RRFS-MPAS: Various fixes and enhancements

[jaymes-kenyon]

This PR addresses issue #1108 for RRFS-MPAS applications. It provides the following changes:

1. Temporary hard coding of imp_physics=8 for RRFS-MPAS, as required for brightness-temperature calculations in subroutine CALRAD_WCLOUD
2. Updates to enable various microphysics-related output in RRFS-MPAS, namely:
   • cloud-ice mixing ratio (isobaric and native levels)
   • graupel mixing ratio (isobaric and native levels)
   • ice-friendly aerosol number concentration (native levels)
   • water-friendly aerosol number concentration (native levels)

These updates run successfully within GSL's real-time RRFS-MPAS applications on Jet.

[WenMeng-NOAA]

@jaymes-kenyon My UPP standalone test for MPAS is at /scratch1/NCEPDEV/stmp2/Wen.Meng/mpas_2024082112-after on Hera, please let me know if you see issues.

[jaymes-kenyon]

Thanks, @WenMeng-NOAA! I think your results look as expected.

Within the WRFNAT12.tm00 file, I noticed three microphysics variables (NCONCD, PMTF, and PMTC) that had all zero values. This was because the RRFS netCDF file is somewhat old and is missing these arrays.

I will transfer a newer netCDF file onto Hera for future testing, but I think this test went as expected.

[jaymes-kenyon]

A quick update: I transferred a newer RRFS-MPAS netCDF file onto Hera:
/scratch2/BMC/wrfruc/kenyon/sample/rrfs_mpas/2024112012/MPAS-A_out.2024-11-21_00.00.00.nc
It contains several new arrays, so it should be helpful for future UPP testing.

[WenMeng-NOAA]

@jaymes-kenyon Please take a look at my new test with MPAS data you provided at /home/Wen.Meng/stmp2/mpas_2024112100 on Hera.

[jaymes-kenyon]

@WenMeng-NOAA — Your latest test looks good—thanks for re-running it!