRISLI now includes a basal hydrology model and an explicit flux computation at the grounding line based on the analytical formulations of Schoof (2007) or Tsai et al. (2015). We perform a full calibration of the model based on an ensemble of 300 simulations sampling mechanical parameter space using a Latin hypercube method. Performance of individual members is assessed relative to the deviation from present-day observed Antarctic ice thickness. To assess the ability of the model to simulate grounding line migration, we also present glacial–interglacial ice sheet changes throughout the last 400 kyr using the best ensemble members taking advantage of the capacity of the model to perform multi-millennial long-term integrations. To achieve this goal, we construct a simple climatic perturbation of present-day climate forcing fields based on two climate proxies: atmospheric and oceanic. The model is able to reproduce expected grounding line advances during glacial periods and subsequent retreats during terminations with reasonable glacial–interglacial ice volume changes. |
format |
Article in Journal/Newspaper |
author |
A. Quiquet C. Dumas C. Ritz V. Peyaud D. M. Roche |
author_facet |
A. Quiquet C. Dumas C. Ritz V. Peyaud D. M. Roche |
author_sort |
A. Quiquet |
title |
The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet |
title_short |
The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet |
title_full |
The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet |
title_fullStr |
The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet |
title_full_unstemmed |
The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet |
title_sort |
grisli ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the antarctic ice sheet |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/gmd-11-5003-2018 https://doaj.org/article/3c9b252ccc87451299621e7405972baf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Geoscientific Model Development, Vol 11, Pp 5003-5025 (2018) |
op_relation |
https://www.geosci-model-dev.net/11/5003/2018/gmd-11-5003-2018.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-11-5003-2018 1991-959X 1991-9603 https://doaj.org/article/3c9b252ccc87451299621e7405972baf |
op_doi |
https://doi.org/10.5194/gmd-11-5003-2018 |
container_title |
Geoscientific Model Development |
container_volume |
11 |
container_issue |
12 |
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5003 |
op_container_end_page |
5025 |
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