Changeset 12489 for NEMO/trunk/src/TOP/trcstp.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/TOP/trcstp.F90 (modified) (5 diffs)

NEMO/trunk/src/TOP/trcstp.F90

@@ -64 +64 @@
       IF( ln_timing )   CALL timing_start('trc_stp')
       !
-      IF( ( neuler == 0 .AND. kt == nittrc000 ) .OR. ln_top_euler ) THEN     ! at nittrc000
-         r2dttrc =  rdttrc           ! = rdttrc (use or restarting with Euler time stepping)
+      IF( l_1st_euler .OR. ln_top_euler ) THEN     ! at nittrc000
+         rDt_trc =  rn_Dt           ! = rn_Dt (use or restarting with Euler time stepping)
       ELSEIF( kt <= nittrc000 + 1 ) THEN                                     ! at nittrc000 or nittrc000+1 
-         r2dttrc = 2. * rdttrc       ! = 2 rdttrc (leapfrog) 
+         rDt_trc = 2. * rn_Dt       ! = 2 rn_Dt (leapfrog) 
       ENDIF
       !
@@ -177 +177 @@
             nb_rec_per_day = ncpl_qsr_freq
          ELSE  
-            rdt_sampl = MAX( 3600., rdttrc )
+            rdt_sampl = MAX( 3600., rn_Dt )
             nb_rec_per_day = INT( rday / rdt_sampl )
          ENDIF
@@ -196 +196 @@
 
             CALL iom_get( numrtr, 'ktdcy', zkt )  
-            rsecfst = INT( zkt ) * rdttrc
+            rsecfst = INT( zkt ) * rn_Dt
             IF(lwp) WRITE(numout,*) 'trc_qsr_mean:   qsr_mean read in the restart file at time-step rsecfst =', rsecfst, ' s '
             CALL iom_get( numrtr, jpdom_autoglo, 'qsr_mean', qsr_mean )   !  A mean of qsr
@@ -217 +217 @@
          ELSE                                         !* no restart: set from nit000 values
             IF(lwp) WRITE(numout,*) 'trc_qsr_mean:   qsr_mean set to nit000 values'
-            rsecfst  = kt * rdttrc
+            rsecfst  = kt * rn_Dt
             !
             qsr_mean(:,:) = qsr(:,:)
@@ -227 +227 @@
       ENDIF
       !
-      rseclast = kt * rdttrc
+      rseclast = kt * rn_Dt
       !
       llnew   = ( rseclast - rsecfst ) .ge.  rdt_sampl    !   new shortwave to store