1 | MODULE traadv_tvd |
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2 | !!============================================================================== |
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3 | !! *** MODULE traadv_tvd *** |
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4 | !! Ocean active tracers: horizontal & vertical advective trend |
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5 | !!============================================================================== |
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6 | |
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7 | !!---------------------------------------------------------------------- |
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8 | !! tra_adv_tvd : update the tracer trend with the horizontal |
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9 | !! and vertical advection trends using a TVD scheme |
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10 | !! nonosc : compute monotonic tracer fluxes by a nonoscillatory |
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11 | !! algorithm |
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12 | !!---------------------------------------------------------------------- |
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13 | !! * Modules used |
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14 | USE oce ! ocean dynamics and active tracers |
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15 | USE dom_oce ! ocean space and time domain |
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16 | USE trdmod ! ocean active tracers trends |
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17 | USE trdmod_oce ! ocean variables trends |
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18 | USE in_out_manager ! I/O manager |
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19 | USE dynspg_fsc ! surface pressure gradient |
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20 | USE dynspg_fsc_atsk ! autotasked surface pressure gradient |
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21 | USE trabbl ! Advective term of BBL |
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22 | USE lib_mpp |
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23 | USE lbclnk ! ocean lateral boundary condition (or mpp link) |
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24 | USE diaptr ! poleward transport diagnostics |
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25 | USE prtctl ! Print control |
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26 | |
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27 | |
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28 | IMPLICIT NONE |
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29 | PRIVATE |
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30 | |
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31 | !! * Accessibility |
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32 | PUBLIC tra_adv_tvd ! routine called by step.F90 |
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33 | |
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34 | !! * Substitutions |
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35 | # include "domzgr_substitute.h90" |
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36 | # include "vectopt_loop_substitute.h90" |
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37 | !!---------------------------------------------------------------------- |
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38 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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39 | !! $Header$ |
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40 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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41 | !!---------------------------------------------------------------------- |
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42 | |
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43 | CONTAINS |
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44 | |
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45 | SUBROUTINE tra_adv_tvd( kt ) |
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46 | !!---------------------------------------------------------------------- |
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47 | !! *** ROUTINE tra_adv_tvd *** |
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48 | !! |
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49 | !! ** Purpose : Compute the now trend due to total advection of |
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50 | !! tracers and add it to the general trend of tracer equations |
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51 | !! |
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52 | !! ** Method : TVD scheme, i.e. 2nd order centered scheme with |
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53 | !! corrected flux (monotonic correction) |
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54 | !! note: - this advection scheme needs a leap-frog time scheme |
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55 | !! |
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56 | !! ** Action : - update (ta,sa) with the now advective tracer trends |
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57 | !! - save the trends in (ttrdh,strdh) ('key_trdtra') |
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58 | !! |
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59 | !! History : |
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60 | !! ! 95-12 (L. Mortier) Original code |
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61 | !! ! 00-01 (H. Loukos) adapted to ORCA |
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62 | !! ! 00-10 (MA Foujols E.Kestenare) include file not routine |
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63 | !! ! 00-12 (E. Kestenare M. Levy) fix bug in trtrd indexes |
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64 | !! ! 01-07 (E. Durand G. Madec) adaptation to ORCA config |
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65 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
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66 | !! 9.0 ! 04-01 (A. de Miranda, G. Madec, J.M. Molines ): advective bbl |
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67 | !! 9.0 ! 08-04 (S. Cravatte) add the i-, j- & k- trends computation |
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68 | !!---------------------------------------------------------------------- |
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69 | !! * Modules used |
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70 | #if defined key_trabbl_adv |
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71 | USE oce , zun => ua, & ! use ua as workspace |
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72 | & zvn => va ! use va as workspace |
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73 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zwn |
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74 | #else |
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75 | USE oce , zun => un, & ! When no bbl, zun == un |
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76 | zvn => vn, & ! zvn == vn |
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77 | zwn => wn ! zwn == wn |
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78 | #endif |
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79 | USE trdmod_oce , ztay => tladj, & ! use tladj latter |
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80 | & zsay => sladj, & ! use sladj latter |
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81 | & ztaz => tladi, & ! use ua as workspace |
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82 | & zsaz => sladi ! use ua as workspace |
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83 | |
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84 | !! * Arguments |
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85 | INTEGER, INTENT( in ) :: kt ! ocean time-step |
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86 | |
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87 | !! * Local declarations |
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88 | INTEGER :: ji, jj, jk ! dummy loop indices |
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89 | REAL(wp) :: & ! temporary scalar |
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90 | ztai, ztaj, ztak, & ! " " |
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91 | zsai, zsaj, zsak ! " " |
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92 | REAL(wp), DIMENSION (jpi,jpj,jpk) :: & |
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93 | zti, ztu, ztv, ztw, & ! temporary workspace |
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94 | zsi, zsu, zsv, zsw, & ! " " |
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95 | ztdta, ztdsa ! " " |
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96 | REAL(wp) :: & |
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97 | z2dtt, zbtr, zeu, zev, zew, z2, & ! temporary scalar |
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98 | zfp_ui, zfp_vj, zfp_wk, & ! " " |
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99 | zfm_ui, zfm_vj, zfm_wk ! " " |
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100 | !!---------------------------------------------------------------------- |
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101 | |
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102 | IF( kt == nit000 .AND. lwp ) THEN |
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103 | WRITE(numout,*) |
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104 | WRITE(numout,*) 'tra_adv_tvd : TVD advection scheme' |
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105 | WRITE(numout,*) '~~~~~~~~~~~' |
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106 | ENDIF |
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107 | |
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108 | IF( neuler == 0 .AND. kt == nit000 ) THEN |
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109 | z2=1. |
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110 | ELSE |
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111 | z2=2. |
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112 | ENDIF |
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113 | |
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114 | ! Save ta and sa trends |
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115 | IF( l_trdtra ) THEN |
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116 | ztdta(:,:,:) = ta(:,:,:) |
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117 | ztdsa(:,:,:) = sa(:,:,:) |
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118 | l_adv = 'tvd' |
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119 | ENDIF |
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120 | |
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121 | #if defined key_trabbl_adv |
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122 | ! Advective Bottom boundary layer: add the velocity |
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123 | ! ------------------------------------------------- |
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124 | zun(:,:,:) = un (:,:,:) - u_bbl(:,:,:) |
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125 | zvn(:,:,:) = vn (:,:,:) - v_bbl(:,:,:) |
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126 | zwn(:,:,:) = wn (:,:,:) + w_bbl(:,:,:) |
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127 | #endif |
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128 | |
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129 | ! 1. Bottom value : flux set to zero |
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130 | ! --------------- |
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131 | ztu(:,:,jpk) = 0.e0 ; zsu(:,:,jpk) = 0.e0 |
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132 | ztv(:,:,jpk) = 0.e0 ; zsv(:,:,jpk) = 0.e0 |
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133 | ztw(:,:,jpk) = 0.e0 ; zsw(:,:,jpk) = 0.e0 |
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134 | zti(:,:,jpk) = 0.e0 ; zsi(:,:,jpk) = 0.e0 |
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135 | |
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136 | |
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137 | ! 2. upstream advection with initial mass fluxes & intermediate update |
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138 | ! -------------------------------------------------------------------- |
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139 | ! upstream tracer flux in the i and j direction |
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140 | DO jk = 1, jpkm1 |
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141 | DO jj = 1, jpjm1 |
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142 | DO ji = 1, fs_jpim1 ! vector opt. |
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143 | zeu = 0.5 * e2u(ji,jj) * fse3u(ji,jj,jk) * zun(ji,jj,jk) |
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144 | zev = 0.5 * e1v(ji,jj) * fse3v(ji,jj,jk) * zvn(ji,jj,jk) |
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145 | ! upstream scheme |
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146 | zfp_ui = zeu + ABS( zeu ) |
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147 | zfm_ui = zeu - ABS( zeu ) |
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148 | zfp_vj = zev + ABS( zev ) |
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149 | zfm_vj = zev - ABS( zev ) |
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150 | ztu(ji,jj,jk) = zfp_ui * tb(ji,jj,jk) + zfm_ui * tb(ji+1,jj ,jk) |
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151 | ztv(ji,jj,jk) = zfp_vj * tb(ji,jj,jk) + zfm_vj * tb(ji ,jj+1,jk) |
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152 | zsu(ji,jj,jk) = zfp_ui * sb(ji,jj,jk) + zfm_ui * sb(ji+1,jj ,jk) |
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153 | zsv(ji,jj,jk) = zfp_vj * sb(ji,jj,jk) + zfm_vj * sb(ji ,jj+1,jk) |
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154 | END DO |
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155 | END DO |
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156 | END DO |
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157 | |
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158 | ! upstream tracer flux in the k direction |
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159 | ! Surface value |
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160 | IF( lk_dynspg_fsc .OR. lk_dynspg_fsc_tsk ) THEN ! free surface-constant volume |
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161 | DO jj = 1, jpj |
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162 | DO ji = 1, jpi |
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163 | zew = e1t(ji,jj) * e2t(ji,jj) * zwn(ji,jj,1) |
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164 | ztw(ji,jj,1) = zew * tb(ji,jj,1) |
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165 | zsw(ji,jj,1) = zew * sb(ji,jj,1) |
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166 | END DO |
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167 | END DO |
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168 | ELSE ! rigid lid : flux set to zero |
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169 | ztw(:,:,1) = 0.e0 |
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170 | zsw(:,:,1) = 0.e0 |
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171 | ENDIF |
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172 | |
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173 | ! Interior value |
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174 | DO jk = 2, jpkm1 |
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175 | DO jj = 1, jpj |
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176 | DO ji = 1, jpi |
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177 | zew = 0.5 * e1t(ji,jj) * e2t(ji,jj) * zwn(ji,jj,jk) |
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178 | zfp_wk = zew + ABS( zew ) |
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179 | zfm_wk = zew - ABS( zew ) |
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180 | ztw(ji,jj,jk) = zfp_wk * tb(ji,jj,jk) + zfm_wk * tb(ji,jj,jk-1) |
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181 | zsw(ji,jj,jk) = zfp_wk * sb(ji,jj,jk) + zfm_wk * sb(ji,jj,jk-1) |
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182 | END DO |
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183 | END DO |
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184 | END DO |
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185 | |
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186 | ! total advective trend |
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187 | DO jk = 1, jpkm1 |
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188 | DO jj = 2, jpjm1 |
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189 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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190 | zbtr = 1./ ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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191 | |
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192 | ! i- j- horizontal & k- vertical advective trends |
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193 | ztai = - ( ztu(ji,jj,jk) - ztu(ji-1,jj ,jk ) ) * zbtr |
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194 | ztaj = - ( ztv(ji,jj,jk) - ztv(ji ,jj-1,jk ) ) * zbtr |
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195 | ztak = - ( ztw(ji,jj,jk) - ztw(ji ,jj ,jk+1) ) * zbtr |
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196 | zsai = - ( zsu(ji,jj,jk) - zsu(ji-1,jj ,jk ) ) * zbtr |
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197 | zsaj = - ( zsv(ji,jj,jk) - zsv(ji ,jj-1,jk ) ) * zbtr |
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198 | zsak = - ( zsw(ji,jj,jk) - zsw(ji ,jj ,jk+1) ) * zbtr |
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199 | |
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200 | ! total intermediate advective trends |
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201 | zti(ji,jj,jk) = ztai + ztaj + ztak |
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202 | zsi(ji,jj,jk) = zsai + zsaj + zsak |
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203 | END DO |
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204 | END DO |
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205 | END DO |
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206 | |
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207 | ! Save the intermediate vertical & j- horizontal advection trends |
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208 | IF( l_trdtra ) THEN |
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209 | DO jk = 1, jpkm1 |
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210 | DO jj = 2, jpjm1 |
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211 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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212 | zbtr = 1./ ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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213 | ztay(ji,jj,jk) = - ( ztv(ji,jj,jk) - ztv(ji ,jj-1,jk ) ) * zbtr |
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214 | zsay(ji,jj,jk) = - ( zsv(ji,jj,jk) - zsv(ji ,jj-1,jk ) ) * zbtr |
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215 | ztaz(ji,jj,jk) = - ( ztw(ji,jj,jk) - ztw(ji ,jj ,jk+1) ) * zbtr |
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216 | zsaz(ji,jj,jk) = - ( zsw(ji,jj,jk) - zsw(ji ,jj ,jk+1) ) * zbtr |
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217 | END DO |
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218 | END DO |
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219 | END DO |
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220 | ENDIF |
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221 | |
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222 | ! update and guess with monotonic sheme |
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223 | DO jk = 1, jpkm1 |
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224 | z2dtt = z2 * rdttra(jk) |
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225 | DO jj = 2, jpjm1 |
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226 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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227 | ta(ji,jj,jk) = ta(ji,jj,jk) + zti(ji,jj,jk) |
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228 | sa(ji,jj,jk) = sa(ji,jj,jk) + zsi(ji,jj,jk) |
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229 | zti (ji,jj,jk) = ( tb(ji,jj,jk) + z2dtt * zti(ji,jj,jk) ) * tmask(ji,jj,jk) |
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230 | zsi (ji,jj,jk) = ( sb(ji,jj,jk) + z2dtt * zsi(ji,jj,jk) ) * tmask(ji,jj,jk) |
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231 | END DO |
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232 | END DO |
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233 | END DO |
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234 | |
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235 | ! Lateral boundary conditions on zti, zsi (unchanged sign) |
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236 | CALL lbc_lnk( zti, 'T', 1. ) |
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237 | CALL lbc_lnk( zsi, 'T', 1. ) |
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238 | |
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239 | |
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240 | ! 3. antidiffusive flux : high order minus low order |
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241 | ! -------------------------------------------------- |
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242 | ! antidiffusive flux on i and j |
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243 | DO jk = 1, jpkm1 |
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244 | DO jj = 1, jpjm1 |
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245 | DO ji = 1, fs_jpim1 ! vector opt. |
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246 | zeu = 0.5 * e2u(ji,jj) * fse3u(ji,jj,jk) * zun(ji,jj,jk) |
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247 | zev = 0.5 * e1v(ji,jj) * fse3v(ji,jj,jk) * zvn(ji,jj,jk) |
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248 | ztu(ji,jj,jk) = zeu * ( tn(ji,jj,jk) + tn(ji+1,jj,jk) ) - ztu(ji,jj,jk) |
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249 | zsu(ji,jj,jk) = zeu * ( sn(ji,jj,jk) + sn(ji+1,jj,jk) ) - zsu(ji,jj,jk) |
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250 | ztv(ji,jj,jk) = zev * ( tn(ji,jj,jk) + tn(ji,jj+1,jk) ) - ztv(ji,jj,jk) |
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251 | zsv(ji,jj,jk) = zev * ( sn(ji,jj,jk) + sn(ji,jj+1,jk) ) - zsv(ji,jj,jk) |
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252 | END DO |
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253 | END DO |
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254 | END DO |
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255 | |
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256 | ! antidiffusive flux on k |
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257 | ! Surface value |
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258 | ztw(:,:,1) = 0. |
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259 | zsw(:,:,1) = 0. |
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260 | |
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261 | ! Interior value |
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262 | DO jk = 2, jpkm1 |
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263 | DO jj = 1, jpj |
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264 | DO ji = 1, jpi |
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265 | zew = 0.5 * e1t(ji,jj) * e2t(ji,jj) * zwn(ji,jj,jk) |
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266 | ztw(ji,jj,jk) = zew * ( tn(ji,jj,jk) + tn(ji,jj,jk-1) ) - ztw(ji,jj,jk) |
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267 | zsw(ji,jj,jk) = zew * ( sn(ji,jj,jk) + sn(ji,jj,jk-1) ) - zsw(ji,jj,jk) |
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268 | END DO |
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269 | END DO |
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270 | END DO |
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271 | |
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272 | ! Lateral bondary conditions |
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273 | CALL lbc_lnk( ztu, 'U', -1. ) ; CALL lbc_lnk( zsu, 'U', -1. ) |
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274 | CALL lbc_lnk( ztv, 'V', -1. ) ; CALL lbc_lnk( zsv, 'V', -1. ) |
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275 | CALL lbc_lnk( ztw, 'W', 1. ) ; CALL lbc_lnk( zsw, 'W', 1. ) |
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276 | |
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277 | ! 4. monotonicity algorithm |
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278 | ! ------------------------- |
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279 | CALL nonosc( tb, ztu, ztv, ztw, zti, z2 ) |
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280 | CALL nonosc( sb, zsu, zsv, zsw, zsi, z2 ) |
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281 | |
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282 | |
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283 | ! 5. final trend with corrected fluxes |
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284 | ! ------------------------------------ |
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285 | DO jk = 1, jpkm1 |
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286 | DO jj = 2, jpjm1 |
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287 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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288 | zbtr = 1. / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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289 | ! i- j- horizontal & k- vertical advective trends |
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290 | ztai = - ( ztu(ji,jj,jk) - ztu(ji-1,jj ,jk )) * zbtr |
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291 | ztaj = - ( ztv(ji,jj,jk) - ztv(ji ,jj-1,jk )) * zbtr |
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292 | ztak = - ( ztw(ji,jj,jk) - ztw(ji ,jj ,jk+1)) * zbtr |
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293 | zsai = - ( zsu(ji,jj,jk) - zsu(ji-1,jj ,jk )) * zbtr |
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294 | zsaj = - ( zsv(ji,jj,jk) - zsv(ji ,jj-1,jk )) * zbtr |
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295 | zsak = - ( zsw(ji,jj,jk) - zsw(ji ,jj ,jk+1)) * zbtr |
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296 | |
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297 | ! add them to the general tracer trends |
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298 | ta(ji,jj,jk) = ta(ji,jj,jk) + ztai + ztaj + ztak |
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299 | sa(ji,jj,jk) = sa(ji,jj,jk) + zsai + zsaj + zsak |
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300 | END DO |
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301 | END DO |
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302 | END DO |
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303 | |
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304 | ! save the advective trends for diagnostic |
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305 | ! tracers trends |
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306 | IF( l_trdtra ) THEN |
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307 | ! Compute the final vertical & j- horizontal advection trends |
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308 | DO jk = 1, jpkm1 |
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309 | DO jj = 2, jpjm1 |
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310 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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311 | zbtr = 1./ ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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312 | ztay(ji,jj,jk) = - ( ztv(ji,jj,jk) - ztv(ji ,jj-1,jk ) ) * zbtr & |
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313 | & + ztay(ji,jj,jk) |
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314 | zsay(ji,jj,jk) = - ( zsv(ji,jj,jk) - zsv(ji ,jj-1,jk ) ) * zbtr & |
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315 | & + zsay(ji,jj,jk) |
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316 | ztaz(ji,jj,jk) = - ( ztw(ji,jj,jk) - ztw(ji ,jj ,jk+1) ) * zbtr & |
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317 | & + ztaz(ji,jj,jk) |
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318 | zsaz(ji,jj,jk) = - ( zsw(ji,jj,jk) - zsw(ji ,jj ,jk+1) ) * zbtr & |
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319 | & + zsaz(ji,jj,jk) |
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320 | END DO |
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321 | END DO |
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322 | END DO |
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323 | |
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324 | ! horizontal advection: |
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325 | ! make the difference between the new trends ta()/sa() and the |
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326 | ! previous one ztdta()/ztdsa() to have the total advection trends |
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327 | ! to which we substract the vertical trends ztaz()/zsaz() |
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328 | ztdta(:,:,:) = ta(:,:,:) - ztdta(:,:,:) - ztaz(:,:,:) |
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329 | ztdsa(:,:,:) = sa(:,:,:) - ztdsa(:,:,:) - zsaz(:,:,:) |
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330 | |
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331 | ! Add the term tn()/sn()*hdivn() to recover the Uh gradh(T/S) trends |
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332 | ztdta(:,:,:) = ztdta(:,:,:) + tn(:,:,:) * hdivn(:,:,:) |
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333 | ztdsa(:,:,:) = ztdsa(:,:,:) + sn(:,:,:) * hdivn(:,:,:) |
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334 | |
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335 | CALL trd_mod(ztdta, ztdsa, jpttdlad, 'TRA', kt) |
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336 | |
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337 | ! vertical advection: |
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338 | ! Substract the term tn()/sn()*hdivn() to recover the W gradz(T/S) trends |
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339 | ztaz(:,:,:) = ztaz(:,:,:) - tn(:,:,:) * hdivn(:,:,:) |
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340 | zsaz(:,:,:) = zsaz(:,:,:) - sn(:,:,:) * hdivn(:,:,:) |
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341 | |
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342 | CALL trd_mod(ztaz, zsaz, jpttdzad, 'TRA', kt) |
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343 | |
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344 | ENDIF |
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345 | |
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346 | IF(ln_ctl) THEN |
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347 | CALL prt_ctl(tab3d_1=ta, clinfo1=' tvd adv - Ta: ', mask1=tmask, & |
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348 | & tab3d_2=sa, clinfo2=' Sa: ', mask2=tmask, clinfo3='tra') |
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349 | ENDIF |
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350 | |
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351 | ! "zonal" mean advective heat and salt transport |
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352 | IF( ln_diaptr .AND. ( MOD( kt, nf_ptr ) == 0 ) ) THEN |
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353 | pht_adv(:) = ptr_vj( ztv(:,:,:) ) |
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354 | pst_adv(:) = ptr_vj( zsv(:,:,:) ) |
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355 | ENDIF |
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356 | |
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357 | END SUBROUTINE tra_adv_tvd |
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358 | |
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359 | |
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360 | SUBROUTINE nonosc( pbef, paa, pbb, pcc, paft, prdt ) |
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361 | !!--------------------------------------------------------------------- |
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362 | !! *** ROUTINE nonosc *** |
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363 | !! |
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364 | !! ** Purpose : compute monotonic tracer fluxes from the upstream |
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365 | !! scheme and the before field by a nonoscillatory algorithm |
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366 | !! |
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367 | !! ** Method : ... ??? |
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368 | !! warning : pbef and paft must be masked, but the boundaries |
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369 | !! conditions on the fluxes are not necessary zalezak (1979) |
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370 | !! drange (1995) multi-dimensional forward-in-time and upstream- |
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371 | !! in-space based differencing for fluid |
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372 | !! |
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373 | !! History : |
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374 | !! ! 97-04 (L. Mortier) Original code |
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375 | !! ! 00-02 (H. Loukos) rewritting for opa8 |
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376 | !! ! 00-10 (M.A Foujols, E. Kestenare) lateral b.c. |
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377 | !! ! 01-03 (E. Kestenare) add key_passivetrc |
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378 | !! ! 01-07 (E. Durand G. Madec) adapted for T & S |
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379 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
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380 | !!---------------------------------------------------------------------- |
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381 | !! * Arguments |
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382 | REAL(wp), INTENT( in ) :: & |
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383 | prdt ! ??? |
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384 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT( inout ) :: & |
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385 | pbef, & ! before field |
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386 | paft, & ! after field |
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387 | paa, & ! monotonic flux in the i direction |
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388 | pbb, & ! monotonic flux in the j direction |
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389 | pcc ! monotonic flux in the k direction |
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390 | |
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391 | !! * Local declarations |
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392 | INTEGER :: ji, jj, jk ! dummy loop indices |
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393 | INTEGER :: ikm1 |
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394 | REAL(wp), DIMENSION (jpi,jpj,jpk) :: zbetup, zbetdo |
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395 | REAL(wp) :: zpos, zneg, zbt, za, zb, zc, zbig, zrtrn, z2dtt |
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396 | !!---------------------------------------------------------------------- |
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397 | |
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398 | zbig = 1.e+40 |
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399 | zrtrn = 1.e-15 |
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400 | |
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401 | ! Search local extrema |
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402 | ! -------------------- |
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403 | ! large negative value (-zbig) inside land |
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404 | pbef(:,:,:) = pbef(:,:,:) * tmask(:,:,:) - zbig * ( 1.e0 - tmask(:,:,:) ) |
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405 | paft(:,:,:) = paft(:,:,:) * tmask(:,:,:) - zbig * ( 1.e0 - tmask(:,:,:) ) |
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406 | ! search maximum in neighbourhood |
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407 | DO jk = 1, jpkm1 |
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408 | ikm1 = MAX(jk-1,1) |
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409 | DO jj = 2, jpjm1 |
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410 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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411 | zbetup(ji,jj,jk) = MAX( pbef(ji ,jj ,jk ), paft(ji ,jj ,jk ), & |
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412 | & pbef(ji-1,jj ,jk ), pbef(ji+1,jj ,jk ), & |
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413 | & paft(ji-1,jj ,jk ), paft(ji+1,jj ,jk ), & |
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414 | & pbef(ji ,jj-1,jk ), pbef(ji ,jj+1,jk ), & |
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415 | & paft(ji ,jj-1,jk ), paft(ji ,jj+1,jk ), & |
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416 | & pbef(ji ,jj ,ikm1), pbef(ji ,jj ,jk+1), & |
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417 | & paft(ji ,jj ,ikm1), paft(ji ,jj ,jk+1) ) |
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418 | END DO |
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419 | END DO |
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420 | END DO |
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421 | ! large positive value (+zbig) inside land |
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422 | pbef(:,:,:) = pbef(:,:,:) * tmask(:,:,:) + zbig * ( 1.e0 - tmask(:,:,:) ) |
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423 | paft(:,:,:) = paft(:,:,:) * tmask(:,:,:) + zbig * ( 1.e0 - tmask(:,:,:) ) |
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424 | ! search minimum in neighbourhood |
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425 | DO jk = 1, jpkm1 |
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426 | ikm1 = MAX(jk-1,1) |
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427 | DO jj = 2, jpjm1 |
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428 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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429 | zbetdo(ji,jj,jk) = MIN( pbef(ji ,jj ,jk ), paft(ji ,jj ,jk ), & |
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430 | & pbef(ji-1,jj ,jk ), pbef(ji+1,jj ,jk ), & |
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431 | & paft(ji-1,jj ,jk ), paft(ji+1,jj ,jk ), & |
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432 | & pbef(ji ,jj-1,jk ), pbef(ji ,jj+1,jk ), & |
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433 | & paft(ji ,jj-1,jk ), paft(ji ,jj+1,jk ), & |
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434 | & pbef(ji ,jj ,ikm1), pbef(ji ,jj ,jk+1), & |
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435 | & paft(ji ,jj ,ikm1), paft(ji ,jj ,jk+1) ) |
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436 | END DO |
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437 | END DO |
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438 | END DO |
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439 | |
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440 | ! restore masked values to zero |
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441 | pbef(:,:,:) = pbef(:,:,:) * tmask(:,:,:) |
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442 | paft(:,:,:) = paft(:,:,:) * tmask(:,:,:) |
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443 | |
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444 | |
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445 | ! 2. Positive and negative part of fluxes and beta terms |
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446 | ! ------------------------------------------------------ |
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447 | |
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448 | DO jk = 1, jpkm1 |
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449 | z2dtt = prdt * rdttra(jk) |
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450 | DO jj = 2, jpjm1 |
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451 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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452 | ! positive & negative part of the flux |
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453 | zpos = MAX( 0., paa(ji-1,jj ,jk ) ) - MIN( 0., paa(ji ,jj ,jk ) ) & |
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454 | & + MAX( 0., pbb(ji ,jj-1,jk ) ) - MIN( 0., pbb(ji ,jj ,jk ) ) & |
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455 | & + MAX( 0., pcc(ji ,jj ,jk+1) ) - MIN( 0., pcc(ji ,jj ,jk ) ) |
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456 | zneg = MAX( 0., paa(ji ,jj ,jk ) ) - MIN( 0., paa(ji-1,jj ,jk ) ) & |
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457 | & + MAX( 0., pbb(ji ,jj ,jk ) ) - MIN( 0., pbb(ji ,jj-1,jk ) ) & |
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458 | & + MAX( 0., pcc(ji ,jj ,jk ) ) - MIN( 0., pcc(ji ,jj ,jk+1) ) |
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459 | ! up & down beta terms |
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460 | zbt = e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) / z2dtt |
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461 | zbetup(ji,jj,jk) = ( zbetup(ji,jj,jk) - paft(ji,jj,jk) ) / (zpos+zrtrn) * zbt |
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462 | zbetdo(ji,jj,jk) = ( paft(ji,jj,jk) - zbetdo(ji,jj,jk) ) / (zneg+zrtrn) * zbt |
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463 | END DO |
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464 | END DO |
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465 | END DO |
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466 | |
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467 | ! lateral boundary condition on zbetup & zbetdo (unchanged sign) |
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468 | CALL lbc_lnk( zbetup, 'T', 1. ) |
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469 | CALL lbc_lnk( zbetdo, 'T', 1. ) |
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470 | |
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471 | |
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472 | ! 3. monotonic flux in the i & j direction (paa & pbb) |
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473 | ! ---------------------------------------- |
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474 | DO jk = 1, jpkm1 |
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475 | DO jj = 2, jpjm1 |
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476 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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477 | za = MIN( 1.e0, zbetdo(ji,jj,jk), zbetup(ji+1,jj,jk) ) |
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478 | zb = MIN( 1.e0, zbetup(ji,jj,jk), zbetdo(ji+1,jj,jk) ) |
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479 | zc = 0.5 * ( 1.e0 + SIGN( 1.e0, paa(ji,jj,jk) ) ) |
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480 | paa(ji,jj,jk) = paa(ji,jj,jk) * ( zc * za + ( 1.e0 - zc) * zb ) |
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481 | |
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482 | za = MIN( 1.e0, zbetdo(ji,jj,jk), zbetup(ji,jj+1,jk) ) |
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483 | zb = MIN( 1.e0, zbetup(ji,jj,jk), zbetdo(ji,jj+1,jk) ) |
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484 | zc = 0.5 * ( 1.e0 + SIGN( 1.e0, pbb(ji,jj,jk) ) ) |
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485 | pbb(ji,jj,jk) = pbb(ji,jj,jk) * ( zc * za + ( 1.e0 - zc) * zb ) |
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486 | END DO |
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487 | END DO |
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488 | END DO |
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489 | |
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490 | |
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491 | ! monotonic flux in the k direction, i.e. pcc |
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492 | ! ------------------------------------------- |
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493 | DO jk = 2, jpkm1 |
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494 | DO jj = 2, jpjm1 |
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495 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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496 | |
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497 | za = MIN( 1., zbetdo(ji,jj,jk), zbetup(ji,jj,jk-1) ) |
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498 | zb = MIN( 1., zbetup(ji,jj,jk), zbetdo(ji,jj,jk-1) ) |
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499 | zc = 0.5 * ( 1.e0 + SIGN( 1.e0, pcc(ji,jj,jk) ) ) |
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500 | pcc(ji,jj,jk) = pcc(ji,jj,jk) * ( zc * za + ( 1.e0 - zc) * zb ) |
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501 | END DO |
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502 | END DO |
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503 | END DO |
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504 | |
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505 | ! lateral boundary condition on paa, pbb, pcc |
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506 | CALL lbc_lnk( paa, 'U', -1. ) ! changed sign |
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507 | CALL lbc_lnk( pbb, 'V', -1. ) ! changed sign |
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508 | CALL lbc_lnk( pcc, 'W', 1. ) ! NO changed sign |
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509 | |
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510 | END SUBROUTINE nonosc |
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511 | |
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512 | !!====================================================================== |
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513 | END MODULE traadv_tvd |
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