Changeset 2375 for LMDZ5/trunk/libf/dyn3d/leapfrog.F

Timestamp:

Oct 18, 2015, 8:38:58 AM (9 years ago)

Author:

Ehouarn Millour

Message:

Fix in the computation of the date; the convention is that it corresponds to the time at the end of the current dynamics or physics step (except when in backward Matsuno step where it remains unchanged as it was correctly updated during the forward part of the step).
Note that the relationship between itau and date is a bit tricky as itau is incremented between Matsuno forward and backward steps (and from a leapfrog step to the next) but unchanged from Matsuno bacward step to leapfrog step.
Because of change in date when calling physics, bench results will change with this revision.
EM

File:

• LMDZ5/trunk/libf/dyn3d/leapfrog.F (modified) (4 diffs)

LMDZ5/trunk/libf/dyn3d/leapfrog.F

@@ -228 +228 @@
    1  CONTINUE ! Matsuno Forward step begins here
 
+c   date: (NB: date remains unchanged for Backward step)
+c   -----
+
       jD_cur = jD_ref + day_ini - day_ref +                             &
-     &          itau/day_step
+     &          (itau+1)/day_step
       jH_cur = jH_ref + start_time +                                    &
-     &          mod(itau,day_step)/float(day_step) 
+     &          mod(itau+1,day_step)/float(day_step) 
       jD_cur = jD_cur + int(jH_cur)
       jH_cur = jH_cur - int(jH_cur)
@@ -277 +280 @@
 c-----------------------------------------------------------------------
 
-c   date:
+c   date: (NB: only leapfrog step requires recomputing date)
 c   -----
+
+      IF (leapf) THEN
+        jD_cur = jD_ref + day_ini - day_ref +
+     &            (itau+1)/day_step
+        jH_cur = jH_ref + start_time +
+     &            mod(itau+1,day_step)/float(day_step) 
+        jD_cur = jD_cur + int(jH_cur)
+        jH_cur = jH_cur - int(jH_cur)
+      ENDIF
 
 
@@ -416 +428 @@
 !     &              (itau * dtvr / daysec - int(itau * dtvr / daysec)) 
            jD_cur = jD_ref + day_ini - day_ref +                        &
-     &          itau/day_step
+     &          (itau+1)/day_step
 
            IF (planet_type .eq."generic") THEN
@@ -424 +436 @@
 
            jH_cur = jH_ref + start_time +                               &
-     &              mod(itau,day_step)/float(day_step) 
+     &              mod(itau+1,day_step)/float(day_step) 
            jD_cur = jD_cur + int(jH_cur)
            jH_cur = jH_cur - int(jH_cur)