[11395] | 1 | MODULE isfparmlt |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE sbcisf *** |
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| 4 | !! Surface module : update surface ocean boundary condition under ice |
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| 5 | !! shelf |
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| 6 | !!====================================================================== |
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| 7 | !! History : 4.0 ! original code |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | |
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| 10 | USE oce ! ocean dynamics and tracers |
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| 11 | USE isf |
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| 12 | USE isftbl |
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| 13 | USE dom_oce ! ocean space and time domain |
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| 14 | USE phycst ! physical constants |
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| 15 | USE eosbn2 ! equation of state |
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| 16 | |
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| 17 | USE in_out_manager ! I/O manager |
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| 18 | USE iom ! I/O library |
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| 19 | USE fldread |
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| 20 | |
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| 21 | IMPLICIT NONE |
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| 22 | |
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| 23 | PRIVATE |
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| 24 | |
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| 25 | PUBLIC isfpar_mlt |
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| 26 | |
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| 27 | !!---------------------------------------------------------------------- |
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| 28 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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| 29 | !! $Id: sbcisf.F90 10536 2019-01-16 19:21:09Z mathiot $ |
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| 30 | !! Software governed by the CeCILL license (see ./LICENSE) |
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| 31 | !!---------------------------------------------------------------------- |
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| 32 | CONTAINS |
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| 33 | |
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| 34 | ! ------------------------------------------------------------------------------------------------------- |
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| 35 | ! -------------------------------- PUBLIC SUBROUTINE ---------------------------------------------------- |
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| 36 | ! ------------------------------------------------------------------------------------------------------- |
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| 37 | |
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| 38 | SUBROUTINE isfpar_mlt( kt, pqfwf, pqoce, pqhc ) |
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| 39 | !!--------------------------------------------------------------------- |
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| 40 | !! *** ROUTINE sbc_isf *** |
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| 41 | !! |
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| 42 | !! ** Purpose : Compute Salt and Heat fluxes related to ice_shelf |
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| 43 | !! melting and freezing |
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| 44 | !! |
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| 45 | !! ** Method : 2 parameterizations are available according to XXXXX |
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| 46 | !! 2 : Beckmann & Goose parameterization |
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| 47 | !! 3 : Specified runoff in deptht (Mathiot & al. 2017) |
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| 48 | !!---------------------------------------------------------------------- |
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| 49 | !!-------------------------- OUT ------------------------------------- |
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| 50 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pqfwf,pqoce, pqhc ! fresh water, ice-ocean heat and heat content fluxes |
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| 51 | !!-------------------------- IN ------------------------------------- |
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| 52 | INTEGER, INTENT(in) :: kt ! ocean time step |
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| 53 | !!--------------------------------------------------------------------- |
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| 54 | ! |
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| 55 | ! Choose among the available ice shelf parametrisation |
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| 56 | SELECT CASE ( cn_isfpar_mlt ) |
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| 57 | CASE ( 'spe' ) ! specified runoff in depth (Mathiot et al., 2017 in preparation) |
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| 58 | CALL isfpar_mlt_spe(kt, pqhc, pqoce, pqfwf) |
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| 59 | CASE ( 'bg03' ) ! Beckmann and Goosse parametrisation |
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| 60 | CALL isfpar_mlt_bg03(kt, pqhc, pqoce, pqfwf) |
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| 61 | CASE ( 'oasis' ) |
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| 62 | !CALL isfpar_mlt_oasis |
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| 63 | CASE DEFAULT |
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| 64 | CALL ctl_stop('STOP', 'unknown isf melt formulation : cn_isfpar (should not see this)') |
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| 65 | END SELECT |
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| 66 | ! |
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| 67 | END SUBROUTINE isfpar_mlt |
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| 68 | |
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| 69 | ! ------------------------------------------------------------------------------------------------------- |
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| 70 | ! -------------------------------- PRIVATE SUBROUTINE --------------------------------------------------- |
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| 71 | ! ------------------------------------------------------------------------------------------------------- |
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| 72 | |
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| 73 | SUBROUTINE isfpar_mlt_spe(kt, pqhc, pqfwf, pqoce) |
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| 74 | !!--------------------------------------------------------------------- |
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| 75 | !! *** ROUTINE sbc_isf_bg03 *** |
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| 76 | !! |
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| 77 | !! ** Purpose : prescribed ice shelf melting in case ice shelf cavities are closed. |
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| 78 | !! data read into a forcing files. |
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| 79 | !! |
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| 80 | !! ** Reference : Mathiot et al. (2017) |
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| 81 | !!---------------------------------------------------------------------- |
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| 82 | !!-------------------------- OUT ------------------------------------- |
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| 83 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pqhc, pqfwf,pqoce ! fresh water and ice-ocean heat fluxes |
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| 84 | !!-------------------------- IN ------------------------------------- |
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| 85 | INTEGER, INTENT(in) :: kt |
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| 86 | !!-------------------------------------------------------------------- |
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| 87 | INTEGER :: jk |
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| 88 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ztfrz3d |
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| 89 | REAL(wp), DIMENSION(jpi,jpj) :: ztfrz |
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| 90 | !!-------------------------------------------------------------------- |
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| 91 | ! |
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| 92 | ! specified runoff in depth (Mathiot et al., 2017) |
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| 93 | CALL fld_read ( kt, nn_fsbc, sf_isfpar_fwf ) |
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| 94 | ! |
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| 95 | ! compute ptfrz |
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| 96 | ! 0. ------------Mean freezing point |
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| 97 | DO jk = 1,jpk |
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| 98 | CALL eos_fzp(tsn(:,:,jk,jp_sal), ztfrz3d(:,:,jk), gdept_n(:,:,jk)) |
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| 99 | END DO |
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| 100 | CALL isf_tbl(ztfrz3d, ztfrz, 'T', misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par ) |
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| 101 | ! |
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| 102 | pqfwf(:,:) = - sf_isfpar_fwf(1)%fnow(:,:,1) ! fresh water flux from the isf (fwfisf <0 mean melting) |
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| 103 | pqoce(:,:) = pqfwf(:,:) * rLfusisf ! ocean/ice shelf flux assume to be equal to latent heat flux |
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| 104 | pqhc (:,:) = pqfwf(:,:) * ztfrz(:,:) * rcp ! heat content flux |
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| 105 | ! |
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| 106 | END SUBROUTINE isfpar_mlt_spe |
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| 107 | |
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| 108 | SUBROUTINE isfpar_mlt_bg03(kt, pqhc, pqoce, pqfwf) |
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| 109 | !!--------------------------------------------------------------------- |
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| 110 | !! *** ROUTINE sbc_isf_bg03 *** |
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| 111 | !! |
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| 112 | !! ** Purpose : compute an estimate of ice shelf melting in case cavities are closed |
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| 113 | !! based on the far fields T and S properties. |
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| 114 | !! |
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| 115 | !! ** Method : See reference |
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| 116 | !! |
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| 117 | !! ** Reference : Beckmann and Goosse (2003), "A parameterization of ice shelf-ocean |
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| 118 | !! interaction for climate models", Ocean Modelling 5(2003) 157-170. |
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| 119 | !! (hereafter BG) |
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| 120 | !!---------------------------------------------------------------------- |
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| 121 | !!-------------------------- OUT ------------------------------------- |
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| 122 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pqhc, pqfwf,pqoce ! fresh water and ice-ocean heat fluxes |
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| 123 | !!-------------------------- IN ------------------------------------- |
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| 124 | INTEGER, INTENT(in) :: kt |
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| 125 | !!-------------------------------------------------------------------- |
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| 126 | INTEGER :: jk |
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| 127 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ztfrz3d ! freezing point |
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| 128 | REAL(wp), DIMENSION(jpi,jpj) :: ztfrz ! freezing point |
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| 129 | REAL(wp), DIMENSION(jpi,jpj) :: ztavg ! temperature avg |
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| 130 | !!---------------------------------------------------------------------- |
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| 131 | ! |
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| 132 | ! 0. ------------Mean freezing point |
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| 133 | DO jk = 1,jpk |
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| 134 | CALL eos_fzp(tsn(:,:,jk,jp_sal), ztfrz3d(:,:,jk), gdept_n(:,:,jk)) |
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| 135 | END DO |
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| 136 | CALL isf_tbl(ztfrz3d, ztfrz, 'T', misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par ) |
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| 137 | ! |
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| 138 | ! 1. ------------Mean temperature |
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| 139 | CALL isf_tbl(tsn(:,:,jk,jp_tem), ztavg, 'T', misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par ) |
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| 140 | ! |
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| 141 | ! 2. ------------Net heat flux and fresh water flux due to the ice shelf |
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| 142 | pqoce(:,:) = - rau0 * rcp * rn_gammat0 * risfLeff(:,:) * e1t(:,:) * ( ztfrz(:,:) - ztavg(:,:) ) * r1_e1e2t(:,:) |
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| 143 | pqfwf(:,:) = pqoce(:,:) / rLfusisf |
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| 144 | pqhc (:,:) = pqfwf(:,:) * ztfrz(:,:) * rcp ! heat content flux |
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| 145 | ! |
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| 146 | ! output ttbl |
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| 147 | CALL iom_put('ttbl_par', ztavg(:,:) ) |
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| 148 | ! |
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| 149 | ! output thermal driving |
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| 150 | CALL iom_put('isfthermald_par',( ztfrz(:,:) - ztavg(:,:) )) |
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| 151 | ! |
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| 152 | ! |
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| 153 | END SUBROUTINE isfpar_mlt_bg03 |
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| 154 | |
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| 155 | SUBROUTINE isfpar_mlt_oasis |
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| 156 | !TODO |
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| 157 | END SUBROUTINE isfpar_mlt_oasis |
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| 158 | |
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| 159 | END MODULE isfparmlt |
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