GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr
We introduce a newly developed global ice sheet model coupled to the Globally Resolved Energy Balance (GREB) climate model for the simulation of global ice sheet evolution on timescales of 100 kyr or longer (GREB-ISM v1.0). Ice sheets and ice shelves are simulated on a global grid, fully interacting...
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ftdoajarticles:oai:doaj.org/article:7bbab65a030f4968a430c09a995dfabf 2023-05-15T13:48:17+02:00 GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr Z. Xie D. Dommenget F. S. McCormack A. N. Mackintosh 2022-05-01T00:00:00Z https://doi.org/10.5194/gmd-15-3691-2022 https://doaj.org/article/7bbab65a030f4968a430c09a995dfabf EN eng Copernicus Publications https://gmd.copernicus.org/articles/15/3691/2022/gmd-15-3691-2022.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-15-3691-2022 1991-959X 1991-9603 https://doaj.org/article/7bbab65a030f4968a430c09a995dfabf Geoscientific Model Development, Vol 15, Pp 3691-3719 (2022) Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/gmd-15-3691-2022 2022-12-31T02:29:50Z We introduce a newly developed global ice sheet model coupled to the Globally Resolved Energy Balance (GREB) climate model for the simulation of global ice sheet evolution on timescales of 100 kyr or longer (GREB-ISM v1.0). Ice sheets and ice shelves are simulated on a global grid, fully interacting with the climate simulation of surface temperature, precipitation, albedo, land–sea mask, topography and sea level. Thus, it is a fully coupled atmosphere, ocean, land and ice sheet model. We test the model in ice sheet stand-alone and fully coupled simulations. The ice sheet model dynamics behave similarly to other hybrid SIA (shallow ice approximation) and SSA (shallow shelf approximation) models, but the West Antarctic Ice Sheet accumulates too much ice using present-day boundary conditions. The coupled model simulations produce global equilibrium ice sheet volumes and calving rates like those observed for present-day boundary conditions. We designed a series of idealized experiments driven by oscillating solar radiation forcing on periods of 20, 50 and 100 kyr in the Northern Hemisphere. These simulations show clear interactions between the climate system and ice sheets, resulting in slow buildup and fast decay of ice-covered areas and global ice volume. The results also show that Northern Hemisphere ice sheets respond more strongly to timescales longer than 100 kyr . The coupling to the atmosphere and sea level leads to climate interactions between the Northern and Southern Hemispheres. The model can run global simulations of 100 kyr d −1 on a desktop computer, allowing the simulation of the whole Quaternary period (2.6 Myr ) within 1 month. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelves ice covered areas Directory of Open Access Journals: DOAJ Articles Antarctic West Antarctic Ice Sheet Geoscientific Model Development 15 9 3691 3719 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 Z. Xie D. Dommenget F. S. McCormack A. N. Mackintosh GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr |
topic_facet |
Geology QE1-996.5 |
description |
We introduce a newly developed global ice sheet model coupled to the Globally Resolved Energy Balance (GREB) climate model for the simulation of global ice sheet evolution on timescales of 100 kyr or longer (GREB-ISM v1.0). Ice sheets and ice shelves are simulated on a global grid, fully interacting with the climate simulation of surface temperature, precipitation, albedo, land–sea mask, topography and sea level. Thus, it is a fully coupled atmosphere, ocean, land and ice sheet model. We test the model in ice sheet stand-alone and fully coupled simulations. The ice sheet model dynamics behave similarly to other hybrid SIA (shallow ice approximation) and SSA (shallow shelf approximation) models, but the West Antarctic Ice Sheet accumulates too much ice using present-day boundary conditions. The coupled model simulations produce global equilibrium ice sheet volumes and calving rates like those observed for present-day boundary conditions. We designed a series of idealized experiments driven by oscillating solar radiation forcing on periods of 20, 50 and 100 kyr in the Northern Hemisphere. These simulations show clear interactions between the climate system and ice sheets, resulting in slow buildup and fast decay of ice-covered areas and global ice volume. The results also show that Northern Hemisphere ice sheets respond more strongly to timescales longer than 100 kyr . The coupling to the atmosphere and sea level leads to climate interactions between the Northern and Southern Hemispheres. The model can run global simulations of 100 kyr d −1 on a desktop computer, allowing the simulation of the whole Quaternary period (2.6 Myr ) within 1 month. |
format |
Article in Journal/Newspaper |
author |
Z. Xie D. Dommenget F. S. McCormack A. N. Mackintosh |
author_facet |
Z. Xie D. Dommenget F. S. McCormack A. N. Mackintosh |
author_sort |
Z. Xie |
title |
GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr |
title_short |
GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr |
title_full |
GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr |
title_fullStr |
GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr |
title_full_unstemmed |
GREB-ISM v1.0: A coupled ice sheet model for the Globally Resolved Energy Balance model for global simulations on timescales of 100 kyr |
title_sort |
greb-ism v1.0: a coupled ice sheet model for the globally resolved energy balance model for global simulations on timescales of 100 kyr |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/gmd-15-3691-2022 https://doaj.org/article/7bbab65a030f4968a430c09a995dfabf |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet Ice Shelves ice covered areas |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelves ice covered areas |
op_source |
Geoscientific Model Development, Vol 15, Pp 3691-3719 (2022) |
op_relation |
https://gmd.copernicus.org/articles/15/3691/2022/gmd-15-3691-2022.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-15-3691-2022 1991-959X 1991-9603 https://doaj.org/article/7bbab65a030f4968a430c09a995dfabf |
op_doi |
https://doi.org/10.5194/gmd-15-3691-2022 |
container_title |
Geoscientific Model Development |
container_volume |
15 |
container_issue |
9 |
container_start_page |
3691 |
op_container_end_page |
3719 |
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1766249072424910848 |