Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance
In this study, the resolution dependence of the simulated Greenland ice sheet surface mass balance (GrIS SMB) in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are performed on two regionally refined grids over Greenland at 0.5 deg...
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Language: | English |
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Online Access: | https://doi.org/10.5194/tc-13-1547-2019 |
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ftncar:oai:drupal-site.org:articles_22571 2023-09-05T13:19:49+02:00 Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance van Kampenhout, Leonardus (author) Rhoades, Alan M. (author) Herrington, Adam R. (author) Zarzycki, Colin M. (author) Lenaerts, Jan T. M. (author) Sacks, William J. (author) van den Broeke, Michiel R. (author) 2019-06-03 https://doi.org/10.5194/tc-13-1547-2019 en eng The Cryosphere--The Cryosphere--1994-0424 Postprocessed output from VR-CESM with refinement over the greater Greenland area and a CAM-SE control experiment--10.5281/zenodo.2579606 articles:22571 ark:/85065/d7k35xrc doi:10.5194/tc-13-1547-2019 Copyright 2019 Author(s). This work is licensed under a Creative Commons Attribution 4.0 International license. article Text 2019 ftncar https://doi.org/10.5194/tc-13-1547-2019 2023-08-14T18:49:29Z In this study, the resolution dependence of the simulated Greenland ice sheet surface mass balance (GrIS SMB) in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are performed on two regionally refined grids over Greenland at 0.5 degrees (similar to 55 km) and 0.25 degrees (similar to 28 km), maintaining a quasi-uniform resolution of 1 degrees (similar to 111 km) over the rest of the globe. On the refined grids, the SMB in the accumulation zone is significantly improved compared to airborne radar and in situ observations, with a general wetting (more snowfall) at the margins and a drying (less snowfall) in the interior GrIS. Total GrIS precipitation decreases with resolution, which is in line with best-available regional climate model results. In the ablation zone, CESM starts developing a positive SMB bias with increased resolution in some basins, notably in the east and the north. The mismatch in ablation is linked to changes in cloud cover in VR-CESM, and a reduced effectiveness of the elevation classes subgrid parametrization in CESM. Overall, our pilot study introduces VR-CESM as a new tool in the cryospheric sciences, which could be used to dynamically downscale SMB in scenario simulations and to force dynamical ice sheet models through the CESM coupling framework. DESC0016605 Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Greenland The Cryosphere 13 6 1547 1564 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
In this study, the resolution dependence of the simulated Greenland ice sheet surface mass balance (GrIS SMB) in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are performed on two regionally refined grids over Greenland at 0.5 degrees (similar to 55 km) and 0.25 degrees (similar to 28 km), maintaining a quasi-uniform resolution of 1 degrees (similar to 111 km) over the rest of the globe. On the refined grids, the SMB in the accumulation zone is significantly improved compared to airborne radar and in situ observations, with a general wetting (more snowfall) at the margins and a drying (less snowfall) in the interior GrIS. Total GrIS precipitation decreases with resolution, which is in line with best-available regional climate model results. In the ablation zone, CESM starts developing a positive SMB bias with increased resolution in some basins, notably in the east and the north. The mismatch in ablation is linked to changes in cloud cover in VR-CESM, and a reduced effectiveness of the elevation classes subgrid parametrization in CESM. Overall, our pilot study introduces VR-CESM as a new tool in the cryospheric sciences, which could be used to dynamically downscale SMB in scenario simulations and to force dynamical ice sheet models through the CESM coupling framework. DESC0016605 |
author2 |
van Kampenhout, Leonardus (author) Rhoades, Alan M. (author) Herrington, Adam R. (author) Zarzycki, Colin M. (author) Lenaerts, Jan T. M. (author) Sacks, William J. (author) van den Broeke, Michiel R. (author) |
format |
Article in Journal/Newspaper |
title |
Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance |
spellingShingle |
Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance |
title_short |
Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance |
title_full |
Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance |
title_fullStr |
Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance |
title_full_unstemmed |
Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance |
title_sort |
regional grid refinement in an earth system model: impacts on the simulated greenland surface mass balance |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-1547-2019 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_relation |
The Cryosphere--The Cryosphere--1994-0424 Postprocessed output from VR-CESM with refinement over the greater Greenland area and a CAM-SE control experiment--10.5281/zenodo.2579606 articles:22571 ark:/85065/d7k35xrc doi:10.5194/tc-13-1547-2019 |
op_rights |
Copyright 2019 Author(s). This work is licensed under a Creative Commons Attribution 4.0 International license. |
op_doi |
https://doi.org/10.5194/tc-13-1547-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
6 |
container_start_page |
1547 |
op_container_end_page |
1564 |
_version_ |
1776200622399291392 |