1 | MODULE sbcwave |
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2 | !!====================================================================== |
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3 | !! *** MODULE sbcwave *** |
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4 | !! Wave module |
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5 | !!====================================================================== |
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6 | !! History : 3.3 ! 2011-09 (M. Adani) Original code: Drag Coefficient |
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7 | !! : 3.4 ! 2012-10 (M. Adani) Stokes Drift |
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8 | !! 3.6 ! 2014-09 (E. Clementi,P. Oddo) New Stokes Drift Computation |
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9 | !!---------------------------------------------------------------------- |
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10 | |
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11 | !!---------------------------------------------------------------------- |
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12 | !! sbc_wave : wave data from wave model in netcdf files |
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13 | !!---------------------------------------------------------------------- |
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14 | USE oce ! |
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15 | USE sbc_oce ! Surface boundary condition: ocean fields |
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16 | USE bdy_oce ! |
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17 | USE domvvl ! |
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18 | USE iom ! I/O manager library |
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19 | USE in_out_manager ! I/O manager |
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20 | USE lib_mpp ! distribued memory computing library |
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21 | USE fldread ! read input fields |
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22 | USE wrk_nemo ! |
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23 | USE phycst ! physical constants |
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24 | |
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25 | IMPLICIT NONE |
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26 | PRIVATE |
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27 | |
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28 | PUBLIC sbc_wave ! routine called in sbcmod |
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29 | |
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30 | INTEGER, PARAMETER :: jpfld = 4 ! number of files to read for stokes drift |
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31 | INTEGER, PARAMETER :: jp_usd = 1 ! index of stokes drift (i-component) (m/s) at T-point |
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32 | INTEGER, PARAMETER :: jp_vsd = 2 ! index of stokes drift (j-component) (m/s) at T-point |
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33 | INTEGER, PARAMETER :: jp_swh = 3 ! index of significant wave hight (m) at T-point |
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34 | INTEGER, PARAMETER :: jp_wmp = 4 ! index of mean wave period (s) at T-point |
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35 | |
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36 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_cd ! structure of input fields (file informations, fields read) Drag Coefficient |
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37 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_sd ! structure of input fields (file informations, fields read) Stokes Drift |
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38 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_wn ! structure of input fields (file informations, fields read) wave number for Qiao |
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39 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_tauoc ! structure of input fields (file informations, fields read) normalized wave stress into the ocean |
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40 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: cdn_wave |
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41 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: swh,wmp, wnum |
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42 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tauoc_wave |
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43 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tsd2d |
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44 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:,:) :: usd3d, vsd3d, wsd3d |
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45 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:,:) :: usd3dt , vsd3dt |
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46 | |
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47 | !! * Substitutions |
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48 | # include "domzgr_substitute.h90" |
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49 | # include "vectopt_loop_substitute.h90" |
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50 | !!---------------------------------------------------------------------- |
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51 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
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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 sbc_wave( kt ) |
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58 | !!--------------------------------------------------------------------- |
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59 | !! *** ROUTINE sbc_wave *** |
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60 | !! |
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61 | !! ** Purpose : read wave parameters from wave model in netcdf files. |
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62 | !! |
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63 | !! ** Method : - Read namelist namsbc_wave |
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64 | !! - Read Cd_n10 fields in netcdf files |
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65 | !! - Read stokes drift 2d in netcdf files |
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66 | !! - Read wave number in netcdf files |
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67 | !! - Compute 3d stokes drift using Breivik et al.,2014 |
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68 | !! formulation |
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69 | !! ** action |
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70 | !!--------------------------------------------------------------------- |
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71 | USE zdf_oce, ONLY : ln_zdfqiao |
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72 | |
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73 | INTEGER, INTENT( in ) :: kt ! ocean time step |
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74 | ! |
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75 | INTEGER :: ierror ! return error code |
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76 | INTEGER :: ifpr, jj,ji,jk ! dummy loop indice |
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77 | INTEGER :: ios ! Local integer output status for namelist read |
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78 | CHARACTER(len=100) :: cn_dir ! Root directory for location of drag coefficient files |
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79 | REAL(wp) :: ztransp, zfac, zsp0, zk, zus, zvs |
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80 | REAL(wp), DIMENSION(jpi,jpj) :: zusd2dt, zvsd2dt |
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81 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze3hdiv ! 3D workspace |
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82 | TYPE(FLD_N) :: sn_cdg, sn_usd, sn_vsd ! informations about the fields to be read |
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83 | TYPE(FLD_N) :: sn_swh, sn_wmp, sn_wnum, sn_tauoc ! " " " " " " " |
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84 | TYPE(FLD_N), DIMENSION(jpfld) :: slf_i ! array of namelist informations on the fields to read |
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85 | NAMELIST/namsbc_wave/ sn_cdg, cn_dir, sn_usd, sn_vsd, sn_swh, sn_wmp, sn_wnum, sn_tauoc |
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86 | !!--------------------------------------------------------------------- |
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87 | ! |
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88 | ! ! -------------------- ! |
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89 | IF( kt == nit000 ) THEN ! First call kt=nit000 ! |
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90 | ! ! -------------------- ! |
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91 | REWIND( numnam_ref ) ! Namelist namsbc_wave in reference namelist : File for drag coeff. from wave model |
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92 | READ ( numnam_ref, namsbc_wave, IOSTAT = ios, ERR = 901) |
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93 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_wave in reference namelist', lwp ) |
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94 | |
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95 | REWIND( numnam_cfg ) ! Namelist namsbc_wave in configuration namelist : File for drag coeff. from wave model |
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96 | READ ( numnam_cfg, namsbc_wave, IOSTAT = ios, ERR = 902 ) |
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97 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_wave in configuration namelist', lwp ) |
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98 | IF(lwm) WRITE ( numond, namsbc_wave ) |
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99 | ! |
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100 | IF( ln_cdgw ) THEN |
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101 | ALLOCATE( sf_cd(1), STAT=ierror ) ! allocate and fill sf_wave with sn_cdg |
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102 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave: unable to allocate sf_wave structure' ) |
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103 | ! |
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104 | ALLOCATE( sf_cd(1)%fnow(jpi,jpj,1) ) |
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105 | IF( sn_cdg%ln_tint ) ALLOCATE( sf_cd(1)%fdta(jpi,jpj,1,2) ) |
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106 | CALL fld_fill( sf_cd, (/ sn_cdg /), cn_dir, 'sbc_wave', 'Wave module ', 'namsbc_wave' ) |
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107 | ALLOCATE( cdn_wave(jpi,jpj) ) |
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108 | ENDIF |
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109 | |
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110 | IF( ln_tauoc ) THEN |
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111 | ALLOCATE( sf_tauoc(1), STAT=ierror ) ! allocate and fill sf_wave with sn_tauoc |
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112 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave: unable to allocate sf_wave structure' ) |
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113 | ! |
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114 | ALLOCATE( sf_tauoc(1)%fnow(jpi,jpj,1) ) |
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115 | IF( sn_tauoc%ln_tint ) ALLOCATE( sf_tauoc(1)%fdta(jpi,jpj,1,2) ) |
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116 | CALL fld_fill( sf_tauoc, (/ sn_tauoc /), cn_dir, 'sbc_wave', 'Wave module', 'namsbc_wave' ) |
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117 | ALLOCATE( tauoc_wave(jpi,jpj) ) |
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118 | tauoc_wave(:,:) = 0.0 |
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119 | ENDIF |
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120 | |
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121 | IF( ln_sdw ) THEN |
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122 | slf_i(jp_usd) = sn_usd ; slf_i(jp_vsd) = sn_vsd; |
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123 | slf_i(jp_swh) = sn_swh ; slf_i(jp_wmp) = sn_wmp; |
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124 | ALLOCATE( sf_sd(jpfld), STAT=ierror ) ! allocate and fill sf_sd with stokes drift |
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125 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave: unable to allocate sf_wave structure' ) |
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126 | ! |
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127 | DO ifpr = 1, jpfld |
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128 | ALLOCATE( sf_sd(ifpr)%fnow(jpi,jpj,1) ) |
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129 | IF( slf_i(ifpr)%ln_tint ) ALLOCATE( sf_sd(ifpr)%fdta(jpi,jpj,1,2) ) |
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130 | END DO |
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131 | |
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132 | CALL fld_fill( sf_sd, slf_i, cn_dir, 'sbc_wave', 'Wave module ', 'namsbc_wave' ) |
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133 | ALLOCATE( usd3dt(jpi,jpj,jpk), vsd3dt(jpi,jpj,jpk), wsd3d(jpi,jpj,jpk) ) |
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134 | ALLOCATE( usd3d (jpi,jpj,jpk), vsd3d (jpi,jpj,jpk) ) |
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135 | ALLOCATE( swh(jpi,jpj), wmp(jpi,jpj) ) |
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136 | usd3d(:,:,:) = 0._wp |
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137 | vsd3d(:,:,:) = 0._wp |
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138 | wsd3d(:,:,:) = 0._wp |
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139 | IF( ln_zdfqiao ) THEN !== Vertical mixing enhancement using Qiao,2010 ==! |
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140 | ALLOCATE( sf_wn(1), STAT=ierror ) !* allocate and fill sf_wave with sn_wnum |
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141 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave: unable to allocate sf_wave structure' ) |
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142 | ALLOCATE( sf_wn(1)%fnow(jpi,jpj,1) ) |
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143 | IF( sn_wnum%ln_tint ) ALLOCATE( sf_wn(1)%fdta(jpi,jpj,1,2) ) |
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144 | CALL fld_fill( sf_wn, (/ sn_wnum /), cn_dir, 'sbc_wave', 'Wave module', 'namsbc_wave' ) |
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145 | ALLOCATE( wnum(jpi,jpj),tsd2d(jpi,jpj) ) |
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146 | ENDIF |
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147 | ENDIF |
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148 | ENDIF |
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149 | ! |
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150 | IF( ln_cdgw ) THEN !== Neutral drag coefficient ==! |
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151 | CALL fld_read( kt, nn_fsbc, sf_cd ) ! read from external forcing |
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152 | cdn_wave(:,:) = sf_cd(1)%fnow(:,:,1) |
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153 | ENDIF |
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154 | |
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155 | IF( ln_tauoc ) THEN !== Wave induced stress ==! |
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156 | CALL fld_read( kt, nn_fsbc, sf_tauoc ) ! read wave norm stress from external forcing |
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157 | tauoc_wave(:,:) = sf_tauoc(1)%fnow(:,:,1) |
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158 | ENDIF |
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159 | |
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160 | IF( ln_sdw ) THEN !== Computation of the 3d Stokes Drift ==! |
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161 | CALL fld_read( kt, nn_fsbc, sf_sd ) ! read wave parameters from external forcing |
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162 | swh(:,:) = sf_sd(jp_swh)%fnow(:,:,1) ! significant wave height |
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163 | wmp(:,:) = sf_sd(jp_wmp)%fnow(:,:,1) ! wave mean period |
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164 | zusd2dt(:,:) = sf_sd(jp_usd)%fnow(:,:,1) ! 2D zonal Stokes Drift at T point |
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165 | zvsd2dt(:,:) = sf_sd(jp_vsd)%fnow(:,:,1) ! 2D meridional Stokes Drift at T point |
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166 | ! |
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167 | !== Computation of the 3d Stokes Drift according to Breivik et al.,2014 |
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168 | !(DOI: 10.1175/JPO-D-14-0020.1)==! |
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169 | ! |
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170 | DO jk = 1, jpk |
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171 | DO jj = 1, jpj |
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172 | DO ji = 1, jpi |
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173 | ! On T grid |
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174 | ! Stokes transport speed estimated from Hs and Tmean |
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175 | ztransp = 2.0_wp*rpi*swh(ji,jj)**2.0_wp/(16.0_wp*MAX(wmp(ji,jj),0.0000001_wp)) |
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176 | ! Stokes surface speed |
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177 | zsp0 = SQRT( zusd2dt(ji,jj)**2 + zvsd2dt(ji,jj)**2 ) |
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178 | ! Wavenumber scale |
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179 | zk = ABS(zsp0)/MAX(ABS(5.97_wp*ztransp),0.0000001_wp) |
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180 | ! Depth attenuation |
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181 | zfac = EXP(-2.0_wp*zk*fsdept(ji,jj,jk))/(1.0_wp+8.0_wp*zk*fsdept(ji,jj,jk)) |
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182 | ! |
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183 | usd3dt(ji,jj,jk) = zfac * zusd2dt(ji,jj) * tmask(ji,jj,jk) |
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184 | vsd3dt(ji,jj,jk) = zfac * zvsd2dt(ji,jj) * tmask(ji,jj,jk) |
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185 | END DO |
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186 | END DO |
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187 | END DO |
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188 | ! Into the U and V Grid |
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189 | DO jk = 1, jpkm1 |
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190 | DO jj = 1, jpjm1 |
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191 | DO ji = 1, jpim1 |
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192 | usd3d(ji,jj,jk) = 0.5 * umask(ji,jj,jk) * & |
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193 | & ( usd3dt(ji,jj,jk) + usd3dt(ji+1,jj,jk) ) |
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194 | vsd3d(ji,jj,jk) = 0.5 * vmask(ji,jj,jk) * & |
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195 | & ( vsd3dt(ji,jj,jk) + vsd3dt(ji,jj+1,jk) ) |
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196 | END DO |
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197 | END DO |
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198 | END DO |
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199 | ! |
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200 | CALL lbc_lnk( usd3d(:,:,:), 'U', -1. ) |
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201 | CALL lbc_lnk( vsd3d(:,:,:), 'V', -1. ) |
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202 | ! |
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203 | DO jk = 1, jpkm1 ! Horizontal divergence |
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204 | DO jj = 2, jpj |
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205 | DO ji = fs_2, jpi |
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206 | ze3hdiv(ji,jj,jk) = ( e2u(ji ,jj) * usd3d(ji ,jj,jk) & |
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207 | & - e2u(ji-1,jj) * usd3d(ji-1,jj,jk) & |
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208 | & + e1v(ji,jj ) * vsd3d(ji,jj ,jk) & |
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209 | & - e1v(ji,jj-1) * vsd3d(ji,jj-1,jk) ) * r1_e1e2t(ji,jj) |
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210 | END DO |
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211 | END DO |
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212 | END DO |
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213 | ! |
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214 | IF( .NOT. AGRIF_Root() ) THEN |
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215 | IF( nbondi == 1 .OR. nbondi == 2 ) ze3hdiv(nlci-1, : ,:) = 0._wp ! east |
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216 | IF( nbondi == -1 .OR. nbondi == 2 ) ze3hdiv( 2 , : ,:) = 0._wp ! west |
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217 | IF( nbondj == 1 .OR. nbondj == 2 ) ze3hdiv( : ,nlcj-1,:) = 0._wp ! north |
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218 | IF( nbondj == -1 .OR. nbondj == 2 ) ze3hdiv( : , 2 ,:) = 0._wp ! south |
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219 | ENDIF |
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220 | ! |
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221 | CALL lbc_lnk( ze3hdiv, 'T', 1. ) |
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222 | ! |
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223 | DO jk = jpkm1, 1, -1 ! integrate from the bottom the e3t * hor. divergence |
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224 | wsd3d(:,:,jk) = wsd3d(:,:,jk+1) - fse3t_n(:,:,jk) * ze3hdiv(:,:,jk) |
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225 | END DO |
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226 | #if defined key_bdy |
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227 | IF( lk_bdy ) THEN |
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228 | DO jk = 1, jpkm1 |
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229 | wsd3d(:,:,jk) = wsd3d(:,:,jk) * bdytmask(:,:) |
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230 | END DO |
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231 | ENDIF |
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232 | #endif |
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233 | |
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234 | IF ( ln_zdfqiao ) THEN |
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235 | CALL fld_read( kt, nn_fsbc, sf_wn ) ! read wave parameters from external forcing |
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236 | wnum(:,:) = sf_wn(1)%fnow(:,:,1) |
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237 | |
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238 | ! Calculate the module of the stokes drift on T grid |
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239 | !------------------------------------------------- |
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240 | DO jj = 1, jpj |
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241 | DO ji = 1, jpi |
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242 | tsd2d(ji,jj) = SQRT( zusd2dt(ji,jj)**2 + zvsd2dt(ji,jj)**2 ) |
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243 | END DO |
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244 | END DO |
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245 | ENDIF |
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246 | ! |
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247 | ENDIF |
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248 | ! |
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249 | END SUBROUTINE sbc_wave |
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250 | |
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251 | !!====================================================================== |
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252 | END MODULE sbcwave |
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