An ice sheet model of reduced complexity for paleoclimate studies
IceBern2D is a vertically integrated ice sheet model to investigate the ice distribution on long timescales under different climatic conditions. It is forced by simulated fields of surface temperature and precipitation of the Last Glacial Maximum and present-day climate from a comprehensive climate...
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ftcopernicus:oai:publications.copernicus.org:esd31338 2023-05-15T16:40:36+02:00 An ice sheet model of reduced complexity for paleoclimate studies Neff, Basil Born, Andreas Stocker, Thomas F. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/esd-7-397-2016 https://esd.copernicus.org/articles/7/397/2016/ eng eng info:eu-repo/grantAgreement/EC/FP7/300544 doi:10.5194/esd-7-397-2016 https://esd.copernicus.org/articles/7/397/2016/ info:eu-repo/semantics/openAccess eISSN: 2190-4987 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/esd-7-397-2016 2020-07-20T16:24:10Z IceBern2D is a vertically integrated ice sheet model to investigate the ice distribution on long timescales under different climatic conditions. It is forced by simulated fields of surface temperature and precipitation of the Last Glacial Maximum and present-day climate from a comprehensive climate model. This constant forcing is adjusted to changes in ice elevation. Due to its reduced complexity and computational efficiency, the model is well suited for extensive sensitivity studies and ensemble simulations on extensive temporal and spatial scales. It shows good quantitative agreement with standardized benchmarks on an artificial domain (EISMINT). Present-day and Last Glacial Maximum ice distributions in the Northern Hemisphere are also simulated with good agreement. Glacial ice volume in Eurasia is underestimated due to the lack of ice shelves in our model. The efficiency of the model is utilized by running an ensemble of 400 simulations with perturbed model parameters and two different estimates of the climate at the Last Glacial Maximum. The sensitivity to the imposed climate boundary conditions and the positive degree-day factor β , i.e., the surface mass balance, outweighs the influence of parameters that disturb the flow of ice. This justifies the use of simplified dynamics as a means to achieve computational efficiency for simulations that cover several glacial cycles. Hysteresis simulations over 5 million years illustrate the stability of the simulated ice sheets to variations in surface air temperature. Other/Unknown Material Ice Sheet Ice Shelves Copernicus Publications: E-Journals Earth System Dynamics 7 2 397 418 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
IceBern2D is a vertically integrated ice sheet model to investigate the ice distribution on long timescales under different climatic conditions. It is forced by simulated fields of surface temperature and precipitation of the Last Glacial Maximum and present-day climate from a comprehensive climate model. This constant forcing is adjusted to changes in ice elevation. Due to its reduced complexity and computational efficiency, the model is well suited for extensive sensitivity studies and ensemble simulations on extensive temporal and spatial scales. It shows good quantitative agreement with standardized benchmarks on an artificial domain (EISMINT). Present-day and Last Glacial Maximum ice distributions in the Northern Hemisphere are also simulated with good agreement. Glacial ice volume in Eurasia is underestimated due to the lack of ice shelves in our model. The efficiency of the model is utilized by running an ensemble of 400 simulations with perturbed model parameters and two different estimates of the climate at the Last Glacial Maximum. The sensitivity to the imposed climate boundary conditions and the positive degree-day factor β , i.e., the surface mass balance, outweighs the influence of parameters that disturb the flow of ice. This justifies the use of simplified dynamics as a means to achieve computational efficiency for simulations that cover several glacial cycles. Hysteresis simulations over 5 million years illustrate the stability of the simulated ice sheets to variations in surface air temperature. |
format |
Other/Unknown Material |
author |
Neff, Basil Born, Andreas Stocker, Thomas F. |
spellingShingle |
Neff, Basil Born, Andreas Stocker, Thomas F. An ice sheet model of reduced complexity for paleoclimate studies |
author_facet |
Neff, Basil Born, Andreas Stocker, Thomas F. |
author_sort |
Neff, Basil |
title |
An ice sheet model of reduced complexity for paleoclimate studies |
title_short |
An ice sheet model of reduced complexity for paleoclimate studies |
title_full |
An ice sheet model of reduced complexity for paleoclimate studies |
title_fullStr |
An ice sheet model of reduced complexity for paleoclimate studies |
title_full_unstemmed |
An ice sheet model of reduced complexity for paleoclimate studies |
title_sort |
ice sheet model of reduced complexity for paleoclimate studies |
publishDate |
2018 |
url |
https://doi.org/10.5194/esd-7-397-2016 https://esd.copernicus.org/articles/7/397/2016/ |
genre |
Ice Sheet Ice Shelves |
genre_facet |
Ice Sheet Ice Shelves |
op_source |
eISSN: 2190-4987 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/300544 doi:10.5194/esd-7-397-2016 https://esd.copernicus.org/articles/7/397/2016/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/esd-7-397-2016 |
container_title |
Earth System Dynamics |
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7 |
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2 |
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397 |
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418 |
_version_ |
1766031007616598016 |