Changeset 2889

Timestamp:

May 23, 2017, 3:49:54 PM (8 years ago)

Author:

dcugnet

Message:

Change of behaviour for ce0l:

• The time interpolation of AMIP mid-month boundary conditions datasets (corresponding ce0l standard files/variables names: "amipbc_sst_1x1.bnc/tosbcs", "amipbc_sic_1x1.nc/sicbcs") is no longer using splines, but is now linear. See ​https://pcmdi.llnl.gov/mips/amip/details
• New ce0l standard files/variables names "amib_sst_1x1.nc/sst", "amip_sic_1x1.nc/sic" are introduced to allow splines time interpolation with monthly mean observations if needed (not adviced).

Note that splines time interpolation is still used for other fields "BILS", "ALB", "RUG"
and other cases ("amip_sst_1x1.nc" "cpl_atm_sst.nc" "histmth_sst.nc" "sstk.nc" for SST).

File:

• LMDZ5/trunk/libf/dynphy_lonlat/phylmd/limit_netcdf.F90 (modified) (10 diffs)

LMDZ5/trunk/libf/dynphy_lonlat/phylmd/limit_netcdf.F90

@@ -28 +28 @@
 
   CHARACTER(LEN=20), PARAMETER :: &
-  fsst(4)=['amipbc_sst_1x1.nc   ','cpl_atm_sst.nc      ','histmth_sst.nc      '&
-          ,'sstk.nc             ']
+  fsst(5)=['amipbc_sst_1x1.nc   ','amip_sst_1x1.nc     ','cpl_atm_sst.nc      '&
+          ,'histmth_sst.nc      ','sstk.nc             ']
   CHARACTER(LEN=20), PARAMETER :: &
-  fsic(4)=['amipbc_sic_1x1.nc   ','cpl_atm_sic.nc      ','histmth_sic.nc      '&
-          ,'ci.nc               ']
+  fsic(5)=['amipbc_sic_1x1.nc   ','amip_sic_1x1.nc     ','cpl_atm_sic.nc      '&
+          ,'histmth_sic.nc      ','ci.nc               ']
   CHARACTER(LEN=10), PARAMETER :: &
-  vsst(4)=['tosbcs    ','SISUTESW  ','tsol_oce  ','sstk      '], &
-  vsic(4)=['sicbcs    ','SIICECOV  ','pourc_sic ','ci        ']
+  vsst(5)=['tosbcs    ','tos       ','SISUTESW  ','tsol_oce  ','sstk      '],  &
+  vsic(5)=['sicbcs    ','sic       ','SIICECOV  ','pourc_sic ','ci        ']
   CHARACTER(LEN=10), PARAMETER :: &
   frugo='Rugos.nc  ', falbe='Albedo.nc ', frelf='Relief.nc ',    &
@@ -61 +61 @@
 !  *    12/2009: D. Cugnet   (f77->f90, calendars, files from coupled runs)
 !  *    04/2016: D. Cugnet   (12/14 recs SST/SIC files: cyclic/interannual runs)
+!  *    05/2017: D. Cugnet   (linear time interpolation for BCS files)
 !-------------------------------------------------------------------------------
 #ifndef CPP_1D
@@ -102 +103 @@
   INTEGER :: NF90_FORMAT
   INTEGER :: ndays                   !--- Depending on the output calendar
+  CHARACTER(LEN=256) :: str
 
 !--- INITIALIZATIONS -----------------------------------------------------------
@@ -158 +160 @@
      pctsrf_t(:,is_lic,k)=pctsrf(:,is_lic)       ! land ice
      SELECT CASE(ix_sic)
-        CASE(2)                                   ! SIC=pICE*(1-LIC-TER) (CPL)
+        CASE(3)                                   ! SIC=pICE*(1-LIC-TER) (CPL)
         pctsrf_t(:,is_sic,k)=fi_ice(:)*(1.-pctsrf(:,is_lic)-pctsrf(:,is_ter))
-        CASE(3)                                   ! SIC=pICE            (HIST)
+        CASE(4)                                   ! SIC=pICE            (HIST)
         pctsrf_t(:,is_sic,k)=fi_ice(:)
         CASE DEFAULT                              ! SIC=pICE-LIC   (AMIP,ERAI)
@@ -223 +225 @@
   CALL ncerr(NF90_CREATE(fnam,NF90_CLOBBER,nid),fnam)
   CALL ncerr(NF90_PUT_ATT(nid,NF90_GLOBAL,"title","Fichier conditions aux limites"),fnam)
+  str='File produced using ce0l executable.'
+  str=TRIM(str)//NEW_LINE(' ')//'Sea Ice Concentration built from'
+  SELECT CASE(ix_sic)
+    CASE(1); str=TRIM(str)//' Amip mid-month boundary condition (BCS).'
+    CASE(2); str=TRIM(str)//' Amip monthly mean observations.'
+    CASE(3); str=TRIM(str)//' IPSL coupled model outputs.'
+    CASE(4); str=TRIM(str)//' LMDZ model outputs.'
+    CASE(5); str=TRIM(str)//' ci.nc file.'
+  END SELECT
+  str=TRIM(str)//NEW_LINE(' ')//'Sea Surface Temperature built from'
+  SELECT CASE(ix_sst)
+    CASE(1); str=TRIM(str)//' Amip mid-month boundary condition (BCS).'
+    CASE(2); str=TRIM(str)//' Amip monthly mean observations.'
+    CASE(3); str=TRIM(str)//' IPSL coupled model outputs.'
+    CASE(4); str=TRIM(str)//' LMDZ model outputs.'
+    CASE(5); str=TRIM(str)//' sstk.nc file.'
+  END SELECT
+  CALL ncerr(NF90_PUT_ATT(nid,NF90_GLOBAL,"history",TRIM(str)),fnam)
 
   !--- Dimensions creation
@@ -348 +368 @@
   REAL, ALLOCATABLE :: work(:,:)          ! used for extrapolation
   CHARACTER(LEN=128):: title, mess        ! for messages
+  LOGICAL           :: is_bcs             ! flag for BCS data
   LOGICAL           :: extrp              ! flag for extrapolation
-  REAL              :: chmin, chmax
+  REAL              :: chmin, chmax, timeday, al
   INTEGER ierr, idx
   integer n_extrap ! number of extrapolated points
@@ -365 +386 @@
   END SELECT
   extrp=.FALSE.; IF(PRESENT(flag).AND.mode=='SST') extrp=flag
+  is_bcs=(mode=='SIC'.AND.ix_sic==1).OR.(mode=='SST'.AND.ix_sst==1)
   idx=INDEX(fnam,'.nc')-1
 
@@ -442 +464 @@
     CALL ncerr(NF90_GET_VAR(ncid,varid,champ,[1,1,l],[imdep,jmdep,1]),fnam)
     !--- Check whether values are acceptable for SIC, depending on unit.
-    IF(mode=='SIC') THEN
+    !--- Dropped for mid-month boundary conditions datasets (BCS, ix_sic==1)
+    IF(mode=='SIC'.AND.ix_sic/=1) THEN
       IF(TRIM(unit_sic)=="1".OR.TRIM(unit_sic)=="1.0") THEN
         IF(ANY(champ>1.0+EPSFRA)) &
           CALL abort_physic('SIC','Found sea-ice fractions greater than 1.')
       ELSE IF(TRIM(unit_sic)=="X".OR.TRIM(unit_sic)=="%") THEN
-!        IF(ANY(champ>100.0+EPSFRA)) &
-!          CALL abort_physic('SIC','Found sea-ice percentages greater than 100.')
+        IF(ANY(champ>100.0+EPSFRA)) &
+          CALL abort_physic('SIC','Found sea-ice percentages greater than 100.')
         IF(MAXVAL(champ)< 1.01) &
           CALL abort_physic('SIC','All sea-ice percentages lower than 1.')
@@ -529 +552 @@
         WRITE(lunout, *)' Daily input file.'
      ELSE
-        WRITE(lunout, *)'TIME INTERPOLATION.'
+        IF(     is_bcs) WRITE(lunout, *)'LINEAR TIME INTERPOLATION.'
+        IF(.NOT.is_bcs) WRITE(lunout, *)'SPLINES TIME INTERPOLATION.'
         WRITE(lunout, *)' Input time vector: ', timeyear
         WRITE(lunout, *)' Output time vector from 0 to ', ndays-1
      END IF
   END IF
-  ALLOCATE(yder(lmdep+2), champan(iip1, jjp1, ndays))
-  IF(lmdep==ndays_in) THEN
+  ALLOCATE(champan(iip1, jjp1, ndays))
+
+  IF(lmdep==ndays_in) THEN  !--- DAILY DATA: NO     TIME INTERPOLATION
      champan(1:iim,:,:)=champtime
-  ELSE
+  ELSE IF(is_bcs) THEN      !--- BCS   DATA: LINEAR TIME INTERPOLATION
+    l=1
+    DO k=1, ndays
+      timeday = REAL((k-1)*ndays_in)/ndays
+      IF(timeyear(l+1)<timeday) l=l+1
+      al=(timeday-timeyear(l))/(timeyear(l+1)-timeyear(l))
+      DO j=1, jjp1
+        DO i=1, iim
+          champan(i,j,k) = champtime(i,j,l)+al*(champtime(i,j,l+1)-champtime(i,j,l))
+        END DO
+      END DO
+    END DO
+  ELSE                      !--- AVE   DATA: SPLINE TIME INTERPOLATION
      skip = .false.
      n_extrap = 0
+     ALLOCATE(yder(lmdep+2))
      DO j=1, jjp1
        DO i=1, iim
@@ -551 +589 @@
      END DO
      IF(n_extrap /= 0) WRITE(lunout,*) "get_2Dfield pchfe_95: n_extrap = ", n_extrap
+     DEALLOCATE(yder)
   END IF
   champan(iip1, :, :)=champan(1, :, :)
-  DEALLOCATE(yder, champtime, timeyear)
+  DEALLOCATE(champtime, timeyear)
 
 !--- Checking the result