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!!======================================================================
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!! *** PROGRAM cdfspice ***
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!!=====================================================================
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!! ** Purpose : Compute spiciness 3D field from gridT file
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!! Store the results on a 'similar' cdf file.
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!! ** Method : spiciness = sum(i=0,5)[sum(j=0,4)[b(i,j)*theta^i*(s-35)^j]]
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!! with: b -> coefficients
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!! theta -> potential temperature
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!! spice(15,33)= 0.5445863 0.544586321373410 calcul en double
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!! spice(15,33)= 0.5445864 (calcul en simple precision)
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!! ** References : Flament (2002) "A state variable for characterizing
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!! water masses and their diffusive stability: spiciness."
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!! Progress in Oceanography Volume 54, 2002, Pages 493-501.
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!! History : 2.1 : 03/2010 : C.O. Dufour : Original code
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!! 3.0 : 01/2011 : J.M. Molines : Doctor norm + Lic.
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!!----------------------------------------------------------------------
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!!----------------------------------------------------------------------
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!! CDFTOOLS_3.0 , MEOM 2011
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!! Copyright (c) 2011, J.-M. Molines
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!! Software governed by the CeCILL licence (Licence/CDFTOOLSCeCILL.txt)
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!!----------------------------------------------------------------------
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INTEGER(KIND=4) :: ji, jj, jk, jt ! dummy loop index
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INTEGER(KIND=4) :: ierr ! error status
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INTEGER(KIND=4) :: narg, iargc ! browse command line
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INTEGER(KIND=4) :: npiglo, npjglo ! size of the domain
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INTEGER(KIND=4) :: npk, npt ! size of the domain
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INTEGER(KIND=4) :: ncout ! ncid of output file
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INTEGER(KIND=4), DIMENSION(1) :: ipk, id_varout ! level and varid's
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REAL(KIND=4) :: zspval ! missing value
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REAL(KIND=4), DIMENSION(:), ALLOCATABLE :: tim ! time counter
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REAL(KIND=8), DIMENSION(:,:), ALLOCATABLE :: dtemp ! temperature
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REAL(KIND=8), DIMENSION(:,:), ALLOCATABLE :: dtempt ! temperature
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REAL(KIND=8), DIMENSION(:,:), ALLOCATABLE :: dsal ! salinity
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REAL(KIND=8), DIMENSION(:,:), ALLOCATABLE :: dsalt ! salinity
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REAL(KIND=8), DIMENSION(:,:), ALLOCATABLE :: dsalref ! reference salinity
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REAL(KIND=8), DIMENSION(:,:), ALLOCATABLE :: dspi ! spiceness
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REAL(KIND=8), DIMENSION(:,:), ALLOCATABLE :: dmask ! 2D mask at current level
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REAL(KIND=8), DIMENSION(6,5) :: dbet ! coefficients of spiciness formula
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CHARACTER(LEN=256) :: cf_tfil ! input filename
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CHARACTER(LEN=256) :: cf_out='spice.nc' ! output file name
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TYPE (variable), DIMENSION(1) :: stypvar ! structure for attributes
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!!----------------------------------------------------------------------
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PRINT *,' usage : cdfspice T-file '
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PRINT *,' Compute the spiceness corresponding to temperatures and salinities'
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PRINT *,' given in the input file.'
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PRINT *,' spiciness = sum(i=0,5)[sum(j=0,4)[b(i,j)*theta^i*(s-35)^j]]'
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PRINT *,' with: b -> coefficients'
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PRINT *,' theta -> potential temperature'
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PRINT *,' s -> salinity'
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PRINT *,' ARGUMENTS :'
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PRINT *,' T-file : netcdf file with temperature and salinity (gridT)'
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PRINT *,' REQUIRED FILES :'
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PRINT *,' netcdf file : ', TRIM(cf_out)
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PRINT *,' variables : vospice'
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PRINT *,' REFERENCE :'
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PRINT *,' Flament (2002) "A state variable for characterizing '
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PRINT *,' water masses and their diffusive stability: spiciness."'
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PRINT *,' Progress in Oceanography Volume 54, 2002, Pages 493-501.'
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PRINT *,'usage : cdfspice gridT '
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PRINT *,' Output on spice.nc, variable vospice'
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CALL getarg (1, cf_tfil)
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IF ( chkfile(cf_tfil) ) STOP ! missing files
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npiglo = getdim (cf_tfil,cn_x)
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npjglo = getdim (cf_tfil,cn_y)
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npk = getdim (cf_tfil,cn_z)
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npt = getdim (cf_tfil,cn_t)
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stypvar(1)%cname = 'vospice'
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stypvar(1)%cunits = 'kg/m3'
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stypvar(1)%rmissing_value = 0.
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stypvar(1)%valid_min = -300.
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stypvar(1)%valid_max = 300.
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stypvar(1)%clong_name = 'spiciness'
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stypvar(1)%cshort_name = 'vospice'
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stypvar(1)%conline_operation = 'N/A'
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stypvar(1)%caxis = 'TZYX'
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PRINT *, 'npiglo = ', npiglo
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PRINT *, 'npjglo = ', npjglo
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PRINT *, 'npk = ', npk
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PRINT *, 'npt = ', npt
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ALLOCATE (dtemp(npiglo,npjglo), dsal (npiglo,npjglo) )
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ALLOCATE (dspi( npiglo,npjglo), dmask(npiglo,npjglo) )
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ALLOCATE (dtempt(npiglo,npjglo), dsalt(npiglo,npjglo))
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ALLOCATE (dsalref(npiglo,npjglo))
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! create output fileset
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ncout = create (cf_out, cf_tfil, npiglo, npjglo, npk )
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ierr = createvar (ncout, stypvar, 1, ipk, id_varout )
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ierr = putheadervar(ncout, cf_tfil, npiglo, npjglo, npk )
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tim = getvar1d(cf_tfil, cn_vtimec, npt )
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ierr = putvar1d(ncout, tim, npt, 'T')
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zspval = getatt(cf_tfil, cn_vosaline, 'missing_value')
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! Define coefficients to compute spiciness (R*8)
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dbet(1,1) = 0 ; dbet(1,2) = 7.7442d-01 ; dbet(1,3) = -5.85d-03 ; dbet(1,4) = -9.84d-04 ; dbet(1,5) = -2.06d-04
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dbet(2,1) = 5.1655d-02 ; dbet(2,2) = 2.034d-03 ; dbet(2,3) = -2.742d-04 ; dbet(2,4) = -8.5d-06 ; dbet(2,5) = 1.36d-05
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dbet(3,1) = 6.64783d-03 ; dbet(3,2) = -2.4681d-04 ; dbet(3,3) = -1.428d-05 ; dbet(3,4) = 3.337d-05 ; dbet(3,5) = 7.894d-06
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dbet(4,1) = -5.4023d-05 ; dbet(4,2) = 7.326d-06 ; dbet(4,3) = 7.0036d-06 ; dbet(4,4) = -3.0412d-06 ; dbet(4,5) = -1.0853d-06
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dbet(5,1) = 3.949d-07 ; dbet(5,2) = -3.029d-08 ; dbet(5,3) = -3.8209d-07 ; dbet(5,4) = 1.0012d-07 ; dbet(5,5) = 4.7133d-08
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dbet(6,1) = -6.36d-10 ; dbet(6,2) = -1.309d-09 ; dbet(6,3) = 6.048d-09 ; dbet(6,4) = -1.1409d-09 ; dbet(6,5) = -6.676d-10
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PRINT *,' TIME = ', jt, tim(jt)/86400.,' days'
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dtemp(:,:) = getvar(cf_tfil, cn_votemper, jk, npiglo, npjglo, ktime=jt)
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dsal( :,:) = getvar(cf_tfil, cn_vosaline, jk, npiglo, npjglo, ktime=jt)
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WHERE(dsal == zspval ) dmask = 0
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! spiciness at time jt, at level jk
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dsalref(:,:) = dsal(:,:) - 35.d0
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dspi( :,:) = dspi (:,:) + dbet (ji,jj) * dtempt(:,:) * dsalt(:,:)
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dsalt(:,:) = dsalt(:,:) * dsalref( :,: )
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dtempt(:,:) = dtempt(:,:) * dtemp(:,:)
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ierr = putvar(ncout, id_varout(1), REAL(dspi*dmask), jk, npiglo, npjglo, ktime=jt)
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END DO ! loop to next level
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END DO ! next time frame
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ierr = closeout(ncout)
added
removed
cdfspice.f90
