[186] | 1 | MODULE trcnxt |
---|
| 2 | !!====================================================================== |
---|
| 3 | !! *** MODULE trcnxt *** |
---|
| 4 | !! Ocean passive tracers: time stepping on passives tracers |
---|
| 5 | !!====================================================================== |
---|
| 6 | #if defined key_passivetrc |
---|
| 7 | !!---------------------------------------------------------------------- |
---|
| 8 | !! trc_nxt : time stepping on passive tracers |
---|
| 9 | !!---------------------------------------------------------------------- |
---|
| 10 | !! * Modules used |
---|
| 11 | USE oce_trc ! ocean dynamics and tracers variables |
---|
[202] | 12 | USE trc ! ocean passive tracers variables |
---|
[186] | 13 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
---|
[202] | 14 | USE trctrp_lec ! pasive tracers transport |
---|
[186] | 15 | |
---|
| 16 | IMPLICIT NONE |
---|
| 17 | PRIVATE |
---|
| 18 | |
---|
| 19 | !! * Routine accessibility |
---|
| 20 | PUBLIC trc_nxt ! routine called by step.F90 |
---|
| 21 | !!---------------------------------------------------------------------- |
---|
| 22 | !! OPA 9.0 , LODYC-IPSL (2003) |
---|
| 23 | !!---------------------------------------------------------------------- |
---|
| 24 | |
---|
| 25 | CONTAINS |
---|
| 26 | |
---|
| 27 | SUBROUTINE trc_nxt( kt ) |
---|
| 28 | !!---------------------------------------------------------------------- |
---|
| 29 | !! *** ROUTINE trcnxt *** |
---|
| 30 | !! |
---|
| 31 | !! ** Purpose : Compute the passive tracers fields at the |
---|
| 32 | !! next time-step from their temporal trends and swap the fields. |
---|
| 33 | !! |
---|
| 34 | !! ** Method : Apply lateral boundary conditions on (ua,va) through |
---|
| 35 | !! call to lbc_lnk routine |
---|
| 36 | !! default: |
---|
| 37 | !! arrays swap |
---|
| 38 | !! (trn) = (tra) ; (tra) = (0,0) |
---|
| 39 | !! (trb) = (trn) |
---|
| 40 | !! |
---|
| 41 | !! For Arakawa or TVD Scheme : |
---|
| 42 | !! A Asselin time filter applied on now tracers (trn) to avoid |
---|
| 43 | !! the divergence of two consecutive time-steps and tr arrays |
---|
| 44 | !! to prepare the next time_step: |
---|
| 45 | !! (trb) = (trn) + atfp [ (trb) + (tra) - 2 (trn) ] |
---|
| 46 | !! (trn) = (tra) ; (tra) = (0,0) |
---|
| 47 | !! |
---|
| 48 | !! |
---|
| 49 | !! ** Action : - update trb, trn |
---|
| 50 | !! |
---|
| 51 | !! History : |
---|
| 52 | !! 7.0 ! 91-11 (G. Madec) Original code |
---|
| 53 | !! ! 93-03 (M. Guyon) symetrical conditions |
---|
| 54 | !! ! 95-02 (M. Levy) passive tracers |
---|
| 55 | !! ! 96-02 (G. Madec & M. Imbard) opa release 8.0 |
---|
| 56 | !! 8.0 ! 96-04 (A. Weaver) Euler forward step |
---|
| 57 | !! 8.2 ! 99-02 (G. Madec, N. Grima) semi-implicit pressure grad. |
---|
| 58 | !! 8.5 ! 02-08 (G. Madec) F90: Free form and module |
---|
| 59 | !! ! 02-11 (C. Talandier, A-M Treguier) Open boundaries |
---|
| 60 | !! 9.0 ! 04-03 (C. Ethe) passive tracers |
---|
| 61 | !!---------------------------------------------------------------------- |
---|
| 62 | !! * Arguments |
---|
| 63 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
---|
| 64 | !! * Local declarations |
---|
| 65 | INTEGER :: ji, jj, jk,jn ! dummy loop indices |
---|
[202] | 66 | REAL(wp) :: zfact, ztra ! temporary scalar |
---|
[186] | 67 | !!---------------------------------------------------------------------- |
---|
| 68 | |
---|
| 69 | IF( kt == nittrc000 ) THEN |
---|
| 70 | WRITE(numout,*) |
---|
| 71 | WRITE(numout,*) 'trc_nxt : time stepping on passive tracers' |
---|
| 72 | ENDIF |
---|
| 73 | |
---|
| 74 | |
---|
| 75 | DO jn = 1, jptra |
---|
| 76 | |
---|
| 77 | ! 0. Lateral boundary conditions on tra (T-point, unchanged sign) |
---|
| 78 | ! ---------------------------------============ |
---|
| 79 | CALL lbc_lnk( tra(:,:,:,jn), 'T', 1. ) |
---|
| 80 | |
---|
| 81 | ! ! =============== |
---|
| 82 | DO jk = 1, jpk ! Horizontal slab |
---|
| 83 | ! ! =============== |
---|
| 84 | ! 1. Leap-frog scheme (only in explicit case, otherwise the |
---|
| 85 | ! ------------------- time stepping is already done in trczdf) |
---|
| 86 | IF( l_trczdf_exp .AND. ( ln_trcadv_cen2 .OR. ln_trcadv_tvd) ) THEN |
---|
| 87 | zfact = 2. * rdttra(jk) * FLOAT(ndttrc) |
---|
| 88 | IF( neuler == 0 .AND. kt == nittrc000 ) zfact = rdttra(jk) * FLOAT(ndttrc) |
---|
| 89 | tra(:,:,jk,jn) = ( trb(:,:,jk,jn) + zfact * tra(:,:,jk,jn) ) * tmask(:,:,jk) |
---|
| 90 | ENDIF |
---|
| 91 | |
---|
| 92 | END DO |
---|
| 93 | |
---|
| 94 | #if defined key_obc |
---|
[202] | 95 | IF(lwp) WRITE(numout,cform_err) |
---|
| 96 | IF(lwp) WRITE(numout,*) ' Passive tracers and Open Boundary condition can not be used together ' |
---|
| 97 | IF(lwp) WRITE(numout,*) ' Check in trc_nxt routine' |
---|
| 98 | nstop = nstop + 1 |
---|
[186] | 99 | #endif |
---|
| 100 | |
---|
| 101 | DO jk = 1, jpk |
---|
| 102 | |
---|
| 103 | ! 2. Time filter and swap of arrays |
---|
| 104 | ! --------------------------------- |
---|
| 105 | IF ( ln_trcadv_cen2 .OR. ln_trcadv_tvd ) THEN |
---|
| 106 | |
---|
| 107 | IF( neuler == 0 .AND. kt == nittrc000 ) THEN |
---|
| 108 | DO jj = 1, jpj |
---|
| 109 | DO ji = 1, jpi |
---|
| 110 | trb(ji,jj,jk,jn) = trn(ji,jj,jk,jn) |
---|
| 111 | trn(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
---|
| 112 | tra(ji,jj,jk,jn) = 0. |
---|
| 113 | END DO |
---|
| 114 | END DO |
---|
| 115 | ELSE |
---|
| 116 | DO jj = 1, jpj |
---|
| 117 | DO ji = 1, jpi |
---|
| 118 | trb(ji,jj,jk,jn) = atfp * ( trb(ji,jj,jk,jn) + tra(ji,jj,jk,jn) ) + atfp1 * trn(ji,jj,jk,jn) |
---|
| 119 | trn(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
---|
| 120 | tra(ji,jj,jk,jn) = 0. |
---|
| 121 | END DO |
---|
| 122 | END DO |
---|
| 123 | ENDIF |
---|
| 124 | |
---|
| 125 | ELSE |
---|
| 126 | ! case of smolar scheme or muscl |
---|
| 127 | DO jj = 1, jpj |
---|
| 128 | DO ji = 1, jpi |
---|
| 129 | trb(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
---|
| 130 | trn(ji,jj,jk,jn) = tra(ji,jj,jk,jn) |
---|
| 131 | tra(ji,jj,jk,jn) = 0. |
---|
| 132 | END DO |
---|
| 133 | END DO |
---|
| 134 | |
---|
| 135 | ENDIF |
---|
| 136 | ! ! =============== |
---|
| 137 | END DO ! End of slab |
---|
| 138 | ! ! =============== |
---|
[202] | 139 | IF(l_ctl) THEN ! print mean field (used for debugging) |
---|
| 140 | ztra = SUM( trn(2:nictl,2:njctl,1:jpkm1,jn)*tmask(2:nictl,2:njctl,1:jpkm1) ) |
---|
| 141 | WRITE(numout,*) ' trc/nxt - ',ctrcnm(jn),' : ', ztra |
---|
[186] | 142 | ENDIF |
---|
| 143 | |
---|
| 144 | END DO |
---|
| 145 | |
---|
| 146 | END SUBROUTINE trc_nxt |
---|
| 147 | |
---|
| 148 | #else |
---|
| 149 | !!---------------------------------------------------------------------- |
---|
| 150 | !! Default option Empty module |
---|
| 151 | !!---------------------------------------------------------------------- |
---|
| 152 | CONTAINS |
---|
| 153 | SUBROUTINE trc_nxt( kt ) |
---|
| 154 | INTEGER, INTENT(in) :: kt |
---|
| 155 | WRITE(*,*) 'trc_nxt: You should not have seen this print! error?', kt |
---|
| 156 | END SUBROUTINE trc_nxt |
---|
| 157 | #endif |
---|
| 158 | !!====================================================================== |
---|
| 159 | END MODULE trcnxt |
---|