Hello everyone,
I want to modify WRF input topography to create, for example, a smoother region or cut off high mountains. After researching the procedure, I found many people choose to modify HGT_M variable in geogrid output file. I tried this approach, and it worked well, resulting in consistently higher temperatures in the smoothed areas.
However, I found this post in the forum: Removing Terrain and Converting Land to Sea
It also talks about variables VAR, VAR_SSO, CON, OA[1-4], OL[1-4] in the geogrid file which are dependent on the surface terrain. Unfortunately, I couldn't find much information about these variables.For instance, OA[1-4] and OL[1-4] have the same description and lack units. Should I modify them accordingly if I already changed HGT_M field? Would it really make a difference?
I want to modify WRF input topography to create, for example, a smoother region or cut off high mountains. After researching the procedure, I found many people choose to modify HGT_M variable in geogrid output file. I tried this approach, and it worked well, resulting in consistently higher temperatures in the smoothed areas.
However, I found this post in the forum: Removing Terrain and Converting Land to Sea
It also talks about variables VAR, VAR_SSO, CON, OA[1-4], OL[1-4] in the geogrid file which are dependent on the surface terrain. Unfortunately, I couldn't find much information about these variables.For instance, OA[1-4] and OL[1-4] have the same description and lack units. Should I modify them accordingly if I already changed HGT_M field? Would it really make a difference?