RRTMG cloud overlap updates

physics/GFS_rrtmg_pre.meta

@@ -70,51 +70,6 @@
   type = GFS_radtend_type
   intent = inout
   optional = F
-[f_ice]
-  standard_name = fraction_of_ice_water_cloud
-  long_name = fraction of ice water cloud
-  units = frac
-  dimensions = (horizontal_dimension,vertical_dimension)
-  type = real
-  kind = kind_phys
-  intent = in
-  optional = F
-[f_rain]
-  standard_name = fraction_of_rain_water_cloud
-  long_name = fraction of rain water cloud
-  units = frac
-  dimensions = (horizontal_dimension,vertical_dimension)
-  type = real
-  kind = kind_phys
-  intent = in
-  optional = F
-[f_rimef]
-  standard_name = rime_factor
-  long_name = rime factor
-  units = frac
-  dimensions = (horizontal_dimension,vertical_dimension)
-  type = real
-  kind = kind_phys
-  intent = in
-  optional = F
-[flgmin]
-  standard_name = minimum_large_ice_fraction
-  long_name = minimum large ice fraction in F-A mp scheme
-  units = frac
-  dimensions = (2)
-  type = real
-  kind = kind_phys
-  intent = in
-  optional = F
-[cwm]
-  standard_name = total_cloud_condensate_mixing_ratio_updated_by_physics
-  long_name = total cloud condensate mixing ratio (except water vapor) updated by physics
-  units = kg kg-1
-  dimensions = (horizontal_dimension,vertical_dimension)
-  type = real
-  kind = kind_phys
-  intent = out
-  optional = F
 [lm]
   standard_name = number_of_vertical_layers_for_radiation_calculations
   long_name = number of vertical layers for radiation calculation
@@ -270,22 +225,6 @@
   kind = kind_phys
   intent = out
   optional = F
-[imfdeepcnv]
-  standard_name = flag_for_mass_flux_deep_convection_scheme
-  long_name = flag for mass-flux deep convection scheme
-  units = flag
-  dimensions = ()
-  type = integer
-  intent = in
-  optional = F
-[imfdeepcnv_gf]
-  standard_name = flag_for_gf_deep_convection_scheme
-  long_name = flag for Grell-Freitas deep convection scheme
-  units = flag
-  dimensions = ()
-  type = integer
-  intent = in
-  optional = F
 [gasvmr_co2]
   standard_name = volume_mixing_ratio_co2
   long_name = CO2 volume mixing ratio
@@ -446,7 +385,7 @@
   dimensions = (horizontal_dimension,vertical_dimension)
   type = real
   kind = kind_phys
-  intent = inout
+  intent = out
   optional = F
 [clouds2]
   standard_name = cloud_liquid_water_path
@@ -455,7 +394,7 @@
   dimensions = (horizontal_dimension,vertical_dimension)
   type = real
   kind = kind_phys
-  intent = inout
+  intent = out
   optional = F
 [clouds3]
   standard_name = mean_effective_radius_for_liquid_cloud
@@ -464,7 +403,7 @@
   dimensions = (horizontal_dimension,vertical_dimension)
   type = real
   kind = kind_phys
-  intent = inout
+  intent = out
   optional = F
 [clouds4]
   standard_name = cloud_ice_water_path
@@ -473,7 +412,7 @@
   dimensions = (horizontal_dimension,vertical_dimension)
   type = real
   kind = kind_phys
-  intent = inout
+  intent = out
   optional = F
 [clouds5]
   standard_name = mean_effective_radius_for_ice_cloud
@@ -482,7 +421,7 @@
   dimensions = (horizontal_dimension,vertical_dimension)
   type = real
   kind = kind_phys
-  intent = inout
+  intent = out
   optional = F
 [clouds6]
   standard_name = cloud_rain_water_path
@@ -554,6 +493,15 @@
   kind = kind_phys
   intent = out
   optional = F
+[alpha]
+  standard_name = cloud_overlap_decorrelation_parameter
+  long_name = cloud overlap decorrelation parameter
+  units = frac
+  dimensions = (horizontal_dimension,adjusted_vertical_layer_dimension_for_radiation)
+  type = real
+  kind = kind_phys
+  intent = out
+  optional = F
 [alb1d]
   standard_name = surface_albedo_perturbation
   long_name = surface albedo perturbation

physics/physcons.F90

@@ -137,6 +137,9 @@ module physcons
   real(kind=kind_phys),parameter:: rhosnow    = 100._kind_phys                     !< density of snow (kg/m^3)
   real(kind=kind_phys),parameter:: rhoair     = 1.28_kind_phys                     !< density of air near surface (kg/m^3)
 
+! Decorrelation length constant (km) for iovrlw/iovrsw = 4 or 5 and idcor = 0
+  real(kind=kind_phys),parameter:: decorr_con = 2.50_kind_phys
+
 !........................................!
       end module physcons                !
 !========================================!

physics/physparam.f

@@ -234,28 +234,35 @@ module physparam
 !!\n =1:use maximum-random cloud overlapping method
 !!\n =2:use maximum cloud overlapping method
 !!\n =3:use decorrelation length overlapping method
+!!\n =4:use exponential overlapping method
+!!\n =5:use exponential-random overlapping method
 !!\n Opr GFS/CFS=1; see IOVR_SW in run scripts
-      integer, save :: iovrsw  = 1
+      integer, save :: iovrsw  = 5
 !> cloud overlapping control flag for LW
 !!\n =0:use random cloud overlapping method
 !!\n =1:use maximum-random cloud overlapping method
 !!\n =2:use maximum cloud overlapping method
 !!\n =3:use decorrelation length overlapping method
+!!\n =4:use exponential overlapping method
+!!\n =5:use exponential-random overlapping method
 !!\n Opr GFS/CFS=1; see IOVR_LW in run scripts
-      integer, save :: iovrlw  = 1
-
+      integer, save :: iovrlw  = 5
+!!\n Decorrelation length type for iovrlw/iovrsw = 4 or 5
+!!\n =0:use constant decorrelation length defined by decorr_con (in module physcons)
+!!\n =1:use day of year and latitude-varying decorrelation length
+      integer, save :: idcor   = 1
 !> sub-column cloud approx flag in SW radiation
 !!\n =0:no McICA approximation in SW radiation
 !!\n =1:use McICA with precribed permutation seeds (test mode)
 !!\n =2:use McICA with randomly generated permutation seeds
 !!\n Opr GFS/CFS=2; see ISUBC_SW in run scripts
-      integer, save :: isubcsw = 0
+      integer, save :: isubcsw = 2
 !> sub-column cloud approx flag in LW radiation
 !!\n =0:no McICA approximation in LW radiation
 !!\n =1:use McICA with prescribed permutation seeds (test mode)
 !!\n =2:use McICA with randomly generatedo
 !!\n Opr GFS/CFS=2; see ISUBC_LW in run scripts
-      integer, save :: isubclw = 0
+      integer, save :: isubclw = 2
 
 !> eliminating CRICK control flag
       logical, save :: lcrick  =.false.