| Summary: | This major release of MPAS introduces significant new features in the MPAS-Atmosphere model and its supporting software infrastructure. Initialization: Enable parallel remapping of static fields with arbitrary graph partition files; special CVT partition files are no longer required. Reset the default for the lower air-temperature extrapolation (<code>config_extrap_airtemp</code>) from 'linear' to 'lapse-rate' in the namelist. This applies to initialization and to lateral boundary condition generation for MPAS-A. Set the condition for the lower extrapolation of the horizontal velocity such that it returns the lowest analysis level value instead of a linear extrapolation when the requested level is below the analysis level. Create a new init case (13) for creating 3-d CAM-MPAS grids. Physics: Update the Noah land surface scheme to the WRF 4.5 release. Update the MM5 surface layer scheme to the WRF 4.5 release. Implemented the CCPP-compliant version of: the revised MM5 surface layer scheme; the parameterization of the gravity-wave drag over orography; the YSU Planetary Boundary Layer scheme; the scale-aware nTiedtke parameterization of convection; and the WSM6 cloud microphysics parameterization. Correct the initialization of the maximum snow albedo over sea ice points (now set to 0.75 instead of 0). Fix the option that defines the surface albedo over sea ice points. The default option is now set to zero and the default value for the surface albedo over sea ice points is set to 0.65. In the dynamics, rework the computation of the advective tendency of potential temperature needed as forcing in the nTiedtke and Grell-Freitas parameterizations of deep convection. The advective tendency of potential temperature is now computed the same way for the nTiedtke and Grell-Freitas convection schemes. IMPORTANT NOTE: The updated Noah scheme requires new look-up tables. The <code>checkout_data_files.sh</code> script that is run at build time should correctly update these tables, but tables in other run ...
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