Changeset 12489 for NEMO/trunk/src/OCE/IOM/restart.F90

Timestamp:

2020-02-28T16:55:11+01:00 (4 years ago)

Author:

davestorkey

Message:

Preparation for new timestepping scheme #2390.
Main changes:

1. Initial euler timestep now handled in stp and not in TRA/DYN routines.
2. Renaming of all timestep parameters. In summary, the namelist parameter is now rn_Dt and the current timestep is rDt (and rDt_ice, rDt_trc etc).
3. Renaming of a few miscellaneous parameters, eg. atfp -> rn_atfp (namelist parameter used everywhere) and rau0 -> rho0.

This version gives bit-comparable results to the previous version of the trunk.

File:

• NEMO/trunk/src/OCE/IOM/restart.F90 (modified) (5 diffs)

NEMO/trunk/src/OCE/IOM/restart.F90

@@ -144 +144 @@
       !!----------------------------------------------------------------------
                      IF(lwxios) CALL iom_swap(      cwxios_context          )
-                     CALL iom_rstput( kt, nitrst, numrow, 'rdt'    , rdt       , ldxios = lwxios)   ! dynamics time step
+                     CALL iom_rstput( kt, nitrst, numrow, 'rdt'    , rn_Dt       , ldxios = lwxios)   ! dynamics time step
                      CALL iom_delay_rst( 'WRITE', 'OCE', numrow )   ! save only ocean delayed global communication variables
 
@@ -247 +247 @@
       IF( iom_varid( numror, 'rdt', ldstop = .FALSE. ) > 0 )   THEN
          CALL iom_get( numror, 'rdt', zrdt, ldxios = lrxios )
-         IF( zrdt /= rdt )   neuler = 0
+         IF( zrdt /= rn_Dt ) THEN
+            IF(lwp) WRITE( numout,*)
+            IF(lwp) WRITE( numout,*) 'rst_read:  rdt not equal to the read one'
+            IF(lwp) WRITE( numout,*)
+            IF(lwp) WRITE( numout,*) '      ==>>>   forced euler first time-step'
+            l_1st_euler =  .TRUE.
+         ENDIF
       ENDIF
 
@@ -256 +262 @@
       IF ( ln_diurnal_only ) THEN 
          IF(lwp) WRITE( numout, * ) &
-         &   "rst_read:- ln_diurnal_only set, setting rhop=rau0" 
-         rhop = rau0
+         &   "rst_read:- ln_diurnal_only set, setting rhop=rho0" 
+         rhop = rho0
          CALL iom_get( numror, jpdom_autoglo, 'tn'     , w3d, ldxios = lrxios ) 
          ts(:,:,1,jp_tem,Kmm) = w3d(:,:,1)
@@ -270 +276 @@
          CALL iom_get( numror, jpdom_autoglo, 'sshb'   ,ssh(:,:         ,Kbb), ldxios = lrxios )
       ELSE
-         neuler = 0
+         l_1st_euler =  .TRUE.      ! before field not found, forced euler 1st time-step
       ENDIF
       !
@@ -284 +290 @@
       ENDIF
       !
-      IF( neuler == 0 ) THEN                                  ! Euler restart (neuler=0)
+      IF( l_1st_euler ) THEN                                  ! Euler restart 
          ts   (:,:,:,:,Kbb) = ts   (:,:,:,:,Kmm)              ! all before fields set to now values
          uu   (:,:,:  ,Kbb) = uu   (:,:,:  ,Kmm)