1 | MODULE bdytra |
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2 | !!================================================================================= |
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3 | !! *** MODULE bdytra *** |
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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 | #if defined key_bdy |
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7 | !!--------------------------------------------------------------------------------- |
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8 | !! 'key_bdy' : Unstructured Open Boundary Conditions |
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9 | !!--------------------------------------------------------------------------------- |
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10 | !! bdy_tra : Relaxation of tracers on unstructured open boundaries |
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11 | !!--------------------------------------------------------------------------------- |
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12 | !! * Modules used |
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13 | USE oce ! ocean dynamics and tracers variables |
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14 | USE dom_oce ! ocean space and time domain variables |
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15 | USE bdy_oce ! ocean open boundary conditions |
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16 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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17 | |
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18 | IMPLICIT NONE |
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19 | PRIVATE |
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20 | |
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21 | !! * Accessibility |
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22 | PUBLIC bdy_tra ! routine called in tranxt.F90 |
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23 | |
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24 | !! * Substitutions |
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25 | |
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26 | !!--------------------------------------------------------------------------------- |
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27 | !! OPA 9.0 , LODYC-IPSL (2003) |
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28 | !!--------------------------------------------------------------------------------- |
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29 | |
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30 | CONTAINS |
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31 | |
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32 | SUBROUTINE bdy_tra( kt ) |
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33 | !!------------------------------------------------------------------------------ |
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34 | !! *** SUBROUTINE bdy_tra *** |
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35 | !! |
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36 | !! ** Purpose : Apply the Flow Relaxation Scheme for tracers in the |
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37 | !! case of unstructured open boundaries. |
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38 | !! |
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39 | !! Reference : Engedahl H., 1995: Use of the flow relaxation scheme in |
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40 | !! a three-dimensional baroclinic ocean model with realistic |
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41 | !! topography. Tellus, 365-382. |
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42 | !! History : |
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43 | !! 9.0 ! 05-01 (J. Chanut, A. Sellar) Original |
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44 | !!------------------------------------------------------------------------------ |
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45 | !! * Arguments |
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46 | INTEGER, INTENT( in ) :: kt |
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47 | |
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48 | !! * Local declarations |
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49 | REAL(wp) :: zwgt ! boundary weight |
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50 | INTEGER :: jb, jk, jgrd ! dummy loop indices |
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51 | INTEGER :: ii, ij ! 2D addresses |
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52 | !!------------------------------------------------------------------------------ |
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53 | |
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54 | jgrd=1 !: Everything is at T-points here |
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55 | |
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56 | DO jb = 1, nblen(jgrd) |
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57 | DO jk = 1, jpkm1 |
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58 | ii = nbi(jb,jgrd) |
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59 | ij = nbj(jb,jgrd) |
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60 | zwgt = nbw(jb,jgrd) |
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61 | |
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62 | ! Temperature relaxation at the boundary |
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63 | ta(ii,ij,jk) = ( ta(ii,ij,jk)*(1.-zwgt) + tbdy(jb,jk)*zwgt ) & |
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64 | * tmask(ii,ij,jk) |
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65 | |
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66 | ! Salinity relaxation at the boundary |
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67 | sa(ii,ij,jk) = ( sa(ii,ij,jk)*(1.-zwgt) + sbdy(jb,jk)*zwgt ) & |
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68 | * tmask(ii,ij,jk) |
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69 | |
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70 | END DO |
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71 | END DO |
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72 | |
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73 | CALL lbc_lnk( ta, 'T', 1. ) ! Boundary points should be updated |
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74 | CALL lbc_lnk( sa, 'T', 1. ) ! |
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75 | |
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76 | END SUBROUTINE bdy_tra |
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77 | #else |
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78 | !!--------------------------------------------------------------------------------- |
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79 | !! Default option Empty module |
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80 | !!--------------------------------------------------------------------------------- |
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81 | CONTAINS |
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82 | SUBROUTINE bdy_tra ! Empty routine |
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83 | END SUBROUTINE bdy_tra |
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84 | #endif |
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85 | |
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86 | !!================================================================================= |
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87 | END MODULE bdytra |
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