1 | MODULE dynbfr |
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2 | !!============================================================================== |
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3 | !! *** MODULE dynbfr *** |
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4 | !! Ocean dynamics : bottom friction component of the momentum mixing trend |
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5 | !!============================================================================== |
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6 | !! History : 9.0 ! 2008-11 (A. C. Coward) Original code |
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7 | !!---------------------------------------------------------------------- |
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8 | |
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9 | !!---------------------------------------------------------------------- |
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10 | !! dyn_bfr : Update the momentum trend with the bottom friction contribution |
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11 | !!---------------------------------------------------------------------- |
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12 | USE oce ! ocean dynamics and tracers variables |
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13 | USE dom_oce ! ocean space and time domain variables |
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14 | USE zdf_oce ! ocean vertical physics variables |
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15 | USE zdfbfr ! bottom friction |
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16 | |
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17 | USE trdmod ! ocean active dynamics and tracers trends |
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18 | USE trdmod_oce ! ocean variables trends |
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19 | USE in_out_manager ! I/O manager |
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20 | USE prtctl ! Print control |
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21 | |
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22 | IMPLICIT NONE |
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23 | PRIVATE |
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24 | |
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25 | PUBLIC dyn_bfr ! routine called by step.F90 |
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26 | |
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27 | !! * Substitutions |
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28 | # include "domzgr_substitute.h90" |
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29 | # include "zdfddm_substitute.h90" |
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30 | # include "vectopt_loop_substitute.h90" |
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31 | !!---------------------------------------------------------------------- |
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32 | !! NEMO/OPA 3.2 , LOCEAN-IPSL (2009) |
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33 | !! $Id: dynzdf.F90 1152 2008-06-26 14:11:13Z rblod $ |
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34 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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35 | !!---------------------------------------------------------------------- |
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36 | |
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37 | CONTAINS |
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38 | |
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39 | SUBROUTINE dyn_bfr( kt ) |
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40 | !!---------------------------------------------------------------------- |
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41 | !! *** ROUTINE dyn_bfr *** |
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42 | !! |
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43 | !! ** Purpose : compute the bottom friction ocean dynamics physics. |
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44 | !! |
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45 | !! ** Action : (ua,va) momentum trend increased by bottom friction trend |
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46 | !!--------------------------------------------------------------------- |
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47 | USE oce, ONLY : ztrdu => ta ! use ta as 3D workspace |
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48 | USE oce, ONLY : ztrdv => sa ! use sa as 3D workspace |
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49 | !! |
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50 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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51 | !! |
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52 | INTEGER :: ji, jj ! dummy loop indexes |
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53 | INTEGER :: ikbu , ikbv ! temporary integers |
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54 | INTEGER :: ikbum1, ikbvm1 ! - - |
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55 | REAL(wp) :: zinv, zbfru, zbfrv ! temporary scalar |
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56 | !!--------------------------------------------------------------------- |
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57 | ! |
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58 | zinv = -1. / ( 2.*rdt ) |
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59 | |
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60 | IF( l_trddyn ) THEN ! temporary save of ua and va trends |
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61 | ztrdu(:,:,:) = ua(:,:,:) |
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62 | ztrdv(:,:,:) = va(:,:,:) |
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63 | ENDIF |
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64 | |
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65 | # if defined key_vectopt_loop |
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66 | DO jj = 1, 1 |
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67 | DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
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68 | # else |
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69 | DO jj = 2, jpjm1 |
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70 | DO ji = 2, jpim1 |
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71 | # endif |
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72 | ikbu = MIN( mbathy(ji+1,jj), mbathy(ji,jj) ) |
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73 | ikbv = MIN( mbathy(ji,jj+1), mbathy(ji,jj) ) |
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74 | ikbum1 = MAX( ikbu-1, 1 ) |
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75 | ikbvm1 = MAX( ikbv-1, 1 ) |
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76 | ! |
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77 | ! Apply stability criteria on absolute value : Min abs(bfr) => Max (bfr) |
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78 | zbfru = MAX( bfrua(ji,jj), fse3u(ji,jj,ikbu)*zinv ) |
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79 | zbfrv = MAX( bfrva(ji,jj), fse3v(ji,jj,ikbv)*zinv ) |
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80 | ! |
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81 | ua(ji,jj,ikbum1) = ua(ji,jj,ikbum1) + zbfru * ub(ji,jj,ikbum1) / fse3u(ji,jj,ikbu) |
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82 | va(ji,jj,ikbvm1) = va(ji,jj,ikbvm1) + zbfrv * vb(ji,jj,ikbvm1) / fse3v(ji,jj,ikbv) |
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83 | ! |
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84 | END DO |
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85 | END DO |
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86 | |
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87 | ! |
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88 | IF( l_trddyn ) THEN ! save the vertical diffusive trends for further diagnostics |
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89 | ztrdu(:,:,:) = ua(:,:,:) - ztrdu(:,:,:) |
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90 | ztrdv(:,:,:) = va(:,:,:) - ztrdv(:,:,:) |
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91 | CALL trd_mod( ztrdu, ztrdv, jpdyn_trd_bfr, 'DYN', kt ) |
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92 | ENDIF |
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93 | ! ! print mean trends (used for debugging) |
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94 | IF(ln_ctl) CALL prt_ctl( tab3d_1=ua, clinfo1=' bfr - Ua: ', mask1=umask, & |
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95 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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96 | ! |
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97 | END SUBROUTINE dyn_bfr |
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98 | |
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99 | !!============================================================================== |
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100 | END MODULE dynbfr |
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