Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model
The Glimmer Community Ice Sheet Model (Glimmer-CISM) has been implemented in the Community Earth System Model (CESM). Glimmer-CISM is forced by a surface mass balance (SMB) computed in multiple elevation classes in the CESM land model and downscaled to the ice sheet grid. Ice sheet evolution is gove...
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ftncar:oai:drupal-site.org:articles_12966 2023-09-05T13:17:38+02:00 Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model Lipscomb, W. (author) Fyke, J. (author) Vizcaíno, M. (author) Sacks, W. (author) Wolfe, Jonathan (author) Vertenstein, Mariana (author) Craig, Anthony (author) Kluzek, Erik (author) Lawrence, David (author) 2013-10-01 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-829 https://doi.org/10.1175/JCLI-D-12-00557.1 en eng Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-829 doi:10.1175/JCLI-D-12-00557.1 ark:/85065/d7dj5ghs Copyright 2013 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Arctic Ice sheets Climate models Coupled models Text article 2013 ftncar https://doi.org/10.1175/JCLI-D-12-00557.1 2023-08-14T18:37:26Z The Glimmer Community Ice Sheet Model (Glimmer-CISM) has been implemented in the Community Earth System Model (CESM). Glimmer-CISM is forced by a surface mass balance (SMB) computed in multiple elevation classes in the CESM land model and downscaled to the ice sheet grid. Ice sheet evolution is governed by the shallow-ice approximation with thermomechanical coupling and basal sliding. This paper describes and evaluates the initial model implementation for the Greenland Ice Sheet (GIS). The ice sheet model was spun up using the SMB from a coupled CESM simulation with preindustrial forcing. The model's sensitivity to three key ice sheet parameters was explored by running an ensemble of 100 GIS simulations to quasi equilibrium and ranking each simulation based on multiple diagnostics. With reasonable parameter choices, the steady-state GIS geometry is broadly consistent with observations. The simulated ice sheet is too thick and extensive, however, in some marginal regions where the SMB is anomalously positive. The top-ranking simulations were continued using surface forcing from CESM simulations of the twentieth century (1850-2005) and twenty-first century (2005-2100, with RCP8.5 forcing). In these simulations the GIS loses mass, with a resulting global-mean sea level rise of 16 mm during 1850–2005 and 60 mm during 2005-2100. This mass loss is caused mainly by increased ablation near the ice sheet margin, offset by reduced ice discharge to the ocean. Projected sea level rise is sensitive to the initial geometry, showing the importance of realistic geometry in the spun-up ice sheet. Article in Journal/Newspaper Arctic Greenland Ice Sheet OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Greenland Journal of Climate 26 19 7352 7371 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Arctic Ice sheets Climate models Coupled models |
spellingShingle |
Arctic Ice sheets Climate models Coupled models Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model |
topic_facet |
Arctic Ice sheets Climate models Coupled models |
description |
The Glimmer Community Ice Sheet Model (Glimmer-CISM) has been implemented in the Community Earth System Model (CESM). Glimmer-CISM is forced by a surface mass balance (SMB) computed in multiple elevation classes in the CESM land model and downscaled to the ice sheet grid. Ice sheet evolution is governed by the shallow-ice approximation with thermomechanical coupling and basal sliding. This paper describes and evaluates the initial model implementation for the Greenland Ice Sheet (GIS). The ice sheet model was spun up using the SMB from a coupled CESM simulation with preindustrial forcing. The model's sensitivity to three key ice sheet parameters was explored by running an ensemble of 100 GIS simulations to quasi equilibrium and ranking each simulation based on multiple diagnostics. With reasonable parameter choices, the steady-state GIS geometry is broadly consistent with observations. The simulated ice sheet is too thick and extensive, however, in some marginal regions where the SMB is anomalously positive. The top-ranking simulations were continued using surface forcing from CESM simulations of the twentieth century (1850-2005) and twenty-first century (2005-2100, with RCP8.5 forcing). In these simulations the GIS loses mass, with a resulting global-mean sea level rise of 16 mm during 1850–2005 and 60 mm during 2005-2100. This mass loss is caused mainly by increased ablation near the ice sheet margin, offset by reduced ice discharge to the ocean. Projected sea level rise is sensitive to the initial geometry, showing the importance of realistic geometry in the spun-up ice sheet. |
author2 |
Lipscomb, W. (author) Fyke, J. (author) Vizcaíno, M. (author) Sacks, W. (author) Wolfe, Jonathan (author) Vertenstein, Mariana (author) Craig, Anthony (author) Kluzek, Erik (author) Lawrence, David (author) |
format |
Article in Journal/Newspaper |
title |
Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model |
title_short |
Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model |
title_full |
Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model |
title_fullStr |
Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model |
title_full_unstemmed |
Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model |
title_sort |
implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model |
publishDate |
2013 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-829 https://doi.org/10.1175/JCLI-D-12-00557.1 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet |
genre_facet |
Arctic Greenland Ice Sheet |
op_relation |
Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-019-829 doi:10.1175/JCLI-D-12-00557.1 ark:/85065/d7dj5ghs |
op_rights |
Copyright 2013 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/JCLI-D-12-00557.1 |
container_title |
Journal of Climate |
container_volume |
26 |
container_issue |
19 |
container_start_page |
7352 |
op_container_end_page |
7371 |
_version_ |
1776198738767773696 |