1 | MODULE updtide |
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2 | !!====================================================================== |
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3 | !! *** MODULE updtide *** |
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4 | !! Initialization of tidal forcing |
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5 | !!====================================================================== |
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6 | !! History : 9.0 ! 07 (O. Le Galloudec) Original code |
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7 | !!---------------------------------------------------------------------- |
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8 | !! upd_tide : update tidal potential |
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9 | !!---------------------------------------------------------------------- |
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10 | USE oce ! ocean dynamics and tracers variables |
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11 | USE dom_oce ! ocean space and time domain |
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12 | USE in_out_manager ! I/O units |
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13 | USE phycst ! physical constant |
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14 | USE sbctide ! tide potential variable |
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15 | USE tideini, ONLY: ln_tide_ramp, rdttideramp |
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16 | |
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17 | IMPLICIT NONE |
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18 | PUBLIC |
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19 | |
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20 | PUBLIC upd_tide ! called in dynspg_... modules |
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21 | |
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22 | !!---------------------------------------------------------------------- |
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23 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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24 | !! $Id$ |
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25 | !! Software governed by the CeCILL license (see ./LICENSE) |
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26 | !!---------------------------------------------------------------------- |
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27 | CONTAINS |
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28 | |
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29 | SUBROUTINE upd_tide( kt, kit, kt_offset ) |
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30 | !!---------------------------------------------------------------------- |
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31 | !! *** ROUTINE upd_tide *** |
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32 | !! |
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33 | !! ** Purpose : provide at each time step the astronomical potential |
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34 | !! |
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35 | !! ** Method : computed from pulsation and amplitude of all tide components |
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36 | !! |
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37 | !! ** Action : pot_astro actronomical potential |
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38 | !!---------------------------------------------------------------------- |
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39 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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40 | INTEGER, INTENT(in), OPTIONAL :: kit ! external mode sub-time-step index (lk_dynspg_ts=T) |
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41 | INTEGER, INTENT(in), OPTIONAL :: kt_offset ! time offset in number |
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42 | ! of internal steps (lk_dynspg_ts=F) |
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43 | ! of external steps (lk_dynspg_ts=T) |
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44 | ! |
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45 | INTEGER :: ioffset ! local integer |
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46 | INTEGER :: ji, jj, jk ! dummy loop indices |
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47 | REAL(wp) :: zt, zramp ! local scalar |
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48 | REAL(wp), DIMENSION(nb_harmo) :: zwt |
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49 | !!---------------------------------------------------------------------- |
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50 | ! |
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51 | ! ! tide pulsation at model time step (or sub-time-step) |
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52 | zt = ( kt - kt_tide ) * rdt |
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53 | ! |
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54 | ioffset = 0 |
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55 | IF( PRESENT( kt_offset ) ) ioffset = kt_offset |
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56 | ! |
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57 | IF( PRESENT( kit ) ) THEN |
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58 | zt = zt + ( kit + ioffset - 1 ) * rdt / REAL( nn_baro, wp ) |
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59 | ELSE |
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60 | zt = zt + ioffset * rdt |
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61 | ENDIF |
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62 | ! |
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63 | zwt(:) = omega_tide(:) * zt |
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64 | |
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65 | pot_astro(:,:) = 0._wp ! update tidal potential (sum of all harmonics) |
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66 | DO jk = 1, nb_harmo |
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67 | pot_astro(:,:) = pot_astro(:,:) + amp_pot(:,:,jk) * COS( zwt(jk) + phi_pot(:,:,jk) ) |
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68 | END DO |
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69 | ! |
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70 | IF( ln_tide_ramp ) THEN ! linear increase if asked |
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71 | zt = ( kt - nit000 ) * rdt |
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72 | IF( PRESENT( kit ) ) zt = zt + ( kit + ioffset -1) * rdt / REAL( nn_baro, wp ) |
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73 | zramp = MIN( MAX( zt / (rdttideramp*rday) , 0._wp ) , 1._wp ) |
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74 | pot_astro(:,:) = zramp * pot_astro(:,:) |
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75 | ENDIF |
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76 | ! |
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77 | END SUBROUTINE upd_tide |
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78 | |
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79 | !!====================================================================== |
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80 | |
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81 | END MODULE updtide |
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