RRTMGP Port

[AMLattanzi]

This adds radiation via RRTMGP and YAKL. The RRTMGP submodule is set to coincide with what is currently used by the EAMXX component of E3SM; see here. The files added to ERF are modeled after and ported from those used in EAMXX; see here.

TODO action items:

• Remove unnecessary code
• O3 volume mixing ratio is function of height
• Add doc info for inputs and outputs
• Hook up to LSM (mu0, albedo, zenith)
• Hook up to orbital calcs (commented out for now)
• Sort out lat/lon availability (only with real init?)
• Allow for multi-level calcs (only level 0 calls update right now)
• Convert rad src for application to dry pot temp
• Replicate simple unit test and compare output

[AMLattanzi]

@pressel can you take a look at the following:

ERF/Source/Radiation/ERF_Radiation.cpp

Line 425 in e531a88

// TODO: Fill properly

ERF/Source/Radiation/ERF_Radiation.cpp

Line 449 in e531a88

// TODO: Fill properly

ERF/Source/Radiation/ERF_Radiation.cpp

Line 455 in e531a88

// TODO: Fill properly

ERF/Source/Radiation/ERF_Radiation.cpp

Line 595 in e531a88

tmp2d(icol,ilay) = qv_lay(icol,ilay) * mwdair/ gas_mol_weight;

[AMLattanzi]

lwp and iwp are filled in a specific spot. I did away with nc_lay since it was only used for output data we don't have or use. I think the h2o vmr is computed correctly, but a second set of eyes would be useful.

The eff_radius quantities are inputs that we must compute; any insight there would be helpful.

[AMLattanzi]

Successful unit test. To replicate results, the ifdef 0 in ERF_Radiation.cpp must be set to 1 and the files in Exec/DevTest/Radiation must be used.