Parameters and values in the YSU PBL scheme in WRF v4.6

[Liliputian_123]

Dear WRF Experts,

In the earlier version of WRF, the constants and parameters are declared in the .F codes. For example, for the YSU PBL scheme:
Link to YSU Physics module

 real,parameter    ::  xkzmin = 0.01,xkzmax = 1000.,rimin = -100.
   real,parameter    ::  rlam = 30.,prmin = 0.25,prmax = 4.
   real,parameter    ::  brcr_ub = 0.0,brcr_sb = 0.25,cori = 1.e-4
   real,parameter    ::  afac = 6.8,bfac = 6.8,pfac = 2.0,pfac_q = 2.0
   real,parameter    ::  phifac = 8.,sfcfrac = 0.1
   real,parameter    ::  d1 = 0.02, d2 = 0.05, d3 = 0.001
   real,parameter    ::  h1 = 0.33333335, h2 = 0.6666667
   real,parameter    ::  ckz = 0.001,zfmin = 1.e-8,aphi5 = 5.,aphi16 = 16.
   real,parameter    ::  tmin=1.e-2
   real,parameter    ::  gamcrt = 3.,gamcrq = 2.e-3
   real,parameter    ::  xka = 2.4e-5
   integer,parameter ::  imvdif = 1
!

But in version 4.6, I can no longer see these values. I would like to know where are the parameters declared in the latest version of WRF (4.6).



Thank you!

 

[kwerner]

Hi,
Apologies for the delay in response. It looks like the structure of the physics code was changed around a bit, in an effort to make the physics compliant to be used with WRF, MPAS, and CESM. The constants you're looking for are still available in the phys/physic_mmm/bl_ysu.F90 file. You can read about the details of the modification here.