| [3] | 1 | MODULE trasbc |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE trasbc *** |
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| 4 | !! Ocean active tracers: surface boundary condition |
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| 5 | !!============================================================================== |
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| [2528] | 6 | !! History : OPA ! 1998-10 (G. Madec, G. Roullet, M. Imbard) Original code |
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| 7 | !! 8.2 ! 2001-02 (D. Ludicone) sea ice and free surface |
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| 8 | !! NEMO 1.0 ! 2002-06 (G. Madec) F90: Free form and module |
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| 9 | !! 3.3 ! 2010-04 (M. Leclair, G. Madec) Forcing averaged over 2 time steps |
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| 10 | !! - ! 2010-09 (C. Ethe, G. Madec) Merge TRA-TRC |
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| [5120] | 11 | !! 3.6 ! 2014-11 (P. Mathiot) isf melting forcing |
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| [3] | 12 | !!---------------------------------------------------------------------- |
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| [503] | 13 | |
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| 14 | !!---------------------------------------------------------------------- |
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| [6140] | 15 | !! tra_sbc : update the tracer trend at ocean surface |
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| [3] | 16 | !!---------------------------------------------------------------------- |
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| [6140] | 17 | USE oce ! ocean dynamics and active tracers |
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| 18 | USE sbc_oce ! surface boundary condition: ocean |
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| 19 | USE dom_oce ! ocean space domain variables |
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| 20 | USE phycst ! physical constant |
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| 21 | USE eosbn2 ! Equation Of State |
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| 22 | USE sbcmod ! ln_rnf |
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| 23 | USE sbcrnf ! River runoff |
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| 24 | USE traqsr ! solar radiation penetration |
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| 25 | USE trd_oce ! trends: ocean variables |
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| 26 | USE trdtra ! trends manager: tracers |
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| [9023] | 27 | #if defined key_asminc |
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| 28 | USE asminc ! Assimilation increment |
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| 29 | #endif |
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| [4990] | 30 | ! |
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| [6140] | 31 | USE in_out_manager ! I/O manager |
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| 32 | USE prtctl ! Print control |
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| 33 | USE iom ! xIOS server |
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| 34 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 35 | USE timing ! Timing |
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| [3] | 36 | |
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| 37 | IMPLICIT NONE |
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| 38 | PRIVATE |
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| 39 | |
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| [6140] | 40 | PUBLIC tra_sbc ! routine called by step.F90 |
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| [3] | 41 | |
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| 42 | !! * Substitutions |
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| 43 | # include "vectopt_loop_substitute.h90" |
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| 44 | !!---------------------------------------------------------------------- |
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| [9598] | 45 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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| [888] | 46 | !! $Id$ |
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| [10068] | 47 | !! Software governed by the CeCILL license (see ./LICENSE) |
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| [3] | 48 | !!---------------------------------------------------------------------- |
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| 49 | CONTAINS |
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| 50 | |
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| 51 | SUBROUTINE tra_sbc ( kt ) |
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| 52 | !!---------------------------------------------------------------------- |
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| 53 | !! *** ROUTINE tra_sbc *** |
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| 54 | !! |
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| 55 | !! ** Purpose : Compute the tracer surface boundary condition trend of |
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| 56 | !! (flux through the interface, concentration/dilution effect) |
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| 57 | !! and add it to the general trend of tracer equations. |
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| 58 | !! |
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| [6140] | 59 | !! ** Method : The (air+ice)-sea flux has two components: |
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| 60 | !! (1) Fext, external forcing (i.e. flux through the (air+ice)-sea interface); |
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| 61 | !! (2) Fwe , tracer carried with the water that is exchanged with air+ice. |
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| 62 | !! The input forcing fields (emp, rnf, sfx, isf) contain Fext+Fwe, |
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| 63 | !! they are simply added to the tracer trend (tsa). |
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| 64 | !! In linear free surface case (ln_linssh=T), the volume of the |
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| 65 | !! ocean does not change with the water exchanges at the (air+ice)-sea |
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| 66 | !! interface. Therefore another term has to be added, to mimic the |
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| 67 | !! concentration/dilution effect associated with water exchanges. |
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| [664] | 68 | !! |
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| [6140] | 69 | !! ** Action : - Update tsa with the surface boundary condition trend |
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| 70 | !! - send trends to trdtra module for further diagnostics(l_trdtra=T) |
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| [503] | 71 | !!---------------------------------------------------------------------- |
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| [2528] | 72 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| [6140] | 73 | ! |
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| [9023] | 74 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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| 75 | INTEGER :: ikt, ikb ! local integers |
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| 76 | REAL(wp) :: zfact, z1_e3t, zdep, ztim ! local scalar |
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| [9019] | 77 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: ztrdt, ztrds |
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| [3] | 78 | !!---------------------------------------------------------------------- |
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| [3294] | 79 | ! |
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| [9019] | 80 | IF( ln_timing ) CALL timing_start('tra_sbc') |
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| [3294] | 81 | ! |
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| [3] | 82 | IF( kt == nit000 ) THEN |
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| 83 | IF(lwp) WRITE(numout,*) |
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| 84 | IF(lwp) WRITE(numout,*) 'tra_sbc : TRAcer Surface Boundary Condition' |
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| 85 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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| 86 | ENDIF |
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| [6140] | 87 | ! |
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| [4990] | 88 | IF( l_trdtra ) THEN !* Save ta and sa trends |
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| [9019] | 89 | ALLOCATE( ztrdt(jpi,jpj,jpk) , ztrds(jpi,jpj,jpk) ) |
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| [7753] | 90 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) |
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| 91 | ztrds(:,:,:) = tsa(:,:,:,jp_sal) |
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| [216] | 92 | ENDIF |
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| [6140] | 93 | ! |
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| 94 | !!gm This should be moved into sbcmod.F90 module ? (especially now that ln_traqsr is read in namsbc namelist) |
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| [2528] | 95 | IF( .NOT.ln_traqsr ) THEN ! no solar radiation penetration |
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| [7753] | 96 | qns(:,:) = qns(:,:) + qsr(:,:) ! total heat flux in qns |
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| 97 | qsr(:,:) = 0._wp ! qsr set to zero |
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| [2528] | 98 | ENDIF |
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| [3] | 99 | |
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| [2528] | 100 | !---------------------------------------- |
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| [4990] | 101 | ! EMP, SFX and QNS effects |
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| [2528] | 102 | !---------------------------------------- |
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| [6140] | 103 | ! !== Set before sbc tracer content fields ==! |
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| 104 | IF( kt == nit000 ) THEN !* 1st time-step |
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| 105 | IF( ln_rstart .AND. & ! Restart: read in restart file |
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| [2528] | 106 | & iom_varid( numror, 'sbc_hc_b', ldstop = .FALSE. ) > 0 ) THEN |
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| [6140] | 107 | IF(lwp) WRITE(numout,*) ' nit000-1 sbc tracer content field read in the restart file' |
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| [4990] | 108 | zfact = 0.5_wp |
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| [7753] | 109 | sbc_tsc(:,:,:) = 0._wp |
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| [9367] | 110 | CALL iom_get( numror, jpdom_autoglo, 'sbc_hc_b', sbc_tsc_b(:,:,jp_tem), ldxios = lrxios ) ! before heat content sbc trend |
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| 111 | CALL iom_get( numror, jpdom_autoglo, 'sbc_sc_b', sbc_tsc_b(:,:,jp_sal), ldxios = lrxios ) ! before salt content sbc trend |
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| [6140] | 112 | ELSE ! No restart or restart not found: Euler forward time stepping |
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| [4990] | 113 | zfact = 1._wp |
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| [7753] | 114 | sbc_tsc(:,:,:) = 0._wp |
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| 115 | sbc_tsc_b(:,:,:) = 0._wp |
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| [2528] | 116 | ENDIF |
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| [6140] | 117 | ELSE !* other time-steps: swap of forcing fields |
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| [4990] | 118 | zfact = 0.5_wp |
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| [7753] | 119 | sbc_tsc_b(:,:,:) = sbc_tsc(:,:,:) |
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| [2528] | 120 | ENDIF |
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| [6140] | 121 | ! !== Now sbc tracer content fields ==! |
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| 122 | DO jj = 2, jpj |
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| 123 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| [10499] | 124 | sbc_tsc(ji,jj,jp_tem) = r1_rau0_rcp * qns(ji,jj) ! non solar heat flux |
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| [6140] | 125 | sbc_tsc(ji,jj,jp_sal) = r1_rau0 * sfx(ji,jj) ! salt flux due to freezing/melting |
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| [3] | 126 | END DO |
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| [6140] | 127 | END DO |
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| 128 | IF( ln_linssh ) THEN !* linear free surface |
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| 129 | DO jj = 2, jpj !==>> add concentration/dilution effect due to constant volume cell |
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| [2528] | 130 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| [6140] | 131 | sbc_tsc(ji,jj,jp_tem) = sbc_tsc(ji,jj,jp_tem) + r1_rau0 * emp(ji,jj) * tsn(ji,jj,1,jp_tem) |
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| 132 | sbc_tsc(ji,jj,jp_sal) = sbc_tsc(ji,jj,jp_sal) + r1_rau0 * emp(ji,jj) * tsn(ji,jj,1,jp_sal) |
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| [2528] | 133 | END DO |
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| [6140] | 134 | END DO !==>> output c./d. term |
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| 135 | IF( iom_use('emp_x_sst') ) CALL iom_put( "emp_x_sst", emp (:,:) * tsn(:,:,1,jp_tem) ) |
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| 136 | IF( iom_use('emp_x_sss') ) CALL iom_put( "emp_x_sss", emp (:,:) * tsn(:,:,1,jp_sal) ) |
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| [2528] | 137 | ENDIF |
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| [6140] | 138 | ! |
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| 139 | DO jn = 1, jpts !== update tracer trend ==! |
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| [2528] | 140 | DO jj = 2, jpj |
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| [6140] | 141 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 142 | tsa(ji,jj,1,jn) = tsa(ji,jj,1,jn) + zfact * ( sbc_tsc_b(ji,jj,jn) + sbc_tsc(ji,jj,jn) ) / e3t_n(ji,jj,1) |
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| [2528] | 143 | END DO |
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| 144 | END DO |
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| [3] | 145 | END DO |
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| [6140] | 146 | ! |
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| 147 | IF( lrst_oce ) THEN !== write sbc_tsc in the ocean restart file ==! |
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| [9367] | 148 | IF( lwxios ) CALL iom_swap( cwxios_context ) |
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| 149 | CALL iom_rstput( kt, nitrst, numrow, 'sbc_hc_b', sbc_tsc(:,:,jp_tem), ldxios = lwxios ) |
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| 150 | CALL iom_rstput( kt, nitrst, numrow, 'sbc_sc_b', sbc_tsc(:,:,jp_sal), ldxios = lwxios ) |
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| 151 | IF( lwxios ) CALL iom_swap( cxios_context ) |
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| [2528] | 152 | ENDIF |
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| 153 | ! |
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| 154 | !---------------------------------------- |
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| 155 | ! River Runoff effects |
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| 156 | !---------------------------------------- |
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| 157 | ! |
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| [3764] | 158 | IF( ln_rnf ) THEN ! input of heat and salt due to river runoff |
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| 159 | zfact = 0.5_wp |
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| [2528] | 160 | DO jj = 2, jpj |
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| 161 | DO ji = fs_2, fs_jpim1 |
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| [3764] | 162 | IF( rnf(ji,jj) /= 0._wp ) THEN |
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| 163 | zdep = zfact / h_rnf(ji,jj) |
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| [2528] | 164 | DO jk = 1, nk_rnf(ji,jj) |
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| [6140] | 165 | tsa(ji,jj,jk,jp_tem) = tsa(ji,jj,jk,jp_tem) & |
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| 166 | & + ( rnf_tsc_b(ji,jj,jp_tem) + rnf_tsc(ji,jj,jp_tem) ) * zdep |
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| 167 | IF( ln_rnf_sal ) tsa(ji,jj,jk,jp_sal) = tsa(ji,jj,jk,jp_sal) & |
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| 168 | & + ( rnf_tsc_b(ji,jj,jp_sal) + rnf_tsc(ji,jj,jp_sal) ) * zdep |
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| [2715] | 169 | END DO |
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| [2528] | 170 | ENDIF |
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| [2715] | 171 | END DO |
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| 172 | END DO |
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| [3764] | 173 | ENDIF |
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| [6472] | 174 | |
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| 175 | IF( iom_use('rnf_x_sst') ) CALL iom_put( "rnf_x_sst", rnf*tsn(:,:,1,jp_tem) ) ! runoff term on sst |
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| 176 | IF( iom_use('rnf_x_sss') ) CALL iom_put( "rnf_x_sss", rnf*tsn(:,:,1,jp_sal) ) ! runoff term on sss |
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| 177 | |
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| [9023] | 178 | #if defined key_asminc |
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| [6140] | 179 | ! |
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| 180 | !---------------------------------------- |
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| [9023] | 181 | ! Assmilation effects |
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| 182 | !---------------------------------------- |
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| 183 | ! |
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| 184 | IF( ln_sshinc ) THEN ! input of heat and salt due to assimilation |
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| 185 | ! |
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| 186 | IF( ln_linssh ) THEN |
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| 187 | DO jj = 2, jpj |
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| 188 | DO ji = fs_2, fs_jpim1 |
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| 189 | ztim = ssh_iau(ji,jj) / e3t_n(ji,jj,1) |
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| 190 | tsa(ji,jj,1,jp_tem) = tsa(ji,jj,1,jp_tem) + tsn(ji,jj,1,jp_tem) * ztim |
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| 191 | tsa(ji,jj,1,jp_sal) = tsa(ji,jj,1,jp_sal) + tsn(ji,jj,1,jp_sal) * ztim |
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| 192 | END DO |
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| 193 | END DO |
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| 194 | ELSE |
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| 195 | DO jj = 2, jpj |
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| 196 | DO ji = fs_2, fs_jpim1 |
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| 197 | ztim = ssh_iau(ji,jj) / ( ht_n(ji,jj) + 1. - ssmask(ji, jj) ) |
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| 198 | tsa(ji,jj,:,jp_tem) = tsa(ji,jj,:,jp_tem) + tsn(ji,jj,:,jp_tem) * ztim |
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| 199 | tsa(ji,jj,:,jp_sal) = tsa(ji,jj,:,jp_sal) + tsn(ji,jj,:,jp_sal) * ztim |
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| 200 | END DO |
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| 201 | END DO |
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| 202 | ENDIF |
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| 203 | ! |
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| 204 | ENDIF |
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| 205 | ! |
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| 206 | #endif |
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| 207 | ! |
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| [6140] | 208 | IF( l_trdtra ) THEN ! save the horizontal diffusive trends for further diagnostics |
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| [7753] | 209 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) - ztrdt(:,:,:) |
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| 210 | ztrds(:,:,:) = tsa(:,:,:,jp_sal) - ztrds(:,:,:) |
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| [4990] | 211 | CALL trd_tra( kt, 'TRA', jp_tem, jptra_nsr, ztrdt ) |
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| 212 | CALL trd_tra( kt, 'TRA', jp_sal, jptra_nsr, ztrds ) |
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| [9019] | 213 | DEALLOCATE( ztrdt , ztrds ) |
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| [216] | 214 | ENDIF |
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| [503] | 215 | ! |
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| [2528] | 216 | IF(ln_ctl) CALL prt_ctl( tab3d_1=tsa(:,:,:,jp_tem), clinfo1=' sbc - Ta: ', mask1=tmask, & |
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| 217 | & tab3d_2=tsa(:,:,:,jp_sal), clinfo2= ' Sa: ', mask2=tmask, clinfo3='tra' ) |
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| [503] | 218 | ! |
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| [9019] | 219 | IF( ln_timing ) CALL timing_stop('tra_sbc') |
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| [3294] | 220 | ! |
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| [3] | 221 | END SUBROUTINE tra_sbc |
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| 222 | |
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| 223 | !!====================================================================== |
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| 224 | END MODULE trasbc |
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