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 this initMIP-Greenland intercomparison e...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20180004343 2023-05-15T16:25:30+02:00 Design and Results of the Ice Sheet Model Initialisation Experiments InitMIP-Greenland: An ISMIP6 Intercomparison Abe-Ouchi, Ayako Rodehacke, Christian van de Wal, Roderik Lee, Victoria Pattyn, Frank Le clec´h, Sebastien Sun, Sainan Humbert, Angelika Golledge, Nicholas R. Greve, Ralf Seroussi, Helene Gregory, Jonathan Edwards, Tamsin Morlighem, Mathieu Goelzer, Heiko Rückamp, Martin Gillet-Chaulet, Fabien Kennedy, Joseph H. Huybrechts, Philippe Payne, Antony J. Aschwanden, Andy Gagliardini, Olivier Calov, Reinhard Saito, Fuyuki Nowicki, Sophie Shepherd, Andrew Schlegel, Nicole Beckley, Matthew Larour, Eric Ziemen, Florian A. Lipscomb, William H. Unclassified, Unlimited, Publicly available April 19, 2018 application/pdf http://hdl.handle.net/2060/20180004343 unknown Document ID: 20180004343 http://hdl.handle.net/2060/20180004343 Copyright, Use by or on behalf of the U.S. Government permitted CASI Geophysics GSFC-E-DAA-TN56106 The Cryosphere (e-ISSN 1994-0424); 12; 4; 1433-1460 2018 ftnasantrs 2019-11-23T23:47:23Z 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 this 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); they 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. Other/Unknown Material Greenland Ice Sheet NASA Technical Reports Server (NTRS) Greenland |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Geophysics |
spellingShingle |
Geophysics Abe-Ouchi, Ayako Rodehacke, Christian van de Wal, Roderik Lee, Victoria Pattyn, Frank Le clec´h, Sebastien Sun, Sainan Humbert, Angelika Golledge, Nicholas R. Greve, Ralf Seroussi, Helene Gregory, Jonathan Edwards, Tamsin Morlighem, Mathieu Goelzer, Heiko Rückamp, Martin Gillet-Chaulet, Fabien Kennedy, Joseph H. Huybrechts, Philippe Payne, Antony J. Aschwanden, Andy Gagliardini, Olivier Calov, Reinhard Saito, Fuyuki Nowicki, Sophie Shepherd, Andrew Schlegel, Nicole Beckley, Matthew Larour, Eric Ziemen, Florian A. Lipscomb, William H. Design and Results of the Ice Sheet Model Initialisation Experiments InitMIP-Greenland: An ISMIP6 Intercomparison |
topic_facet |
Geophysics |
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 this 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); they 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 |
Other/Unknown Material |
author |
Abe-Ouchi, Ayako Rodehacke, Christian van de Wal, Roderik Lee, Victoria Pattyn, Frank Le clec´h, Sebastien Sun, Sainan Humbert, Angelika Golledge, Nicholas R. Greve, Ralf Seroussi, Helene Gregory, Jonathan Edwards, Tamsin Morlighem, Mathieu Goelzer, Heiko Rückamp, Martin Gillet-Chaulet, Fabien Kennedy, Joseph H. Huybrechts, Philippe Payne, Antony J. Aschwanden, Andy Gagliardini, Olivier Calov, Reinhard Saito, Fuyuki Nowicki, Sophie Shepherd, Andrew Schlegel, Nicole Beckley, Matthew Larour, Eric Ziemen, Florian A. Lipscomb, William H. |
author_facet |
Abe-Ouchi, Ayako Rodehacke, Christian van de Wal, Roderik Lee, Victoria Pattyn, Frank Le clec´h, Sebastien Sun, Sainan Humbert, Angelika Golledge, Nicholas R. Greve, Ralf Seroussi, Helene Gregory, Jonathan Edwards, Tamsin Morlighem, Mathieu Goelzer, Heiko Rückamp, Martin Gillet-Chaulet, Fabien Kennedy, Joseph H. Huybrechts, Philippe Payne, Antony J. Aschwanden, Andy Gagliardini, Olivier Calov, Reinhard Saito, Fuyuki Nowicki, Sophie Shepherd, Andrew Schlegel, Nicole Beckley, Matthew Larour, Eric Ziemen, Florian A. Lipscomb, William H. |
author_sort |
Abe-Ouchi, Ayako |
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 |
2018 |
url |
http://hdl.handle.net/2060/20180004343 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
CASI |
op_relation |
Document ID: 20180004343 http://hdl.handle.net/2060/20180004343 |
op_rights |
Copyright, Use by or on behalf of the U.S. Government permitted |
_version_ |
1766014273834713088 |