| [1] | 1 | SUBROUTINE read_map2D(filename, varname, timestep, inverse, varout) |
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| 2 | ! Open file and read one variable for one timestep. |
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| 3 | ! Return variable for the given timestep. |
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| 4 | USE dimphy |
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| 5 | USE netcdf |
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| 6 | USE mod_grid_phy_lmdz |
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| 7 | USE mod_phys_lmdz_para |
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| 8 | |
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| 9 | |
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| 10 | IMPLICIT NONE |
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| 11 | |
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| 12 | ! Input arguments |
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| 13 | CHARACTER(len=20), INTENT(IN) :: filename ! name of file to read |
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| 14 | CHARACTER(len=20), INTENT(IN) :: varname ! name of variable in file |
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| 15 | INTEGER, INTENT(IN) :: timestep ! actual timestep |
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| 16 | LOGICAL, INTENT(IN) :: inverse ! TRUE if latitude needs to be inversed |
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| 17 | ! Output argument |
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| 18 | REAL, DIMENSION(klon), INTENT(OUT) :: varout ! The variable read from file for the given timestep |
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| 19 | |
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| 20 | ! Local variables |
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| 21 | INTEGER :: j |
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| 22 | INTEGER :: nid, nvarid, ierr |
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| 23 | INTEGER, DIMENSION(3) :: start, count |
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| 24 | CHARACTER(len=20) :: modname='read_map2D' |
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| 25 | |
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| 26 | REAL, DIMENSION(nbp_lon,nbp_lat) :: var_glo2D ! 2D global |
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| 27 | REAL, DIMENSION(nbp_lon,nbp_lat) :: var_glo2D_tmp ! 2D global |
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| 28 | REAL, DIMENSION(klon_glo) :: var_glo1D ! 1D global |
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| 29 | |
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| 30 | |
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| 31 | ! Read variable from file. Done by master process MPI and master thread OpenMP |
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| 32 | IF (is_mpi_root .AND. is_omp_root) THEN |
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| 33 | ierr = NF90_OPEN (filename, NF90_NOWRITE, nid) |
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| 34 | IF (ierr /= NF90_NOERR) CALL abort_gcm(modname,'Problem in opening file '//filename,1) |
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| 35 | |
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| 36 | ierr = NF90_INQ_VARID(nid, varname, nvarid) |
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| 37 | IF (ierr /= NF90_NOERR) CALL abort_gcm(modname, 'The variable '//varname//' is absent in file',1) |
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| 38 | |
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| 39 | start=(/1,1,timestep/) |
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| 40 | count=(/nbp_lon,nbp_lat,1/) |
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| 41 | ierr = NF90_GET_VAR(nid, nvarid, var_glo2D,start,count) |
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| 42 | IF (ierr /= NF90_NOERR) CALL abort_gcm(modname, 'Problem in reading varaiable '//varname,1) |
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| 43 | |
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| 44 | ! Inverse latitude order |
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| 45 | IF (inverse) THEN |
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| 46 | var_glo2D_tmp(:,:) = var_glo2D(:,:) |
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| 47 | DO j=1, nbp_lat |
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| 48 | var_glo2D(:,j) = var_glo2D_tmp(:,nbp_lat-j+1) |
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| 49 | END DO |
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| 50 | END IF |
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| 51 | |
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| 52 | ! Transform the global field from 2D to 1D |
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| 53 | CALL grid2Dto1D_glo(var_glo2D,var_glo1D) |
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| 54 | |
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| 55 | ENDIF |
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| 56 | |
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| 57 | ! Scatter gloabl 1D variable to all processes |
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| 58 | CALL scatter(var_glo1D, varout) |
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| 59 | |
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| 60 | END SUBROUTINE read_map2D |
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