[3] | 1 | MODULE trabbc |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE trabbc *** |
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| 4 | !! Ocean active tracers: bottom boundary condition |
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| 5 | !!============================================================================== |
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[503] | 6 | !! History : 8.1 ! 99-10 (G. Madec) original code |
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| 7 | !! 8.5 ! 02-08 (G. Madec) free form + modules |
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| 8 | !! 8.5 ! 02-11 (A. Bozec) tra_bbc_init: original code |
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| 9 | !!---------------------------------------------------------------------- |
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[32] | 10 | #if defined key_trabbc || defined key_esopa |
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[3] | 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_trabbc' geothermal heat flux |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !! tra_bbc : update the tracer trend at ocean bottom |
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| 15 | !! tra_bbc_init : initialization of geothermal heat flux trend |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | !! * Modules used |
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| 18 | USE oce ! ocean dynamics and active tracers |
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| 19 | USE dom_oce ! ocean space and time domain |
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| 20 | USE phycst ! physical constants |
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[503] | 21 | USE trdmod ! ocean trends |
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| 22 | USE trdmod_oce ! ocean variables trends |
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[3] | 23 | USE in_out_manager ! I/O manager |
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[258] | 24 | USE prtctl ! Print control |
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[3] | 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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| 29 | PUBLIC tra_bbc ! routine called by step.F90 |
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| 30 | |
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| 31 | !! to be transfert in the namelist ???! |
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[32] | 32 | LOGICAL, PUBLIC, PARAMETER :: lk_trabbc = .TRUE. !: bbc flag |
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[3] | 33 | |
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[503] | 34 | !!* Namelist nambbc: bottom boundary condition |
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| 35 | INTEGER :: ngeo_flux = 1 ! Geothermal flux (0:no flux, 1:constant flux, 2:read in file ) |
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| 36 | REAL(wp) :: ngeo_flux_const = 86.4e-3 ! Constant value of geothermal heat flux |
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[3] | 37 | |
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[503] | 38 | INTEGER , DIMENSION(jpi,jpj) :: nbotlevt ! ocean bottom level index at T-pt |
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[592] | 39 | REAL(wp), DIMENSION(jpi,jpj) :: qgh_trd0 ! geothermal heating trend |
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[3] | 40 | |
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| 41 | !! * Substitutions |
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| 42 | # include "domzgr_substitute.h90" |
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| 43 | !!---------------------------------------------------------------------- |
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[503] | 44 | !! OPA 9.0 , LOCEAN-IPSL (2006) |
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[1152] | 45 | !! $Id$ |
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[503] | 46 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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[3] | 47 | !!---------------------------------------------------------------------- |
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| 48 | |
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| 49 | CONTAINS |
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| 50 | |
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| 51 | SUBROUTINE tra_bbc( kt ) |
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| 52 | !!---------------------------------------------------------------------- |
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| 53 | !! *** ROUTINE tra_bbc *** |
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| 54 | !! |
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| 55 | !! ** Purpose : Compute the bottom boundary contition on temperature |
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| 56 | !! associated with geothermal heating and add it to the general |
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| 57 | !! trend of temperature equations. |
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| 58 | !! |
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| 59 | !! ** Method : The geothermal heat flux set to its constant value of |
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| 60 | !! 86.4 mW/m2 (Stein and Stein 1992, Huang 1999). |
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| 61 | !! The temperature trend associated to this heat flux through the |
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| 62 | !! ocean bottom can be computed once and is added to the temperature |
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| 63 | !! trend juste above the bottom at each time step: |
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| 64 | !! ta = ta + Qsf / (rau0 rcp e3T) for k= mbathy -1 |
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| 65 | !! Where Qsf is the geothermal heat flux. |
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| 66 | !! |
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| 67 | !! ** Action : - update the temperature trends (ta) with the trend of |
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| 68 | !! the ocean bottom boundary condition |
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| 69 | !! |
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[503] | 70 | !! References : Stein, C. A., and S. Stein, 1992, Nature, 359, 123-129. |
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| 71 | !!---------------------------------------------------------------------- |
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| 72 | USE oce, ONLY : ztrdt => ua ! use ua as 3D workspace |
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| 73 | USE oce, ONLY : ztrds => va ! use va as 3D workspace |
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[3] | 74 | !! |
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[503] | 75 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 76 | !! |
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[789] | 77 | #if defined key_vectopt_loop |
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[503] | 78 | INTEGER :: ji ! dummy loop indices |
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[3] | 79 | #else |
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[503] | 80 | INTEGER :: ji, jj ! dummy loop indices |
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[3] | 81 | #endif |
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[592] | 82 | REAL(wp) :: zqgh_trd ! geothermal heat flux trend |
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[3] | 83 | !!---------------------------------------------------------------------- |
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| 84 | |
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[503] | 85 | IF( kt == nit000 ) CALL tra_bbc_init ! Initialization |
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[3] | 86 | |
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[503] | 87 | IF( l_trdtra ) THEN ! Save ta and sa trends |
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| 88 | ztrdt(:,:,:) = ta(:,:,:) |
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| 89 | ztrds(:,:,:) = 0.e0 |
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| 90 | ENDIF |
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[3] | 91 | |
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[503] | 92 | ! Add the geothermal heat flux trend on temperature |
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| 93 | |
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[3] | 94 | SELECT CASE ( ngeo_flux ) |
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[503] | 95 | ! |
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[3] | 96 | CASE ( 1:2 ) ! geothermal heat flux |
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[789] | 97 | #if defined key_vectopt_loop |
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[3] | 98 | DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
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[592] | 99 | zqgh_trd = ro0cpr * qgh_trd0(ji,1) / fse3t(ji,1,nbotlevt(ji,1) ) |
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| 100 | ta(ji,1,nbotlevt(ji,1)) = ta(ji,1,nbotlevt(ji,1)) + zqgh_trd |
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[3] | 101 | END DO |
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| 102 | #else |
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| 103 | DO jj = 2, jpjm1 |
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| 104 | DO ji = 2, jpim1 |
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[592] | 105 | zqgh_trd = ro0cpr * qgh_trd0(ji,jj) / fse3t(ji,jj,nbotlevt(ji,jj)) |
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| 106 | ta(ji,jj,nbotlevt(ji,jj)) = ta(ji,jj,nbotlevt(ji,jj)) + zqgh_trd |
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[3] | 107 | END DO |
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| 108 | END DO |
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| 109 | #endif |
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[503] | 110 | END SELECT |
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[106] | 111 | |
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[503] | 112 | IF( l_trdtra ) THEN ! Save the geothermal heat flux trend for diagnostics |
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| 113 | ztrdt(:,:,:) = ta(:,:,:) - ztrdt(:,:,:) |
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| 114 | CALL trd_mod( ztrdt, ztrds, jptra_trd_bbc, 'TRA', kt ) |
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[3] | 115 | ENDIF |
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[503] | 116 | ! |
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| 117 | IF(ln_ctl) CALL prt_ctl(tab3d_1=ta, clinfo1=' bbc - Ta: ', mask1=tmask, clinfo3='tra-ta') |
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| 118 | ! |
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[3] | 119 | END SUBROUTINE tra_bbc |
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| 120 | |
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| 121 | |
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| 122 | SUBROUTINE tra_bbc_init |
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| 123 | !!---------------------------------------------------------------------- |
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| 124 | !! *** ROUTINE tra_bbc_init *** |
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| 125 | !! |
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| 126 | !! ** Purpose : Compute once for all the trend associated with geo- |
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| 127 | !! thermal heating that will be applied at each time step at the |
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| 128 | !! bottom ocean level |
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| 129 | !! |
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| 130 | !! ** Method : Read the nambbc namelist and check the parameters. |
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| 131 | !! called at the first time step (nit000) |
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| 132 | !! |
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| 133 | !! ** Input : - Namlist nambbc |
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| 134 | !! - NetCDF file : geothermal_heating.nc ( if necessary ) |
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| 135 | !! |
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[592] | 136 | !! ** Action : - read/fix the geothermal heat qgh_trd0 |
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[3] | 137 | !! - compute the bottom ocean level nbotlevt |
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| 138 | !!---------------------------------------------------------------------- |
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[473] | 139 | USE iom |
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[503] | 140 | !! |
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[3] | 141 | INTEGER :: ji, jj ! dummy loop indices |
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[473] | 142 | INTEGER :: inum ! temporary logical unit |
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[541] | 143 | |
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| 144 | NAMELIST/nambbc/ngeo_flux, ngeo_flux_const |
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[3] | 145 | !!---------------------------------------------------------------------- |
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| 146 | |
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[503] | 147 | REWIND ( numnam ) ! Read Namelist nambbc : bottom momentum boundary condition |
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[3] | 148 | READ ( numnam, nambbc ) |
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| 149 | |
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[503] | 150 | ! ! Control print |
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[3] | 151 | IF(lwp) WRITE(numout,*) |
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| 152 | IF(lwp) WRITE(numout,*) 'tra_bbc : tempearture Bottom Boundary Condition (bbc)' |
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| 153 | IF(lwp) WRITE(numout,*) '~~~~~~~ Geothermal heatflux' |
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| 154 | IF(lwp) WRITE(numout,*) ' Namelist nambbc : set bbc parameters' |
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| 155 | IF(lwp) WRITE(numout,*) |
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| 156 | IF(lwp) WRITE(numout,*) ' Geothermal flux ngeo_flux = ', ngeo_flux |
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| 157 | IF(lwp) WRITE(numout,*) ' Constant geothermal flux ngeo_flux_const = ', ngeo_flux_const |
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| 158 | IF(lwp) WRITE(numout,*) |
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| 159 | |
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[503] | 160 | ! ! level of the ocean bottom at T-point |
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[3] | 161 | DO jj = 1, jpj |
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| 162 | DO ji = 1, jpi |
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| 163 | nbotlevt(ji,jj) = MAX( mbathy(ji,jj)-1, 1 ) |
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| 164 | END DO |
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| 165 | END DO |
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| 166 | |
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[503] | 167 | SELECT CASE ( ngeo_flux ) ! initialization of geothermal heat flux |
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| 168 | ! |
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[3] | 169 | CASE ( 0 ) ! no geothermal heat flux |
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| 170 | IF(lwp) WRITE(numout,*) |
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| 171 | IF(lwp) WRITE(numout,*) ' *** no geothermal heat flux' |
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[503] | 172 | ! |
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[3] | 173 | CASE ( 1 ) ! constant flux |
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| 174 | IF(lwp) WRITE(numout,*) ' *** constant heat flux = ', ngeo_flux_const |
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[592] | 175 | qgh_trd0(:,:) = ngeo_flux_const |
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[503] | 176 | ! |
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[3] | 177 | CASE ( 2 ) ! variable geothermal heat flux |
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| 178 | ! read the geothermal fluxes in mW/m2 |
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[503] | 179 | ! |
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[473] | 180 | IF(lwp) WRITE(numout,*) ' *** variable geothermal heat flux' |
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| 181 | CALL iom_open ( 'geothermal_heating.nc', inum ) |
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[592] | 182 | CALL iom_get ( inum, jpdom_data, 'heatflow', qgh_trd0 ) |
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[473] | 183 | CALL iom_close (inum) |
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[503] | 184 | ! |
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[592] | 185 | qgh_trd0(:,:) = qgh_trd0(:,:) * 1.e-3 ! conversion in W/m2 |
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[503] | 186 | ! |
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[3] | 187 | CASE DEFAULT |
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[473] | 188 | WRITE(ctmp1,*) ' bad flag value for ngeo_flux = ', ngeo_flux |
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| 189 | CALL ctl_stop( ctmp1 ) |
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[503] | 190 | ! |
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[3] | 191 | END SELECT |
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| 192 | |
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| 193 | |
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| 194 | END SUBROUTINE tra_bbc_init |
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| 195 | |
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| 196 | #else |
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| 197 | !!---------------------------------------------------------------------- |
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| 198 | !! Default option Empty module |
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| 199 | !!---------------------------------------------------------------------- |
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[32] | 200 | LOGICAL, PUBLIC, PARAMETER :: lk_trabbc = .FALSE. !: bbc flag |
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[3] | 201 | CONTAINS |
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| 202 | SUBROUTINE tra_bbc( kt ) ! Empty routine |
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[32] | 203 | WRITE(*,*) 'tra_bbc: You should not have seen this print! error?', kt |
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[3] | 204 | END SUBROUTINE tra_bbc |
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| 205 | #endif |
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| 206 | |
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| 207 | !!====================================================================== |
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| 208 | END MODULE trabbc |
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