Editing the geo file

[sashank]

I’m currently running Noah-MP + BEP/BEM (sf_urban_physics = 3) simulations using HRLDAS/WRF and working with CGLC_MODIS_LCZ_global data for urban classification.

For a sensitivity experiment, I want to test the impact of ±20 % vegetation fraction changes (e.g., to simulate adding or removing tree cover) over an urban domain.


Can I directly modify the VEGFRA (or FRC_URB2D if relevant) variable in the geo_em.d01.nc file before running real.exe and HRLDAS, or do I need to modify the LCZ (LANDUSEF) categories and regenerate the geogrid files instead?

Goal is to cut the time short

 

[kwerner]

Hi, Apologies for the delay. When needing to modify a static field, it should be fine to make the modifications in the geo_em* files. However, some of the fields you're interested in may be overwritten by the LSM tables during WRF (see details - scroll down to the section for "LSM Tables"), so it's possible you may need to modify the tables instead.