Changeset 5184 for branches/2015/dev_r5171_CNRS_LIM3_seaicebgc/NEMOGCM/NEMO/TOP_SRC/TRP

Timestamp:

2015-03-27T15:29:08+01:00 (9 years ago)

Author:

vancop

Message:

TOP ice routines

File:

• branches/2015/dev_r5171_CNRS_LIM3_seaicebgc/NEMOGCM/NEMO/TOP_SRC/TRP/trcsbc.F90 (modified) (4 diffs)

branches/2015/dev_r5171_CNRS_LIM3_seaicebgc/NEMOGCM/NEMO/TOP_SRC/TRP/trcsbc.F90

@@ -21 +21 @@
    USE trd_oce
    USE trdtra
+   USE sbc_oce
+   USE dom_oce
 
    IMPLICIT NONE
@@ -60 +62 @@
       INTEGER, INTENT( in ) ::   kt          ! ocean time-step index
       !
-      INTEGER  ::   ji, jj, jn           ! dummy loop indices
-      REAL(wp) ::   zsrau, zse3t   ! temporary scalars
+      INTEGER  ::   ji, jj, jn                                     ! dummy loop indices
+      REAL(wp) ::   zsrau, zse3t                                   ! temporary scalars
+      REAL(wp) ::   zswitch, zftra, zcd, zdtra, ztfx, ztra, zeuler ! temporary scalars
       CHARACTER (len=22) :: charout
       REAL(wp), POINTER, DIMENSION(:,:  ) :: zsfx
       REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrtrd
+
       !!---------------------------------------------------------------------
       !
@@ -72 +76 @@
                       CALL wrk_alloc( jpi, jpj,      zsfx   )
       IF( l_trdtrc )  CALL wrk_alloc( jpi, jpj, jpk, ztrtrd )
+
+      SELECT CASE( nn_ice_embd )         ! levitating or embedded sea-ice option
+         CASE( 0    )   ;   zswitch = 1  ! (0) standard levitating sea-ice : salt exchange only
+         CASE( 1, 2 )   ;   zswitch = 0  ! (1) levitating sea-ice: salt and volume exchange but no pressure effect                                
+                                         ! (2) embedded sea-ice : salt and volume fluxes and pressure
+      END SELECT
 
       IF( kt == nittrc000 ) THEN
@@ -91 +101 @@
       ! 0. initialization
       zsrau = 1. / rau0
+
+      zeuler = 1.   ;  IF ( neuler .EQ. 0 ) zeuler = 0.
+
       DO jn = 1, jptra
          !
          IF( l_trdtrc ) ztrtrd(:,:,:) = tra(:,:,:,jn)  ! save trends
          !                                             ! add the trend to the general tracer trend
-         DO jj = 2, jpj
-            DO ji = fs_2, fs_jpim1   ! vector opt.
-               zse3t = 1. / fse3t(ji,jj,1)
-               tra(ji,jj,1,jn) = tra(ji,jj,1,jn) + zsfx(ji,jj) *  zsrau * trn(ji,jj,1,jn) * zse3t
+
+         IF ( nn_ice_tr == -1 ) THEN  ! identical concentrations in ice and ocean (old code)
+
+            DO jj = 2, jpj
+               DO ji = fs_2, fs_jpim1   ! vector opt.
+                  zse3t = 1. / fse3t(ji,jj,1)
+                  tra(ji,jj,1,jn) = tra(ji,jj,1,jn) + zsfx(ji,jj) *  zsrau * trn(ji,jj,1,jn) * zse3t
+               END DO
             END DO
-         END DO
+
+         ELSE
+
+            DO jj = 2, jpj
+               DO ji = fs_2, fs_jpim1   ! vector opt.
+   
+                  zse3t = 1. / fse3t(ji,jj,1)
+                  
+                  ! tracer flux at the ice/ocean interface (tracer/m2/s)
+                  zftra = - trc_i(ji,jj,jn) * fmmflx(ji,jj) ! uptake of tracer in the sea ice
+                  zcd   =   trc_o(ji,jj,jn) * fmmflx(ji,jj) ! concentration dilution due to freezing-melting,
+                                                               ! only used in the levitating sea ice case
+                  ! tracer flux only       : add concentration dilution term in net tracer flux, no F-M in volume flux
+                  ! tracer and mass fluxes : no concentration dilution term in net tracer flux, F-M term in volume flux
+                  ztfx  = zftra + zswitch * zcd                ! net tracer flux (+C/D if no ice/ocean mass exchange)
+   
+                  ! tracer change (left member: euler; right member:leapfrog)
+                  ztra = ( 1. - zeuler ) * trn(ji,jj,1,jn) + zeuler * trb(ji,jj,1,jn)
+                  
+                  ! MAX is there to avoid integral ocean uptake in the case of freezing (for iron)
+                  zdtra = MAX ( - ztra / r2dtra(1) , zsrau * ( ztfx + zsfx(ji,jj) * trn(ji,jj,1,jn) ) * zse3t ) ! tracer tendency
+                  ! r2dtra is time step
+                  tra(ji,jj,1,jn) = tra(ji,jj,1,jn) + zdtra ! new line
+   
+   !              IF ( ztfx .NE. 0.0 ) THEN
+   !                  WRITE(numout,*) ji, jj, jn
+   !                  WRITE(numout,*) ' trc_o  : ', trc_o(ji,jj,jn)
+   !                  WRITE(numout,*) ' trc_i  : ', trc_i(ji,jj,jn)
+   !                  WRITE(numout,*) ' fmmflx : ', fmmflx(ji,jj)
+   !                  WRITE(numout,*) ' zswitch: ', zswitch
+   !                  WRITE(numout,*) ' zcd   : ', zcd
+   !                  WRITE(numout,*) ' zftra : ', zftra
+   !                  WRITE(numout,*) ' ztfx  : ', ztfx
+   !                  WRITE(numout,*) ' zsrau : ', zsrau
+   !                  WRITE(numout,*) ' zsfx  : ', zsfx(ji,jj)
+   !                  WRITE(numout,*) ' zse3t : ', zse3t
+   !                  WRITE(numout,*) ' ztra  : ', ztra
+   !                  WRITE(numout,*) ' zdtra : ', zdtra
+   !                  WRITE(numout,*) ' Old tendency : ', zsfx(ji,jj) * zsrau * trn(ji,jj,1,jn) * zse3t
+   !              ENDIF
+   
+               END DO
+            END DO
+   
+         ENDIF
          
          IF( l_trdtrc ) THEN