| 1 | MODULE obctra |
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| 2 | !!================================================================================= |
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| 3 | !! *** MODULE obctra *** |
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| 4 | !! Ocean tracers: Radiation of tracers on each open boundary |
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| 5 | !!================================================================================= |
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| 6 | #if defined key_obc |
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| 7 | !!--------------------------------------------------------------------------------- |
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| 8 | !! 'key_obc' : Open Boundary Conditions |
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| 9 | !!--------------------------------------------------------------------------------- |
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| 10 | !! obc_tra : call the subroutine for each open boundary |
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| 11 | !! obc_tra_east : radiation of the east open boundary tracers |
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| 12 | !! obc_tra_west : radiation of the west open boundary tracers |
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| 13 | !! obc_tra_north : radiation of the north open boundary tracers |
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| 14 | !! obc_tra_south : radiation of the south open boundary tracers |
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| 15 | !!---------------------------------------------------------------------------------- |
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| 16 | !! * Modules used |
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| 17 | USE oce ! ocean dynamics and tracers variables |
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| 18 | USE dom_oce ! ocean space and time domain variables |
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| 19 | USE phycst ! physical constants |
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| 20 | USE obc_oce ! ocean open boundary conditions |
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| 21 | USE lib_mpp ! ??? |
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| 22 | USE lbclnk ! ??? |
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| 23 | USE in_out_manager ! I/O manager |
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| 24 | |
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| 25 | IMPLICIT NONE |
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| 26 | PRIVATE |
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| 27 | |
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| 28 | !! * Accessibility |
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| 29 | PUBLIC obc_tra ! routine called in tranxt.F90 |
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| 30 | |
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| 31 | !! * Module variables |
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| 32 | INTEGER :: & ! ... boundary space indices |
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| 33 | nib = 1, & ! nib = boundary point |
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| 34 | nibm = 2, & ! nibm = 1st interior point |
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| 35 | nibm2 = 3, & ! nibm2 = 2nd interior point |
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| 36 | ! ... boundary time indices |
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| 37 | nit = 1, & ! nit = now |
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| 38 | nitm = 2, & ! nitm = before |
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| 39 | nitm2 = 3 ! nitm2 = before-before |
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| 40 | |
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| 41 | REAL(wp) :: & |
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| 42 | rtaue , rtauw , rtaun , rtaus , & ! Boundary restoring coefficient |
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| 43 | rtauein, rtauwin, rtaunin, rtausin ! Boundary restoring coefficient for inflow |
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| 44 | |
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| 45 | LOGICAL :: ll_fbc |
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| 46 | |
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| 47 | !! * Substitutions |
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| 48 | # include "obc_vectopt_loop_substitute.h90" |
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| 49 | !!--------------------------------------------------------------------------------- |
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| 50 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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| 51 | !! $Id$ |
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| 52 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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| 53 | !!--------------------------------------------------------------------------------- |
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| 54 | |
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| 55 | CONTAINS |
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| 56 | |
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| 57 | SUBROUTINE obc_tra( kt ) |
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| 58 | !!------------------------------------------------------------------------------- |
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| 59 | !! *** SUBROUTINE obc_tra *** |
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| 60 | !! |
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| 61 | !! ** Purpose : Compute tracer fields (t,s) along the open boundaries. |
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| 62 | !! This routine is called by the tranxt.F routine and updates ta,sa |
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| 63 | !! which are the actual temperature and salinity fields. |
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| 64 | !! The logical variable lp_obc_east, and/or lp_obc_west, and/or lp_obc_north, |
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| 65 | !! and/or lp_obc_south allow the user to determine which boundary is an |
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| 66 | !! open one (must be done in the param_obc.h90 file). |
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| 67 | !! |
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| 68 | !! Reference : |
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| 69 | !! Marchesiello P., 1995, these de l'universite J. Fourier, Grenoble, France. |
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| 70 | !! |
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| 71 | !! History : |
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| 72 | !! ! 95-03 (J.-M. Molines) Original, SPEM |
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| 73 | !! ! 97-07 (G. Madec, J.-M. Molines) addition |
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| 74 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
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| 75 | !!---------------------------------------------------------------------- |
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| 76 | !! * Arguments |
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| 77 | INTEGER, INTENT( in ) :: kt |
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| 78 | !!---------------------------------------------------------------------- |
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| 79 | |
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| 80 | ! 0. Local constant initialization |
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| 81 | |
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| 82 | IF( kt == nit000 .OR. ln_rstart) THEN |
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| 83 | ! ... Boundary restoring coefficient |
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| 84 | rtaue = 2. * rdt / rdpeob |
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| 85 | rtauw = 2. * rdt / rdpwob |
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| 86 | rtaun = 2. * rdt / rdpnob |
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| 87 | rtaus = 2. * rdt / rdpsob |
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| 88 | ! ... Boundary restoring coefficient for inflow ( all boundaries) |
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| 89 | rtauein = 2. * rdt / rdpein |
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| 90 | rtauwin = 2. * rdt / rdpwin |
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| 91 | rtaunin = 2. * rdt / rdpnin |
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| 92 | rtausin = 2. * rdt / rdpsin |
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| 93 | END IF |
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| 94 | |
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| 95 | ll_fbc = ( ( kt < nit000+3 ) .AND. .NOT. ln_rstart ) |
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| 96 | |
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| 97 | IF ( cp_cfg == "indian" ) THEN |
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| 98 | ll_fbc = ( ( kt < nit000+30 ) .AND. .NOT. ln_obc_rstart ) |
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| 99 | ENDIF |
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| 100 | |
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| 101 | IF( lp_obc_east ) CALL obc_tra_east ! East open boundary |
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| 102 | |
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| 103 | IF( lp_obc_west ) CALL obc_tra_west ! West open boundary |
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| 104 | |
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| 105 | IF( lp_obc_north ) CALL obc_tra_north ! North open boundary |
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| 106 | |
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| 107 | IF( lp_obc_south ) CALL obc_tra_south ! South open boundary |
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| 108 | |
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| 109 | |
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| 110 | IF( lk_mpp ) THEN !!bug ??? |
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| 111 | IF( kt >= nit000+3 .AND. ln_rstart ) THEN |
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| 112 | CALL lbc_lnk( tb, 'T', 1. ) |
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| 113 | CALL lbc_lnk( sb, 'T', 1. ) |
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| 114 | END IF |
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| 115 | CALL lbc_lnk( ta, 'T', 1. ) |
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| 116 | CALL lbc_lnk( sa, 'T', 1. ) |
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| 117 | ENDIF |
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| 118 | |
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| 119 | END SUBROUTINE obc_tra |
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| 120 | |
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| 121 | |
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| 122 | SUBROUTINE obc_tra_east |
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| 123 | !!------------------------------------------------------------------------------ |
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| 124 | !! *** SUBROUTINE obc_tra_east *** |
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| 125 | !! |
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| 126 | !! ** Purpose : |
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| 127 | !! Apply the radiation algorithm on east OBC tracers ta, sa using the |
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| 128 | !! phase velocities calculated in obc_rad_east subroutine in obcrad.F90 module |
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| 129 | !! If the logical lfbceast is .TRUE., there is no radiation but only fixed OBC |
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| 130 | !! |
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| 131 | !! History : |
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| 132 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
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| 133 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
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| 134 | !! ! 97-12 (M. Imbard) Mpp adaptation |
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| 135 | !! ! 00-06 (J.-M. Molines) |
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| 136 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
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| 137 | !!------------------------------------------------------------------------------ |
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| 138 | !! * Arguments |
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| 139 | |
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| 140 | !! * Local declaration |
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| 141 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 142 | REAL(wp) :: z05cx, ztau, zin |
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| 143 | !!------------------------------------------------------------------------------ |
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| 144 | |
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| 145 | ! 1. First three time steps and more if lfbceast is .TRUE. |
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| 146 | ! In that case open boundary conditions are FIXED. |
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| 147 | ! -------------------------------------------------------- |
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| 148 | |
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| 149 | IF ( ll_fbc .OR. lfbceast ) THEN |
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| 150 | |
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| 151 | DO ji = fs_nie0+1, fs_nie1+1 ! Vector opt. |
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| 152 | DO jk = 1, jpkm1 |
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| 153 | DO jj = 1, jpj |
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| 154 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
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| 155 | tfoe(jj,jk)*temsk(jj,jk) |
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| 156 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
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| 157 | sfoe(jj,jk)*temsk(jj,jk) |
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| 158 | END DO |
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| 159 | END DO |
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| 160 | END DO |
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| 161 | |
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| 162 | ELSE |
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| 163 | |
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| 164 | ! 2. Beyond the fourth time step if lfbceast is .FALSE. |
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| 165 | ! ----------------------------------------------------- |
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| 166 | |
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| 167 | ! Temperature and salinity radiation |
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| 168 | ! ---------------------------------- |
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| 169 | ! |
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| 170 | ! nibm2 nibm nib |
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| 171 | ! | nibm | nib///|/// |
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| 172 | ! | | | |////|/// |
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| 173 | ! jj line --v----f----v----f----v--- |
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| 174 | ! | | | |////|/// |
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| 175 | ! | |/// // |
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| 176 | ! jj line T u T u/// T // |
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| 177 | ! | |/// // |
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| 178 | ! | | | |////|/// |
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| 179 | ! jj-1 line --v----f----v----f----v--- |
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| 180 | ! | | | |////|/// |
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| 181 | ! jpieob-1 jpieob / /// |
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| 182 | ! | | | |
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| 183 | ! jpieob-1 jpieob jpieob+1 |
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| 184 | ! |
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| 185 | ! ... radiative conditions + relaxation toward a climatology |
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| 186 | ! the phase velocity is taken as the phase velocity of the tangen- |
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| 187 | ! tial velocity (here vn), which have been saved in (u_cxebnd,v_cxebnd) |
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| 188 | ! ... (jpjedp1, jpjefm1), jpieob+1 |
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| 189 | DO ji = fs_nie0+1, fs_nie1+1 ! Vector opt. |
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| 190 | DO jk = 1, jpkm1 |
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| 191 | DO jj = 2, jpjm1 |
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| 192 | ! ... i-phase speed ratio (from averaged of v_cxebnd) |
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| 193 | z05cx = ( 0.5 * ( v_cxebnd(jj,jk) + v_cxebnd(jj-1,jk) ) ) / e1t(ji-1,jj) |
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| 194 | z05cx = min( z05cx, 1. ) |
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| 195 | ! ... z05cx=< 0, inflow zin=0, ztau=1 |
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| 196 | ! > 0, outflow zin=1, ztau=rtaue |
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| 197 | zin = sign( 1., z05cx ) |
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| 198 | zin = 0.5*( zin + abs(zin) ) |
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| 199 | ! ... for inflow rtauein is used for relaxation coefficient else rtaue |
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| 200 | ztau = (1.-zin ) * rtauein + zin * rtaue |
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| 201 | z05cx = z05cx * zin |
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| 202 | ! ... update ( ta, sa ) with radiative or climatological (t, s) |
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| 203 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
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| 204 | temsk(jj,jk) * ( ( 1. - z05cx - ztau ) & |
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| 205 | * tebnd(jj,jk,nib ,nitm) + 2.*z05cx & |
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| 206 | * tebnd(jj,jk,nibm,nit ) + ztau * tfoe (jj,jk) ) & |
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| 207 | / (1. + z05cx) |
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| 208 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - temsk(jj,jk)) + & |
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| 209 | temsk(jj,jk) * ( ( 1. - z05cx - ztau ) & |
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| 210 | * sebnd(jj,jk,nib ,nitm) + 2.*z05cx & |
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| 211 | * sebnd(jj,jk,nibm,nit ) + ztau * sfoe (jj,jk) ) & |
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| 212 | / (1. + z05cx) |
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| 213 | END DO |
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| 214 | END DO |
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| 215 | END DO |
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| 216 | |
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| 217 | END IF |
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| 218 | |
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| 219 | END SUBROUTINE obc_tra_east |
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| 220 | |
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| 221 | |
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| 222 | SUBROUTINE obc_tra_west |
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| 223 | !!------------------------------------------------------------------------------ |
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| 224 | !! *** SUBROUTINE obc_tra_west *** |
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| 225 | !! |
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| 226 | !! ** Purpose : |
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| 227 | !! Apply the radiation algorithm on west OBC tracers ta, sa using the |
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| 228 | !! phase velocities calculated in obc_rad_west subroutine in obcrad.F90 module |
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| 229 | !! If the logical lfbcwest is .TRUE., there is no radiation but only fixed OBC |
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| 230 | !! |
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| 231 | !! History : |
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| 232 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
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| 233 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
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| 234 | !! ! 97-12 (M. Imbard) Mpp adaptation |
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| 235 | !! ! 00-06 (J.-M. Molines) |
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| 236 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
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| 237 | !!------------------------------------------------------------------------------ |
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| 238 | !! * Arguments |
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| 239 | |
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| 240 | !! * Local declaration |
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| 241 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 242 | REAL(wp) :: z05cx, ztau, zin |
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| 243 | !!------------------------------------------------------------------------------ |
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| 244 | |
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| 245 | ! 1. First three time steps and more if lfbcwest is .TRUE. |
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| 246 | ! In that case open boundary conditions are FIXED. |
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| 247 | ! -------------------------------------------------------- |
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| 248 | |
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| 249 | IF ( ll_fbc .OR. lfbcwest ) THEN |
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| 250 | |
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| 251 | DO ji = fs_niw0, fs_niw1 ! Vector opt. |
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| 252 | DO jk = 1, jpkm1 |
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| 253 | DO jj = 1, jpj |
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| 254 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
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| 255 | tfow(jj,jk)*twmsk(jj,jk) |
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| 256 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
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| 257 | sfow(jj,jk)*twmsk(jj,jk) |
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| 258 | END DO |
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| 259 | END DO |
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| 260 | END DO |
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| 261 | |
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| 262 | ELSE |
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| 263 | |
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| 264 | ! 2. Beyond the fourth time step if lfbcwest is .FALSE. |
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| 265 | ! ----------------------------------------------------- |
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| 266 | |
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| 267 | ! Temperature and salinity radiation |
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| 268 | ! ---------------------------------- |
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| 269 | ! |
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| 270 | ! nib nibm nibm2 |
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| 271 | ! nib///| nibm | nibm2 | |
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| 272 | ! ///|////| | | | | |
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| 273 | ! ---v----f----v----f----v----f-- jj line |
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| 274 | ! ///|////| | | | | |
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| 275 | ! // ///| | | |
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| 276 | ! // T ///u T u T u jj line |
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| 277 | ! // ///| | | |
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| 278 | ! ///|////| | | | | |
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| 279 | ! ---v----f----v----f----v----f-- jj-1 line |
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| 280 | ! ///|////| | | | | |
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| 281 | ! jpiwob jpiwob+1 jpiwob+2 |
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| 282 | ! | | | |
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| 283 | ! jpiwob jpiwob+1 jpiwob+2 |
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| 284 | ! |
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| 285 | ! ... radiative conditions + relaxation toward a climatology |
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| 286 | ! ... the phase velocity is taken as the phase velocity of the tangen- |
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| 287 | ! ... tial velocity (here vn), which have been saved in (v_cxwbnd) |
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| 288 | DO ji = fs_niw0, fs_niw1 ! Vector opt. |
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| 289 | DO jk = 1, jpkm1 |
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| 290 | DO jj = 2, jpjm1 |
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| 291 | ! ... i-phase speed ratio (from averaged of v_cxwbnd) |
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| 292 | z05cx = ( 0.5 * ( v_cxwbnd(jj,jk) + v_cxwbnd(jj-1,jk) ) ) / e1t(ji+1,jj) |
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| 293 | z05cx = max( z05cx, -1. ) |
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| 294 | ! ... z05cx > 0, inflow zin=0, ztau=1 |
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| 295 | ! < 0, outflow zin=1, ztau=rtauw |
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| 296 | zin = sign( 1., -1.* z05cx ) |
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| 297 | zin = 0.5*( zin + abs(zin) ) |
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| 298 | ztau = (1.-zin )*rtauwin + zin * rtauw |
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| 299 | z05cx = z05cx * zin |
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| 300 | ! ... update (ta,sa) with radiative or climatological (t, s) |
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| 301 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
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| 302 | twmsk(jj,jk) * ( ( 1. + z05cx - ztau ) & |
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| 303 | * twbnd(jj,jk,nib ,nitm) - 2.*z05cx & |
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| 304 | * twbnd(jj,jk,nibm,nit ) + ztau * tfow (jj,jk) ) & |
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| 305 | / (1. - z05cx) |
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| 306 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1. - twmsk(jj,jk)) + & |
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| 307 | twmsk(jj,jk) * ( ( 1. + z05cx - ztau ) & |
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| 308 | * swbnd(jj,jk,nib ,nitm) - 2.*z05cx & |
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| 309 | * swbnd(jj,jk,nibm,nit ) + ztau * sfow (jj,jk) ) & |
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| 310 | / (1. - z05cx) |
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| 311 | END DO |
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| 312 | END DO |
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| 313 | END DO |
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| 314 | |
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| 315 | END IF |
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| 316 | |
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| 317 | END SUBROUTINE obc_tra_west |
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| 318 | |
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| 319 | |
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| 320 | SUBROUTINE obc_tra_north |
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| 321 | !!------------------------------------------------------------------------------ |
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| 322 | !! *** SUBROUTINE obc_tra_north *** |
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| 323 | !! |
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| 324 | !! ** Purpose : |
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| 325 | !! Apply the radiation algorithm on north OBC tracers ta, sa using the |
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| 326 | !! phase velocities calculated in obc_rad_north subroutine in obcrad.F90 module |
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| 327 | !! If the logical lfbcnorth is .TRUE., there is no radiation but only fixed OBC |
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| 328 | !! |
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| 329 | !! History : |
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| 330 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
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| 331 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
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| 332 | !! ! 97-12 (M. Imbard) Mpp adaptation |
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| 333 | !! ! 00-06 (J.-M. Molines) |
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| 334 | !! 8.5 ! 02-10 (C. Talandier, A-M. Treguier) F90 |
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| 335 | !!------------------------------------------------------------------------------ |
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| 336 | !! * Arguments |
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| 337 | |
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| 338 | !! * Local declaration |
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| 339 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 340 | REAL(wp) :: z05cx, ztau, zin |
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| 341 | !!------------------------------------------------------------------------------ |
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| 342 | |
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| 343 | ! 1. First three time steps and more if lfbcnorth is .TRUE. |
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| 344 | ! In that case open boundary conditions are FIXED. |
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| 345 | ! -------------------------------------------------------- |
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| 346 | |
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| 347 | IF ( ll_fbc .OR. lfbcnorth ) THEN |
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| 348 | |
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| 349 | DO jj = fs_njn0+1, fs_njn1+1 ! Vector opt. |
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| 350 | DO jk = 1, jpkm1 |
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| 351 | DO ji = 1, jpi |
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| 352 | ta(ji,jj,jk)= ta(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
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| 353 | tnmsk(ji,jk) * tfon(ji,jk) |
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| 354 | sa(ji,jj,jk)= sa(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
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| 355 | tnmsk(ji,jk) * sfon(ji,jk) |
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| 356 | END DO |
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| 357 | END DO |
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| 358 | END DO |
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| 359 | |
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| 360 | ELSE |
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| 361 | |
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| 362 | ! 2. Beyond the fourth time step if lfbcnorth is .FALSE. |
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| 363 | ! ------------------------------------------------------- |
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| 364 | |
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| 365 | ! Temperature and salinity radiation |
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| 366 | ! ---------------------------------- |
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| 367 | ! |
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| 368 | ! ji-1 ji ji ji +1 |
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| 369 | ! | |
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| 370 | ! nib //// u // T // u // T // jpjnob + 1 |
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| 371 | ! /////|////////////////// |
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| 372 | ! nib ----f----v----f----v--- jpjnob |
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| 373 | ! | | |
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| 374 | ! nibm-- u -- T -- u -- T -- jpjnob |
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| 375 | ! | | |
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| 376 | ! nibm ----f----v----f----v--- jpjnob-1 |
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| 377 | ! | | |
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| 378 | ! nibm2-- u -- T -- T -- T -- jpjnob-1 |
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| 379 | ! | | |
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| 380 | ! nibm2 ----f----v----f----v--- jpjnob-2 |
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| 381 | ! | | |
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| 382 | ! |
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| 383 | ! ... radiative conditions + relaxation toward a climatology |
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| 384 | ! ... the phase velocity is taken as the normal phase velocity of the tangen- |
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| 385 | ! ... tial velocity (here un), which has been saved in (u_cynbnd) |
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| 386 | ! ... jpjnob+1,(jpindp1, jpinfm1) |
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| 387 | DO jj = fs_njn0+1, fs_njn1+1 ! Vector opt. |
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| 388 | DO jk = 1, jpkm1 |
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| 389 | DO ji = 2, jpim1 |
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| 390 | ! ... j-phase speed ratio (from averaged of vtnbnd) |
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| 391 | ! (bounded by 1) |
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| 392 | z05cx = ( 0.5 * ( u_cynbnd(ji,jk) + u_cynbnd(ji-1,jk) ) ) / e2t(ji,jj-1) |
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| 393 | z05cx = min( z05cx, 1. ) |
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| 394 | ! ... z05cx=< 0, inflow zin=0, ztau=1 |
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| 395 | ! > 0, outflow zin=1, ztau=rtaun |
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| 396 | zin = sign( 1., z05cx ) |
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| 397 | zin = 0.5*( zin + abs(zin) ) |
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| 398 | ! ... for inflow rtaunin is used for relaxation coefficient else rtaun |
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| 399 | ztau = (1.-zin ) * rtaunin + zin * rtaun |
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| 400 | z05cx = z05cx * zin |
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| 401 | ! ... update (ta,sa) with radiative or climatological (t, s) |
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| 402 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
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| 403 | tnmsk(ji,jk) * ( ( 1. - z05cx - ztau ) & |
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| 404 | * tnbnd(ji,jk,nib ,nitm) + 2.*z05cx & |
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| 405 | * tnbnd(ji,jk,nibm,nit ) + ztau * tfon (ji,jk) ) & |
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| 406 | / (1. + z05cx) |
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| 407 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1.-tnmsk(ji,jk)) + & |
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| 408 | tnmsk(ji,jk) * ( ( 1. - z05cx - ztau ) & |
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| 409 | * snbnd(ji,jk,nib ,nitm) + 2.*z05cx & |
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| 410 | * snbnd(ji,jk,nibm,nit ) + ztau * sfon (ji,jk) ) & |
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| 411 | / (1. + z05cx) |
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| 412 | END DO |
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| 413 | END DO |
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| 414 | END DO |
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| 415 | |
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| 416 | END IF |
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| 417 | |
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| 418 | END SUBROUTINE obc_tra_north |
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| 419 | |
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| 420 | |
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| 421 | SUBROUTINE obc_tra_south |
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| 422 | !!------------------------------------------------------------------------------ |
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| 423 | !! *** SUBROUTINE obc_tra_south *** |
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| 424 | !! |
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| 425 | !! ** Purpose : |
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| 426 | !! Apply the radiation algorithm on south OBC tracers ta, sa using the |
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| 427 | !! phase velocities calculated in obc_rad_south subroutine in obcrad.F90 module |
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| 428 | !! If the logical lfbcsouth is .TRUE., there is no radiation but only fixed OBC |
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| 429 | !! |
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| 430 | !! History : |
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| 431 | !! ! 95-03 (J.-M. Molines) Original from SPEM |
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| 432 | !! ! 97-07 (G. Madec, J.-M. Molines) additions |
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| 433 | !! ! 97-12 (M. Imbard) Mpp adaptation |
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| 434 | !! ! 00-06 (J.-M. Molines) |
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| 435 | !! 8.5 ! 02-10 (C. Talandier, A-M Treguier) F90 |
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| 436 | !!------------------------------------------------------------------------------ |
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| 437 | !! * Arguments |
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| 438 | |
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| 439 | !! * Local declaration |
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| 440 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 441 | REAL(wp) :: z05cx, ztau, zin |
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| 442 | !!------------------------------------------------------------------------------ |
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| 443 | |
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| 444 | ! 1. First three time steps and more if lfbcsouth is .TRUE. |
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| 445 | ! In that case open boundary conditions are FIXED. |
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| 446 | ! -------------------------------------------------------- |
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| 447 | |
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| 448 | IF ( ll_fbc .OR. lfbcsouth ) THEN |
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| 449 | |
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| 450 | DO jj = fs_njs0, fs_njs1 ! Vector opt. |
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| 451 | DO jk = 1, jpkm1 |
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| 452 | DO ji = 1, jpi |
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| 453 | ta(ji,jj,jk)= ta(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
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| 454 | tsmsk(ji,jk) * tfos(ji,jk) |
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| 455 | sa(ji,jj,jk)= sa(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
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| 456 | tsmsk(ji,jk) * sfos(ji,jk) |
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| 457 | END DO |
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| 458 | END DO |
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| 459 | END DO |
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| 460 | |
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| 461 | ELSE |
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| 462 | |
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| 463 | ! 2. Beyond the fourth time step if lfbcsouth is .FALSE. |
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| 464 | ! ------------------------------------------------------- |
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| 465 | |
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| 466 | ! Temperature and salinity radiation |
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| 467 | ! ---------------------------------- |
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| 468 | ! |
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| 469 | ! ji-1 ji ji ji +1 |
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| 470 | ! | | |
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| 471 | ! nibm2 ----f----v----f----v--- jpjsob+2 |
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| 472 | ! | | |
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| 473 | ! nibm2 -- u -- T -- u -- T -- jpjsob+2 |
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| 474 | ! | | |
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| 475 | ! nibm ----f----v----f----v--- jpjsob+1 |
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| 476 | ! | | |
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| 477 | ! nibm -- u -- T -- T -- T -- jpjsob+1 |
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| 478 | ! | | |
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| 479 | ! nib -----f----v----f----v--- jpjsob |
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| 480 | ! //////|/////////|//////// |
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| 481 | ! nib //// u // T // u // T // jpjsob |
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| 482 | ! |
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| 483 | !... radiative conditions + relaxation toward a climatology |
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| 484 | !... the phase velocity is taken as the phase velocity of the tangen- |
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| 485 | !... tial velocity (here un), which has been saved in (u_cysbnd) |
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| 486 | !... jpjsob,(jpisdp1, jpisfm1) |
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| 487 | DO jj = fs_njs0, fs_njs1 ! Vector opt. |
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| 488 | DO jk = 1, jpkm1 |
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| 489 | DO ji = 2, jpim1 |
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| 490 | !... j-phase speed ratio (from averaged of u_cysbnd) |
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| 491 | ! (bounded by 1) |
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| 492 | z05cx = ( 0.5 * ( u_cysbnd(ji,jk) + u_cysbnd(ji-1,jk) ) ) / e2t(ji,jj+1) |
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| 493 | z05cx = max( z05cx, -1. ) |
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| 494 | !... z05cx > 0, inflow zin=0, ztau=1 |
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| 495 | ! < 0, outflow zin=1, ztau=rtaus |
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| 496 | zin = sign( 1., -1.* z05cx ) |
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| 497 | zin = 0.5*( zin + abs(zin) ) |
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| 498 | ztau = (1.-zin ) + zin * rtaus |
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| 499 | z05cx = z05cx * zin |
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| 500 | !... update (ta,sa) with radiative or climatological (t, s) |
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| 501 | ta(ji,jj,jk) = ta(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
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| 502 | tsmsk(ji,jk) * ( ( 1. + z05cx - ztau ) & |
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| 503 | * tsbnd(ji,jk,nib ,nitm) - 2.*z05cx & |
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| 504 | * tsbnd(ji,jk,nibm,nit ) + ztau * tfos (ji,jk) ) & |
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| 505 | / (1. - z05cx) |
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| 506 | sa(ji,jj,jk) = sa(ji,jj,jk) * (1.-tsmsk(ji,jk)) + & |
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| 507 | tsmsk(ji,jk) * ( ( 1. + z05cx - ztau ) & |
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| 508 | * ssbnd(ji,jk,nib ,nitm) - 2.*z05cx & |
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| 509 | * ssbnd(ji,jk,nibm,nit ) + ztau * sfos (ji,jk) ) & |
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| 510 | / (1. - z05cx) |
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| 511 | END DO |
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| 512 | END DO |
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| 513 | END DO |
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| 514 | |
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| 515 | END IF |
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| 516 | |
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| 517 | END SUBROUTINE obc_tra_south |
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| 518 | |
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| 519 | #else |
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| 520 | !!--------------------------------------------------------------------------------- |
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| 521 | !! Default option Empty module |
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| 522 | !!--------------------------------------------------------------------------------- |
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| 523 | CONTAINS |
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| 524 | SUBROUTINE obc_tra ! Empty routine |
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| 525 | END SUBROUTINE obc_tra |
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| 526 | #endif |
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| 527 | |
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| 528 | !!================================================================================= |
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| 529 | END MODULE obctra |
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