Regional Grid Refinement in an Earth System Model: Impacts on the Simulated Greenland Surface Mass Balance
Abstract. In this study, the resolution dependence of the simulated Greenland Ice Sheet surface mass balance in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are performed on three regionally refined grids over Greenland at 1° (~1...
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ftcdlib:oai:escholarship.org:ark:/13030/qt5hk9s9p6 2024-01-14T10:07:14+01:00 Regional Grid Refinement in an Earth System Model: Impacts on the Simulated Greenland Surface Mass Balance van Kampenhout, Leonardus Rhoades, Alan M Herrington, Adam R Zarzycki, Colin M Lenaerts, Jan TM Sacks, William J van den Broeke, Michiel R 2018-12-06 application/pdf https://escholarship.org/uc/item/5hk9s9p6 unknown eScholarship, University of California qt5hk9s9p6 https://escholarship.org/uc/item/5hk9s9p6 public Earth Sciences Atmospheric Sciences Climate Action article 2018 ftcdlib 2023-12-18T19:07:35Z Abstract. In this study, the resolution dependence of the simulated Greenland Ice Sheet surface mass balance in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are performed on three regionally refined grids over Greenland at 1° (~111 km), 0.5°(~55 km), and 0.25° (~28 km), maintaining a quasi-uniform resolution of 1° (~111 km) over the rest of the globe. The SMB in the accumulation zone is significantly improved compared to airborne radar and in-situ observations, with a general wetting at the margins and a drying in the interior GrIS. Total precipitation decreases with resolution, which is in line with best-available regional climate model results. In the ablation zone, VR-CESM starts developing a positive SMB bias in some locations. Potential driving mechanisms are proposed, amongst which are diversions in large scale circulation, changes in cloud cover, and changes in summer snowfall. Overall, our results demonstrate that VR-CESM is a viable new tool in the cryospheric sciences and can be used to dynamically downscale future scenarios and/or be interactively coupled to dynamical ice sheet models. Article in Journal/Newspaper Greenland Ice Sheet University of California: eScholarship Greenland |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Earth Sciences Atmospheric Sciences Climate Action |
spellingShingle |
Earth Sciences Atmospheric Sciences Climate Action van Kampenhout, Leonardus Rhoades, Alan M Herrington, Adam R Zarzycki, Colin M Lenaerts, Jan TM Sacks, William J van den Broeke, Michiel R Regional Grid Refinement in an Earth System Model: Impacts on the Simulated Greenland Surface Mass Balance |
topic_facet |
Earth Sciences Atmospheric Sciences Climate Action |
description |
Abstract. In this study, the resolution dependence of the simulated Greenland Ice Sheet surface mass balance in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are performed on three regionally refined grids over Greenland at 1° (~111 km), 0.5°(~55 km), and 0.25° (~28 km), maintaining a quasi-uniform resolution of 1° (~111 km) over the rest of the globe. The SMB in the accumulation zone is significantly improved compared to airborne radar and in-situ observations, with a general wetting at the margins and a drying in the interior GrIS. Total precipitation decreases with resolution, which is in line with best-available regional climate model results. In the ablation zone, VR-CESM starts developing a positive SMB bias in some locations. Potential driving mechanisms are proposed, amongst which are diversions in large scale circulation, changes in cloud cover, and changes in summer snowfall. Overall, our results demonstrate that VR-CESM is a viable new tool in the cryospheric sciences and can be used to dynamically downscale future scenarios and/or be interactively coupled to dynamical ice sheet models. |
format |
Article in Journal/Newspaper |
author |
van Kampenhout, Leonardus Rhoades, Alan M Herrington, Adam R Zarzycki, Colin M Lenaerts, Jan TM Sacks, William J van den Broeke, Michiel R |
author_facet |
van Kampenhout, Leonardus Rhoades, Alan M Herrington, Adam R Zarzycki, Colin M Lenaerts, Jan TM Sacks, William J van den Broeke, Michiel R |
author_sort |
van Kampenhout, Leonardus |
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 |
eScholarship, University of California |
publishDate |
2018 |
url |
https://escholarship.org/uc/item/5hk9s9p6 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
qt5hk9s9p6 https://escholarship.org/uc/item/5hk9s9p6 |
op_rights |
public |
_version_ |
1788061641973170176 |