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HyPOP: Momentum and Tracers on Separate ALE Grids
Mark Petersen, John Dukowicz, Matthew Hecht, Phil Jones, Todd Ringler, Wilbert Weijer
Los Alamos National Laboratory
(Abstract received 05/11/2009 for session X)
ABSTRACT
The HyPOP ocean model, under development at Los Alamos National Laboratory, solves the momentum equation and tracer equations on two separate grids. Each of these grids are Arbitrary Lagrangian-Eulerian (ALE), and so may be chosen to be z-level, isopycnal, sigma, or some hybrid combination. Versatility is a key design feature, so that different combinations of grid types may be tested and compared. One relevant configuration is to solve momentum on a z-level grid, and tracers on a hybrid isopycnal-z grid, so that tracer mixing occurs naturally along isopycnal surfaces. HyPOP discretizes spatial derivatives with finite differences, is based on a logically rectangular horizontal B-grid, and will have several timestepping methods to choose from. HyPOP infrastructure development is now largely complete. We are currently testing HyPOP with various grids, and testing methods for time-dependent regridding.
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2009 LOM Workshop, Miami, Florida Jume 1 - 3, 2009