Changeset 5357 for branches/2015/dev_r5218_CNRS17_coupling/NEMOGCM/NEMO/LIM_SRC_3/limsbc.F90

Timestamp:

2015-06-04T20:39:20+02:00 (9 years ago)

Author:

clem

Message:

LIM3: change the interface between the ice and atm for both coupled and forced modes. Some work still needs to be done to deal with sublimation in coupled mode.

File:

• branches/2015/dev_r5218_CNRS17_coupling/NEMOGCM/NEMO/LIM_SRC_3/limsbc.F90 (modified) (7 diffs)

branches/2015/dev_r5218_CNRS17_coupling/NEMOGCM/NEMO/LIM_SRC_3/limsbc.F90

@@ -94 +94 @@
       !!              - fr_i    : ice fraction
       !!              - tn_ice  : sea-ice surface temperature
-      !!              - alb_ice : sea-ice albedo (ln_cpl=T)
+      !!              - alb_ice : sea-ice albedo (only useful in coupled mode)
       !!
       !! References : Goosse, H. et al. 1996, Bul. Soc. Roy. Sc. Liege, 65, 87-90.
@@ -101 +101 @@
       !!              The ref should be Rousset et al., 2015
       !!---------------------------------------------------------------------
-      INTEGER, INTENT(in) ::   kt                                   ! number of iteration
-      INTEGER  ::   ji, jj, jl, jk                                  ! dummy loop indices
-      REAL(wp) ::   zemp                                            ! local scalars
-      REAL(wp) ::   zf_mass                                         ! Heat flux associated with mass exchange ice->ocean (W.m-2)
-      REAL(wp) ::   zfcm1                                           ! New solar flux received by the ocean
+      INTEGER, INTENT(in) ::   kt                                  ! number of iteration
+      INTEGER  ::   ji, jj, jl, jk                                 ! dummy loop indices
+      REAL(wp) ::   zqmass                                         ! Heat flux associated with mass exchange ice->ocean (W.m-2)
+      REAL(wp) ::   zqsr                                           ! New solar flux received by the ocean
       !
       REAL(wp), POINTER, DIMENSION(:,:,:) ::   zalb_cs, zalb_os     ! 2D/3D workspace
@@ -126 +125 @@
             !      heat flux at the ocean surface      !
             !------------------------------------------!
-            ! Solar heat flux reaching the ocean = zfcm1 (W.m-2) 
+            ! Solar heat flux reaching the ocean = zqsr (W.m-2) 
             !---------------------------------------------------
-            IF( ln_cpl ) THEN 
-               !!! LIM2 version zqsr = qsr_tot(ji,jj) + ( fstric(ji,jj) - qsr_ice(ji,jj,1) ) * ( 1.0 - pfrld(ji,jj) )
-               zfcm1 = qsr_tot(ji,jj)
-               DO jl = 1, jpl
-                  zfcm1 = zfcm1 + ( ftr_ice(ji,jj,jl) - qsr_ice(ji,jj,jl) ) * a_i_b(ji,jj,jl)
-               END DO
-            ELSE
-               !!! LIM2 version zqsr = pfrld(ji,jj) * qsr(ji,jj)  + ( 1.  - pfrld(ji,jj) ) * fstric(ji,jj)
-               zfcm1   = pfrld(ji,jj) * qsr(ji,jj)
-               DO jl = 1, jpl
-                  zfcm1   = zfcm1 + a_i_b(ji,jj,jl) * ftr_ice(ji,jj,jl)
-               END DO
-            ENDIF
+            zqsr = qsr_tot(ji,jj)
+            DO jl = 1, jpl
+               zqsr = zqsr - a_i_b(ji,jj,jl) * (  qsr_ice(ji,jj,jl) - ftr_ice(ji,jj,jl) ) 
+            END DO
 
             ! Total heat flux reaching the ocean = hfx_out (W.m-2) 
             !---------------------------------------------------
-            zf_mass        = hfx_thd(ji,jj) + hfx_dyn(ji,jj) + hfx_res(ji,jj) ! heat flux from snow is 0 (T=0 degC)
-            hfx_out(ji,jj) = hfx_out(ji,jj) + zf_mass + zfcm1
+            zqmass         = hfx_thd(ji,jj) + hfx_dyn(ji,jj) + hfx_res(ji,jj) ! heat flux from snow is 0 (T=0 degC)
+            hfx_out(ji,jj) = hfx_out(ji,jj) + zqmass + zqsr
 
             ! Add the residual from heat diffusion equation (W.m-2)
@@ -153 +143 @@
             ! New qsr and qns used to compute the oceanic heat flux at the next time step
             !---------------------------------------------------
-            qsr(ji,jj) = zfcm1                                      
-            qns(ji,jj) = hfx_out(ji,jj) - zfcm1              
+            qsr(ji,jj) = zqsr                                      
+            qns(ji,jj) = hfx_out(ji,jj) - zqsr              
 
             !------------------------------------------!
@@ -167 +157 @@
             !                     Even if i see Ice melting as a FW and SALT flux
             !        
-            !  computing freshwater exchanges at the ice/ocean interface
-            IF( ln_cpl ) THEN 
-                zemp =   emp_tot(ji,jj)                                    &   ! net mass flux over grid cell
-                   &   - emp_ice(ji,jj) * ( 1._wp - pfrld(ji,jj) )         &   ! minus the mass flux intercepted by sea ice
-                   &   + sprecip(ji,jj) * ( pfrld(ji,jj) - pfrld(ji,jj)**rn_betas )   !
-            ELSE
-               zemp =   emp(ji,jj)     *           pfrld(ji,jj)            &   ! evaporation over oceanic fraction
-                  &   - tprecip(ji,jj) * ( 1._wp - pfrld(ji,jj) )          &   ! all precipitation reach the ocean
-                  &   + sprecip(ji,jj) * ( 1._wp - pfrld(ji,jj)**rn_betas )       ! except solid precip intercepted by sea-ice
-            ENDIF
-
             ! mass flux from ice/ocean
             wfx_ice(ji,jj) = wfx_bog(ji,jj) + wfx_bom(ji,jj) + wfx_sum(ji,jj) + wfx_sni(ji,jj)   &
@@ -184 +163 @@
             ! mass flux at the ocean/ice interface
             fmmflx(ji,jj) = - ( wfx_ice(ji,jj) + wfx_snw(ji,jj) ) * r1_rdtice  ! F/M mass flux save at least for biogeochemical model
-            emp(ji,jj)    = zemp - wfx_ice(ji,jj) - wfx_snw(ji,jj)             ! mass flux + F/M mass flux (always ice/ocean mass exchange)
+            emp(ji,jj)    = emp_oce(ji,jj) - wfx_ice(ji,jj) - wfx_snw(ji,jj)   ! mass flux + F/M mass flux (always ice/ocean mass exchange)
             
          END DO
@@ -213 +192 @@
       tn_ice(:,:,:) = t_su(:,:,:)           ! Ice surface temperature                      
 
-      !------------------------------------------------!
-      !    Snow/ice albedo (only if sent to coupler)   !
-      !------------------------------------------------!
-      IF( ln_cpl ) THEN          ! coupled case
-
-            CALL wrk_alloc( jpi, jpj, jpl, zalb_cs, zalb_os )
-
-            CALL albedo_ice( t_su, ht_i, ht_s, zalb_cs, zalb_os )  ! cloud-sky and overcast-sky ice albedos
-
-            alb_ice(:,:,:) = ( 1. - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:)
-
-            CALL wrk_dealloc( jpi, jpj, jpl, zalb_cs, zalb_os )
-
-      ENDIF
+      !------------------------------------------------------------------------!
+      !    Snow/ice albedo (only if sent to coupler, useless in forced mode)   !
+      !------------------------------------------------------------------------!
+      CALL wrk_alloc( jpi, jpj, jpl, zalb_cs, zalb_os )    
+      CALL albedo_ice( t_su, ht_i, ht_s, zalb_cs, zalb_os )  ! cloud-sky and overcast-sky ice albedos
+      alb_ice(:,:,:) = ( 1. - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:)
+      CALL wrk_dealloc( jpi, jpj, jpl, zalb_cs, zalb_os )
 
       ! conservation test