Added number_of_gaussian angles to LW calculation.

bluefinweiwei · Jan 3, 2020 · 323e6f9 · 323e6f9
1 parent a564c8b
commit 323e6f9
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Showing 2 changed files with 27 additions and 6 deletions.
diff --git a/physics/GFS_rrtmgp_pre.F90 b/physics/GFS_rrtmgp_pre.F90
@@ -199,7 +199,8 @@ subroutine GFS_rrtmgp_pre_run (Model, Grid, Statein, Coupling, Radtend, Sfcprop,
     real(kind_phys),dimension(NCOL,Model%levs) :: vmr_o3, vmr_h2o, coldry, tem0, colamt
     real(kind_phys) :: es, qs, tem1, tem2
     real(kind_phys), dimension(ncol, NF_ALBD) :: sfcalb
-    real(kind_phys), dimension(ncol, Model%levs) :: qs_lay, q_lay, deltaZ, deltaP, o3_lay
+    real(kind_phys), dimension(ncol, Model%levs) :: qs_lay, q_lay, deltaZ, deltaP, o3_lay, p_lay_log
+    real(kind_phys), dimension(ncol, Model%levs+1) :: p_lev_log
     real(kind_phys), dimension(ncol, Model%levs, NF_VGAS) :: gas_vmr
     real(kind_phys), dimension(ncol, Model%levs, NF_CLDS) :: clouds
     real(kind_phys), dimension(ncol) ::  precipitableH2o
@@ -241,15 +242,35 @@ subroutine GFS_rrtmgp_pre_run (Model, Grid, Statein, Coupling, Radtend, Sfcprop,
 
     ! Temperature at layer-interfaces
     if (top_at_1) then
+       ! Log of pressure (used for temperature level interpolation)
+       p_lay_log             = log(p_lay)
+       p_lev_log(:,1)        = log(max(1.0e-6,p_lev(:,1)))
+       p_lev_log(:,2:iSFC+1) = log(p_lev(:,2:iSFC+1))
+       !
        t_lev(1:NCOL,1)      = t_lay(1:NCOL,iTOA)
-       t_lev(1:NCOL,2:iSFC) = (t_lay(1:NCOL,2:iSFC)+t_lay(1:NCOL,1:iSFC-1))/2._kind_phys
+       do iLay=2,iSFC
+          t_lev(1:nCol,iLay) = t_lay(1:nCol,iLay) + (t_lay(1:nCol,iLay-1)-t_lay(1:nCol,iLay)) * &
+               (p_lev_log(1:nCol,iLay)   - p_lay_log(1:nCol,iLay)) / &
+               (p_lay_log(1:nCol,iLay-1) - p_lay_log(1:nCol,iLay))
+       enddo
+       !t_lev(1:NCOL,2:iSFC) = (t_lay(1:NCOL,2:iSFC)+t_lay(1:NCOL,1:iSFC-1))/2._kind_phys
        t_lev(1:NCOL,iSFC+1) = Sfcprop%tsfc(1:NCOL)
     else
+       ! Log of pressure (used for temperature level interpolation)
+       p_lay_log             = log(p_lay)
+       p_lev_log(:,1)        = log(max(1.0e-6,p_lev(:,1)))
+       p_lev_log(:,2:iTOA+1) = log(p_lev(:,2:iTOA+1))
+       !
        t_lev(1:NCOL,1)      = Sfcprop%tsfc(1:NCOL)
-       t_lev(1:NCOL,2:iTOA) = (t_lay(1:NCOL,2:iTOA)+t_lay(1:NCOL,1:iTOA-1))/2._kind_phys
+       do iLay=2,iTOA
+          t_lev(1:nCol,iLay) = t_lay(1:nCol,iLay-1) + (t_lay(1:nCol,iLay)-t_lay(1:nCol,iLay-1)) * &
+               (p_lev_log(1:nCol,iLay)-p_lay_log(1:nCol,iLay-1)) / &
+               (p_lay_log(1:nCol,iLay)-p_lay_log(1:nCol,iLay-1))
+       enddo
+       !t_lev(1:NCOL,2:iTOA) = (t_lay(1:NCOL,2:iTOA)+t_lay(1:NCOL,1:iTOA-1))/2._kind_phys
        t_lev(1:NCOL,iTOA+1) = t_lay(1:NCOL,iTOA)
     endif
-    
+
     ! Compute layer pressure thicknes
     deltaP = abs(p_lev(:,2:model%levs+1)-p_lev(:,1:model%levs))
 

diff --git a/physics/rrtmgp_lw_rte.F90 b/physics/rrtmgp_lw_rte.F90
@@ -123,7 +123,7 @@ subroutine rrtmgp_lw_rte_run(doLWrad, nCol, nLev, p_lay, t_lay, p_lev, skt, lw_g
             top_at_1,                & ! IN  - veritcal ordering flag
             sources,                 & ! IN  - source function
             sfc_emiss_byband,        & ! IN  - surface emissivity in each LW band
-            flux_clrsky))
+            flux_clrsky,n_gauss_angles=3))
        ! Store fluxes
        fluxlwUP_clrsky   = sum(flux_clrsky%bnd_flux_up,dim=3)
        fluxlwDOWN_clrsky = sum(flux_clrsky%bnd_flux_dn,dim=3)
@@ -148,7 +148,7 @@ subroutine rrtmgp_lw_rte_run(doLWrad, nCol, nLev, p_lay, t_lay, p_lev, skt, lw_g
          top_at_1,                & ! IN  - veritcal ordering flag
          sources,                 & ! IN  - source function
          sfc_emiss_byband,        & ! IN  - surface emissivity in each LW band
-         flux_allsky))
+         flux_allsky,n_gauss_angles=3))
     ! Store fluxes
     fluxlwUP_allsky   = sum(flux_allsky%bnd_flux_up,dim=3)
     fluxlwDOWN_allsky = sum(flux_allsky%bnd_flux_dn,dim=3)