[888] | 1 | MODULE sbcssr |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE sbcssr *** |
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[1524] | 4 | !! Surface module : heat and fresh water fluxes a restoring term toward observed SST/SSS |
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[888] | 5 | !!====================================================================== |
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[1524] | 6 | !! History : 3.0 ! 2006-06 (G. Madec) Original code |
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[1482] | 7 | !! 3.2 ! 2009-04 (B. Lemaire) Introduce iom_put |
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[888] | 8 | !!---------------------------------------------------------------------- |
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| 9 | |
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| 10 | !!---------------------------------------------------------------------- |
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[3625] | 11 | !! sbc_ssr : add to sbc a restoring term toward SST/SSS climatology |
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[888] | 12 | !!---------------------------------------------------------------------- |
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[3625] | 13 | USE oce ! ocean dynamics and tracers |
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| 14 | USE dom_oce ! ocean space and time domain |
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| 15 | USE sbc_oce ! surface boundary condition |
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| 16 | USE phycst ! physical constants |
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| 17 | USE sbcrnf ! surface boundary condition : runoffs |
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| 18 | USE fldread ! read input fields |
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| 19 | USE iom ! I/O manager |
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| 20 | USE in_out_manager ! I/O manager |
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| 21 | USE lib_mpp ! distribued memory computing library |
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| 22 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 23 | USE timing ! Timing |
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| 24 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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[888] | 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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[3764] | 29 | PUBLIC sbc_ssr ! routine called in sbcmod |
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| 30 | PUBLIC sbc_ssr_init ! routine called in sbcmod |
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[888] | 31 | |
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[2715] | 32 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: erp !: evaporation damping [kg/m2/s] |
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| 33 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: qrp !: heat flux damping [w/m2] |
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[1524] | 34 | |
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[1601] | 35 | ! !!* Namelist namsbc_ssr * |
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| 36 | INTEGER, PUBLIC :: nn_sstr = 0 ! SST/SSS restoring indicator |
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| 37 | INTEGER, PUBLIC :: nn_sssr = 0 ! SST/SSS restoring indicator |
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| 38 | REAL(wp) :: rn_dqdt = -40.e0 ! restoring factor on SST and SSS |
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| 39 | REAL(wp) :: rn_deds = -27.70 ! restoring factor on SST and SSS |
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| 40 | LOGICAL :: ln_sssr_bnd = .false. ! flag to bound erp term |
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| 41 | REAL(wp) :: rn_sssr_bnd = 0.e0 ! ABS(Max./Min.) value of erp term [mm/day] |
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[1524] | 42 | |
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| 43 | REAL(wp) , ALLOCATABLE, DIMENSION(:) :: buffer ! Temporary buffer for exchange |
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[1106] | 44 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_sst ! structure of input SST (file informations, fields read) |
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| 45 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_sss ! structure of input SSS (file informations, fields read) |
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[888] | 46 | |
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| 47 | !! * Substitutions |
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| 48 | # include "domzgr_substitute.h90" |
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| 49 | !!---------------------------------------------------------------------- |
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[2715] | 50 | !! NEMO/OPA 4.0 , NEMO Consortium (2011) |
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[1156] | 51 | !! $Id$ |
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[2715] | 52 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[888] | 53 | !!---------------------------------------------------------------------- |
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| 54 | CONTAINS |
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| 55 | |
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| 56 | SUBROUTINE sbc_ssr( kt ) |
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| 57 | !!--------------------------------------------------------------------- |
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| 58 | !! *** ROUTINE sbc_ssr *** |
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| 59 | !! |
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| 60 | !! ** Purpose : Add to heat and/or freshwater fluxes a damping term |
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| 61 | !! toward observed SST and/or SSS. |
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| 62 | !! |
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| 63 | !! ** Method : - Read namelist namsbc_ssr |
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| 64 | !! - Read observed SST and/or SSS |
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| 65 | !! - at each nscb time step |
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| 66 | !! add a retroaction term on qns (nn_sstr = 1) |
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[3625] | 67 | !! add a damping term on sfx (nn_sssr = 1) |
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| 68 | !! add a damping term on emp (nn_sssr = 2) |
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[888] | 69 | !!--------------------------------------------------------------------- |
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| 70 | INTEGER, INTENT(in ) :: kt ! ocean time step |
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| 71 | !! |
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| 72 | INTEGER :: ji, jj ! dummy loop indices |
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| 73 | REAL(wp) :: zerp ! local scalar for evaporation damping |
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| 74 | REAL(wp) :: zqrp ! local scalar for heat flux damping |
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[1601] | 75 | REAL(wp) :: zsrp ! local scalar for unit conversion of rn_deds factor |
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[1554] | 76 | REAL(wp) :: zerp_bnd ! local scalar for unit conversion of rn_epr_max factor |
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[888] | 77 | INTEGER :: ierror ! return error code |
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| 78 | !! |
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| 79 | CHARACTER(len=100) :: cn_dir ! Root directory for location of ssr files |
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| 80 | TYPE(FLD_N) :: sn_sst, sn_sss ! informations about the fields to be read |
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[1601] | 81 | NAMELIST/namsbc_ssr/ cn_dir, nn_sstr, nn_sssr, rn_dqdt, rn_deds, sn_sst, sn_sss, ln_sssr_bnd, rn_sssr_bnd |
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[888] | 82 | !!---------------------------------------------------------------------- |
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[1524] | 83 | ! |
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[3294] | 84 | IF( nn_timing == 1 ) CALL timing_start('sbc_ssr') |
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| 85 | ! |
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[888] | 86 | IF( nn_sstr + nn_sssr /= 0 ) THEN |
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[1524] | 87 | ! |
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| 88 | IF( nn_sstr == 1) CALL fld_read( kt, nn_fsbc, sf_sst ) ! Read SST data and provides it at kt |
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| 89 | IF( nn_sssr >= 1) CALL fld_read( kt, nn_fsbc, sf_sss ) ! Read SSS data and provides it at kt |
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| 90 | ! |
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[888] | 91 | ! ! ========================= ! |
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| 92 | IF( MOD( kt-1, nn_fsbc ) == 0 ) THEN ! Add restoring term ! |
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| 93 | ! ! ========================= ! |
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| 94 | ! |
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[3625] | 95 | IF( nn_sstr == 1 ) THEN !* Temperature restoring term |
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[888] | 96 | !CDIR COLLAPSE |
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| 97 | DO jj = 1, jpj |
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| 98 | DO ji = 1, jpi |
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[2528] | 99 | zqrp = rn_dqdt * ( sst_m(ji,jj) - sf_sst(1)%fnow(ji,jj,1) ) |
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[888] | 100 | qns(ji,jj) = qns(ji,jj) + zqrp |
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| 101 | qrp(ji,jj) = zqrp |
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| 102 | END DO |
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| 103 | END DO |
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[1482] | 104 | CALL iom_put( "qrp", qrp ) ! heat flux damping |
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[888] | 105 | ENDIF |
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| 106 | ! |
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[3625] | 107 | IF( nn_sssr == 1 ) THEN !* Salinity damping term (salt flux only (sfx)) |
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[1601] | 108 | zsrp = rn_deds / rday ! from [mm/day] to [kg/m2/s] |
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[888] | 109 | !CDIR COLLAPSE |
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| 110 | DO jj = 1, jpj |
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| 111 | DO ji = 1, jpi |
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| 112 | zerp = zsrp * ( 1. - 2.*rnfmsk(ji,jj) ) & ! No damping in vicinity of river mouths |
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[3625] | 113 | & * ( sss_m(ji,jj) - sf_sss(1)%fnow(ji,jj,1) ) |
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| 114 | sfx(ji,jj) = sfx(ji,jj) + zerp ! salt flux |
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| 115 | erp(ji,jj) = zerp / MAX( sss_m(ji,jj), 1.e-20 ) ! converted into an equivalent volume flux (diagnostic only) |
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[888] | 116 | END DO |
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| 117 | END DO |
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[1482] | 118 | CALL iom_put( "erp", erp ) ! freshwater flux damping |
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[1601] | 119 | ! |
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[3625] | 120 | ELSEIF( nn_sssr == 2 ) THEN !* Salinity damping term (volume flux (emp) and associated heat flux (qns) |
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[1601] | 121 | zsrp = rn_deds / rday ! from [mm/day] to [kg/m2/s] |
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[1554] | 122 | zerp_bnd = rn_sssr_bnd / rday ! - - |
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[888] | 123 | !CDIR COLLAPSE |
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| 124 | DO jj = 1, jpj |
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| 125 | DO ji = 1, jpi |
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| 126 | zerp = zsrp * ( 1. - 2.*rnfmsk(ji,jj) ) & ! No damping in vicinity of river mouths |
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[2528] | 127 | & * ( sss_m(ji,jj) - sf_sss(1)%fnow(ji,jj,1) ) & |
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[3625] | 128 | & / MAX( sss_m(ji,jj), 1.e-20 ) |
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[1554] | 129 | IF( ln_sssr_bnd ) zerp = SIGN( 1., zerp ) * MIN( zerp_bnd, ABS(zerp) ) |
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[3625] | 130 | emp(ji,jj) = emp (ji,jj) + zerp |
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| 131 | qns(ji,jj) = qns(ji,jj) - zerp * rcp * sst_m(ji,jj) |
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| 132 | erp(ji,jj) = zerp |
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[888] | 133 | END DO |
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| 134 | END DO |
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[1482] | 135 | CALL iom_put( "erp", erp ) ! freshwater flux damping |
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[888] | 136 | ENDIF |
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| 137 | ! |
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| 138 | ENDIF |
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| 139 | ! |
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| 140 | ENDIF |
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| 141 | ! |
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[3294] | 142 | IF( nn_timing == 1 ) CALL timing_stop('sbc_ssr') |
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| 143 | ! |
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[888] | 144 | END SUBROUTINE sbc_ssr |
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[3764] | 145 | |
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| 146 | |
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| 147 | SUBROUTINE sbc_ssr_init |
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| 148 | !!--------------------------------------------------------------------- |
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| 149 | !! *** ROUTINE sbc_ssr_init *** |
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| 150 | !! |
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| 151 | !! ** Purpose : initialisation of surface damping term |
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| 152 | !! |
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| 153 | !! ** Method : - Read namelist namsbc_ssr |
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| 154 | !! - Read observed SST and/or SSS if required |
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| 155 | !!--------------------------------------------------------------------- |
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| 156 | INTEGER :: ji, jj ! dummy loop indices |
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| 157 | REAL(wp) :: zerp ! local scalar for evaporation damping |
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| 158 | REAL(wp) :: zqrp ! local scalar for heat flux damping |
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| 159 | REAL(wp) :: zsrp ! local scalar for unit conversion of rn_deds factor |
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| 160 | REAL(wp) :: zerp_bnd ! local scalar for unit conversion of rn_epr_max factor |
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| 161 | INTEGER :: ierror ! return error code |
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| 162 | !! |
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| 163 | CHARACTER(len=100) :: cn_dir ! Root directory for location of ssr files |
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| 164 | TYPE(FLD_N) :: sn_sst, sn_sss ! informations about the fields to be read |
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| 165 | NAMELIST/namsbc_ssr/ cn_dir, nn_sstr, nn_sssr, rn_dqdt, rn_deds, sn_sst, sn_sss, ln_sssr_bnd, rn_sssr_bnd |
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| 166 | !!---------------------------------------------------------------------- |
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| 167 | ! |
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| 168 | ! !* set file information |
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| 169 | cn_dir = './' ! directory in which the model is executed |
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| 170 | ! ... default values (NB: frequency positive => hours, negative => months) |
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| 171 | ! ! file ! frequency ! variable ! time intep ! clim ! 'yearly' or ! weights ! rotation ! |
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| 172 | ! ! name ! (hours) ! name ! (T/F) ! (T/F) ! 'monthly' ! filename ! pairs ! |
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| 173 | sn_sst = FLD_N( 'sst' , 24 , 'sst' , .false. , .false. , 'yearly' , '' , '' ) |
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| 174 | sn_sss = FLD_N( 'sss' , -1 , 'sss' , .true. , .false. , 'yearly' , '' , '' ) |
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| 175 | |
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| 176 | REWIND( numnam ) !* read in namlist namflx |
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| 177 | READ ( numnam, namsbc_ssr ) |
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| 178 | |
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| 179 | IF(lwp) THEN !* control print |
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| 180 | WRITE(numout,*) |
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| 181 | WRITE(numout,*) 'sbc_ssr : SST and/or SSS damping term ' |
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| 182 | WRITE(numout,*) '~~~~~~~ ' |
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| 183 | WRITE(numout,*) ' Namelist namsbc_ssr :' |
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| 184 | WRITE(numout,*) ' SST restoring term (Yes=1) nn_sstr = ', nn_sstr |
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| 185 | WRITE(numout,*) ' SSS damping term (Yes=1, salt flux) nn_sssr = ', nn_sssr |
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| 186 | WRITE(numout,*) ' (Yes=2, volume flux) ' |
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| 187 | WRITE(numout,*) ' dQ/dT (restoring magnitude on SST) rn_dqdt = ', rn_dqdt, ' W/m2/K' |
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| 188 | WRITE(numout,*) ' dE/dS (restoring magnitude on SST) rn_deds = ', rn_deds, ' mm/day' |
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| 189 | WRITE(numout,*) ' flag to bound erp term ln_sssr_bnd = ', ln_sssr_bnd |
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| 190 | WRITE(numout,*) ' ABS(Max./Min.) erp threshold rn_sssr_bnd = ', rn_sssr_bnd, ' mm/day' |
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| 191 | ENDIF |
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| 192 | ! |
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| 193 | ! !* Allocate erp and qrp array |
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| 194 | ALLOCATE( qrp(jpi,jpj), erp(jpi,jpj), STAT=ierror ) |
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| 195 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_ssr: unable to allocate erp and qrp array' ) |
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| 196 | ! |
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| 197 | IF( nn_sstr == 1 ) THEN !* set sf_sst structure & allocate arrays |
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| 198 | ! |
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| 199 | ALLOCATE( sf_sst(1), STAT=ierror ) |
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| 200 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_ssr: unable to allocate sf_sst structure' ) |
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| 201 | ALLOCATE( sf_sst(1)%fnow(jpi,jpj,1), STAT=ierror ) |
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| 202 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_ssr: unable to allocate sf_sst now array' ) |
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| 203 | ! |
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| 204 | ! fill sf_sst with sn_sst and control print |
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| 205 | CALL fld_fill( sf_sst, (/ sn_sst /), cn_dir, 'sbc_ssr', 'SST restoring term toward SST data', 'namsbc_ssr' ) |
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| 206 | IF( sf_sst(1)%ln_tint ) ALLOCATE( sf_sst(1)%fdta(jpi,jpj,1,2), STAT=ierror ) |
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| 207 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_ssr: unable to allocate sf_sst data array' ) |
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| 208 | ! |
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| 209 | ENDIF |
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| 210 | ! |
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| 211 | IF( nn_sssr >= 1 ) THEN !* set sf_sss structure & allocate arrays |
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| 212 | ! |
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| 213 | ALLOCATE( sf_sss(1), STAT=ierror ) |
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| 214 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_ssr: unable to allocate sf_sss structure' ) |
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| 215 | ALLOCATE( sf_sss(1)%fnow(jpi,jpj,1), STAT=ierror ) |
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| 216 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_ssr: unable to allocate sf_sss now array' ) |
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| 217 | ! |
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| 218 | ! fill sf_sss with sn_sss and control print |
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| 219 | CALL fld_fill( sf_sss, (/ sn_sss /), cn_dir, 'sbc_ssr', 'SSS restoring term toward SSS data', 'namsbc_ssr' ) |
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| 220 | IF( sf_sss(1)%ln_tint ) ALLOCATE( sf_sss(1)%fdta(jpi,jpj,1,2), STAT=ierror ) |
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| 221 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_ssr: unable to allocate sf_sss data array' ) |
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| 222 | ! |
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| 223 | ENDIF |
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| 224 | ! |
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| 225 | ! !* Initialize qrp and erp if no restoring |
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| 226 | IF( nn_sstr /= 1 ) qrp(:,:) = 0._wp |
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| 227 | IF( nn_sssr /= 1 .OR. nn_sssr /= 2 ) erp(:,:) = 0._wp |
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| 228 | ! |
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| 229 | END SUBROUTINE sbc_ssr_init |
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[888] | 230 | |
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| 231 | !!====================================================================== |
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| 232 | END MODULE sbcssr |
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