1 | MODULE traadv_qck |
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2 | !!============================================================================== |
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3 | !! *** MODULE traadv_qck *** |
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4 | !! Ocean tracers: horizontal & vertical advective trend |
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5 | !!============================================================================== |
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6 | !! History : 3.0 ! 2008-07 (G. Reffray) Original code |
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7 | !! 3.3 ! 2010-05 (C.Ethe, G. Madec) merge TRC-TRA + switch from velocity to transport |
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8 | !!---------------------------------------------------------------------- |
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9 | |
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10 | !!---------------------------------------------------------------------- |
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11 | !! tra_adv_qck : update the tracer trend with the horizontal advection |
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12 | !! trends using a 3rd order finite difference scheme |
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13 | !! tra_adv_qck_i : apply QUICK scheme in i-direction |
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14 | !! tra_adv_qck_j : apply QUICK scheme in j-direction |
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15 | !! tra_adv_cen2_k : 2nd centered scheme for the vertical advection |
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16 | !!---------------------------------------------------------------------- |
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17 | USE oce ! ocean dynamics and active tracers |
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18 | USE dom_oce ! ocean space and time domain |
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19 | USE trc_oce ! share passive tracers/Ocean variables |
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20 | USE trd_oce ! trends: ocean variables |
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21 | USE trdtra ! trends manager: tracers |
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22 | USE diaptr ! poleward transport diagnostics |
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23 | ! |
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24 | USE in_out_manager ! I/O manager |
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25 | USE lib_mpp ! distribued memory computing |
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26 | USE lbclnk ! ocean lateral boundary condition (or mpp link) |
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27 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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28 | |
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29 | IMPLICIT NONE |
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30 | PRIVATE |
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31 | |
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32 | PUBLIC tra_adv_qck ! routine called by step.F90 |
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33 | |
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34 | REAL(wp) :: r1_6 = 1./ 6. ! 1/6 ratio |
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35 | |
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36 | LOGICAL :: l_trd ! flag to compute trends |
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37 | LOGICAL :: l_ptr ! flag to compute poleward transport |
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38 | |
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39 | |
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40 | !! * Substitutions |
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41 | # include "vectopt_loop_substitute.h90" |
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42 | !!---------------------------------------------------------------------- |
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43 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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44 | !! $Id$ |
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45 | !! Software governed by the CeCILL license (see ./LICENSE) |
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46 | !!---------------------------------------------------------------------- |
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47 | CONTAINS |
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48 | |
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49 | SUBROUTINE tra_adv_qck ( kt, kit000, ktlev, cdtype, p2dt, pu, pv, pw, & |
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50 | & pt_lev1, pt_lev2, pt_rhs, kjpt ) |
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51 | !!---------------------------------------------------------------------- |
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52 | !! *** ROUTINE tra_adv_qck *** |
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53 | !! |
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54 | !! ** Purpose : Compute the now trend due to the advection of tracers |
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55 | !! and add it to the general trend of passive tracer equations. |
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56 | !! |
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57 | !! ** Method : The advection is evaluated by a third order scheme |
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58 | !! For a positive velocity u : u(i)>0 |
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59 | !! |--FU--|--FC--|--FD--|------| |
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60 | !! i-1 i i+1 i+2 |
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61 | !! |
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62 | !! For a negative velocity u : u(i)<0 |
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63 | !! |------|--FD--|--FC--|--FU--| |
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64 | !! i-1 i i+1 i+2 |
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65 | !! where FU is the second upwind point |
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66 | !! FD is the first douwning point |
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67 | !! FC is the central point (or the first upwind point) |
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68 | !! |
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69 | !! Flux(i) = u(i) * { 0.5(FC+FD) -0.5C(i)(FD-FC) -((1-C(i))/6)(FU+FD-2FC) } |
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70 | !! with C(i)=|u(i)|dx(i)/dt (=Courant number) |
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71 | !! |
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72 | !! dt = 2*rdtra and the scalar values are tb and sb |
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73 | !! |
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74 | !! On the vertical, the simple centered scheme used pt_lev2 |
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75 | !! |
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76 | !! The fluxes are bounded by the ULTIMATE limiter to |
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77 | !! guarantee the monotonicity of the solution and to |
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78 | !! prevent the appearance of spurious numerical oscillations |
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79 | !! |
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80 | !! ** Action : - update pt_rhs with the now advective tracer trends |
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81 | !! - send trends to trdtra module for further diagnostcs (l_trdtra=T) |
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82 | !! - htr_adv, str_adv : poleward advective heat and salt transport (ln_diaptr=T) |
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83 | !! |
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84 | !! ** Reference : Leonard (1979, 1991) |
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85 | !!---------------------------------------------------------------------- |
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86 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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87 | INTEGER , INTENT(in ) :: kit000 ! first time step index |
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88 | INTEGER , INTENT(in ) :: ktlev ! time level index for source terms |
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89 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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90 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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91 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
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92 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pu, pv, pw ! 3 ocean velocity components |
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93 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: pt_lev1, pt_lev2 ! before and now tracer fields |
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94 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pt_rhs ! tracer trend |
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95 | !!---------------------------------------------------------------------- |
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96 | ! |
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97 | IF( kt == kit000 ) THEN |
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98 | IF(lwp) WRITE(numout,*) |
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99 | IF(lwp) WRITE(numout,*) 'tra_adv_qck : 3rd order quickest advection scheme on ', cdtype |
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100 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~' |
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101 | IF(lwp) WRITE(numout,*) |
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102 | ENDIF |
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103 | ! |
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104 | l_trd = .FALSE. |
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105 | l_ptr = .FALSE. |
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106 | IF( ( cdtype == 'TRA' .AND. l_trdtra ) .OR. ( cdtype == 'TRC' .AND. l_trdtrc ) ) l_trd = .TRUE. |
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107 | IF( cdtype == 'TRA' .AND. ln_diaptr ) l_ptr = .TRUE. |
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108 | ! |
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109 | ! |
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110 | ! ! horizontal fluxes are computed with the QUICKEST + ULTIMATE scheme |
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111 | CALL tra_adv_qck_i( kt, ktlev, cdtype, p2dt, pu, pt_lev1, pt_lev2, pt_rhs, kjpt ) |
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112 | CALL tra_adv_qck_j( kt, ktlev, cdtype, p2dt, pv, pt_lev1, pt_lev2, pt_rhs, kjpt ) |
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113 | |
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114 | ! ! vertical fluxes are computed with the 2nd order centered scheme |
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115 | CALL tra_adv_cen2_k( kt, ktlev, cdtype, pw, pt_lev2, pt_rhs, kjpt ) |
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116 | ! |
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117 | END SUBROUTINE tra_adv_qck |
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118 | |
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119 | |
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120 | SUBROUTINE tra_adv_qck_i( kt, ktlev, cdtype, p2dt, pu, & |
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121 | & pt_lev1, pt_lev2, pt_rhs, kjpt ) |
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122 | !!---------------------------------------------------------------------- |
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123 | !! |
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124 | !!---------------------------------------------------------------------- |
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125 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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126 | INTEGER , INTENT(in ) :: ktlev ! time level index for source terms |
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127 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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128 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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129 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
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130 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pu ! i-velocity components |
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131 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: pt_lev1, pt_lev2 ! before and now tracer fields |
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132 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pt_rhs ! tracer trend |
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133 | !! |
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134 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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135 | REAL(wp) :: ztra, zbtr, zdir, zdx, zmsk ! local scalars |
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136 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zwx, zfu, zfc, zfd |
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137 | !---------------------------------------------------------------------- |
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138 | ! |
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139 | ! ! =========== |
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140 | DO jn = 1, kjpt ! tracer loop |
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141 | ! ! =========== |
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142 | zfu(:,:,:) = 0._wp ; zfc(:,:,:) = 0._wp |
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143 | zfd(:,:,:) = 0._wp ; zwx(:,:,:) = 0._wp |
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144 | ! |
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145 | !!gm why not using a SHIFT instruction... |
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146 | DO jk = 1, jpkm1 !--- Computation of the ustream and downstream value of the tracer and the mask |
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147 | DO jj = 2, jpjm1 |
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148 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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149 | zfc(ji,jj,jk) = pt_lev1(ji-1,jj,jk,jn) ! Upstream in the x-direction for the tracer |
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150 | zfd(ji,jj,jk) = pt_lev1(ji+1,jj,jk,jn) ! Downstream in the x-direction for the tracer |
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151 | END DO |
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152 | END DO |
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153 | END DO |
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154 | CALL lbc_lnk_multi( 'traadv_qck', zfc(:,:,:), 'T', 1. , zfd(:,:,:), 'T', 1. ) ! Lateral boundary conditions |
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155 | |
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156 | ! |
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157 | ! Horizontal advective fluxes |
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158 | ! --------------------------- |
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159 | DO jk = 1, jpkm1 |
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160 | DO jj = 2, jpjm1 |
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161 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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162 | zdir = 0.5 + SIGN( 0.5, pu(ji,jj,jk) ) ! if pu > 0 : zdir = 1 otherwise zdir = 0 |
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163 | zfu(ji,jj,jk) = zdir * zfc(ji,jj,jk ) + ( 1. - zdir ) * zfd(ji+1,jj,jk) ! FU in the x-direction for T |
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164 | END DO |
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165 | END DO |
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166 | END DO |
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167 | ! |
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168 | DO jk = 1, jpkm1 |
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169 | DO jj = 2, jpjm1 |
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170 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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171 | zdir = 0.5 + SIGN( 0.5, pu(ji,jj,jk) ) ! if pu > 0 : zdir = 1 otherwise zdir = 0 |
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172 | zdx = ( zdir * e1t(ji,jj) + ( 1. - zdir ) * e1t(ji+1,jj) ) * e2u(ji,jj) * e3u(ji,jj,jk,ktlev) |
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173 | zwx(ji,jj,jk) = ABS( pu(ji,jj,jk) ) * p2dt / zdx ! (0<zc_cfl<1 : Courant number on x-direction) |
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174 | zfc(ji,jj,jk) = zdir * pt_lev1(ji ,jj,jk,jn) + ( 1. - zdir ) * pt_lev1(ji+1,jj,jk,jn) ! FC in the x-direction for T |
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175 | zfd(ji,jj,jk) = zdir * pt_lev1(ji+1,jj,jk,jn) + ( 1. - zdir ) * pt_lev1(ji ,jj,jk,jn) ! FD in the x-direction for T |
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176 | END DO |
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177 | END DO |
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178 | END DO |
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179 | !--- Lateral boundary conditions |
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180 | CALL lbc_lnk_multi( 'traadv_qck', zfu(:,:,:), 'T', 1. , zfd(:,:,:), 'T', 1., zfc(:,:,:), 'T', 1., zwx(:,:,:), 'T', 1. ) |
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181 | |
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182 | !--- QUICKEST scheme |
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183 | CALL quickest( zfu, zfd, zfc, zwx ) |
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184 | ! |
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185 | ! Mask at the T-points in the x-direction (mask=0 or mask=1) |
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186 | DO jk = 1, jpkm1 |
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187 | DO jj = 2, jpjm1 |
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188 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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189 | zfu(ji,jj,jk) = tmask(ji-1,jj,jk) + tmask(ji,jj,jk) + tmask(ji+1,jj,jk) - 2. |
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190 | END DO |
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191 | END DO |
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192 | END DO |
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193 | CALL lbc_lnk( 'traadv_qck', zfu(:,:,:), 'T', 1. ) ! Lateral boundary conditions |
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194 | |
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195 | ! |
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196 | ! Tracer flux on the x-direction |
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197 | DO jk = 1, jpkm1 |
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198 | ! |
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199 | DO jj = 2, jpjm1 |
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200 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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201 | zdir = 0.5 + SIGN( 0.5, pu(ji,jj,jk) ) ! if pu > 0 : zdir = 1 otherwise zdir = 0 |
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202 | !--- If the second ustream point is a land point |
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203 | !--- the flux is computed by the 1st order UPWIND scheme |
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204 | zmsk = zdir * zfu(ji,jj,jk) + ( 1. - zdir ) * zfu(ji+1,jj,jk) |
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205 | zwx(ji,jj,jk) = zmsk * zwx(ji,jj,jk) + ( 1. - zmsk ) * zfc(ji,jj,jk) |
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206 | zwx(ji,jj,jk) = zwx(ji,jj,jk) * pu(ji,jj,jk) |
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207 | END DO |
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208 | END DO |
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209 | END DO |
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210 | ! |
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211 | CALL lbc_lnk( 'traadv_qck', zwx(:,:,:), 'T', 1. ) ! Lateral boundary conditions |
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212 | ! |
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213 | ! Computation of the trend |
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214 | DO jk = 1, jpkm1 |
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215 | DO jj = 2, jpjm1 |
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216 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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217 | zbtr = r1_e1e2t(ji,jj) / e3t(ji,jj,jk,ktlev) |
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218 | ! horizontal advective trends |
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219 | ztra = - zbtr * ( zwx(ji,jj,jk) - zwx(ji-1,jj,jk) ) |
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220 | !--- add it to the general tracer trends |
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221 | pt_rhs(ji,jj,jk,jn) = pt_rhs(ji,jj,jk,jn) + ztra |
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222 | END DO |
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223 | END DO |
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224 | END DO |
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225 | ! ! trend diagnostics |
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226 | IF( l_trd ) CALL trd_tra( kt, cdtype, jn, jptra_xad, zwx, pu, pt_lev2(:,:,:,jn) ) |
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227 | ! |
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228 | END DO |
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229 | ! |
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230 | END SUBROUTINE tra_adv_qck_i |
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231 | |
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232 | |
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233 | SUBROUTINE tra_adv_qck_j( kt, ktlev, cdtype, p2dt, pv, & |
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234 | & pt_lev1, pt_lev2, pt_rhs, kjpt ) |
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235 | !!---------------------------------------------------------------------- |
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236 | !! |
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237 | !!---------------------------------------------------------------------- |
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238 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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239 | INTEGER , INTENT(in ) :: ktlev ! time level index for source terms |
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240 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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241 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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242 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
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243 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pv ! j-velocity components |
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244 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: pt_lev1, pt_lev2 ! before and now tracer fields |
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245 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pt_rhs ! tracer trend |
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246 | !! |
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247 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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248 | REAL(wp) :: ztra, zbtr, zdir, zdx, zmsk ! local scalars |
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249 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zwy, zfu, zfc, zfd ! 3D workspace |
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250 | !---------------------------------------------------------------------- |
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251 | ! |
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252 | ! ! =========== |
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253 | DO jn = 1, kjpt ! tracer loop |
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254 | ! ! =========== |
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255 | zfu(:,:,:) = 0.0 ; zfc(:,:,:) = 0.0 |
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256 | zfd(:,:,:) = 0.0 ; zwy(:,:,:) = 0.0 |
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257 | ! |
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258 | DO jk = 1, jpkm1 |
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259 | ! |
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260 | !--- Computation of the ustream and downstream value of the tracer and the mask |
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261 | DO jj = 2, jpjm1 |
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262 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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263 | ! Upstream in the x-direction for the tracer |
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264 | zfc(ji,jj,jk) = pt_lev1(ji,jj-1,jk,jn) |
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265 | ! Downstream in the x-direction for the tracer |
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266 | zfd(ji,jj,jk) = pt_lev1(ji,jj+1,jk,jn) |
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267 | END DO |
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268 | END DO |
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269 | END DO |
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270 | CALL lbc_lnk_multi( 'traadv_qck', zfc(:,:,:), 'T', 1. , zfd(:,:,:), 'T', 1. ) ! Lateral boundary conditions |
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271 | |
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272 | |
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273 | ! |
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274 | ! Horizontal advective fluxes |
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275 | ! --------------------------- |
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276 | ! |
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277 | DO jk = 1, jpkm1 |
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278 | DO jj = 2, jpjm1 |
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279 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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280 | zdir = 0.5 + SIGN( 0.5, pv(ji,jj,jk) ) ! if pu > 0 : zdir = 1 otherwise zdir = 0 |
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281 | zfu(ji,jj,jk) = zdir * zfc(ji,jj,jk ) + ( 1. - zdir ) * zfd(ji,jj+1,jk) ! FU in the x-direction for T |
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282 | END DO |
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283 | END DO |
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284 | END DO |
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285 | ! |
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286 | DO jk = 1, jpkm1 |
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287 | DO jj = 2, jpjm1 |
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288 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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289 | zdir = 0.5 + SIGN( 0.5, pv(ji,jj,jk) ) ! if pu > 0 : zdir = 1 otherwise zdir = 0 |
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290 | zdx = ( zdir * e2t(ji,jj) + ( 1. - zdir ) * e2t(ji,jj+1) ) * e1v(ji,jj) * e3v(ji,jj,jk,ktlev) |
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291 | zwy(ji,jj,jk) = ABS( pv(ji,jj,jk) ) * p2dt / zdx ! (0<zc_cfl<1 : Courant number on x-direction) |
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292 | zfc(ji,jj,jk) = zdir * pt_lev1(ji,jj ,jk,jn) + ( 1. - zdir ) * pt_lev1(ji,jj+1,jk,jn) ! FC in the x-direction for T |
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293 | zfd(ji,jj,jk) = zdir * pt_lev1(ji,jj+1,jk,jn) + ( 1. - zdir ) * pt_lev1(ji,jj ,jk,jn) ! FD in the x-direction for T |
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294 | END DO |
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295 | END DO |
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296 | END DO |
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297 | |
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298 | !--- Lateral boundary conditions |
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299 | CALL lbc_lnk_multi( 'traadv_qck', zfu(:,:,:), 'T', 1. , zfd(:,:,:), 'T', 1., zfc(:,:,:), 'T', 1., zwy(:,:,:), 'T', 1. ) |
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300 | |
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301 | !--- QUICKEST scheme |
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302 | CALL quickest( zfu, zfd, zfc, zwy ) |
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303 | ! |
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304 | ! Mask at the T-points in the x-direction (mask=0 or mask=1) |
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305 | DO jk = 1, jpkm1 |
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306 | DO jj = 2, jpjm1 |
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307 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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308 | zfu(ji,jj,jk) = tmask(ji,jj-1,jk) + tmask(ji,jj,jk) + tmask(ji,jj+1,jk) - 2. |
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309 | END DO |
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310 | END DO |
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311 | END DO |
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312 | CALL lbc_lnk( 'traadv_qck', zfu(:,:,:), 'T', 1. ) !--- Lateral boundary conditions |
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313 | ! |
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314 | ! Tracer flux on the x-direction |
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315 | DO jk = 1, jpkm1 |
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316 | ! |
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317 | DO jj = 2, jpjm1 |
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318 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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319 | zdir = 0.5 + SIGN( 0.5, pv(ji,jj,jk) ) ! if pu > 0 : zdir = 1 otherwise zdir = 0 |
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320 | !--- If the second ustream point is a land point |
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321 | !--- the flux is computed by the 1st order UPWIND scheme |
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322 | zmsk = zdir * zfu(ji,jj,jk) + ( 1. - zdir ) * zfu(ji,jj+1,jk) |
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323 | zwy(ji,jj,jk) = zmsk * zwy(ji,jj,jk) + ( 1. - zmsk ) * zfc(ji,jj,jk) |
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324 | zwy(ji,jj,jk) = zwy(ji,jj,jk) * pv(ji,jj,jk) |
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325 | END DO |
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326 | END DO |
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327 | END DO |
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328 | ! |
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329 | CALL lbc_lnk( 'traadv_qck', zwy(:,:,:), 'T', 1. ) ! Lateral boundary conditions |
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330 | ! |
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331 | ! Computation of the trend |
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332 | DO jk = 1, jpkm1 |
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333 | DO jj = 2, jpjm1 |
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334 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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335 | zbtr = r1_e1e2t(ji,jj) / e3t(ji,jj,jk,ktlev) |
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336 | ! horizontal advective trends |
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337 | ztra = - zbtr * ( zwy(ji,jj,jk) - zwy(ji,jj-1,jk) ) |
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338 | !--- add it to the general tracer trends |
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339 | pt_rhs(ji,jj,jk,jn) = pt_rhs(ji,jj,jk,jn) + ztra |
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340 | END DO |
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341 | END DO |
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342 | END DO |
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343 | ! ! trend diagnostics |
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344 | IF( l_trd ) CALL trd_tra( kt, cdtype, jn, jptra_yad, zwy, pv, pt_lev2(:,:,:,jn) ) |
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345 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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346 | IF( l_ptr ) CALL dia_ptr_hst( jn, 'adv', zwy(:,:,:) ) |
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347 | ! |
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348 | END DO |
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349 | ! |
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350 | END SUBROUTINE tra_adv_qck_j |
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351 | |
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352 | |
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353 | SUBROUTINE tra_adv_cen2_k( kt, ktlev, cdtype, pw, & |
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354 | & pt_lev2, pt_rhs, kjpt ) |
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355 | !!---------------------------------------------------------------------- |
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356 | !! |
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357 | !!---------------------------------------------------------------------- |
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358 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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359 | INTEGER , INTENT(in ) :: ktlev ! time level index for source terms |
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360 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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361 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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362 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pw ! vertical velocity |
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363 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: pt_lev2 ! before and now tracer fields |
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364 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pt_rhs ! tracer trend |
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365 | ! |
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366 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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367 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zwz ! 3D workspace |
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368 | !!---------------------------------------------------------------------- |
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369 | ! |
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370 | zwz(:,:, 1 ) = 0._wp ! surface & bottom values set to zero for all tracers |
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371 | zwz(:,:,jpk) = 0._wp |
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372 | ! |
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373 | ! ! =========== |
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374 | DO jn = 1, kjpt ! tracer loop |
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375 | ! ! =========== |
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376 | ! |
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377 | DO jk = 2, jpkm1 !* Interior point (w-masked 2nd order centered flux) |
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378 | DO jj = 2, jpjm1 |
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379 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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380 | zwz(ji,jj,jk) = 0.5 * pw(ji,jj,jk) * ( pt_lev2(ji,jj,jk-1,jn) + pt_lev2(ji,jj,jk,jn) ) * wmask(ji,jj,jk) |
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381 | END DO |
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382 | END DO |
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383 | END DO |
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384 | IF( ln_linssh ) THEN !* top value (only in linear free surf. as zwz is multiplied by wmask) |
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385 | IF( ln_isfcav ) THEN ! ice-shelf cavities (top of the ocean) |
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386 | DO jj = 1, jpj |
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387 | DO ji = 1, jpi |
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388 | zwz(ji,jj, mikt(ji,jj) ) = pw(ji,jj,mikt(ji,jj)) * pt_lev2(ji,jj,mikt(ji,jj),jn) ! linear free surface |
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389 | END DO |
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390 | END DO |
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391 | ELSE ! no ocean cavities (only ocean surface) |
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392 | zwz(:,:,1) = pw(:,:,1) * pt_lev2(:,:,1,jn) |
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393 | ENDIF |
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394 | ENDIF |
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395 | ! |
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396 | DO jk = 1, jpkm1 !== Tracer flux divergence added to the general trend ==! |
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397 | DO jj = 2, jpjm1 |
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398 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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399 | pt_rhs(ji,jj,jk,jn) = pt_rhs(ji,jj,jk,jn) - ( zwz(ji,jj,jk) - zwz(ji,jj,jk+1) ) & |
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400 | & * r1_e1e2t(ji,jj) / e3t(ji,jj,jk,ktlev) |
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401 | END DO |
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402 | END DO |
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403 | END DO |
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404 | ! ! Send trends for diagnostic |
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405 | IF( l_trd ) CALL trd_tra( kt, cdtype, jn, jptra_zad, zwz, pw, pt_lev2(:,:,:,jn) ) |
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406 | ! |
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407 | END DO |
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408 | ! |
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409 | END SUBROUTINE tra_adv_cen2_k |
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410 | |
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411 | |
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412 | SUBROUTINE quickest( pfu, pfd, pfc, puc ) |
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413 | !!---------------------------------------------------------------------- |
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414 | !! |
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415 | !! ** Purpose : Computation of advective flux with Quickest scheme |
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416 | !! |
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417 | !! ** Method : |
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418 | !!---------------------------------------------------------------------- |
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419 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pfu ! second upwind point |
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420 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pfd ! first douwning point |
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421 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pfc ! the central point (or the first upwind point) |
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422 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: puc ! input as Courant number ; output as flux |
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423 | !! |
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424 | INTEGER :: ji, jj, jk ! dummy loop indices |
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425 | REAL(wp) :: zcoef1, zcoef2, zcoef3 ! local scalars |
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426 | REAL(wp) :: zc, zcurv, zfho ! - - |
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427 | !---------------------------------------------------------------------- |
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428 | ! |
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429 | DO jk = 1, jpkm1 |
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430 | DO jj = 1, jpj |
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431 | DO ji = 1, jpi |
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432 | zc = puc(ji,jj,jk) ! Courant number |
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433 | zcurv = pfd(ji,jj,jk) + pfu(ji,jj,jk) - 2. * pfc(ji,jj,jk) |
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434 | zcoef1 = 0.5 * ( pfc(ji,jj,jk) + pfd(ji,jj,jk) ) |
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435 | zcoef2 = 0.5 * zc * ( pfd(ji,jj,jk) - pfc(ji,jj,jk) ) |
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436 | zcoef3 = ( 1. - ( zc * zc ) ) * r1_6 * zcurv |
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437 | zfho = zcoef1 - zcoef2 - zcoef3 ! phi_f QUICKEST |
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438 | ! |
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439 | zcoef1 = pfd(ji,jj,jk) - pfu(ji,jj,jk) |
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440 | zcoef2 = ABS( zcoef1 ) |
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441 | zcoef3 = ABS( zcurv ) |
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442 | IF( zcoef3 >= zcoef2 ) THEN |
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443 | zfho = pfc(ji,jj,jk) |
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444 | ELSE |
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445 | zcoef3 = pfu(ji,jj,jk) + ( ( pfc(ji,jj,jk) - pfu(ji,jj,jk) ) / MAX( zc, 1.e-9 ) ) ! phi_REF |
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446 | IF( zcoef1 >= 0. ) THEN |
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447 | zfho = MAX( pfc(ji,jj,jk), zfho ) |
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448 | zfho = MIN( zfho, MIN( zcoef3, pfd(ji,jj,jk) ) ) |
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449 | ELSE |
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450 | zfho = MIN( pfc(ji,jj,jk), zfho ) |
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451 | zfho = MAX( zfho, MAX( zcoef3, pfd(ji,jj,jk) ) ) |
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452 | ENDIF |
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453 | ENDIF |
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454 | puc(ji,jj,jk) = zfho |
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455 | END DO |
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456 | END DO |
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457 | END DO |
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458 | ! |
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459 | END SUBROUTINE quickest |
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460 | |
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461 | !!====================================================================== |
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462 | END MODULE traadv_qck |
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