Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison
Earlier large-scale Greenland ice sheet sea-level projections (e.g., those run during the ice2sea and SeaRISE initiatives) have shown that ice sheet initial conditions have a large effect on the projections and give rise to important uncertainties. The goal of the initMIP-Greenland intercomparison e...
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ftpubmed:oai:pubmedcentral.nih.gov:7365265 2023-05-15T16:25:30+02:00 Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison Goelzer, Heiko Nowicki, Sophie Edwards, Tamsin Beckley, Matthew Abe-Ouchi, Ayako Aschwanden, Andy Calov, Reinhard Gagliardini, Olivier Gillet-Chaulet, Fabien Golledge, Nicholas R. Gregory, Jonathan Greve, Ralf Humbert, Angelika Huybrechts, Philippe Kennedy, Joseph H. Larour, Eric Lipscomb, William H. clećh, Sébastien Le Lee, Victoria Morlighem, Mathieu Pattyn, Frank Payne, Antony J. Rodehacke, Christian Rückamp, Martin Saito, Fuyuki Schlegel, Nicole Seroussi, Helene Shepherd, Andrew Sun, Sainan van de Wal, Roderik Ziemen, Florian A. 2019-04-19 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7365265/ https://doi.org/10.5194/tc-12-1433-2018 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7365265/ http://dx.doi.org/10.5194/tc-12-1433-2018 Cryosphere Article Text 2019 ftpubmed https://doi.org/10.5194/tc-12-1433-2018 2020-07-19T00:51:46Z Earlier large-scale Greenland ice sheet sea-level projections (e.g., those run during the ice2sea and SeaRISE initiatives) have shown that ice sheet initial conditions have a large effect on the projections and give rise to important uncertainties. The goal of the initMIP-Greenland intercomparison exercise is to compare, evaluate and improve the initialisation techniques used in the ice sheet modelling community and to estimate the associated uncertainties in modelled mass changes. initMIP-Greenland is the first in a series of ice sheet model intercomparison activities within ISMIP6 (the Ice Sheet Model Intercomparison Project for CMIP6), which is the primary activity within the Coupled Model Intercomparison Project – phase 6 (CMIP6) focusing on the ice sheets. Two experiments for the large-scale Greenland ice sheet have been designed to allow intercomparison between participating models of 1) the initial present-day state of the ice sheet and 2) the response in two idealised forward experiments. The forward experiments serve to evaluate the initialisation in terms of model drift (forward run without additional forcing) and in response to a large perturbation (prescribed surface mass balance anomaly), and should not be interpreted as sea-level projections. We present and discuss results that highlight the diversity of data sets, boundary conditions and initialisation techniques used in the community to generate initial states of the Greenland ice sheet. We find good agreement across the ensemble for the dynamic response to surface mass balance changes in areas where the simulated ice sheets overlap, but differences arising from the initial size of the ice sheet. The model drift in the control experiment is reduced for models that participated in earlier intercomparison exercises. Text Greenland Ice Sheet PubMed Central (PMC) Greenland The Cryosphere 12 4 1433 1460 |
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PubMed Central (PMC) |
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ftpubmed |
language |
English |
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Article |
spellingShingle |
Article Goelzer, Heiko Nowicki, Sophie Edwards, Tamsin Beckley, Matthew Abe-Ouchi, Ayako Aschwanden, Andy Calov, Reinhard Gagliardini, Olivier Gillet-Chaulet, Fabien Golledge, Nicholas R. Gregory, Jonathan Greve, Ralf Humbert, Angelika Huybrechts, Philippe Kennedy, Joseph H. Larour, Eric Lipscomb, William H. clećh, Sébastien Le Lee, Victoria Morlighem, Mathieu Pattyn, Frank Payne, Antony J. Rodehacke, Christian Rückamp, Martin Saito, Fuyuki Schlegel, Nicole Seroussi, Helene Shepherd, Andrew Sun, Sainan van de Wal, Roderik Ziemen, Florian A. Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison |
topic_facet |
Article |
description |
Earlier large-scale Greenland ice sheet sea-level projections (e.g., those run during the ice2sea and SeaRISE initiatives) have shown that ice sheet initial conditions have a large effect on the projections and give rise to important uncertainties. The goal of the initMIP-Greenland intercomparison exercise is to compare, evaluate and improve the initialisation techniques used in the ice sheet modelling community and to estimate the associated uncertainties in modelled mass changes. initMIP-Greenland is the first in a series of ice sheet model intercomparison activities within ISMIP6 (the Ice Sheet Model Intercomparison Project for CMIP6), which is the primary activity within the Coupled Model Intercomparison Project – phase 6 (CMIP6) focusing on the ice sheets. Two experiments for the large-scale Greenland ice sheet have been designed to allow intercomparison between participating models of 1) the initial present-day state of the ice sheet and 2) the response in two idealised forward experiments. The forward experiments serve to evaluate the initialisation in terms of model drift (forward run without additional forcing) and in response to a large perturbation (prescribed surface mass balance anomaly), and should not be interpreted as sea-level projections. We present and discuss results that highlight the diversity of data sets, boundary conditions and initialisation techniques used in the community to generate initial states of the Greenland ice sheet. We find good agreement across the ensemble for the dynamic response to surface mass balance changes in areas where the simulated ice sheets overlap, but differences arising from the initial size of the ice sheet. The model drift in the control experiment is reduced for models that participated in earlier intercomparison exercises. |
format |
Text |
author |
Goelzer, Heiko Nowicki, Sophie Edwards, Tamsin Beckley, Matthew Abe-Ouchi, Ayako Aschwanden, Andy Calov, Reinhard Gagliardini, Olivier Gillet-Chaulet, Fabien Golledge, Nicholas R. Gregory, Jonathan Greve, Ralf Humbert, Angelika Huybrechts, Philippe Kennedy, Joseph H. Larour, Eric Lipscomb, William H. clećh, Sébastien Le Lee, Victoria Morlighem, Mathieu Pattyn, Frank Payne, Antony J. Rodehacke, Christian Rückamp, Martin Saito, Fuyuki Schlegel, Nicole Seroussi, Helene Shepherd, Andrew Sun, Sainan van de Wal, Roderik Ziemen, Florian A. |
author_facet |
Goelzer, Heiko Nowicki, Sophie Edwards, Tamsin Beckley, Matthew Abe-Ouchi, Ayako Aschwanden, Andy Calov, Reinhard Gagliardini, Olivier Gillet-Chaulet, Fabien Golledge, Nicholas R. Gregory, Jonathan Greve, Ralf Humbert, Angelika Huybrechts, Philippe Kennedy, Joseph H. Larour, Eric Lipscomb, William H. clećh, Sébastien Le Lee, Victoria Morlighem, Mathieu Pattyn, Frank Payne, Antony J. Rodehacke, Christian Rückamp, Martin Saito, Fuyuki Schlegel, Nicole Seroussi, Helene Shepherd, Andrew Sun, Sainan van de Wal, Roderik Ziemen, Florian A. |
author_sort |
Goelzer, Heiko |
title |
Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison |
title_short |
Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison |
title_full |
Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison |
title_fullStr |
Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison |
title_full_unstemmed |
Design and results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison |
title_sort |
design and results of the ice sheet model initialisation experiments initmip-greenland: an ismip6 intercomparison |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7365265/ https://doi.org/10.5194/tc-12-1433-2018 |
geographic |
Greenland |
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Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Cryosphere |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7365265/ http://dx.doi.org/10.5194/tc-12-1433-2018 |
op_doi |
https://doi.org/10.5194/tc-12-1433-2018 |
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The Cryosphere |
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12 |
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4 |
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1433 |
op_container_end_page |
1460 |
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1766014277139824640 |