Merge branch 'mp_thompson_cldfra' into hotfix-v8.0.2 (PR #1153)

This merge fixes a bug when calling the Thompson parameterization of the cloud
fraction. The input to the Thompson scheme expects the grid scale to be in units
of km, but in the mpas_atmphys_driver_cloudiness module, dx_p was in units of
meters. The unit of dx_p has been corrected to be in kilometers.

Acknowledgements: Thanks to Brett Wilt for first identifying the bug in the
units of dx_p in the call to the Thompson cloud fraction scheme.

* mp_thompson_cldfra:
  * In ./src/core_atmosphere/physics/mpas_atmphys_driver_cloudiness.F, corrected the units of   the variable dx_p from meters to kilometers (dx_p is used in the Thompson parameterization   of the cloud fraction).

Author: mgduda

src/core_atmosphere/physics/mpas_atmphys_driver_cloudiness.F

@@ -51,7 +51,10 @@ module mpas_atmphys_driver_cloudiness
 !   Laura D. Fowler (laura@ucar.edu) / 2016-07-05.
 ! * since we removed the local variable radt_cld_scheme from mpas_atmphys_vars.F, now defines radt_cld_scheme
 !   as a pointer to config_radt_cld_scheme.
-!   Laura D. Fowler (laura@ucar.edu) / 2917-02-16.
+!   Laura D. Fowler (laura@ucar.edu) / 2017-02-16.
+! * this is a bug fix. dx_p is converted from meters to kilometers prior to calling the thompson parameterization
+!   of the cloud fraction.
+!   Laura D. Fowler (laura@ucar.edu) / 2024-03-23.
 
 
  contains
@@ -119,6 +122,8 @@ subroutine cloudiness_from_MPAS(configs,mesh,diag_physics,sfc_input,its,ite)
  do j = jts,jte
     do i = its,ite
        dx_p(i,j)    = len_disp / meshDensity(i)**0.25
+       !conversion of dx_p from meters to kilometers.
+       dx_p(i,j)    = dx_p(i,j)*0.001
        xland_p(i,j) = xland(i)
     enddo