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 | !! - ! 2016-12 (G. Madec, E. Clementi) update Stoke drift computation |
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10 | !! + add sbc_wave_ini routine |
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11 | !!---------------------------------------------------------------------- |
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12 | |
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13 | !!---------------------------------------------------------------------- |
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14 | !! sbc_stokes : calculate 3D Stokes-drift velocities |
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15 | !! sbc_wave : wave data from wave model in netcdf files |
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16 | !! sbc_wave_init : initialisation fo surface waves |
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17 | !!---------------------------------------------------------------------- |
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18 | USE phycst ! physical constants |
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19 | USE oce ! ocean variables |
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20 | USE sbc_oce ! Surface boundary condition: ocean fields |
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21 | USE zdf_oce, ONLY : ln_zdfqiao |
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22 | USE bdy_oce ! open boundary condition variables |
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23 | USE domvvl ! domain: variable volume layers |
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24 | ! |
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25 | USE iom ! I/O manager library |
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26 | USE in_out_manager ! I/O manager |
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27 | USE lib_mpp ! distribued memory computing library |
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28 | USE fldread ! read input fields |
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29 | USE wrk_nemo ! |
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30 | |
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31 | IMPLICIT NONE |
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32 | PRIVATE |
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33 | |
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34 | PUBLIC sbc_stokes ! routine called in sbccpl |
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35 | PUBLIC sbc_wave ! routine called in sbcmod |
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36 | PUBLIC sbc_wave_init ! routine called in sbcmod |
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37 | |
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38 | ! Variables checking if the wave parameters are coupled (if not, they are read from file) |
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39 | LOGICAL, PUBLIC :: cpl_hsig = .FALSE. |
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40 | LOGICAL, PUBLIC :: cpl_phioc = .FALSE. |
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41 | LOGICAL, PUBLIC :: cpl_sdrftx = .FALSE. |
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42 | LOGICAL, PUBLIC :: cpl_sdrfty = .FALSE. |
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43 | LOGICAL, PUBLIC :: cpl_wper = .FALSE. |
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44 | LOGICAL, PUBLIC :: cpl_wnum = .FALSE. |
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45 | LOGICAL, PUBLIC :: cpl_wstrf = .FALSE. |
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46 | LOGICAL, PUBLIC :: cpl_wdrag = .FALSE. |
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47 | |
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48 | INTEGER :: jpfld ! number of files to read for stokes drift |
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49 | INTEGER :: jp_usd ! index of stokes drift (i-component) (m/s) at T-point |
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50 | INTEGER :: jp_vsd ! index of stokes drift (j-component) (m/s) at T-point |
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51 | INTEGER :: jp_hsw ! index of significant wave hight (m) at T-point |
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52 | INTEGER :: jp_wmp ! index of mean wave period (s) at T-point |
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53 | |
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54 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_cd ! structure of input fields (file informations, fields read) Drag Coefficient |
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55 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_sd ! structure of input fields (file informations, fields read) Stokes Drift |
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56 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_wn ! structure of input fields (file informations, fields read) wave number for Qiao |
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57 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_tauoc ! structure of input fields (file informations, fields read) normalized wave stress into the ocean |
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58 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: cdn_wave !: |
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59 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: hsw, wmp, wnum !: |
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60 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tauoc_wave !: |
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61 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tsd2d !: |
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62 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: div_sd !: barotropic stokes drift divergence |
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63 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: ut0sd, vt0sd !: surface Stokes drift velocities at t-point |
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64 | REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:,:) :: usd , vsd , wsd !: Stokes drift velocities at u-, v- & w-points, resp. |
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65 | |
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66 | !! * Substitutions |
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67 | # include "vectopt_loop_substitute.h90" |
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68 | !!---------------------------------------------------------------------- |
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69 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
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70 | !! $Id$ |
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71 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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72 | !!---------------------------------------------------------------------- |
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73 | CONTAINS |
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74 | |
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75 | SUBROUTINE sbc_stokes( ) |
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76 | !!--------------------------------------------------------------------- |
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77 | !! *** ROUTINE sbc_stokes *** |
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78 | !! |
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79 | !! ** Purpose : compute the 3d Stokes Drift according to Breivik et al., |
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80 | !! 2014 (DOI: 10.1175/JPO-D-14-0020.1) |
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81 | !! |
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82 | !! ** Method : - Calculate Stokes transport speed |
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83 | !! - Calculate horizontal divergence |
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84 | !! - Integrate the horizontal divergenze from the bottom |
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85 | !! ** action |
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86 | !!--------------------------------------------------------------------- |
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87 | INTEGER :: jj, ji, jk ! dummy loop argument |
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88 | INTEGER :: ik ! local integer |
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89 | REAL(wp) :: ztransp, zfac, ztemp, zsp0 |
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90 | REAL(wp) :: zdep_u, zdep_v, zkh_u, zkh_v, zda_u, zda_v |
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91 | REAL(wp), DIMENSION(:,:) , POINTER :: zk_t, zk_u, zk_v, zu0_sd, zv0_sd ! 2D workspace |
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92 | REAL(wp), DIMENSION(:,:,:), POINTER :: ze3divh ! 3D workspace |
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93 | !!--------------------------------------------------------------------- |
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94 | ! |
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95 | CALL wrk_alloc( jpi,jpj,jpk, ze3divh ) |
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96 | CALL wrk_alloc( jpi,jpj, zk_t, zk_u, zk_v, zu0_sd, zv0_sd ) |
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97 | ! |
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98 | ! |
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99 | zfac = 2.0_wp * rpi / 16.0_wp |
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100 | DO jj = 1, jpj ! exp. wave number at t-point (Eq. (19) in Breivick et al. (2014) ) |
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101 | DO ji = 1, jpi |
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102 | ! Stokes drift velocity estimated from Hs and Tmean |
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103 | ztransp = zfac * hsw(ji,jj)*hsw(ji,jj) / MAX( wmp(ji,jj) , 0.0000001_wp ) |
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104 | ! Stokes surface speed |
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105 | zsp0 = SQRT( ut0sd(ji,jj)*ut0sd(ji,jj) + vt0sd(ji,jj)*vt0sd(ji,jj) ) |
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106 | tsd2d(ji,jj) = zsp0 |
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107 | ! Wavenumber scale |
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108 | zk_t(ji,jj) = ABS( zsp0 ) / MAX( ABS( 5.97_wp*ztransp ) , 0.0000001_wp ) |
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109 | END DO |
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110 | END DO |
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111 | DO jj = 1, jpjm1 ! exp. wave number & Stokes drift velocity at u- & v-points |
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112 | DO ji = 1, jpim1 |
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113 | zk_u(ji,jj) = 0.5_wp * ( zk_t(ji,jj) + zk_t(ji+1,jj) ) |
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114 | zk_v(ji,jj) = 0.5_wp * ( zk_t(ji,jj) + zk_t(ji,jj+1) ) |
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115 | ! |
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116 | zu0_sd(ji,jj) = 0.5_wp * ( ut0sd(ji,jj) + ut0sd(ji+1,jj) ) |
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117 | zv0_sd(ji,jj) = 0.5_wp * ( vt0sd(ji,jj) + vt0sd(ji,jj+1) ) |
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118 | END DO |
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119 | END DO |
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120 | ! |
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121 | ! !== horizontal Stokes Drift 3D velocity ==! |
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122 | DO jk = 1, jpkm1 |
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123 | DO jj = 2, jpjm1 |
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124 | DO ji = 2, jpim1 |
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125 | zdep_u = 0.5_wp * ( gdept_n(ji,jj,jk) + gdept_n(ji+1,jj,jk) ) |
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126 | zdep_v = 0.5_wp * ( gdept_n(ji,jj,jk) + gdept_n(ji,jj+1,jk) ) |
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127 | ! |
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128 | zkh_u = zk_u(ji,jj) * zdep_u ! k * depth |
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129 | zkh_v = zk_v(ji,jj) * zdep_v |
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130 | ! ! Depth attenuation |
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131 | zda_u = EXP( -2.0_wp*zkh_u ) / ( 1.0_wp + 8.0_wp*zkh_u ) |
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132 | zda_v = EXP( -2.0_wp*zkh_v ) / ( 1.0_wp + 8.0_wp*zkh_v ) |
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133 | ! |
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134 | usd(ji,jj,jk) = zda_u * zu0_sd(ji,jj) * umask(ji,jj,jk) |
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135 | vsd(ji,jj,jk) = zda_v * zv0_sd(ji,jj) * vmask(ji,jj,jk) |
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136 | END DO |
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137 | END DO |
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138 | END DO |
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139 | CALL lbc_lnk( usd(:,:,:), 'U', vsd(:,:,:), 'V', -1. ) |
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140 | ! |
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141 | ! !== vertical Stokes Drift 3D velocity ==! |
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142 | ! |
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143 | DO jk = 1, jpkm1 ! Horizontal e3*divergence |
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144 | DO jj = 2, jpj |
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145 | DO ji = fs_2, jpi |
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146 | ze3divh(ji,jj,jk) = ( e2u(ji ,jj) * e3u_n(ji ,jj,jk) * usd(ji ,jj,jk) & |
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147 | & - e2u(ji-1,jj) * e3u_n(ji-1,jj,jk) * usd(ji-1,jj,jk) & |
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148 | & + e1v(ji,jj ) * e3v_n(ji,jj ,jk) * vsd(ji,jj ,jk) & |
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149 | & - e1v(ji,jj-1) * e3v_n(ji,jj-1,jk) * vsd(ji,jj-1,jk) ) * r1_e1e2t(ji,jj) |
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150 | END DO |
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151 | END DO |
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152 | END DO |
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153 | ! |
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154 | IF( .NOT. AGRIF_Root() ) THEN |
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155 | IF( nbondi == 1 .OR. nbondi == 2 ) ze3divh(nlci-1, : ,:) = 0._wp ! east |
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156 | IF( nbondi == -1 .OR. nbondi == 2 ) ze3divh( 2 , : ,:) = 0._wp ! west |
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157 | IF( nbondj == 1 .OR. nbondj == 2 ) ze3divh( : ,nlcj-1,:) = 0._wp ! north |
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158 | IF( nbondj == -1 .OR. nbondj == 2 ) ze3divh( : , 2 ,:) = 0._wp ! south |
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159 | ENDIF |
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160 | ! |
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161 | CALL lbc_lnk( ze3divh, 'T', 1. ) |
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162 | ! |
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163 | IF( ln_linssh ) THEN ; ik = 1 ! none zero velocity through the sea surface |
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164 | ELSE ; ik = 2 ! w=0 at the surface (set one for all in sbc_wave_init) |
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165 | ENDIF |
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166 | DO jk = jpkm1, ik, -1 ! integrate from the bottom the hor. divergence (NB: at k=jpk w is always zero) |
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167 | wsd(:,:,jk) = wsd(:,:,jk+1) - ze3divh(:,:,jk) |
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168 | END DO |
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169 | ! |
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170 | IF( ln_bdy ) THEN |
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171 | DO jk = 1, jpkm1 |
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172 | wsd(:,:,jk) = wsd(:,:,jk) * bdytmask(:,:) |
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173 | END DO |
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174 | ENDIF |
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175 | ! !== Horizontal divergence of barotropic Stokes transport ==! |
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176 | div_sd(:,:) = 0._wp |
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177 | DO jk = 1, jpkm1 ! |
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178 | div_sd(:,:) = div_sd(:,:) + ze3divh(:,:,jk) |
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179 | END DO |
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180 | ! |
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181 | CALL iom_put( "ustokes", usd ) |
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182 | CALL iom_put( "vstokes", vsd ) |
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183 | CALL iom_put( "wstokes", wsd ) |
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184 | ! |
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185 | CALL wrk_dealloc( jpi,jpj,jpk, ze3divh ) |
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186 | CALL wrk_dealloc( jpi,jpj, zk_t, zk_u, zk_v, zu0_sd, zv0_sd ) |
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187 | ! |
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188 | END SUBROUTINE sbc_stokes |
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189 | |
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190 | |
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191 | SUBROUTINE sbc_wave( kt ) |
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192 | !!--------------------------------------------------------------------- |
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193 | !! *** ROUTINE sbc_wave *** |
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194 | !! |
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195 | !! ** Purpose : read wave parameters from wave model in netcdf files. |
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196 | !! |
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197 | !! ** Method : - Read namelist namsbc_wave |
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198 | !! - Read Cd_n10 fields in netcdf files |
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199 | !! - Read stokes drift 2d in netcdf files |
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200 | !! - Read wave number in netcdf files |
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201 | !! - Compute 3d stokes drift using Breivik et al.,2014 |
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202 | !! formulation |
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203 | !! ** action |
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204 | !!--------------------------------------------------------------------- |
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205 | INTEGER, INTENT(in ) :: kt ! ocean time step |
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206 | !!--------------------------------------------------------------------- |
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207 | ! |
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208 | IF( ln_cdgw .AND. .NOT. cpl_wdrag ) THEN !== Neutral drag coefficient ==! |
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209 | CALL fld_read( kt, nn_fsbc, sf_cd ) ! read from external forcing |
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210 | cdn_wave(:,:) = sf_cd(1)%fnow(:,:,1) |
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211 | ENDIF |
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212 | |
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213 | IF( ln_tauoc .AND. .NOT. cpl_wstrf ) THEN !== Wave induced stress ==! |
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214 | CALL fld_read( kt, nn_fsbc, sf_tauoc ) ! read wave norm stress from external forcing |
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215 | tauoc_wave(:,:) = sf_tauoc(1)%fnow(:,:,1) |
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216 | ENDIF |
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217 | |
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218 | IF( ln_sdw ) THEN !== Computation of the 3d Stokes Drift ==! |
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219 | ! |
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220 | IF( jpfld > 0 ) THEN ! Read from file only if the field is not coupled |
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221 | CALL fld_read( kt, nn_fsbc, sf_sd ) ! read wave parameters from external forcing |
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222 | IF( jp_hsw > 0 ) hsw (:,:) = sf_sd(jp_hsw)%fnow(:,:,1) ! significant wave height |
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223 | IF( jp_wmp > 0 ) wmp (:,:) = sf_sd(jp_wmp)%fnow(:,:,1) ! wave mean period |
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224 | IF( jp_usd > 0 ) ut0sd(:,:) = sf_sd(jp_usd)%fnow(:,:,1) ! 2D zonal Stokes Drift at T point |
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225 | IF( jp_vsd > 0 ) vt0sd(:,:) = sf_sd(jp_vsd)%fnow(:,:,1) ! 2D meridional Stokes Drift at T point |
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226 | ENDIF |
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227 | ! |
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228 | ! Read also wave number if needed, so that it is available in coupling routines |
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229 | IF( ln_zdfqiao .AND. .NOT.cpl_wnum ) THEN |
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230 | CALL fld_read( kt, nn_fsbc, sf_wn ) ! read wave parameters from external forcing |
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231 | wnum(:,:) = sf_wn(1)%fnow(:,:,1) |
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232 | ENDIF |
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233 | |
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234 | ! !== Computation of the 3d Stokes Drift ==! |
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235 | ! |
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236 | IF( jpfld == 4 ) CALL sbc_stokes() ! Calculate only if required fields are read |
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237 | ! ! In coupled wave model-NEMO case the call is done after coupling |
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238 | ! |
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239 | ENDIF |
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240 | ! |
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241 | END SUBROUTINE sbc_wave |
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242 | |
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243 | |
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244 | SUBROUTINE sbc_wave_init |
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245 | !!--------------------------------------------------------------------- |
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246 | !! *** ROUTINE sbc_wave_init *** |
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247 | !! |
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248 | !! ** Purpose : read wave parameters from wave model in netcdf files. |
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249 | !! |
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250 | !! ** Method : - Read namelist namsbc_wave |
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251 | !! - Read Cd_n10 fields in netcdf files |
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252 | !! - Read stokes drift 2d in netcdf files |
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253 | !! - Read wave number in netcdf files |
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254 | !! - Compute 3d stokes drift using Breivik et al.,2014 |
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255 | !! formulation |
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256 | !! ** action |
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257 | !!--------------------------------------------------------------------- |
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258 | INTEGER :: ierror, ios ! local integer |
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259 | INTEGER :: ifpr |
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260 | !! |
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261 | CHARACTER(len=100) :: cn_dir ! Root directory for location of drag coefficient files |
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262 | TYPE(FLD_N), ALLOCATABLE, DIMENSION(:) :: slf_i ! array of namelist informations on the fields to read |
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263 | TYPE(FLD_N) :: sn_cdg, sn_usd, sn_vsd, & |
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264 | & sn_hsw, sn_wmp, sn_wnum, sn_tauoc ! informations about the fields to be read |
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265 | ! |
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266 | NAMELIST/namsbc_wave/ sn_cdg, cn_dir, sn_usd, sn_vsd, sn_hsw, sn_wmp, sn_wnum, sn_tauoc |
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267 | !!--------------------------------------------------------------------- |
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268 | ! |
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269 | REWIND( numnam_ref ) ! Namelist namsbc_wave in reference namelist : File for drag coeff. from wave model |
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270 | READ ( numnam_ref, namsbc_wave, IOSTAT = ios, ERR = 901) |
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271 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_wave in reference namelist', lwp ) |
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272 | |
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273 | REWIND( numnam_cfg ) ! Namelist namsbc_wave in configuration namelist : File for drag coeff. from wave model |
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274 | READ ( numnam_cfg, namsbc_wave, IOSTAT = ios, ERR = 902 ) |
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275 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_wave in configuration namelist', lwp ) |
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276 | IF(lwm) WRITE ( numond, namsbc_wave ) |
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277 | ! |
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278 | IF( ln_cdgw ) THEN |
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279 | IF( .NOT. cpl_wdrag ) THEN |
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280 | ALLOCATE( sf_cd(1), STAT=ierror ) !* allocate and fill sf_wave with sn_cdg |
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281 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable to allocate sf_wave structure' ) |
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282 | ! |
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283 | ALLOCATE( sf_cd(1)%fnow(jpi,jpj,1) ) |
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284 | IF( sn_cdg%ln_tint ) ALLOCATE( sf_cd(1)%fdta(jpi,jpj,1,2) ) |
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285 | CALL fld_fill( sf_cd, (/ sn_cdg /), cn_dir, 'sbc_wave_init', 'Wave module ', 'namsbc_wave' ) |
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286 | ENDIF |
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287 | ALLOCATE( cdn_wave(jpi,jpj) ) |
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288 | ENDIF |
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289 | |
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290 | IF( ln_tauoc ) THEN |
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291 | IF( .NOT. cpl_wstrf ) THEN |
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292 | ALLOCATE( sf_tauoc(1), STAT=ierror ) !* allocate and fill sf_wave with sn_tauoc |
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293 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable to allocate sf_wave structure' ) |
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294 | ! |
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295 | ALLOCATE( sf_tauoc(1)%fnow(jpi,jpj,1) ) |
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296 | IF( sn_tauoc%ln_tint ) ALLOCATE( sf_tauoc(1)%fdta(jpi,jpj,1,2) ) |
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297 | CALL fld_fill( sf_tauoc, (/ sn_tauoc /), cn_dir, 'sbc_wave_init', 'Wave module', 'namsbc_wave' ) |
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298 | ENDIF |
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299 | ALLOCATE( tauoc_wave(jpi,jpj) ) |
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300 | ENDIF |
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301 | |
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302 | IF( ln_sdw ) THEN ! Find out how many fields have to be read from file if not coupled |
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303 | jpfld=0 |
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304 | jp_usd=0 ; jp_vsd=0 ; jp_hsw=0 ; jp_wmp=0 |
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305 | IF( .NOT. cpl_sdrftx ) THEN |
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306 | jpfld = jpfld + 1 |
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307 | jp_usd = jpfld |
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308 | ENDIF |
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309 | IF( .NOT. cpl_sdrfty ) THEN |
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310 | jpfld = jpfld + 1 |
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311 | jp_vsd = jpfld |
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312 | ENDIF |
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313 | IF( .NOT. cpl_hsig ) THEN |
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314 | jpfld = jpfld + 1 |
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315 | jp_hsw = jpfld |
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316 | ENDIF |
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317 | IF( .NOT. cpl_wper ) THEN |
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318 | jpfld = jpfld + 1 |
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319 | jp_wmp = jpfld |
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320 | ENDIF |
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321 | |
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322 | ! Read from file only the non-coupled fields |
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323 | IF( jpfld > 0 ) THEN |
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324 | ALLOCATE( slf_i(jpfld) ) |
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325 | IF( jp_usd > 0 ) slf_i(jp_usd) = sn_usd |
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326 | IF( jp_vsd > 0 ) slf_i(jp_vsd) = sn_vsd |
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327 | IF( jp_hsw > 0 ) slf_i(jp_hsw) = sn_hsw |
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328 | IF( jp_wmp > 0 ) slf_i(jp_wmp) = sn_wmp |
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329 | ALLOCATE( sf_sd(jpfld), STAT=ierror ) !* allocate and fill sf_sd with stokes drift |
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330 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable to allocate sf_wave structure' ) |
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331 | ! |
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332 | DO ifpr= 1, jpfld |
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333 | ALLOCATE( sf_sd(ifpr)%fnow(jpi,jpj,1) ) |
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334 | IF( slf_i(ifpr)%ln_tint ) ALLOCATE( sf_sd(ifpr)%fdta(jpi,jpj,1,2) ) |
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335 | END DO |
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336 | ! |
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337 | CALL fld_fill( sf_sd, slf_i, cn_dir, 'sbc_wave_init', 'Wave module ', 'namsbc_wave' ) |
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338 | ENDIF |
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339 | ALLOCATE( usd (jpi,jpj,jpk), vsd (jpi,jpj,jpk), wsd(jpi,jpj,jpk) ) |
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340 | ALLOCATE( hsw (jpi,jpj) , wmp (jpi,jpj) ) |
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341 | ALLOCATE( ut0sd(jpi,jpj) , vt0sd(jpi,jpj) ) |
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342 | ALLOCATE( div_sd(jpi,jpj) ) |
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343 | ALLOCATE( tsd2d (jpi,jpj) ) |
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344 | usd(:,:,:) = 0._wp |
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345 | vsd(:,:,:) = 0._wp |
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346 | wsd(:,:,:) = 0._wp |
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347 | ! Wave number needed only if ln_zdfqiao=T |
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348 | IF( .NOT. cpl_wnum ) THEN |
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349 | ALLOCATE( sf_wn(1), STAT=ierror ) !* allocate and fill sf_wave with sn_wnum |
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350 | IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable toallocate sf_wave structure' ) |
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351 | ALLOCATE( sf_wn(1)%fnow(jpi,jpj,1) ) |
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352 | IF( sn_wnum%ln_tint ) ALLOCATE( sf_wn(1)%fdta(jpi,jpj,1,2) ) |
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353 | CALL fld_fill( sf_wn, (/ sn_wnum /), cn_dir, 'sbc_wave', 'Wave module', 'namsbc_wave' ) |
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354 | ENDIF |
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355 | ALLOCATE( wnum(jpi,jpj) ) |
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356 | ENDIF |
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357 | ! |
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358 | END SUBROUTINE sbc_wave_init |
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359 | |
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360 | !!====================================================================== |
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361 | END MODULE sbcwave |
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