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Most analysis tools and other tools can not handle higher order elements such as used in CAM-SE. For these codes, we produce metadata that will divide each spectral element into a subcell. This subcell grid is shown below. Note that the Gauss-Lobatto points (where CAM physics is computed) are the vertices of this grid. This meta data can be used by Paraview and Visit to plot native grid CAM-SE output. The metadata is stored in a grid template file that typically has a file name of the form "ne4np4<gridname>_latlon_DATE.nc" in the grids directory of the ACME inputdata server.
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To remap data from the SE grid to other grids, ACME relies on ESMF mapping utilities. ESMF's conservative remapping algorithm can currently only map cell centered data. For every point in the mesh, ESMF treats that point as a cell average value, and requires that we specify its cell boundaries as a polygon. These polygons are the dual grid to the SE subcell grid. The metadata is stored in a grid template file in "SCRIP" format, that typically has a file name of the form "ne4np4<gridname>_scrip-DATE.nc" in the grids directory of the ACME inputdata server.
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