1 | MODULE bdytides |
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2 | !!====================================================================== |
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3 | !! *** MODULE bdytides *** |
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4 | !! Ocean dynamics: Tidal forcing at open boundaries |
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5 | !!====================================================================== |
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6 | !! History : 2.0 ! 2007-01 (D.Storkey) Original code |
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7 | !! 2.3 ! 2008-01 (J.Holt) Add date correction. Origins POLCOMS v6.3 2007 |
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8 | !! 3.0 ! 2008-04 (NEMO team) add in the reference version |
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9 | !! 3.3 ! 2010-09 (D.Storkey and E.O'Dea) bug fixes |
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10 | !!---------------------------------------------------------------------- |
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11 | #if defined key_bdy |
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12 | !!---------------------------------------------------------------------- |
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13 | !! 'key_bdy' Open Boundary Condition |
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14 | !!---------------------------------------------------------------------- |
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15 | !! PUBLIC |
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16 | !! bdytide_init : read of namelist and initialisation of tidal harmonics data |
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17 | !! tide_update : calculation of tidal forcing at each timestep |
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18 | !!---------------------------------------------------------------------- |
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19 | USE timing ! Timing |
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20 | USE oce ! ocean dynamics and tracers |
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21 | USE dom_oce ! ocean space and time domain |
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22 | USE iom |
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23 | USE in_out_manager ! I/O units |
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24 | USE phycst ! physical constants |
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25 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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26 | USE bdy_par ! Unstructured boundary parameters |
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27 | USE bdy_oce ! ocean open boundary conditions |
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28 | USE daymod ! calendar |
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29 | USE tideini |
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30 | USE tide_mod |
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31 | USE fldread, ONLY: fld_map |
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32 | |
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33 | IMPLICIT NONE |
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34 | PRIVATE |
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35 | |
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36 | PUBLIC bdytide_init ! routine called in nemo_init |
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37 | PUBLIC tide_update ! routine called in bdydyn |
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38 | |
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39 | TYPE, PUBLIC :: TIDES_DATA !: Storage for external tidal harmonics data |
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40 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ssh0 !: Tidal constituents : SSH0 (read in file) |
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41 | REAL(wp), POINTER, DIMENSION(:,:,:) :: u0 !: Tidal constituents : U0 (read in file) |
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42 | REAL(wp), POINTER, DIMENSION(:,:,:) :: v0 !: Tidal constituents : V0 (read in file) |
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43 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ssh !: Tidal constituents : SSH (after nodal cor.) |
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44 | REAL(wp), POINTER, DIMENSION(:,:,:) :: u !: Tidal constituents : U (after nodal cor.) |
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45 | REAL(wp), POINTER, DIMENSION(:,:,:) :: v !: Tidal constituents : V (after nodal cor.) |
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46 | END TYPE TIDES_DATA |
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47 | |
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48 | TYPE(TIDES_DATA), PUBLIC, DIMENSION(jp_bdy), TARGET :: tides !: External tidal harmonics data |
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49 | |
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50 | !!---------------------------------------------------------------------- |
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51 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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52 | !! $Id$ |
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53 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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54 | !!---------------------------------------------------------------------- |
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55 | CONTAINS |
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56 | |
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57 | SUBROUTINE bdytide_init |
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58 | !!---------------------------------------------------------------------- |
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59 | !! *** SUBROUTINE bdytide_init *** |
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60 | !! |
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61 | !! ** Purpose : - Read in namelist for tides and initialise external |
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62 | !! tidal harmonics data |
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63 | !! |
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64 | !!---------------------------------------------------------------------- |
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65 | !! namelist variables |
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66 | !!------------------- |
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67 | CHARACTER(len=80) :: filtide !: Filename root for tidal input files |
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68 | LOGICAL :: ln_conjug = .FALSE. !: F/T : tidal data in complex/complex conjugate |
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69 | !! |
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70 | INTEGER :: ib_bdy, itide, ib !: dummy loop indices |
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71 | INTEGER :: inum, igrd |
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72 | INTEGER, DIMENSION(3) :: ilen0 !: length of boundary data (from OBC arrays) |
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73 | CHARACTER(len=80) :: clfile !: full file name for tidal input file |
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74 | REAL(wp),ALLOCATABLE, DIMENSION(:,:,:) :: dta_read !: work space to read in tidal harmonics data |
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75 | !! |
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76 | TYPE(TIDES_DATA), POINTER :: td !: local short cut |
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77 | !! |
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78 | NAMELIST/nambdy_tide/filtide, ln_conjug |
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79 | !!---------------------------------------------------------------------- |
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80 | |
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81 | IF( nn_timing == 1 ) CALL timing_start('bdytide_init') |
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82 | |
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83 | IF(lwp) WRITE(numout,*) |
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84 | IF(lwp) WRITE(numout,*) 'bdytide_init : initialization of tidal harmonic forcing at open boundaries' |
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85 | IF(lwp) WRITE(numout,*) '~~~~~~~~~' |
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86 | |
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87 | REWIND(numnam) |
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88 | DO ib_bdy = 1, nb_bdy |
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89 | IF( nn_dyn2d_dta(ib_bdy) .ge. 2 ) THEN |
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90 | |
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91 | td => tides(ib_bdy) |
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92 | |
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93 | ! Namelist nambdy_tide : tidal harmonic forcing at open boundaries |
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94 | filtide(:) = '' |
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95 | |
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96 | ! Don't REWIND here - may need to read more than one of these namelists. |
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97 | READ ( numnam, nambdy_tide ) |
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98 | ! ! Parameter control and print |
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99 | IF(lwp) WRITE(numout,*) ' Namelist nambdy_tide : tidal harmonic forcing at open boundaries' |
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100 | IF(lwp) WRITE(numout,*) ' tidal components specified ', nb_harmo |
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101 | IF(lwp) WRITE(numout,*) ' ', Wave(ntide(1:nb_harmo))%cname_tide |
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102 | IF(lwp) WRITE(numout,*) ' associated phase speeds (deg/hr) : ' |
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103 | IF(lwp) WRITE(numout,*) ' ', omega_tide(1:nb_harmo) |
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104 | |
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105 | ! Allocate space for tidal harmonics data - get size from OBC data arrays |
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106 | ! ----------------------------------------------------------------------- |
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107 | |
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108 | ilen0(1) = SIZE( dta_bdy(ib_bdy)%ssh ) |
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109 | ALLOCATE( td%ssh0( ilen0(1), nb_harmo, 2 ) ) |
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110 | ALLOCATE( td%ssh ( ilen0(1), nb_harmo, 2 ) ) |
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111 | |
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112 | ilen0(2) = SIZE( dta_bdy(ib_bdy)%u2d ) |
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113 | ALLOCATE( td%u0( ilen0(2), nb_harmo, 2 ) ) |
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114 | ALLOCATE( td%u ( ilen0(2), nb_harmo, 2 ) ) |
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115 | |
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116 | ilen0(3) = SIZE( dta_bdy(ib_bdy)%v2d ) |
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117 | ALLOCATE( td%v0( ilen0(3), nb_harmo, 2 ) ) |
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118 | ALLOCATE( td%v ( ilen0(3), nb_harmo, 2 ) ) |
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119 | |
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120 | ALLOCATE( dta_read( MAXVAL(ilen0), 1, 1 ) ) |
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121 | |
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122 | ! Open files and read in tidal forcing data |
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123 | ! ----------------------------------------- |
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124 | |
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125 | DO itide = 1, nb_harmo |
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126 | ! ! SSH fields |
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127 | clfile = TRIM(filtide)//TRIM(Wave(ntide(itide))%cname_tide)//'_grid_T.nc' |
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128 | CALL iom_open( clfile, inum ) |
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129 | CALL fld_map( inum, 'z1' , dta_read(1:ilen0(1),1:1,1:1) , 1, idx_bdy(ib_bdy)%nbmap(:,1) ) |
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130 | td%ssh0(:,itide,1) = dta_read(1:ilen0(1),1,1) |
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131 | CALL fld_map( inum, 'z2' , dta_read(1:ilen0(1),1:1,1:1) , 1, idx_bdy(ib_bdy)%nbmap(:,1) ) |
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132 | td%ssh0(:,itide,2) = dta_read(1:ilen0(1),1,1) |
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133 | CALL iom_close( inum ) |
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134 | ! ! U fields |
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135 | clfile = TRIM(filtide)//TRIM(Wave(ntide(itide))%cname_tide)//'_grid_U.nc' |
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136 | CALL iom_open( clfile, inum ) |
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137 | CALL fld_map( inum, 'u1' , dta_read(1:ilen0(2),1:1,1:1) , 1, idx_bdy(ib_bdy)%nbmap(:,2) ) |
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138 | td%u0(:,itide,1) = dta_read(1:ilen0(2),1,1) |
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139 | CALL fld_map( inum, 'u2' , dta_read(1:ilen0(2),1:1,1:1) , 1, idx_bdy(ib_bdy)%nbmap(:,2) ) |
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140 | td%u0(:,itide,2) = dta_read(1:ilen0(2),1,1) |
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141 | CALL iom_close( inum ) |
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142 | ! ! V fields |
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143 | clfile = TRIM(filtide)//TRIM(Wave(ntide(itide))%cname_tide)//'_grid_V.nc' |
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144 | CALL iom_open( clfile, inum ) |
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145 | CALL fld_map( inum, 'v1' , dta_read(1:ilen0(3),1:1,1:1) , 1, idx_bdy(ib_bdy)%nbmap(:,3) ) |
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146 | td%v0(:,itide,1) = dta_read(1:ilen0(3),1,1) |
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147 | CALL fld_map( inum, 'v2' , dta_read(1:ilen0(3),1:1,1:1) , 1, idx_bdy(ib_bdy)%nbmap(:,3) ) |
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148 | td%v0(:,itide,2) = dta_read(1:ilen0(3),1,1) |
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149 | CALL iom_close( inum ) |
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150 | IF ( ln_conjug ) THEN |
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151 | IF(lwp) WRITE(numout,*) ' The tidal input data are written in complex conjugate' |
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152 | td%ssh0(:,itide,2) = - td%ssh0(:,itide,2) |
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153 | td%u0 (:,itide,2) = - td%u0 (:,itide,2) |
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154 | td%v0 (:,itide,2) = - td%v0 (:,itide,2) |
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155 | ENDIF |
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156 | ! |
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157 | END DO ! end loop on tidal components |
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158 | ! |
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159 | DEALLOCATE( dta_read ) |
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160 | ! |
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161 | ENDIF ! nn_dyn2d_dta(ib_bdy) .ge. 2 |
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162 | ! |
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163 | END DO ! loop on ib_bdy |
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164 | |
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165 | IF( nn_timing == 1 ) CALL timing_stop('bdytide_init') |
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166 | |
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167 | END SUBROUTINE bdytide_init |
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168 | |
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169 | SUBROUTINE tide_update ( kt, idx, dta, td, jit, time_offset ) |
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170 | !!---------------------------------------------------------------------- |
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171 | !! *** SUBROUTINE tide_update *** |
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172 | !! |
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173 | !! ** Purpose : - Add tidal forcing to ssh, u2d and v2d OBC data arrays. |
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174 | !! |
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175 | !!---------------------------------------------------------------------- |
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176 | INTEGER, INTENT( in ) :: kt ! Main timestep counter |
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177 | TYPE(OBC_INDEX), INTENT( in ) :: idx ! OBC indices |
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178 | TYPE(OBC_DATA), INTENT(inout) :: dta ! OBC external data |
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179 | TYPE(TIDES_DATA),INTENT( inout ) :: td ! tidal harmonics data |
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180 | INTEGER,INTENT(in),OPTIONAL :: jit ! Barotropic timestep counter (for timesplitting option) |
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181 | INTEGER,INTENT( in ), OPTIONAL :: time_offset ! time offset in units of timesteps. NB. if jit |
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182 | ! is present then units = subcycle timesteps. |
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183 | ! time_offset = 0 => get data at "now" time level |
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184 | ! time_offset = -1 => get data at "before" time level |
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185 | ! time_offset = +1 => get data at "after" time level |
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186 | ! etc. |
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187 | !! |
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188 | INTEGER :: itide, igrd, ib ! dummy loop indices |
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189 | INTEGER :: time_add ! time offset in units of timesteps |
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190 | REAL(wp) :: z_arg, z_sarg, zflag |
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191 | REAL(wp), DIMENSION(jpmax_harmo) :: z_sist, z_cost |
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192 | !!---------------------------------------------------------------------- |
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193 | |
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194 | IF( nn_timing == 1 ) CALL timing_start('tide_update') |
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195 | |
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196 | zflag=1 |
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197 | IF ( PRESENT(jit) ) THEN |
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198 | IF ( jit /= 1 ) zflag=0 |
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199 | ENDIF |
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200 | |
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201 | IF ( nsec_day == NINT(0.5 * rdttra(1)) .AND. zflag==1 ) THEN |
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202 | ! |
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203 | kt_tide = kt |
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204 | ! |
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205 | IF(lwp) THEN |
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206 | WRITE(numout,*) |
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207 | WRITE(numout,*) 'bdy_tide : (re)Initialization of the tidal bdy forcing at kt=',kt |
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208 | WRITE(numout,*) '~~~~~~~ ' |
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209 | ENDIF |
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210 | ! |
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211 | CALL tide_init_elevation ( idx, td ) |
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212 | CALL tide_init_velocities( idx, td ) |
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213 | ! |
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214 | ENDIF |
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215 | |
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216 | time_add = 0 |
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217 | IF( PRESENT(time_offset) ) THEN |
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218 | time_add = time_offset |
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219 | ENDIF |
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220 | |
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221 | IF( PRESENT(jit) ) THEN |
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222 | z_arg = ( ((kt-kt_tide)-1) * rdt + (jit+time_add) * rdt / REAL(nn_baro,wp) ) |
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223 | ELSE |
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224 | z_arg = ((kt-kt_tide)+time_add) * rdt |
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225 | ENDIF |
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226 | |
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227 | DO itide = 1, nb_harmo |
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228 | z_sarg = z_arg * omega_tide(itide) |
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229 | z_cost(itide) = COS( z_sarg ) |
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230 | z_sist(itide) = SIN( z_sarg ) |
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231 | END DO |
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232 | |
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233 | DO itide = 1, nb_harmo |
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234 | igrd=1 ! SSH on tracer grid |
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235 | DO ib = 1, idx%nblenrim(igrd) |
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236 | dta%ssh(ib) = dta%ssh(ib) + td%ssh(ib,itide,1)*z_cost(itide) + td%ssh(ib,itide,2)*z_sist(itide) |
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237 | END DO |
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238 | igrd=2 ! U grid |
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239 | DO ib=1, idx%nblenrim(igrd) |
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240 | dta%u2d(ib) = dta%u2d(ib) + td%u (ib,itide,1)*z_cost(itide) + td%u (ib,itide,2)*z_sist(itide) |
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241 | END DO |
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242 | igrd=3 ! V grid |
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243 | DO ib=1, idx%nblenrim(igrd) |
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244 | dta%v2d(ib) = dta%v2d(ib) + td%v (ib,itide,1)*z_cost(itide) + td%v (ib,itide,2)*z_sist(itide) |
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245 | END DO |
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246 | END DO |
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247 | ! |
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248 | IF( nn_timing == 1 ) CALL timing_stop('tide_update') |
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249 | ! |
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250 | END SUBROUTINE tide_update |
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251 | |
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252 | SUBROUTINE tide_init_elevation( idx, td ) |
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253 | !!---------------------------------------------------------------------- |
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254 | !! *** ROUTINE tide_init_elevation *** |
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255 | !!---------------------------------------------------------------------- |
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256 | TYPE(OBC_INDEX), INTENT( in ) :: idx ! OBC indices |
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257 | TYPE(TIDES_DATA),INTENT( inout ) :: td ! tidal harmonics data |
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258 | !! * Local declarations |
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259 | REAL(wp),ALLOCATABLE, DIMENSION(:) :: mod_tide, phi_tide |
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260 | INTEGER :: itide, igrd, ib ! dummy loop indices |
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261 | |
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262 | igrd=1 ! SSH on tracer grid. |
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263 | |
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264 | ALLOCATE(mod_tide(idx%nblenrim(igrd)),phi_tide(idx%nblenrim(igrd))) |
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265 | |
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266 | DO itide = 1, nb_harmo |
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267 | DO ib = 1, idx%nblenrim(igrd) |
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268 | mod_tide(ib)=SQRT(td%ssh0(ib,itide,1)**2.+td%ssh0(ib,itide,2)**2.) |
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269 | phi_tide(ib)=ATAN2(-td%ssh0(ib,itide,2),td%ssh0(ib,itide,1)) |
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270 | END DO |
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271 | DO ib = 1, idx%nblenrim(igrd) |
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272 | mod_tide(ib)=mod_tide(ib)*ftide(itide) |
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273 | phi_tide(ib)=phi_tide(ib)+v0tide(itide)+utide(itide) |
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274 | ENDDO |
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275 | DO ib = 1, idx%nblenrim(igrd) |
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276 | td%ssh(ib,itide,1)= mod_tide(ib)*COS(phi_tide(ib)) |
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277 | td%ssh(ib,itide,2)=-mod_tide(ib)*SIN(phi_tide(ib)) |
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278 | ENDDO |
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279 | END DO |
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280 | |
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281 | DEALLOCATE(mod_tide,phi_tide) |
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282 | |
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283 | END SUBROUTINE tide_init_elevation |
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284 | |
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285 | SUBROUTINE tide_init_velocities( idx, td ) |
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286 | !!---------------------------------------------------------------------- |
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287 | !! *** ROUTINE tide_init_elevation *** |
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288 | !!---------------------------------------------------------------------- |
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289 | TYPE(OBC_INDEX), INTENT( in ) :: idx ! OBC indices |
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290 | TYPE(TIDES_DATA),INTENT( inout ) :: td ! tidal harmonics data |
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291 | !! * Local declarations |
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292 | REAL(wp),ALLOCATABLE, DIMENSION(:) :: mod_tide, phi_tide |
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293 | INTEGER :: itide, igrd, ib ! dummy loop indices |
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294 | |
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295 | igrd=2 ! U grid. |
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296 | |
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297 | ALLOCATE(mod_tide(idx%nblenrim(igrd)),phi_tide(idx%nblenrim(igrd))) |
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298 | |
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299 | DO itide = 1, nb_harmo |
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300 | DO ib = 1, idx%nblenrim(igrd) |
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301 | mod_tide(ib)=SQRT(td%u0(ib,itide,1)**2.+td%u0(ib,itide,2)**2.) |
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302 | phi_tide(ib)=ATAN2(-td%u0(ib,itide,2),td%u0(ib,itide,1)) |
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303 | END DO |
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304 | DO ib = 1, idx%nblenrim(igrd) |
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305 | mod_tide(ib)=mod_tide(ib)*ftide(itide) |
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306 | phi_tide(ib)=phi_tide(ib)+v0tide(itide)+utide(itide) |
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307 | ENDDO |
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308 | DO ib = 1, idx%nblenrim(igrd) |
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309 | td%u(ib,itide,1)= mod_tide(ib)*COS(phi_tide(ib)) |
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310 | td%u(ib,itide,2)=-mod_tide(ib)*SIN(phi_tide(ib)) |
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311 | ENDDO |
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312 | END DO |
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313 | |
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314 | DEALLOCATE(mod_tide,phi_tide) |
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315 | |
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316 | igrd=3 ! U grid. |
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317 | |
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318 | ALLOCATE(mod_tide(idx%nblenrim(igrd)),phi_tide(idx%nblenrim(igrd))) |
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319 | |
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320 | DO itide = 1, nb_harmo |
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321 | DO ib = 1, idx%nblenrim(igrd) |
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322 | mod_tide(ib)=SQRT(td%v0(ib,itide,1)**2.+td%v0(ib,itide,2)**2.) |
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323 | phi_tide(ib)=ATAN2(-td%v0(ib,itide,2),td%v0(ib,itide,1)) |
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324 | END DO |
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325 | DO ib = 1, idx%nblenrim(igrd) |
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326 | mod_tide(ib)=mod_tide(ib)*ftide(itide) |
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327 | phi_tide(ib)=phi_tide(ib)+v0tide(itide)+utide(itide) |
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328 | ENDDO |
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329 | DO ib = 1, idx%nblenrim(igrd) |
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330 | td%v(ib,itide,1)= mod_tide(ib)*COS(phi_tide(ib)) |
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331 | td%v(ib,itide,2)=-mod_tide(ib)*SIN(phi_tide(ib)) |
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332 | ENDDO |
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333 | END DO |
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334 | |
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335 | DEALLOCATE(mod_tide,phi_tide) |
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336 | |
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337 | END SUBROUTINE tide_init_velocities |
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338 | #else |
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339 | !!---------------------------------------------------------------------- |
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340 | !! Dummy module NO Unstruct Open Boundary Conditions for tides |
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341 | !!---------------------------------------------------------------------- |
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342 | CONTAINS |
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343 | SUBROUTINE bdytide_init ! Empty routine |
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344 | END SUBROUTINE bdytide_init |
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345 | SUBROUTINE tide_data ! Empty routine |
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346 | END SUBROUTINE tide_data |
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347 | SUBROUTINE tide_update( kt, jit ) ! Empty routine |
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348 | WRITE(*,*) 'tide_update: You should not have seen this print! error?', kt, jit |
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349 | END SUBROUTINE tide_update |
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350 | #endif |
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351 | |
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352 | !!====================================================================== |
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353 | END MODULE bdytides |
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