1 | MODULE obctra |
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2 | !!====================================================================== |
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3 | !! *** MODULE obctra *** |
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4 | !! Ocean tracers: Flow Relaxation Scheme of tracers on each open boundary |
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5 | !!====================================================================== |
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6 | !! History : 1.0 ! 2005-01 (J. Chanut, A. Sellar) Original code |
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7 | !! 3.0 ! 2008-04 (NEMO team) add in the reference version |
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8 | !!---------------------------------------------------------------------- |
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9 | #if defined key_obc |
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10 | !!---------------------------------------------------------------------- |
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11 | !! 'key_obc' Unstructured Open Boundary Conditions |
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12 | !!---------------------------------------------------------------------- |
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13 | !! obc_tra : Apply open boundary conditions to T and S |
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14 | !! obc_tra_frs : Apply Flow Relaxation Scheme |
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15 | !!---------------------------------------------------------------------- |
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16 | USE oce ! ocean dynamics and tracers variables |
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17 | USE dom_oce ! ocean space and time domain variables |
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18 | USE obc_oce ! ocean open boundary conditions |
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19 | USE obcdta, ONLY: bf |
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20 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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21 | USE in_out_manager ! I/O manager |
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22 | |
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23 | IMPLICIT NONE |
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24 | PRIVATE |
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25 | |
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26 | PUBLIC obc_tra ! routine called in tranxt.F90 |
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27 | |
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28 | !!---------------------------------------------------------------------- |
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29 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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30 | !! $Id$ |
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31 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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32 | !!---------------------------------------------------------------------- |
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33 | CONTAINS |
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34 | |
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35 | SUBROUTINE obc_tra( kt ) |
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36 | !!---------------------------------------------------------------------- |
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37 | !! *** SUBROUTINE obc_dyn3d *** |
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38 | !! |
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39 | !! ** Purpose : - Apply open boundary conditions for baroclinic velocities |
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40 | !! |
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41 | !!---------------------------------------------------------------------- |
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42 | INTEGER, INTENT( in ) :: kt ! Main time step counter |
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43 | !! |
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44 | INTEGER :: ib_obc ! Loop index |
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45 | |
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46 | DO ib_obc=1, nb_obc |
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47 | |
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48 | SELECT CASE( nn_tra(ib_obc) ) |
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49 | CASE(jp_none) |
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50 | CYCLE |
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51 | CASE(jp_frs) |
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52 | CALL obc_tra_frs( idx_obc(ib_obc), dta_obc(ib_obc), kt ) |
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53 | CASE DEFAULT |
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54 | CALL ctl_stop( 'obc_tra : unrecognised option for open boundaries for T and S' ) |
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55 | END SELECT |
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56 | ENDDO |
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57 | |
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58 | END SUBROUTINE obc_tra |
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59 | |
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60 | SUBROUTINE obc_tra_frs( idx, dta, kt ) |
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61 | !!---------------------------------------------------------------------- |
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62 | !! *** SUBROUTINE obc_tra_frs *** |
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63 | !! |
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64 | !! ** Purpose : Apply the Flow Relaxation Scheme for tracers at open boundaries. |
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65 | !! |
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66 | !! Reference : Engedahl H., 1995, Tellus, 365-382. |
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67 | !!---------------------------------------------------------------------- |
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68 | INTEGER, INTENT(in) :: kt |
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69 | TYPE(OBC_INDEX), INTENT(in) :: idx ! OBC indices |
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70 | TYPE(OBC_DATA), INTENT(in) :: dta ! OBC external data |
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71 | !! |
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72 | REAL(wp) :: zwgt ! boundary weight |
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73 | INTEGER :: ib, ik, igrd ! dummy loop indices |
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74 | INTEGER :: ii, ij ! 2D addresses |
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75 | !!---------------------------------------------------------------------- |
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76 | ! |
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77 | ! |
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78 | igrd = 1 ! Everything is at T-points here |
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79 | DO ib = 1, idx%nblen(igrd) |
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80 | DO ik = 1, jpkm1 |
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81 | ii = idx%nbi(ib,igrd) |
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82 | ij = idx%nbj(ib,igrd) |
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83 | zwgt = idx%nbw(ib,igrd) |
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84 | ta(ii,ij,ik) = ( ta(ii,ij,ik) + zwgt * ( dta%tem(ib,ik) - ta(ii,ij,ik) ) ) * tmask(ii,ij,ik) |
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85 | sa(ii,ij,ik) = ( sa(ii,ij,ik) + zwgt * ( dta%sal(ib,ik) - sa(ii,ij,ik) ) ) * tmask(ii,ij,ik) |
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86 | END DO |
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87 | END DO |
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88 | ! |
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89 | CALL lbc_lnk( ta, 'T', 1. ) ; CALL lbc_lnk( sa, 'T', 1. ) ! Boundary points should be updated |
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90 | ! |
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91 | IF( kt .eq. nit000 ) CLOSE( unit = 102 ) |
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92 | ! |
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93 | END SUBROUTINE obc_tra_frs |
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94 | |
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95 | #else |
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96 | !!---------------------------------------------------------------------- |
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97 | !! Dummy module NO Unstruct Open Boundary Conditions |
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98 | !!---------------------------------------------------------------------- |
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99 | CONTAINS |
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100 | SUBROUTINE obc_tra(kt) ! Empty routine |
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101 | WRITE(*,*) 'obc_tra: You should not have seen this print! error?', kt |
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102 | END SUBROUTINE obc_tra |
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103 | #endif |
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104 | |
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105 | !!====================================================================== |
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106 | END MODULE obctra |
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