MPAS-Seaice (v1.0.0): sea-ice dynamics on unstructured Voronoi meshes
Abstract
Abstract. We present MPAS-Seaice, a sea-ice model which uses the Model for Prediction Across Scales (MPAS) framework and spherical centroidal Voronoi tessellation (SCVT) unstructured meshes. As well as SCVT meshes, MPAS-Seaice can run on the traditional quadrilateral grids used by sea-ice models such as CICE. The MPAS-Seaice velocity solver uses the elastic–viscous–plastic (EVP) rheology and the variational discretization of the internal stress divergence operator used by CICE, but adapted for the polygonal cells of MPAS meshes, or alternatively an integral (“finite-volume”) formulation of the stress divergence operator. An incremental remapping advection scheme is used for mass and tracer transport. We validate these formulations with idealized test cases, both planar and on the sphere. The variational scheme displays lower errors than the finite-volume formulation for the strain rate operator but higher errors for the stress divergence operator. The variational stress divergence operator displays increased errors around the pentagonal cells of a quasi-uniform mesh, which is ameliorated with an alternate formulation for the operator. MPAS-Seaice shares the sophisticated column physics and biogeochemistry of CICE and when used with quadrilateral meshes can reproduce the results of CICE. We have used global simulations with realistic forcing to validate MPAS-Seaice against similar simulations with CICEmore »
- Authors:
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE; USDOE Office of Science (SC). Biological and Environmental Research (BER)
- OSTI Identifier:
- 1867040
- Alternate Identifier(s):
- OSTI ID: 1880472
- Report Number(s):
- LA-UR-18-21850
Journal ID: ISSN 1991-9603
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Published Article
- Journal Name:
- Geoscientific Model Development (Online)
- Additional Journal Information:
- Journal Name: Geoscientific Model Development (Online) Journal Volume: 15 Journal Issue: 9; Journal ID: ISSN 1991-9603
- Publisher:
- Copernicus GmbH
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 58 GEOSCIENCES; earth sciences
Citation Formats
Turner, Adrian K., Lipscomb, William H., Hunke, Elizabeth C., Jacobsen, Douglas W., Jeffery, Nicole, Engwirda, Darren, Ringler, Todd D., and Wolfe, Jonathan D. MPAS-Seaice (v1.0.0): sea-ice dynamics on unstructured Voronoi meshes. Germany: N. p., 2022.
Web. doi:10.5194/gmd-15-3721-2022.
Turner, Adrian K., Lipscomb, William H., Hunke, Elizabeth C., Jacobsen, Douglas W., Jeffery, Nicole, Engwirda, Darren, Ringler, Todd D., & Wolfe, Jonathan D. MPAS-Seaice (v1.0.0): sea-ice dynamics on unstructured Voronoi meshes. Germany. https://doi.org/10.5194/gmd-15-3721-2022
Turner, Adrian K., Lipscomb, William H., Hunke, Elizabeth C., Jacobsen, Douglas W., Jeffery, Nicole, Engwirda, Darren, Ringler, Todd D., and Wolfe, Jonathan D. Tue .
"MPAS-Seaice (v1.0.0): sea-ice dynamics on unstructured Voronoi meshes". Germany. https://doi.org/10.5194/gmd-15-3721-2022.
@article{osti_1867040,
title = {MPAS-Seaice (v1.0.0): sea-ice dynamics on unstructured Voronoi meshes},
author = {Turner, Adrian K. and Lipscomb, William H. and Hunke, Elizabeth C. and Jacobsen, Douglas W. and Jeffery, Nicole and Engwirda, Darren and Ringler, Todd D. and Wolfe, Jonathan D.},
abstractNote = {Abstract. We present MPAS-Seaice, a sea-ice model which uses the Model for Prediction Across Scales (MPAS) framework and spherical centroidal Voronoi tessellation (SCVT) unstructured meshes. As well as SCVT meshes, MPAS-Seaice can run on the traditional quadrilateral grids used by sea-ice models such as CICE. The MPAS-Seaice velocity solver uses the elastic–viscous–plastic (EVP) rheology and the variational discretization of the internal stress divergence operator used by CICE, but adapted for the polygonal cells of MPAS meshes, or alternatively an integral (“finite-volume”) formulation of the stress divergence operator. An incremental remapping advection scheme is used for mass and tracer transport. We validate these formulations with idealized test cases, both planar and on the sphere. The variational scheme displays lower errors than the finite-volume formulation for the strain rate operator but higher errors for the stress divergence operator. The variational stress divergence operator displays increased errors around the pentagonal cells of a quasi-uniform mesh, which is ameliorated with an alternate formulation for the operator. MPAS-Seaice shares the sophisticated column physics and biogeochemistry of CICE and when used with quadrilateral meshes can reproduce the results of CICE. We have used global simulations with realistic forcing to validate MPAS-Seaice against similar simulations with CICE and against observations. We find very similar results compared to CICE, with differences explained by minor differences in implementation such as with interpolation between the primary and dual meshes at coastlines. We have assessed the computational performance of the model, which, because it is unstructured, runs with 70 % of the throughput of CICE for a comparison quadrilateral simulation. The SCVT meshes used by MPAS-Seaice allow removal of equatorial model cells and flexibility in domain decomposition, improving model performance. MPAS-Seaice is the current sea-ice component of the Energy Exascale Earth System Model (E3SM).},
doi = {10.5194/gmd-15-3721-2022},
journal = {Geoscientific Model Development (Online)},
number = 9,
volume = 15,
place = {Germany},
year = {Tue May 10 00:00:00 EDT 2022},
month = {Tue May 10 00:00:00 EDT 2022}
}
https://doi.org/10.5194/gmd-15-3721-2022
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