Noah_MP

Build the HRLDAS driver from source with gfortran and NetCDF-Fortran, then use the provided tools: build_hrldas_setup.py for the domain file, convert_forcing_to_noahmp.py for LDASIN forcing, and run_noahmp.py to execute the binary. Run preflight_check.py first to verify the environment.

Use convert_forcing_to_noahmp.py with --source fluxnet, which reads FULLSET gap-filled tower meteorology and writes hourly LDASIN NetCDF files. The --utc_offset argument is mandatory because FLUXNET timestamps are local standard time while HRLDAS reads them as UTC.

Noah-MP requires T2D in Kelvin, RAINRATE in mm/s, Q2D as specific humidity in kg/kg, PSFC in Pascals, and SWDOWN/LWDOWN in W/m2. Passing Celsius, mm/hr, or relative humidity causes silent failures or crashes, each covered by a diagnostic triplet.

Check diagnostics/triplets.yaml first: NaN in vapor pressure usually means Celsius instead of Kelvin (dt_001), and extreme runoff means precipitation in mm/hr instead of mm/s (dt_002). Negative interpolated shortwave radiation also causes energy-balance errors (dt_004).

Yes, with CROP_OPTION=1 and IRRIGATION_OPTION set, but the land use must be a MODIS cropland class and irrigation fractions must be in a separate AGDATA file. build_hrldas_setup.py writes both files and validates ranks and activation thresholds.

The offline HRLDAS mode does not simulate the atmosphere, so forcing must be supplied, and it performs no lateral river routing. Column runoff is not streamflow; comparing to gauged discharge requires an external routing model such as WRF-Hydro.