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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Online Access: | https://doi.org/10.5194/tc-12-1433-2018 |
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ftncar:oai:drupal-site.org:articles_21585 2023-09-05T13:19:44+02:00 Design and results of the ice sheet model initialisation experiments initMIP-Greenland: An ISMIP6 intercomparison Goelzer, Heiko (author) Nowicki, Sophie (author) Edwards, Tamsin (author) Beckley, Matthew (author) Abe-Ouchi, Ayako (author) Aschwanden, Andy (author) Calov, Reinhard (author) Gagliardini, Olivier (author) Gillet-Chaulet, Fabien (author) Golledge, Nicholas R. (author) Gregory, Jonathan (author) Greve, Ralf (author) Humbert, Angelika (author) Huybrechts, Philippe (author) Kennedy, Joseph H. (author) Larour, Eric (author) Lipscomb, William H. (author) Le clec'h, Sébastien (author) Lee, Victoria (author) Morlighem, Mathieu (author) Pattyn, Frank (author) Payne, Antony J. (author) Rodehacke, Christian (author) Rückamp, Martin (author) Saito, Fuyuki (author) Schlegel, Nicole (author) Seroussi, Helene (author) Shepherd, Andrew (author) Sun, Sainan (author) van de Wal, Roderik (author) Ziemen, Florian A. (author) 2018-04-19 https://doi.org/10.5194/tc-12-1433-2018 en eng The Cryosphere--The Cryosphere--1994-0424 Results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison--10.5281/zenodo.1173088 IceBridge BedMachine Greenland, Version 2--10.5067/AD7B0HQNSJ29 MEaSUREs Multi-year Greenland Ice Sheet Velocity Mosaic, Version 1--10.5067/QUA5Q9SVMSJG articles:21585 ark:/85065/d7gh9mpg doi:10.5194/tc-12-1433-2018 Copyright 2018 Author(s). This work is licensed under a Creative Commons Attribution 4.0 license. article Text 2018 ftncar https://doi.org/10.5194/tc-12-1433-2018 2023-08-14T18:48:56Z 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. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Greenland The Cryosphere 12 4 1433 1460 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
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. |
author2 |
Goelzer, Heiko (author) Nowicki, Sophie (author) Edwards, Tamsin (author) Beckley, Matthew (author) Abe-Ouchi, Ayako (author) Aschwanden, Andy (author) Calov, Reinhard (author) Gagliardini, Olivier (author) Gillet-Chaulet, Fabien (author) Golledge, Nicholas R. (author) Gregory, Jonathan (author) Greve, Ralf (author) Humbert, Angelika (author) Huybrechts, Philippe (author) Kennedy, Joseph H. (author) Larour, Eric (author) Lipscomb, William H. (author) Le clec'h, Sébastien (author) Lee, Victoria (author) Morlighem, Mathieu (author) Pattyn, Frank (author) Payne, Antony J. (author) Rodehacke, Christian (author) Rückamp, Martin (author) Saito, Fuyuki (author) Schlegel, Nicole (author) Seroussi, Helene (author) Shepherd, Andrew (author) Sun, Sainan (author) van de Wal, Roderik (author) Ziemen, Florian A. (author) |
format |
Article in Journal/Newspaper |
title |
Design and results of the ice sheet model initialisation experiments initMIP-Greenland: An ISMIP6 intercomparison |
spellingShingle |
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 |
https://doi.org/10.5194/tc-12-1433-2018 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_relation |
The Cryosphere--The Cryosphere--1994-0424 Results of the ice sheet model initialisation experiments initMIP-Greenland: an ISMIP6 intercomparison--10.5281/zenodo.1173088 IceBridge BedMachine Greenland, Version 2--10.5067/AD7B0HQNSJ29 MEaSUREs Multi-year Greenland Ice Sheet Velocity Mosaic, Version 1--10.5067/QUA5Q9SVMSJG articles:21585 ark:/85065/d7gh9mpg doi:10.5194/tc-12-1433-2018 |
op_rights |
Copyright 2018 Author(s). This work is licensed under a Creative Commons Attribution 4.0 license. |
op_doi |
https://doi.org/10.5194/tc-12-1433-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
4 |
container_start_page |
1433 |
op_container_end_page |
1460 |
_version_ |
1776200565579055104 |