meteoadriatic
Member
Hello,
The version 4.8.0 replaces pretty good scale-aware convection scheme, Grell-Freitas, that was battle-tested, extremely good behaved, with "improved" one, namely Grell_Freitas-Li, but this one shows pretty dramatic regression in quality.
I'm testing one challenging convective case using 3 km grid and just wondered if GFL will do better than GF. So I compiled 4.8.0 and used bit-identical namelist, with cu_physics = 3, which means that active cumulus scheme is now GFL instead of GF.
These are results, which speak for themselves:
All coastal convection that scale-aware GF correctly allowed to be explicitelly resolved by 3 km grid, is supressed and turned into drizzle in GFL.
I don't understand why this has been done (replacing good, operational scheme by many users, with new, untested one, instead of adding new option along existing one)?
Best wishes,
Ivan
The version 4.8.0 replaces pretty good scale-aware convection scheme, Grell-Freitas, that was battle-tested, extremely good behaved, with "improved" one, namely Grell_Freitas-Li, but this one shows pretty dramatic regression in quality.
I'm testing one challenging convective case using 3 km grid and just wondered if GFL will do better than GF. So I compiled 4.8.0 and used bit-identical namelist, with cu_physics = 3, which means that active cumulus scheme is now GFL instead of GF.
These are results, which speak for themselves:
All coastal convection that scale-aware GF correctly allowed to be explicitelly resolved by 3 km grid, is supressed and turned into drizzle in GFL.
I don't understand why this has been done (replacing good, operational scheme by many users, with new, untested one, instead of adding new option along existing one)?
Best wishes,
Ivan