!
! $Id $
!
SUBROUTINE read_data_humidity(fichnom,iim_input,jjm_input,nlayer,timelen, nslope,q_h2o_GCM,q_co2_GCM,ps_GCM,tsurf_gcm)

      use netcdf, only: nf90_open,NF90_NOWRITE,nf90_noerr,nf90_strerror, &
                        nf90_get_var, nf90_inq_varid, nf90_inq_dimid, &
                        nf90_inquire_dimension,nf90_close
      use comsoil_h, only: nsoilmx

      IMPLICIT NONE

!=======================================================================
!
! Read initial confitions file to compute the ice table
!
!=======================================================================

  include "dimensions.h"

!===============================================================================
! Arguments:
  CHARACTER(LEN=*), INTENT(IN) :: fichnom          !--- FILE NAME

  INTEGER, INTENT(IN) :: iim_input,jjm_input,nlayer,nslope,timelen

! atmosphere

  REAL, INTENT(OUT) ::  q_h2o_GCM(iim_input+1,jjm_input+1,timelen)
  REAL, INTENT(OUT) ::  q_co2_GCM(iim_input+1,jjm_input+1,timelen)

  REAL,  INTENT(OUT) ::  ps_GCM(iim_input+1,jjm_input+1,timelen)


! Surface
  REAL ,INTENT(OUT) ::  tsurf_gcm(iim_input+1,jjm_input+1,nslope,timelen) ! Surface temperature of the concatenated file



!===============================================================================
!   Local Variables 
  CHARACTER(LEN=256) :: msg, var, modname
  INTEGER,PARAMETER :: length=100
  INTEGER :: iq, fID, vID, idecal
  INTEGER :: ierr
  CHARACTER(len=12) :: start_file_type="earth" ! default start file type

  REAL,ALLOCATABLE :: time(:) ! times stored in start
  INTEGER :: indextime ! index of selected time

  INTEGER :: edges(4),corner(4)
  INTEGER :: i,j,t
  real,save :: m_co2, m_noco2, A , B, mmean

  INTEGER :: islope
  CHARACTER*2 :: num


!-----------------------------------------------------------------------
  modname="pemetat0"

      m_co2 = 44.01E-3  ! CO2 molecular mass (kg/mol)   
      m_noco2 = 33.37E-3  ! Non condensible mol mass (kg/mol)   
      A =(1/m_co2 - 1/m_noco2)
      B=1/m_noco2

!  Open initial state NetCDF file
  var=fichnom
  CALL err(NF90_OPEN(var,NF90_NOWRITE,fID),"open",var)

  CALL get_var3("co2_cropped" ,q_co2_GCM)
  CALL get_var3("h2o_cropped" ,q_h2o_GCM)
  CALL get_var3("ps"   ,ps_GCM)


  DO islope=1,nslope
    write(num,fmt='(i2.2)') islope
    call get_var3("tsurf_slope"//num,tsurf_gcm(:,:,islope,:))
  ENDDO

  print *, "tsurf_slope"





  CONTAINS

SUBROUTINE check_dim(n1,n2,str1,str2)
  INTEGER,          INTENT(IN) :: n1, n2
  CHARACTER(LEN=*), INTENT(IN) :: str1, str2
  CHARACTER(LEN=256) :: s1, s2
  IF(n1/=n2) THEN
    s1='value of '//TRIM(str1)//' ='
    s2=' read in starting file differs from parametrized '//TRIM(str2)//' ='
    WRITE(msg,'(10x,a,i4,2x,a,i4)')TRIM(s1),n1,TRIM(s2),n2
    CALL ABORT_gcm(TRIM(modname),TRIM(msg),1)
  END IF
END SUBROUTINE check_dim


SUBROUTINE get_var1(var,v)
  CHARACTER(LEN=*), INTENT(IN)  :: var
  REAL,             INTENT(OUT) :: v(:)
  CALL err(NF90_INQ_VARID(fID,var,vID),"inq",var)
  CALL err(NF90_GET_VAR(fID,vID,v),"get",var)
END SUBROUTINE get_var1


SUBROUTINE get_var3(var,v) ! on U grid
  CHARACTER(LEN=*), INTENT(IN)  :: var
  REAL,             INTENT(OUT) :: v(:,:,:)
  CALL err(NF90_INQ_VARID(fID,var,vID),"inq",var)
  CALL err(NF90_GET_VAR(fID,vID,v),"get",var)

END SUBROUTINE get_var3

SUBROUTINE get_var4(var,v) 
  CHARACTER(LEN=*), INTENT(IN)  :: var
  REAL,             INTENT(OUT) :: v(:,:,:,:)
  CALL err(NF90_INQ_VARID(fID,var,vID),"inq",var)
  CALL err(NF90_GET_VAR(fID,vID,v),"get",var)
END SUBROUTINE get_var4

SUBROUTINE err(ierr,typ,nam)
  INTEGER,          INTENT(IN) :: ierr   !--- NetCDF ERROR CODE
  CHARACTER(LEN=*), INTENT(IN) :: typ    !--- TYPE OF OPERATION
  CHARACTER(LEN=*), INTENT(IN) :: nam    !--- FIELD/FILE NAME
  IF(ierr==NF90_NoERR) RETURN
  SELECT CASE(typ)
    CASE('inq');   msg="Field <"//TRIM(nam)//"> is missing"
    CASE('get');   msg="Reading failed for <"//TRIM(nam)//">"
    CASE('open');  msg="File opening failed for <"//TRIM(nam)//">"
    CASE('close'); msg="File closing failed for <"//TRIM(nam)//">"
  END SELECT
  CALL ABORT_gcm(TRIM(modname),TRIM(msg),ierr)
END SUBROUTINE err

END SUBROUTINE read_data_humidity