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We note that the TempestRemap package uses an algorithm that understands both SE and FV grids (Ullrich & Taylor, MWR 2015) and can produce map files directly from the CAM-SE Native grid. It only needs the SE Native grid (the first grid shown on this page) and does not need any type of dual grid. These mapping files are more accurate since they take advantage of the SE discretization. If ACME adopts atmosphere adopted TempestRemap mapping files, we will not need to use the SE dual grid shown above.
Also, the "physics grid" work, when completed, will allow us to run CAM physics at cell centers of the subcell grid (instead of vertices). It will also allow us to run the physics on a subcell grid with equally spaced subcell centers. Either of these options will mean we would no longer need the SE dual grid.
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