MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes
Climate model components utilizing unstructured meshes enable variableresolution, regionally enhanced simulations within global domains. Here we investigate the relationship between mesh quality and simulation statistics using the JIGSAW unstructured meshing library and the Model for Prediction Acro...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20200002116 2023-05-15T18:25:38+02:00 MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes Petersen, Mark R. Wolfram, Phillip J. Roberts, Andrew F. Engwirda, Darren Hoch, Kristin E. Rosa, Kevin L. Brus, Steven R. Unclassified, Unlimited, Publicly available February 26, 2020 application/pdf http://hdl.handle.net/2060/20200002116 unknown Document ID: 20200002116 http://hdl.handle.net/2060/20200002116 Copyright, Public use permitted CASI Meteorology and Climatology GSFC-E-DAA-TN78720 Journal of Advances in Modelling Earth Systems (JAMES) (e-ISSN 1942-2466); 12; 3; e2019MS001848 2020 ftnasantrs 2020-04-11T22:47:51Z Climate model components utilizing unstructured meshes enable variableresolution, regionally enhanced simulations within global domains. Here we investigate the relationship between mesh quality and simulation statistics using the JIGSAW unstructured meshing library and the Model for Prediction Across ScalesOcean (MPASOcean) with a focus on Gulf Stream dynamics. In the base configuration, the refined region employs 8 km cells that extend 400 km from the coast of North America. This coastal refined region is embedded within a lowresolution global domain, with cell size varying latitudinally between 30 and 60 km. The resolution transition region between the refined region and background mesh is 600 km wide. Three sensitivity tests are conducted: 1) the quality of meshes is intentionally degraded so that horizontal cells are progressively more distorted; 2) the transition region from high to low resolution is steepened; and 3) resolution of the coastal refinement region is varied from 30 km to 8 km. Overall, the ocean simulations are shown to be robust to mesh resolution and quality alterations. Meshes that are substantially degraded still produce realistic currents, with Southern Ocean transports within 0.4% and Gulf Stream transports within 12% of highquality mesh results. The narrowest transition case of 100 km did not produce any spurious effects. Refined regions with high resolution produce eddy kinetic energy and sea surface height variability that are similar to the highresolution reference simulation. These results provide heuristics for the design criteria of variableresolution climate model domains. Other/Unknown Material Southern Ocean NASA Technical Reports Server (NTRS) Southern Ocean |
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NASA Technical Reports Server (NTRS) |
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Meteorology and Climatology |
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Meteorology and Climatology Petersen, Mark R. Wolfram, Phillip J. Roberts, Andrew F. Engwirda, Darren Hoch, Kristin E. Rosa, Kevin L. Brus, Steven R. MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes |
topic_facet |
Meteorology and Climatology |
description |
Climate model components utilizing unstructured meshes enable variableresolution, regionally enhanced simulations within global domains. Here we investigate the relationship between mesh quality and simulation statistics using the JIGSAW unstructured meshing library and the Model for Prediction Across ScalesOcean (MPASOcean) with a focus on Gulf Stream dynamics. In the base configuration, the refined region employs 8 km cells that extend 400 km from the coast of North America. This coastal refined region is embedded within a lowresolution global domain, with cell size varying latitudinally between 30 and 60 km. The resolution transition region between the refined region and background mesh is 600 km wide. Three sensitivity tests are conducted: 1) the quality of meshes is intentionally degraded so that horizontal cells are progressively more distorted; 2) the transition region from high to low resolution is steepened; and 3) resolution of the coastal refinement region is varied from 30 km to 8 km. Overall, the ocean simulations are shown to be robust to mesh resolution and quality alterations. Meshes that are substantially degraded still produce realistic currents, with Southern Ocean transports within 0.4% and Gulf Stream transports within 12% of highquality mesh results. The narrowest transition case of 100 km did not produce any spurious effects. Refined regions with high resolution produce eddy kinetic energy and sea surface height variability that are similar to the highresolution reference simulation. These results provide heuristics for the design criteria of variableresolution climate model domains. |
format |
Other/Unknown Material |
author |
Petersen, Mark R. Wolfram, Phillip J. Roberts, Andrew F. Engwirda, Darren Hoch, Kristin E. Rosa, Kevin L. Brus, Steven R. |
author_facet |
Petersen, Mark R. Wolfram, Phillip J. Roberts, Andrew F. Engwirda, Darren Hoch, Kristin E. Rosa, Kevin L. Brus, Steven R. |
author_sort |
Petersen, Mark R. |
title |
MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes |
title_short |
MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes |
title_full |
MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes |
title_fullStr |
MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes |
title_full_unstemmed |
MPAS - Ocean Simulation Quality for Variable-Resolution North American Coastal Meshes |
title_sort |
mpas - ocean simulation quality for variable-resolution north american coastal meshes |
publishDate |
2020 |
url |
http://hdl.handle.net/2060/20200002116 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
CASI |
op_relation |
Document ID: 20200002116 http://hdl.handle.net/2060/20200002116 |
op_rights |
Copyright, Public use permitted |
_version_ |
1766207221064007680 |