2025-05-08 All-Hands Presentation Meeting Notes
Implementation of subgrid approaches accounting for unresolved topography in MPAS-Ocean
Damrongsak Wirasaet
Civil and Environmental Engineering and Earth Sciences
University of Notre Dame
Abstract:
Faithfully representing topography and bathymetry at sufficiently high grid resolution is known to be a crucial factor in obtaining accurate results in coastal flow simulations. However, in practice, a compromise in the grid resolution is often unavoidable because of a constraint in computing time. As a result, a predictive capability of the model may suffer especially in inundation and recession zones. In this talk, we present the implementation of subgrid techniques accounting for unresolved topography in a single layer mode of the MPAS-Ocean. These techniques use integral properties of high-resolution bathymetry, topography, and land cover to introduce corrections into coarser resolution models, and can improve their accuracy near the land-water interface while having no significant effects in deeper regions. Numerical experiments using a set of test cases with nonstationary shorelines, ranging from an idealized test problem with an analytical solution to a realistic test case of storm surge induced by a tropical cyclone, demonstrate that the subgrid method can substantially improve the predictive capability of the MPAS-O coarse-grid simulations with only a minor increase in the computing time.
Date May 8, 2025
Time
PT: 8:30 am
ET: 11:30 am
Call Info
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Time | Title | Presenter | Presentation | Recording | Notes |
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30 min | Implementation of subgrid approaches accounting for unresolved topography in MPAS-Ocean | Damrongsak Wirasaet | 
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