I modified the WRF Registry to output the ZNT (surface roughness length) variable, and I can now see it in my wrfout files. However, I noticed that ZNT changes with time during the simulation.
I tried setting the same values for Z0MIN and Z0MAX in the physics options, but this did not prevent ZNT from evolving.
How can I keep ZNT constant in time, i.e., use the initialized (or prescribed) roughness length from VEGPARM.TBL throughout the run?
I tried setting the same values for Z0MIN and Z0MAX in the physics options, but this did not prevent ZNT from evolving.
How can I keep ZNT constant in time, i.e., use the initialized (or prescribed) roughness length from VEGPARM.TBL throughout the run?