[3] | 1 | MODULE trabbc |
---|
| 2 | !!============================================================================== |
---|
| 3 | !! *** MODULE trabbc *** |
---|
[2528] | 4 | !! Ocean active tracers: bottom boundary condition (geothermal heat flux) |
---|
[3] | 5 | !!============================================================================== |
---|
[2528] | 6 | !! History : OPA ! 1999-10 (G. Madec) original code |
---|
| 7 | !! NEMO 1.0 ! 2002-08 (G. Madec) free form + modules |
---|
| 8 | !! - ! 2002-11 (A. Bozec) tra_bbc_init: original code |
---|
| 9 | !! 3.3 ! 2010-10 (G. Madec) dynamical allocation + suppression of key_trabbc |
---|
| 10 | !! - ! 2010-11 (G. Madec) use mbkt array (deepest ocean t-level) |
---|
[503] | 11 | !!---------------------------------------------------------------------- |
---|
[2528] | 12 | |
---|
[3] | 13 | !!---------------------------------------------------------------------- |
---|
[6140] | 14 | !! tra_bbc : update the tracer trend at ocean bottom |
---|
| 15 | !! tra_bbc_init : initialization of geothermal heat flux trend |
---|
[3] | 16 | !!---------------------------------------------------------------------- |
---|
[6140] | 17 | USE oce ! ocean variables |
---|
| 18 | USE dom_oce ! domain: ocean |
---|
| 19 | USE phycst ! physical constants |
---|
| 20 | USE trd_oce ! trends: ocean variables |
---|
| 21 | USE trdtra ! trends manager: tracers |
---|
| 22 | ! |
---|
| 23 | USE in_out_manager ! I/O manager |
---|
| 24 | USE iom ! xIOS |
---|
| 25 | USE fldread ! read input fields |
---|
| 26 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
---|
| 27 | USE lib_mpp ! distributed memory computing library |
---|
| 28 | USE prtctl ! Print control |
---|
| 29 | USE timing ! Timing |
---|
[3] | 30 | |
---|
| 31 | IMPLICIT NONE |
---|
| 32 | PRIVATE |
---|
| 33 | |
---|
| 34 | PUBLIC tra_bbc ! routine called by step.F90 |
---|
[2528] | 35 | PUBLIC tra_bbc_init ! routine called by opa.F90 |
---|
[3] | 36 | |
---|
[4147] | 37 | ! !!* Namelist nambbc: bottom boundary condition * |
---|
| 38 | LOGICAL, PUBLIC :: ln_trabbc !: Geothermal heat flux flag |
---|
| 39 | INTEGER :: nn_geoflx ! Geothermal flux (=1:constant flux, =2:read in file ) |
---|
| 40 | REAL(wp) :: rn_geoflx_cst ! Constant value of geothermal heat flux |
---|
[3] | 41 | |
---|
[6140] | 42 | REAL(wp), PUBLIC , ALLOCATABLE, DIMENSION(:,:) :: qgh_trd0 ! geothermal heating trend |
---|
| 43 | |
---|
| 44 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_qgh ! structure of input qgh (file informations, fields read) |
---|
[3] | 45 | |
---|
| 46 | !!---------------------------------------------------------------------- |
---|
[9598] | 47 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
---|
[5217] | 48 | !! $Id$ |
---|
[10068] | 49 | !! Software governed by the CeCILL license (see ./LICENSE) |
---|
[3] | 50 | !!---------------------------------------------------------------------- |
---|
| 51 | CONTAINS |
---|
| 52 | |
---|
| 53 | SUBROUTINE tra_bbc( kt ) |
---|
| 54 | !!---------------------------------------------------------------------- |
---|
| 55 | !! *** ROUTINE tra_bbc *** |
---|
| 56 | !! |
---|
| 57 | !! ** Purpose : Compute the bottom boundary contition on temperature |
---|
[1601] | 58 | !! associated with geothermal heating and add it to the |
---|
| 59 | !! general trend of temperature equations. |
---|
[3] | 60 | !! |
---|
| 61 | !! ** Method : The geothermal heat flux set to its constant value of |
---|
[1601] | 62 | !! 86.4 mW/m2 (Stein and Stein 1992, Huang 1999). |
---|
[3] | 63 | !! The temperature trend associated to this heat flux through the |
---|
| 64 | !! ocean bottom can be computed once and is added to the temperature |
---|
| 65 | !! trend juste above the bottom at each time step: |
---|
[2528] | 66 | !! ta = ta + Qsf / (rau0 rcp e3T) for k= mbkt |
---|
[3] | 67 | !! Where Qsf is the geothermal heat flux. |
---|
| 68 | !! |
---|
[6140] | 69 | !! ** Action : - update the temperature trends with geothermal heating trend |
---|
| 70 | !! - send the trend for further diagnostics (ln_trdtra=T) |
---|
[3] | 71 | !! |
---|
[503] | 72 | !! References : Stein, C. A., and S. Stein, 1992, Nature, 359, 123-129. |
---|
[1601] | 73 | !! Emile-Geay and Madec, 2009, Ocean Science. |
---|
[503] | 74 | !!---------------------------------------------------------------------- |
---|
[2715] | 75 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
---|
[6140] | 76 | ! |
---|
[7753] | 77 | INTEGER :: ji, jj ! dummy loop indices |
---|
[9019] | 78 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: ztrdt ! 3D workspace |
---|
[3] | 79 | !!---------------------------------------------------------------------- |
---|
[2528] | 80 | ! |
---|
[9019] | 81 | IF( ln_timing ) CALL timing_start('tra_bbc') |
---|
[3294] | 82 | ! |
---|
[6140] | 83 | IF( l_trdtra ) THEN ! Save the input temperature trend |
---|
[9019] | 84 | ALLOCATE( ztrdt(jpi,jpj,jpk) ) |
---|
[7753] | 85 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) |
---|
[503] | 86 | ENDIF |
---|
[6140] | 87 | ! ! Add the geothermal trend on temperature |
---|
[2528] | 88 | DO jj = 2, jpjm1 |
---|
| 89 | DO ji = 2, jpim1 |
---|
[6140] | 90 | tsa(ji,jj,mbkt(ji,jj),jp_tem) = tsa(ji,jj,mbkt(ji,jj),jp_tem) + qgh_trd0(ji,jj) / e3t_n(ji,jj,mbkt(ji,jj)) |
---|
[3] | 91 | END DO |
---|
[2528] | 92 | END DO |
---|
| 93 | ! |
---|
[10425] | 94 | CALL lbc_lnk( 'trabbc', tsa(:,:,:,jp_tem) , 'T', 1. ) |
---|
[5397] | 95 | ! |
---|
[6140] | 96 | IF( l_trdtra ) THEN ! Send the trend for diagnostics |
---|
[7753] | 97 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) - ztrdt(:,:,:) |
---|
[4990] | 98 | CALL trd_tra( kt, 'TRA', jp_tem, jptra_bbc, ztrdt ) |
---|
[9019] | 99 | DEALLOCATE( ztrdt ) |
---|
[3] | 100 | ENDIF |
---|
[503] | 101 | ! |
---|
[2528] | 102 | IF(ln_ctl) CALL prt_ctl( tab3d_1=tsa(:,:,:,jp_tem), clinfo1=' bbc - Ta: ', mask1=tmask, clinfo3='tra-ta' ) |
---|
[503] | 103 | ! |
---|
[9019] | 104 | IF( ln_timing ) CALL timing_stop('tra_bbc') |
---|
[3294] | 105 | ! |
---|
[3] | 106 | END SUBROUTINE tra_bbc |
---|
| 107 | |
---|
| 108 | |
---|
| 109 | SUBROUTINE tra_bbc_init |
---|
| 110 | !!---------------------------------------------------------------------- |
---|
| 111 | !! *** ROUTINE tra_bbc_init *** |
---|
| 112 | !! |
---|
[1601] | 113 | !! ** Purpose : Compute once for all the trend associated with geothermal |
---|
| 114 | !! heating that will be applied at each time step at the |
---|
| 115 | !! last ocean level |
---|
[3] | 116 | !! |
---|
| 117 | !! ** Method : Read the nambbc namelist and check the parameters. |
---|
| 118 | !! |
---|
| 119 | !! ** Input : - Namlist nambbc |
---|
| 120 | !! - NetCDF file : geothermal_heating.nc ( if necessary ) |
---|
| 121 | !! |
---|
[592] | 122 | !! ** Action : - read/fix the geothermal heat qgh_trd0 |
---|
[3] | 123 | !!---------------------------------------------------------------------- |
---|
| 124 | INTEGER :: ji, jj ! dummy loop indices |
---|
[473] | 125 | INTEGER :: inum ! temporary logical unit |
---|
[4147] | 126 | INTEGER :: ios ! Local integer output status for namelist read |
---|
[5397] | 127 | INTEGER :: ierror ! local integer |
---|
[4990] | 128 | ! |
---|
[5397] | 129 | TYPE(FLD_N) :: sn_qgh ! informations about the geotherm. field to be read |
---|
| 130 | CHARACTER(len=256) :: cn_dir ! Root directory for location of ssr files |
---|
[9019] | 131 | !! |
---|
[5397] | 132 | NAMELIST/nambbc/ln_trabbc, nn_geoflx, rn_geoflx_cst, sn_qgh, cn_dir |
---|
[3] | 133 | !!---------------------------------------------------------------------- |
---|
[6140] | 134 | ! |
---|
[4147] | 135 | REWIND( numnam_ref ) ! Namelist nambbc in reference namelist : Bottom momentum boundary condition |
---|
| 136 | READ ( numnam_ref, nambbc, IOSTAT = ios, ERR = 901) |
---|
[6140] | 137 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambbc in reference namelist', lwp ) |
---|
| 138 | ! |
---|
[4147] | 139 | REWIND( numnam_cfg ) ! Namelist nambbc in configuration namelist : Bottom momentum boundary condition |
---|
| 140 | READ ( numnam_cfg, nambbc, IOSTAT = ios, ERR = 902 ) |
---|
[9168] | 141 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nambbc in configuration namelist', lwp ) |
---|
[4624] | 142 | IF(lwm) WRITE ( numond, nambbc ) |
---|
[6140] | 143 | ! |
---|
[2528] | 144 | IF(lwp) THEN ! Control print |
---|
[1601] | 145 | WRITE(numout,*) |
---|
[2528] | 146 | WRITE(numout,*) 'tra_bbc : Bottom Boundary Condition (bbc), apply a Geothermal heating' |
---|
[1601] | 147 | WRITE(numout,*) '~~~~~~~ ' |
---|
| 148 | WRITE(numout,*) ' Namelist nambbc : set bbc parameters' |
---|
[2528] | 149 | WRITE(numout,*) ' Apply a geothermal heating at ocean bottom ln_trabbc = ', ln_trabbc |
---|
| 150 | WRITE(numout,*) ' type of geothermal flux nn_geoflx = ', nn_geoflx |
---|
| 151 | WRITE(numout,*) ' Constant geothermal flux value rn_geoflx_cst = ', rn_geoflx_cst |
---|
[1601] | 152 | WRITE(numout,*) |
---|
| 153 | ENDIF |
---|
[6140] | 154 | ! |
---|
[2528] | 155 | IF( ln_trabbc ) THEN !== geothermal heating ==! |
---|
[503] | 156 | ! |
---|
[2528] | 157 | ALLOCATE( qgh_trd0(jpi,jpj) ) ! allocation |
---|
[503] | 158 | ! |
---|
[2528] | 159 | SELECT CASE ( nn_geoflx ) ! geothermal heat flux / (rauO * Cp) |
---|
[503] | 160 | ! |
---|
[2528] | 161 | CASE ( 1 ) !* constant flux |
---|
[9190] | 162 | IF(lwp) WRITE(numout,*) ' ==>>> constant heat flux = ', rn_geoflx_cst |
---|
[7753] | 163 | qgh_trd0(:,:) = r1_rau0_rcp * rn_geoflx_cst |
---|
[2528] | 164 | ! |
---|
| 165 | CASE ( 2 ) !* variable geothermal heat flux : read the geothermal fluxes in mW/m2 |
---|
[9190] | 166 | IF(lwp) WRITE(numout,*) ' ==>>> variable geothermal heat flux' |
---|
[2528] | 167 | ! |
---|
[5397] | 168 | ALLOCATE( sf_qgh(1), STAT=ierror ) |
---|
| 169 | IF( ierror > 0 ) THEN |
---|
| 170 | CALL ctl_stop( 'tra_bbc_init: unable to allocate sf_qgh structure' ) ; |
---|
| 171 | RETURN |
---|
| 172 | ENDIF |
---|
| 173 | ALLOCATE( sf_qgh(1)%fnow(jpi,jpj,1) ) |
---|
[9019] | 174 | IF( sn_qgh%ln_tint ) ALLOCATE( sf_qgh(1)%fdta(jpi,jpj,1,2) ) |
---|
[5397] | 175 | ! fill sf_chl with sn_chl and control print |
---|
| 176 | CALL fld_fill( sf_qgh, (/ sn_qgh /), cn_dir, 'tra_bbc_init', & |
---|
[7646] | 177 | & 'bottom temperature boundary condition', 'nambbc', no_print ) |
---|
[5397] | 178 | |
---|
| 179 | CALL fld_read( nit000, 1, sf_qgh ) ! Read qgh data |
---|
[7753] | 180 | qgh_trd0(:,:) = r1_rau0_rcp * sf_qgh(1)%fnow(:,:,1) * 1.e-3 ! conversion in W/m2 |
---|
[5397] | 181 | ! |
---|
[2528] | 182 | CASE DEFAULT |
---|
| 183 | WRITE(ctmp1,*) ' bad flag value for nn_geoflx = ', nn_geoflx |
---|
| 184 | CALL ctl_stop( ctmp1 ) |
---|
| 185 | END SELECT |
---|
[503] | 186 | ! |
---|
[2528] | 187 | ELSE |
---|
[9190] | 188 | IF(lwp) WRITE(numout,*) ' ==>>> no geothermal heat flux' |
---|
[2528] | 189 | ENDIF |
---|
[1601] | 190 | ! |
---|
[3] | 191 | END SUBROUTINE tra_bbc_init |
---|
| 192 | |
---|
| 193 | !!====================================================================== |
---|
| 194 | END MODULE trabbc |
---|