Parameterization for subgrid-scale motion of ice-shelf calving fronts
In order to explore the response of the Greenland ice sheet (GIS) to climate change on long (centennial to multi-millennial) time scales, a regional energy-moisture balance model has been developed. This model simulates seasonal variations of temperature and precipitation over Greenland and explicit...
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fttibhannoverren:oai:oa.tib.eu:123456789/660 2024-09-15T18:09:10+00:00 Parameterization for subgrid-scale motion of ice-shelf calving fronts Albrecht, T. Martin, M. Haseloff, M. Winkelmann, R. Levermann, A. 2011 application/pdf https://oa.tib.eu/renate/handle/123456789/660 https://doi.org/10.34657/1181 eng eng München : European Geopyhsical Union DOI:https://doi.org/10.5194/tc-5-35-2011 https://doi.org/10.34657/1181 https://oa.tib.eu/renate/handle/123456789/660 CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ frei zugänglich ddc:550 boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity status-type:publishedVersion doc-type:Article doc-type:Text 2011 fttibhannoverren https://doi.org/10.34657/118110.5194/tc-5-35-2011 2024-07-03T23:33:53Z In order to explore the response of the Greenland ice sheet (GIS) to climate change on long (centennial to multi-millennial) time scales, a regional energy-moisture balance model has been developed. This model simulates seasonal variations of temperature and precipitation over Greenland and explicitly accounts for elevation and albedo feedbacks. From these fields, the annual mean surface temperature and surface mass balance can be determined and used to force an ice sheet model. The melt component of the surface mass balance is computed here using both a positive degree day approach and a more physically-based alternative that includes insolation and albedo explicitly. As a validation of the climate model, we first simulated temperature and precipitation over Greenland for the prescribed, present-day topography. Our simulated climatology compares well to observations and does not differ significantly from that of a simple parameterization used in many previous simulations. Furthermore, the calculated surface mass balance using both melt schemes falls within the range of recent regional climate model results. For a prescribed, ice-free state, the differences in simulated climatology between the regional energy-moisture balance model and the simple parameterization become significant, with our model showing much stronger summer warming. When coupled to a three-dimensional ice sheet model and initialized with present-day conditions, the two melt schemes both allow realistic simulations of the present-day GIS. Article in Journal/Newspaper Greenland Ice Sheet Ice Shelf Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) |
institution |
Open Polar |
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Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover) |
op_collection_id |
fttibhannoverren |
language |
English |
topic |
ddc:550 boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity |
spellingShingle |
ddc:550 boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity Albrecht, T. Martin, M. Haseloff, M. Winkelmann, R. Levermann, A. Parameterization for subgrid-scale motion of ice-shelf calving fronts |
topic_facet |
ddc:550 boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity |
description |
In order to explore the response of the Greenland ice sheet (GIS) to climate change on long (centennial to multi-millennial) time scales, a regional energy-moisture balance model has been developed. This model simulates seasonal variations of temperature and precipitation over Greenland and explicitly accounts for elevation and albedo feedbacks. From these fields, the annual mean surface temperature and surface mass balance can be determined and used to force an ice sheet model. The melt component of the surface mass balance is computed here using both a positive degree day approach and a more physically-based alternative that includes insolation and albedo explicitly. As a validation of the climate model, we first simulated temperature and precipitation over Greenland for the prescribed, present-day topography. Our simulated climatology compares well to observations and does not differ significantly from that of a simple parameterization used in many previous simulations. Furthermore, the calculated surface mass balance using both melt schemes falls within the range of recent regional climate model results. For a prescribed, ice-free state, the differences in simulated climatology between the regional energy-moisture balance model and the simple parameterization become significant, with our model showing much stronger summer warming. When coupled to a three-dimensional ice sheet model and initialized with present-day conditions, the two melt schemes both allow realistic simulations of the present-day GIS. |
format |
Article in Journal/Newspaper |
author |
Albrecht, T. Martin, M. Haseloff, M. Winkelmann, R. Levermann, A. |
author_facet |
Albrecht, T. Martin, M. Haseloff, M. Winkelmann, R. Levermann, A. |
author_sort |
Albrecht, T. |
title |
Parameterization for subgrid-scale motion of ice-shelf calving fronts |
title_short |
Parameterization for subgrid-scale motion of ice-shelf calving fronts |
title_full |
Parameterization for subgrid-scale motion of ice-shelf calving fronts |
title_fullStr |
Parameterization for subgrid-scale motion of ice-shelf calving fronts |
title_full_unstemmed |
Parameterization for subgrid-scale motion of ice-shelf calving fronts |
title_sort |
parameterization for subgrid-scale motion of ice-shelf calving fronts |
publisher |
München : European Geopyhsical Union |
publishDate |
2011 |
url |
https://oa.tib.eu/renate/handle/123456789/660 https://doi.org/10.34657/1181 |
genre |
Greenland Ice Sheet Ice Shelf |
genre_facet |
Greenland Ice Sheet Ice Shelf |
op_relation |
DOI:https://doi.org/10.5194/tc-5-35-2011 https://doi.org/10.34657/1181 https://oa.tib.eu/renate/handle/123456789/660 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ frei zugänglich |
op_doi |
https://doi.org/10.34657/118110.5194/tc-5-35-2011 |
_version_ |
1810446583737614336 |