Changeset 1620 for LMDZ5/trunk/libf/dyn3d

Timestamp:

Apr 4, 2012, 12:14:59 PM (12 years ago)

Author:

lguez

Message:

In procedure "disvert", the values of "sig" are now chosen according
to the value of "vert_sampling". "ok_strato" no longer appears in
"disvert". The analytical formula that was used when "ok_strato" was
true in "disvert" is now selected when "vert_sampling" is set to
"strato". Motivation: we can now read values of "sig" instead of
using this analytical formula, even when "ok_strato" is true.

Default value of "vert_sampling" with llm=39 gives the vertical
distribution of CMIP5 simulations.

File:

• LMDZ5/trunk/libf/dyn3d/disvert.F90 (modified) (4 diffs)

LMDZ5/trunk/libf/dyn3d/disvert.F90

@@ -4 +4 @@
 
   ! Auteur : P. Le Van
+
+  use new_unit_m, only: new_unit
+  use ioipsl, only: getin
 
   IMPLICIT NONE
@@ -26 +29 @@
   real zk, zkm1, dzk1, dzk2, k0, k1
 
-  INTEGER l
+  INTEGER l, unit
   REAL dsigmin
   REAL alpha, beta, deltaz
-  INTEGER iostat
   REAL x
   character(len=*),parameter :: modname="disvert"
 
+  character(len=6):: vert_sampling
+  ! (allowed values are "param", "tropo", "strato" and "read")
+
   !-----------------------------------------------------------------------
+
+  print *, "Call sequence information: disvert"
 
   ! default scaleheight is 8km for earth
   scaleheight=8.
 
-  OPEN(99, file='sigma.def', status='old', form='formatted', iostat=iostat)
+  vert_sampling = "strato" ! default value
+  call getin('vert_sampling', vert_sampling)
+  print *, 'vert_sampling = ' // vert_sampling
 
-  IF (iostat == 0) THEN
-     ! cas 1 on lit les options dans sigma.def:
+  select case (vert_sampling)
+  case ("param")
+     ! On lit les options dans sigma.def:
+     OPEN(99, file='sigma.def', status='old', form='formatted')
      READ(99, *) scaleheight ! hauteur d'echelle 8.
      READ(99, *) deltaz ! epaiseur de la premiere couche 0.04
@@ -68 +79 @@
 
      sig(llm+1)=0.
-
-     DO l = 1, llm
-        dsig(l) = sig(l)-sig(l+1)
-     end DO
-  ELSE
-     if (ok_strato) then
-        if (llm==39) then
-           dsigmin=0.3
-        else if (llm==50) then
-           dsigmin=1.
-        else
-           write(lunout,*) trim(modname), &
-           ' ATTENTION discretisation z a ajuster'
-           dsigmin=1.
-        endif
-        write(lunout,*) trim(modname), &
-        ' Discretisation verticale DSIGMIN=',dsigmin
-     endif
-
+  case("tropo")
      DO l = 1, llm
         x = 2*asin(1.) * (l - 0.5) / (llm + 1)
-
-        IF (ok_strato) THEN
-           dsig(l) =(dsigmin + 7. * SIN(x)**2) &
-                *(0.5*(1.-tanh(1.*(x-asin(1.))/asin(1.))))**2
-        ELSE
-           dsig(l) = 1.0 + 7.0 * SIN(x)**2
-        ENDIF
+        dsig(l) = 1.0 + 7.0 * SIN(x)**2
      ENDDO
      dsig = dsig / sum(dsig)
@@ -102 +89 @@
         sig(l) = sig(l+1) + dsig(l)
      ENDDO
-  ENDIF
+  case("strato")
+     if (llm==39) then
+        dsigmin=0.3
+     else if (llm==50) then
+        dsigmin=1.
+     else
+        write(lunout,*) trim(modname), ' ATTENTION discretisation z a ajuster'
+        dsigmin=1.
+     endif
+     WRITE(LUNOUT,*) trim(modname), 'Discretisation verticale DSIGMIN=',dsigmin
+
+     DO l = 1, llm
+        x = 2*asin(1.) * (l - 0.5) / (llm + 1)
+        dsig(l) =(dsigmin + 7. * SIN(x)**2) &
+             *(0.5*(1.-tanh(1.*(x-asin(1.))/asin(1.))))**2
+     ENDDO
+     dsig = dsig / sum(dsig)
+     sig(llm+1) = 0.
+     DO l = llm, 1, -1
+        sig(l) = sig(l+1) + dsig(l)
+     ENDDO
+  case("read")
+     call new_unit(unit)
+     open(unit, file="hybrid.txt", status="old", action="read", &
+          position="rewind")
+     read(unit, fmt=*) ! skip title line
+     do l = 1, llm + 1
+        read(unit, fmt=*) sig(l)
+     end do
+     close(unit)
+  case default
+     call abort_gcm("disvert", 'Wrong value for "vert_sampling"', 1)
+  END select
 
   DO l=1, llm