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SE = Atmosphere spectral element dycore mesh ( CAM-SE Grid Overview ). Usually in "np4" configuration where each element has a 4x4 array of GLL nodes.
FV = MPAS finite volume mesh or, for the v2 trigrid setups, the FV r05 and r0125 land and river runoff grids, and SE atmosphere "physgrids" pg2 and pg3 options.
Grid description/tempalte files:
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UPDATE 2020/2/21: Removing highorder maps which can have negative weights. It's probably a bad idea to use negative weights in a coupled simulation, and we shouldn't recommend this without detailed evaluation.
Recommended Settings: For ATM SE grids with physics on the "np4" grid (used in V1), coupled to FV ocean and FV land
- SE → FV for fluxes: use "mono"
SE → FV for state variables: "highorder". ).not recommended.- SE → FV for state variables: intbilin?
- FV → SE for fluxes: monotr
- The best map is the transpose of the SE->FV map computed above:
- This is the most important map, as it is used to compute the domain files and defines the ocean/land mask on the atm/land grid.
FV → SE for state variables and velocity: highorder.not recommended.- Tests with ocean120→NE30, analytic fields, show this map is more accurate than the transpose map.
- FV → SE mono.
- This is also a good monotone/conservative map for fluxes, but not quite as accurate (in analytic tests) as the transpose map recommended above.
- FV → SE for state variables
- ocn→atm: currently this map must be the same as used for fluxes.
- lnd→atm: if land grid resolution >> atmosphere resolution: "mono"
- lnd→atm: if land grid resolution <= atmosphere resolution: ESMF's bilin.
- DESIRED: a version of intbilin for FV source grids.
Recommended Settings: For ATM FV grids (with physics on the
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"pg2"
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grid, used in V2) coupled to FV ocean and FV land
- fluxes: mono
- state variables:
- ocn→atm: currently this map must be the same as used for fluxes.
- lnd↔atm and atm→ocn
- if source grid resolution >> target grid resolution: "mono"
- source grid resolution <= target grid resoluiton: ESMF's bilin
- DESIRED: a version of intbilin for FV source grids.
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