1 | MODULE trcadv_tvd |
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2 | !!============================================================================== |
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3 | !! *** MODULE trcadv_tvd *** |
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4 | !! Ocean passive tracers: horizontal & vertical advective trend |
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5 | !!============================================================================== |
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6 | #if defined key_passivetrc |
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7 | !!---------------------------------------------------------------------- |
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8 | !! trc_adv_tvd : update the passive 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_trc ! ocean dynamics and active tracers variables |
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15 | USE trc ! ocean passive tracers variables |
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16 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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17 | USE trcbbl ! advective passive tracers in the BBL |
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18 | USE prtctl_trc ! Print control for debbuging |
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19 | |
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20 | IMPLICIT NONE |
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21 | PRIVATE |
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22 | |
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23 | !! * Accessibility |
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24 | PUBLIC trc_adv_tvd ! routine called by trcstp.F90 |
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25 | |
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26 | !! * Substitutions |
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27 | # include "passivetrc_substitute.h90" |
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28 | !!---------------------------------------------------------------------- |
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29 | !! OPA 9.0 , LODYC-IPSL (2003) |
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30 | !!---------------------------------------------------------------------- |
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31 | |
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32 | CONTAINS |
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33 | |
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34 | SUBROUTINE trc_adv_tvd( kt ) |
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35 | !!---------------------------------------------------------------------- |
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36 | !! *** ROUTINE trc_adv_tvd *** |
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37 | !! |
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38 | !! ** Purpose : Compute the now trend due to total advection of |
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39 | !! tracers and add it to the general trend of tracer equations |
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40 | !! |
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41 | !! ** Method : TVD scheme, i.e. 2nd order centered scheme with |
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42 | !! corrected flux (monotonic correction) |
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43 | !! note: - this advection scheme needs a leap-frog time scheme |
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44 | !! |
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45 | !! ** Action : - update tra with the now advective tracer trends |
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46 | !! - save the trends in trtrd ('key_trc_diatrd) |
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47 | !! |
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48 | !! History : |
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49 | !! ! 95-12 (L. Mortier) Original code |
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50 | !! ! 00-01 (H. Loukos) adapted to ORCA |
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51 | !! ! 00-10 (MA Foujols E.Kestenare) include file not routine |
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52 | !! ! 00-12 (E. Kestenare M. Levy) fix bug in trtrd indexes |
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53 | !! ! 01-07 (E. Durand G. Madec) adaptation to ORCA config |
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54 | !! 9.0 ! 02-06 (C. Ethe, G. Madec) F90: Free form and module |
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55 | !!---------------------------------------------------------------------- |
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56 | !! * Modules used |
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57 | #if defined key_trcbbl_adv |
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58 | USE oce_trc , zun => ua, & ! use ua as workspace |
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59 | & zvn => va ! use va as workspace |
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60 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zwn |
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61 | #else |
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62 | USE oce_trc , zun => un, & ! When no bbl, zun == un |
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63 | zvn => vn, & ! zvn == vn |
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64 | zwn => wn ! zwn == wn |
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65 | #endif |
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66 | !! * Arguments |
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67 | INTEGER, INTENT( in ) :: kt ! ocean time-step |
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68 | |
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69 | !! * Local declarations |
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70 | INTEGER :: ji, jj, jk,jn ! dummy loop indices |
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71 | REAL(wp) :: ztra ! temporary scalar |
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72 | |
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73 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: & |
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74 | zti, ztu, ztv, ztw ! temporary workspace |
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75 | |
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76 | REAL(wp) :: & |
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77 | z2dtt, zbtr, zeu, zev, zew, z2, & ! temporary scalar |
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78 | zfp_ui, zfp_vj, zfp_wk, & ! " " |
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79 | zfm_ui, zfm_vj, zfm_wk ! " " |
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80 | |
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81 | CHARACTER (len=22) :: charout |
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82 | !!---------------------------------------------------------------------- |
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83 | |
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84 | IF( kt == nittrc000 .AND. lwp ) THEN |
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85 | WRITE(numout,*) |
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86 | WRITE(numout,*) 'trc_adv_tvd : TVD advection scheme' |
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87 | WRITE(numout,*) '~~~~~~~~~~~' |
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88 | ENDIF |
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89 | |
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90 | IF( neuler == 0 .AND. kt == nittrc000 ) THEN |
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91 | z2=1. |
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92 | ELSE |
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93 | z2=2. |
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94 | ENDIF |
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95 | |
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96 | #if defined key_trcbbl_adv |
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97 | ! Advective Bottom boundary layer: add the velocity |
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98 | ! ------------------------------------------------- |
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99 | zun(:,:,:) = un (:,:,:) - u_trc_bbl(:,:,:) |
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100 | zvn(:,:,:) = vn (:,:,:) - v_trc_bbl(:,:,:) |
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101 | zwn(:,:,:) = wn (:,:,:) + w_trc_bbl(:,:,:) |
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102 | #endif |
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103 | |
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104 | DO jn = 1, jptra |
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105 | |
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106 | ! 1. Bottom value : flux set to zero |
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107 | ! --------------- |
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108 | ztu(:,:,jpk) = 0.e0 |
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109 | ztv(:,:,jpk) = 0.e0 |
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110 | ztw(:,:,jpk) = 0.e0 |
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111 | zti(:,:,jpk) = 0.e0 |
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112 | |
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113 | |
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114 | ! 2. upstream advection with initial mass fluxes & intermediate update |
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115 | ! -------------------------------------------------------------------- |
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116 | ! upstream tracer flux in the i and j direction |
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117 | DO jk = 1, jpkm1 |
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118 | DO jj = 1, jpjm1 |
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119 | DO ji = 1, fs_jpim1 ! vector opt. |
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120 | zeu = 0.5 * e2u(ji,jj) * fse3u(ji,jj,jk) * zun(ji,jj,jk) |
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121 | zev = 0.5 * e1v(ji,jj) * fse3v(ji,jj,jk) * zvn(ji,jj,jk) |
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122 | ! upstream scheme |
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123 | zfp_ui = zeu + ABS( zeu ) |
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124 | zfm_ui = zeu - ABS( zeu ) |
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125 | zfp_vj = zev + ABS( zev ) |
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126 | zfm_vj = zev - ABS( zev ) |
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127 | ztu(ji,jj,jk) = zfp_ui * trb(ji,jj,jk,jn) + zfm_ui * trb(ji+1,jj ,jk,jn) |
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128 | ztv(ji,jj,jk) = zfp_vj * trb(ji,jj,jk,jn) + zfm_vj * trb(ji ,jj+1,jk,jn) |
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129 | END DO |
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130 | END DO |
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131 | END DO |
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132 | |
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133 | ! upstream tracer flux in the k direction |
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134 | ! Surface value |
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135 | IF( lk_dynspg_fsc .OR. lk_dynspg_fsc_tsk ) THEN ! free surface-constant volume |
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136 | DO jj = 1, jpj |
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137 | DO ji = 1, jpi |
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138 | zew = e1t(ji,jj) * e2t(ji,jj) * zwn(ji,jj,1) |
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139 | ztw(ji,jj,1) = zew * trb(ji,jj,1,jn) |
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140 | END DO |
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141 | END DO |
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142 | ELSE ! rigid lid : flux set to zero |
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143 | ztw(:,:,1) = 0.e0 |
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144 | ENDIF |
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145 | |
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146 | ! Interior value |
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147 | DO jk = 2, jpkm1 |
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148 | DO jj = 1, jpj |
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149 | DO ji = 1, jpi |
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150 | zew = 0.5 * e1t(ji,jj) * e2t(ji,jj) * zwn(ji,jj,jk) |
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151 | zfp_wk = zew + ABS( zew ) |
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152 | zfm_wk = zew - ABS( zew ) |
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153 | ztw(ji,jj,jk) = zfp_wk * trb(ji,jj,jk,jn) + zfm_wk * trb(ji,jj,jk-1,jn) |
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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 | ! total advective trend |
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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 | zbtr = 1./ ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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163 | zti(ji,jj,jk) = - ( ztu(ji,jj,jk) - ztu(ji-1,jj ,jk ) & |
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164 | & + ztv(ji,jj,jk) - ztv(ji ,jj-1,jk ) & |
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165 | & + ztw(ji,jj,jk) - ztw(ji ,jj ,jk+1) ) * zbtr |
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166 | END DO |
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167 | END DO |
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168 | END DO |
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169 | |
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170 | |
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171 | ! update and guess with monotonic sheme |
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172 | DO jk = 1, jpkm1 |
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173 | z2dtt = z2 * rdttra(jk) * FLOAT(ndttrc) |
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174 | DO jj = 2, jpjm1 |
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175 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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176 | tra(ji,jj,jk,jn) = tra(ji,jj,jk,jn) + zti(ji,jj,jk) |
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177 | zti (ji,jj,jk) = ( trb(ji,jj,jk,jn) + z2dtt * zti(ji,jj,jk) ) * tmask(ji,jj,jk) |
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178 | END DO |
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179 | END DO |
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180 | END DO |
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181 | |
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182 | ! Lateral boundary conditions on zti, zsi (unchanged sign) |
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183 | CALL lbc_lnk( zti, 'T', 1. ) |
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184 | |
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185 | ! 3. antidiffusive flux : high order minus low order |
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186 | ! -------------------------------------------------- |
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187 | ! antidiffusive flux on i and j |
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188 | DO jk = 1, jpkm1 |
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189 | DO jj = 1, jpjm1 |
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190 | DO ji = 1, fs_jpim1 ! vector opt. |
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191 | zeu = 0.5 * e2u(ji,jj) * fse3u(ji,jj,jk) * zun(ji,jj,jk) |
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192 | zev = 0.5 * e1v(ji,jj) * fse3v(ji,jj,jk) * zvn(ji,jj,jk) |
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193 | ztu(ji,jj,jk) = zeu * ( trn(ji,jj,jk,jn) + trn(ji+1,jj,jk,jn) ) - ztu(ji,jj,jk) |
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194 | ztv(ji,jj,jk) = zev * ( trn(ji,jj,jk,jn) + trn(ji,jj+1,jk,jn) ) - ztv(ji,jj,jk) |
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195 | END DO |
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196 | END DO |
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197 | END DO |
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198 | |
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199 | ! antidiffusive flux on k |
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200 | ! Surface value |
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201 | ztw(:,:,1) = 0. |
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202 | |
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203 | ! Interior value |
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204 | DO jk = 2, jpkm1 |
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205 | DO jj = 1, jpj |
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206 | DO ji = 1, jpi |
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207 | zew = 0.5 * e1t(ji,jj) * e2t(ji,jj) * zwn(ji,jj,jk) |
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208 | ztw(ji,jj,jk) = zew * ( trn(ji,jj,jk,jn) + trn(ji,jj,jk-1,jn) ) - ztw(ji,jj,jk) |
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209 | END DO |
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210 | END DO |
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211 | END DO |
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212 | |
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213 | ! Lateral bondary conditions |
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214 | CALL lbc_lnk( ztu, 'U', -1. ) |
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215 | CALL lbc_lnk( ztv, 'V', -1. ) |
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216 | CALL lbc_lnk( ztw, 'W', 1. ) |
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217 | |
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218 | ! 4. monotonicity algorithm |
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219 | ! ------------------------- |
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220 | CALL nonosc( trb, ztu, ztv, ztw, zti, z2 ) |
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221 | |
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222 | |
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223 | ! 5. final trend with corrected fluxes |
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224 | ! ------------------------------------ |
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225 | DO jk = 1, jpkm1 |
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226 | DO jj = 2, jpjm1 |
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227 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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228 | zbtr = 1. / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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229 | tra(ji,jj,jk,jn) = tra(ji,jj,jk,jn) & |
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230 | & - ( ztu(ji,jj,jk) - ztu(ji-1,jj ,jk ) & |
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231 | & + ztv(ji,jj,jk) - ztv(ji ,jj-1,jk ) & |
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232 | & + ztw(ji,jj,jk) - ztw(ji ,jj ,jk+1) ) * zbtr |
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233 | END DO |
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234 | END DO |
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235 | END DO |
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236 | |
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237 | END DO |
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238 | |
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239 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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240 | WRITE(charout, FMT="('tvd - adv')") |
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241 | CALL prt_ctl_trc_info(charout) |
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242 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm,clinfo2='trd') |
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243 | ENDIF |
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244 | |
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245 | END SUBROUTINE trc_adv_tvd |
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246 | |
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247 | |
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248 | SUBROUTINE nonosc( pbef, paa, pbb, pcc, paft, prdt ) |
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249 | !!--------------------------------------------------------------------- |
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250 | !! *** ROUTINE nonosc *** |
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251 | !! |
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252 | !! ** Purpose : compute monotonic tracer fluxes from the upstream |
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253 | !! scheme and the before field by a nonoscillatory algorithm |
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254 | !! |
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255 | !! ** Method : ... ??? |
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256 | !! warning : pbef and paft must be masked, but the boundaries |
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257 | !! conditions on the fluxes are not necessary zalezak (1979) |
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258 | !! drange (1995) multi-dimensional forward-in-time and upstream- |
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259 | !! in-space based differencing for fluid |
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260 | !! |
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261 | !! History : |
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262 | !! ! 97-04 (L. Mortier) Original code |
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263 | !! ! 00-02 (H. Loukos) rewritting for opa8 |
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264 | !! ! 00-10 (M.A Foujols, E. Kestenare) lateral b.c. |
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265 | !! ! 01-03 (E. Kestenare) add key_passivetrc |
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266 | !! ! 01-07 (E. Durand G. Madec) adapted for T & S |
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267 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
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268 | !!---------------------------------------------------------------------- |
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269 | !! * Arguments |
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270 | REAL(wp), INTENT( in ) :: & |
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271 | prdt ! ??? |
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272 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT( inout ) :: & |
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273 | pbef, & ! before field |
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274 | paft, & ! after field |
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275 | paa, & ! monotonic flux in the i direction |
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276 | pbb, & ! monotonic flux in the j direction |
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277 | pcc ! monotonic flux in the k direction |
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278 | |
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279 | !! * Local declarations |
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280 | INTEGER :: ji, jj, jk ! dummy loop indices |
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281 | INTEGER :: ikm1 |
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282 | REAL(wp), DIMENSION (jpi,jpj,jpk) :: zbetup, zbetdo |
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283 | REAL(wp) :: zpos, zneg, zbt, za, zb, zc, zbig, zrtrn, z2dtt |
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284 | !!---------------------------------------------------------------------- |
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285 | |
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286 | zbig = 1.e+40 |
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287 | zrtrn = 1.e-15 |
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288 | |
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289 | ! Search local extrema |
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290 | ! -------------------- |
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291 | ! large negative value (-zbig) inside land |
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292 | ! large negative value (-zbig) inside land |
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293 | pbef(:,:,:) = pbef(:,:,:) * tmask(:,:,:) - zbig * ( 1.e0 - tmask(:,:,:) ) |
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294 | paft(:,:,:) = paft(:,:,:) * tmask(:,:,:) - zbig * ( 1.e0 - tmask(:,:,:) ) |
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295 | ! search maximum in neighbourhood |
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296 | DO jk = 1, jpkm1 |
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297 | ikm1 = MAX(jk-1,1) |
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298 | DO jj = 2, jpjm1 |
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299 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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300 | zbetup(ji,jj,jk) = MAX( pbef(ji ,jj ,jk ), paft(ji ,jj ,jk ), & |
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301 | & pbef(ji-1,jj ,jk ), pbef(ji+1,jj ,jk ), & |
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302 | & paft(ji-1,jj ,jk ), paft(ji+1,jj ,jk ), & |
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303 | & pbef(ji ,jj-1,jk ), pbef(ji ,jj+1,jk ), & |
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304 | & paft(ji ,jj-1,jk ), paft(ji ,jj+1,jk ), & |
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305 | & pbef(ji ,jj ,ikm1), pbef(ji ,jj ,jk+1), & |
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306 | & paft(ji ,jj ,ikm1), paft(ji ,jj ,jk+1) ) |
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307 | END DO |
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308 | END DO |
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309 | END DO |
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310 | ! large positive value (+zbig) inside land |
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311 | pbef(:,:,:) = pbef(:,:,:) * tmask(:,:,:) + zbig * ( 1.e0 - tmask(:,:,:) ) |
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312 | paft(:,:,:) = paft(:,:,:) * tmask(:,:,:) + zbig * ( 1.e0 - tmask(:,:,:) ) |
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313 | ! search minimum in neighbourhood |
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314 | DO jk = 1, jpkm1 |
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315 | ikm1 = MAX(jk-1,1) |
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316 | DO jj = 2, jpjm1 |
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317 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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318 | zbetdo(ji,jj,jk) = MIN( pbef(ji ,jj ,jk ), paft(ji ,jj ,jk ), & |
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319 | & pbef(ji-1,jj ,jk ), pbef(ji+1,jj ,jk ), & |
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320 | & paft(ji-1,jj ,jk ), paft(ji+1,jj ,jk ), & |
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321 | & pbef(ji ,jj-1,jk ), pbef(ji ,jj+1,jk ), & |
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322 | & paft(ji ,jj-1,jk ), paft(ji ,jj+1,jk ), & |
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323 | & pbef(ji ,jj ,ikm1), pbef(ji ,jj ,jk+1), & |
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324 | & paft(ji ,jj ,ikm1), paft(ji ,jj ,jk+1) ) |
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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 | ! restore masked values to zero |
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330 | pbef(:,:,:) = pbef(:,:,:) * tmask(:,:,:) |
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331 | paft(:,:,:) = paft(:,:,:) * tmask(:,:,:) |
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332 | |
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333 | |
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334 | ! 2. Positive and negative part of fluxes and beta terms |
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335 | ! ------------------------------------------------------ |
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336 | |
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337 | DO jk = 1, jpkm1 |
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338 | z2dtt = prdt * rdttra(jk) * FLOAT(ndttrc) |
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339 | DO jj = 2, jpjm1 |
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340 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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341 | ! positive & negative part of the flux |
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342 | zpos = MAX( 0., paa(ji-1,jj ,jk ) ) - MIN( 0., paa(ji ,jj ,jk ) ) & |
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343 | & + MAX( 0., pbb(ji ,jj-1,jk ) ) - MIN( 0., pbb(ji ,jj ,jk ) ) & |
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344 | & + MAX( 0., pcc(ji ,jj ,jk+1) ) - MIN( 0., pcc(ji ,jj ,jk ) ) |
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345 | zneg = MAX( 0., paa(ji ,jj ,jk ) ) - MIN( 0., paa(ji-1,jj ,jk ) ) & |
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346 | & + MAX( 0., pbb(ji ,jj ,jk ) ) - MIN( 0., pbb(ji ,jj-1,jk ) ) & |
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347 | & + MAX( 0., pcc(ji ,jj ,jk ) ) - MIN( 0., pcc(ji ,jj ,jk+1) ) |
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348 | ! up & down beta terms |
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349 | zbt = e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) / z2dtt |
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350 | zbetup(ji,jj,jk) = ( zbetup(ji,jj,jk) - paft(ji,jj,jk) ) / (zpos+zrtrn) * zbt |
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351 | zbetdo(ji,jj,jk) = ( paft(ji,jj,jk) - zbetdo(ji,jj,jk) ) / (zneg+zrtrn) * zbt |
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352 | END DO |
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353 | END DO |
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354 | END DO |
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355 | |
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356 | ! lateral boundary condition on zbetup & zbetdo (unchanged sign) |
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357 | CALL lbc_lnk( zbetup, 'T', 1. ) |
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358 | CALL lbc_lnk( zbetdo, 'T', 1. ) |
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359 | |
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360 | |
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361 | ! 3. monotonic flux in the i direction, i.e. paa |
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362 | ! ---------------------------------------------- |
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363 | DO jk = 1, jpkm1 |
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364 | DO jj = 2, jpjm1 |
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365 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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366 | zc = paa(ji,jj,jk) |
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367 | IF( zc >= 0. ) THEN |
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368 | za = MIN( 1., zbetdo(ji,jj,jk), zbetup(ji+1,jj,jk) ) |
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369 | paa(ji,jj,jk) = za * zc |
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370 | ELSE |
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371 | zb = MIN( 1., zbetup(ji,jj,jk), zbetdo(ji+1,jj,jk) ) |
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372 | paa(ji,jj,jk) = zb * zc |
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373 | ENDIF |
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374 | END DO |
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375 | END DO |
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376 | END DO |
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377 | |
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378 | ! lateral boundary condition on paa (changed sign) |
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379 | CALL lbc_lnk( paa, 'U', -1. ) |
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380 | |
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381 | |
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382 | ! 4. monotonic flux in the j direction, i.e. pbb |
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383 | ! ---------------------------------------------- |
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384 | DO jk = 1, jpkm1 |
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385 | DO jj = 2, jpjm1 |
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386 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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387 | zc = pbb(ji,jj,jk) |
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388 | IF( zc >= 0. ) THEN |
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389 | za = MIN( 1., zbetdo(ji,jj,jk), zbetup(ji,jj+1,jk) ) |
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390 | pbb(ji,jj,jk) = za * zc |
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391 | ELSE |
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392 | zb = MIN( 1., zbetup(ji,jj,jk), zbetdo(ji,jj+1,jk) ) |
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393 | pbb(ji,jj,jk) = zb * zc |
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394 | ENDIF |
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395 | END DO |
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396 | END DO |
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397 | END DO |
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398 | |
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399 | ! lateral boundary condition on pbb (changed sign) |
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400 | CALL lbc_lnk( pbb, 'V', -1. ) |
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401 | |
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402 | |
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403 | ! monotonic flux in the k direction, i.e. pcc |
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404 | ! ------------------------------------------- |
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405 | DO jk = 2, jpkm1 |
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406 | DO jj = 2, jpjm1 |
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407 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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408 | zc = pcc(ji,jj,jk) |
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409 | IF( zc >= 0. ) THEN |
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410 | za = MIN( 1., zbetdo(ji,jj,jk), zbetup(ji,jj,jk-1) ) |
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411 | pcc(ji,jj,jk) = za * zc |
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412 | ELSE |
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413 | zb = MIN( 1., zbetup(ji,jj,jk), zbetdo(ji,jj,jk-1) ) |
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414 | pcc(ji,jj,jk) = zb * zc |
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415 | ENDIF |
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416 | END DO |
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417 | END DO |
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418 | END DO |
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419 | |
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420 | ! lateral boundary condition on pcc (unchanged sign) |
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421 | CALL lbc_lnk( pcc, 'W', 1. ) |
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422 | |
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423 | END SUBROUTINE nonosc |
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424 | |
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425 | #else |
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426 | !!---------------------------------------------------------------------- |
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427 | !! Default option Empty module |
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428 | !!---------------------------------------------------------------------- |
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429 | CONTAINS |
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430 | SUBROUTINE trc_adv_tvd( kt ) |
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431 | INTEGER, INTENT(in) :: kt |
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432 | WRITE(*,*) 'trc_adv_tvd: You should not have seen this print! error?', kt |
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433 | END SUBROUTINE trc_adv_tvd |
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434 | #endif |
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435 | |
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436 | !!====================================================================== |
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437 | END MODULE trcadv_tvd |
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