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...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
München : European Geopyhsical Union
2011
|
Subjects: | |
Online Access: | https://doi.org/10.34657/1181 https://oa.tib.eu/renate/handle/123456789/660 |
id |
ftleibnizopen:oai:oai.leibnizopen.de:gR6CMYsBBwLIz6xGVBVx |
---|---|
record_format |
openpolar |
spelling |
ftleibnizopen:oai:oai.leibnizopen.de:gR6CMYsBBwLIz6xGVBVx 2023-11-12T04:17:48+01:00 Parameterization for subgrid-scale motion of ice-shelf calving fronts Albrecht, T. Martin, M. Haseloff, M. Winkelmann, R. Levermann, A. 2011 application/pdf https://doi.org/10.34657/1181 https://oa.tib.eu/renate/handle/123456789/660 eng eng München : European Geopyhsical Union CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ The Cryosphere, Volume 5, Issue 1, Page 35-44 boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity 550 article Text 2011 ftleibnizopen https://doi.org/10.34657/1181 2023-10-15T23:36:16Z 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. publishedVersion Article in Journal/Newspaper Greenland Ice Sheet Ice Shelf The Cryosphere Unknown Greenland |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity 550 |
spellingShingle |
boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity 550 Albrecht, T. Martin, M. Haseloff, M. Winkelmann, R. Levermann, A. Parameterization for subgrid-scale motion of ice-shelf calving fronts |
topic_facet |
boundary condition finite difference method geometry ice sheet ice shelf mathematical analysis numerical model parameterization resolution velocity 550 |
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. publishedVersion |
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://doi.org/10.34657/1181 https://oa.tib.eu/renate/handle/123456789/660 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Ice Shelf The Cryosphere |
genre_facet |
Greenland Ice Sheet Ice Shelf The Cryosphere |
op_source |
The Cryosphere, Volume 5, Issue 1, Page 35-44 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.34657/1181 |
_version_ |
1782334586254000128 |