Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization
In this paper, we propose a new sub-grid scale parameterization for the ice discharge into the ocean through outlet glaciers and inspect the role of different observational and palaeo constraints for the choice of an optimal set of model parameters. This parameterization was introduced into the poly...
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ftleibnizopen:oai:oai.leibnizopen.de:Mh6CMYsBBwLIz6xGkh2X 2023-11-12T04:17:46+01:00 Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization Calov, R. Robinson, A. Perrette, M. Ganopolski, A. 2015 application/pdf https://doi.org/10.34657/1253 https://oa.tib.eu/renate/handle/123456789/685 eng eng München : European Geopyhsical Union CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ The Cryosphere, Volume 9, Issue 1, Page 179-196 Discharge glacial hydrology ice flow ice sheet mass balance melting parameterization sea level change 550 article Text 2015 ftleibnizopen https://doi.org/10.34657/1253 2023-10-15T23:19:16Z In this paper, we propose a new sub-grid scale parameterization for the ice discharge into the ocean through outlet glaciers and inspect the role of different observational and palaeo constraints for the choice of an optimal set of model parameters. This parameterization was introduced into the polythermal ice-sheet model SICOPOLIS, which is coupled to the regional climate model of intermediate complexity REMBO. Using the coupled model, we performed large ensemble simulations over the last two glacial cycles by varying two major parameters: a melt parameter in the surface melt scheme of REMBO and a discharge scaling parameter in our parameterization of ice discharge. Our empirical constraints are the present-day Greenland ice sheet surface elevation, the surface mass balance partition (ratio between total ice discharge and total precipitation) and the Eemian interglacial elevation drop relative to present day in the vicinity of the NEEM ice core. We show that the ice discharge parameterization enables us to simulate both the correct ice-sheet shape and mass balance partition at the same time without explicitly resolving the Greenland outlet glaciers. For model verification, we compare the simulated total and sectoral ice discharge with other estimates. For the model versions that are consistent with the range of observational and palaeo constraints, our simulated Greenland ice sheet contribution to Eemian sea-level rise relative to present-day amounts to 1.4 m on average (in the range of 0.6 and 2.5 m). publishedVersion Article in Journal/Newspaper Greenland ice core Ice Sheet The Cryosphere Unknown Greenland |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
Discharge glacial hydrology ice flow ice sheet mass balance melting parameterization sea level change 550 |
spellingShingle |
Discharge glacial hydrology ice flow ice sheet mass balance melting parameterization sea level change 550 Calov, R. Robinson, A. Perrette, M. Ganopolski, A. Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization |
topic_facet |
Discharge glacial hydrology ice flow ice sheet mass balance melting parameterization sea level change 550 |
description |
In this paper, we propose a new sub-grid scale parameterization for the ice discharge into the ocean through outlet glaciers and inspect the role of different observational and palaeo constraints for the choice of an optimal set of model parameters. This parameterization was introduced into the polythermal ice-sheet model SICOPOLIS, which is coupled to the regional climate model of intermediate complexity REMBO. Using the coupled model, we performed large ensemble simulations over the last two glacial cycles by varying two major parameters: a melt parameter in the surface melt scheme of REMBO and a discharge scaling parameter in our parameterization of ice discharge. Our empirical constraints are the present-day Greenland ice sheet surface elevation, the surface mass balance partition (ratio between total ice discharge and total precipitation) and the Eemian interglacial elevation drop relative to present day in the vicinity of the NEEM ice core. We show that the ice discharge parameterization enables us to simulate both the correct ice-sheet shape and mass balance partition at the same time without explicitly resolving the Greenland outlet glaciers. For model verification, we compare the simulated total and sectoral ice discharge with other estimates. For the model versions that are consistent with the range of observational and palaeo constraints, our simulated Greenland ice sheet contribution to Eemian sea-level rise relative to present-day amounts to 1.4 m on average (in the range of 0.6 and 2.5 m). publishedVersion |
format |
Article in Journal/Newspaper |
author |
Calov, R. Robinson, A. Perrette, M. Ganopolski, A. |
author_facet |
Calov, R. Robinson, A. Perrette, M. Ganopolski, A. |
author_sort |
Calov, R. |
title |
Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization |
title_short |
Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization |
title_full |
Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization |
title_fullStr |
Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization |
title_full_unstemmed |
Simulating the Greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization |
title_sort |
simulating the greenland ice sheet under present-day and palaeo constraints including a new discharge parameterization |
publisher |
München : European Geopyhsical Union |
publishDate |
2015 |
url |
https://doi.org/10.34657/1253 https://oa.tib.eu/renate/handle/123456789/685 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet The Cryosphere |
genre_facet |
Greenland ice core Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Volume 9, Issue 1, Page 179-196 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.34657/1253 |
_version_ |
1782334555885142016 |