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 ∘ (...
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ftdoajarticles:oai:doaj.org/article:ff9245d868b64644aa4c4758a8f6e8f2 2023-05-15T16:27:09+02:00 Regional grid refinement in an Earth system model: impacts on the simulated Greenland surface mass balance L. van Kampenhout A. M. Rhoades A. R. Herrington C. M. Zarzycki J. T. M. Lenaerts W. J. Sacks M. R. van den Broeke 2019-06-01T00:00:00Z https://doi.org/10.5194/tc-13-1547-2019 https://doaj.org/article/ff9245d868b64644aa4c4758a8f6e8f2 EN eng Copernicus Publications https://www.the-cryosphere.net/13/1547/2019/tc-13-1547-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-1547-2019 1994-0416 1994-0424 https://doaj.org/article/ff9245d868b64644aa4c4758a8f6e8f2 The Cryosphere, Vol 13, Pp 1547-1564 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/tc-13-1547-2019 2022-12-30T21:27:26Z 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 ∘ ( ∼55 km) and 0.25 ∘ ( ∼28 km), maintaining a quasi-uniform resolution of 1 ∘ ( ∼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. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Directory of Open Access Journals: DOAJ Articles Greenland The Cryosphere 13 6 1547 1564 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 L. van Kampenhout A. M. Rhoades A. R. Herrington C. M. Zarzycki J. T. M. Lenaerts W. J. Sacks M. R. van den Broeke Regional grid refinement in an Earth system model: impacts on the simulated Greenland surface mass balance |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 ∘ ( ∼55 km) and 0.25 ∘ ( ∼28 km), maintaining a quasi-uniform resolution of 1 ∘ ( ∼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. |
format |
Article in Journal/Newspaper |
author |
L. van Kampenhout A. M. Rhoades A. R. Herrington C. M. Zarzycki J. T. M. Lenaerts W. J. Sacks M. R. van den Broeke |
author_facet |
L. van Kampenhout A. M. Rhoades A. R. Herrington C. M. Zarzycki J. T. M. Lenaerts W. J. Sacks M. R. van den Broeke |
author_sort |
L. van Kampenhout |
title |
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 |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-1547-2019 https://doaj.org/article/ff9245d868b64644aa4c4758a8f6e8f2 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 13, Pp 1547-1564 (2019) |
op_relation |
https://www.the-cryosphere.net/13/1547/2019/tc-13-1547-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-1547-2019 1994-0416 1994-0424 https://doaj.org/article/ff9245d868b64644aa4c4758a8f6e8f2 |
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 |
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1766016245374648320 |