Comparisons of Numerical Comparisons of Numerical Aspects in POM and ROMS Aspects in POM and ROMS Tal Ezer Tal Ezer Princeton University Princeton University (in collaboration with H. Arango (in collaboration with H. Arango (Rutgers) & (Rutgers) & A. Shchepetkin (UCLA); Supported by A. Shchepetkin (UCLA); Supported by ONR) ONR)
Comparisons of Numerical Aspects in POM and ROMS. Tal Ezer Princeton University (in collaboration with H. Arango (Rutgers) & A. Shchepetkin (UCLA); Supported by ONR). Part of an initiative to develop, evaluate and test an expert Terrain-following Ocean Modeling System (TOMS). - PowerPoint PPT Presentation
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Comparisons of Numerical Comparisons of Numerical Aspects in POM and ROMSAspects in POM and ROMS
Tal EzerTal EzerPrinceton UniversityPrinceton University
(in collaboration with H. Arango (Rutgers) & (in collaboration with H. Arango (Rutgers) & A. Shchepetkin (UCLA); Supported by ONR)A. Shchepetkin (UCLA); Supported by ONR)
Part of an initiative to develop, Part of an initiative to develop, evaluate and test an expert evaluate and test an expert Terrain-Terrain-
following Ocean Modeling System following Ocean Modeling System (TOMS)(TOMS)
• Time stepping algorithmsTime stepping algorithms• Advection schemesAdvection schemes• Pressure gradient schemesPressure gradient schemes• Other numerical and configuration aspectsOther numerical and configuration aspects
Compare numerical elements and Compare numerical elements and parameterizations in POM and ROMS/TOMS in parameterizations in POM and ROMS/TOMS in
terms of their numerical errors, numerical terms of their numerical errors, numerical stability, stability,
Structure ofStructure ofV (cm/s) in ROMS for different V (cm/s) in ROMS for different PG schemes (medium seamount case)PG schemes (medium seamount case)
PG errors- very steep PG errors- very steep seamountseamount
(preliminary) conclusions(preliminary) conclusions• New numerical schemes show promising results New numerical schemes show promising results
in reducing numerical errors while saving in reducing numerical errors while saving computational costs.computational costs.
• However, the behavior of these schemes may be However, the behavior of these schemes may be more complicated than standard schemes, and more complicated than standard schemes, and require users for more careful choices of model require users for more careful choices of model parameterizations.parameterizations.
• Therefore, communication between developers Therefore, communication between developers and users is important. and users is important.
• Further developments and testing of more Further developments and testing of more elements for TOMS will continue. elements for TOMS will continue.
And finally, no matter what car And finally, no matter what car you drive (POM, ROMS, etc.) …you drive (POM, ROMS, etc.) …