1 | MODULE tranpc |
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2 | !!============================================================================== |
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3 | !! *** MODULE tranpc *** |
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4 | !! Ocean active tracers: non penetrative convection scheme |
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5 | !!============================================================================== |
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6 | !! History : 1.0 ! 90-09 (G. Madec) Original code |
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7 | !! ! 91-11 (G. Madec) |
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8 | !! ! 92-06 (M. Imbard) periodic conditions on t and s |
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9 | !! ! 93-03 (M. Guyon) symetrical conditions |
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10 | !! ! 96-01 (G. Madec) statement function for e3 |
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11 | !! suppression of common work arrays |
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12 | !! 8.5 ! 02-06 (G. Madec) free form F90 |
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13 | !!---------------------------------------------------------------------- |
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14 | |
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15 | !!---------------------------------------------------------------------- |
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16 | !! tra_npc : apply the non penetrative convection scheme |
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17 | !! tra_npc_init : initialization and control of the scheme |
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18 | !!---------------------------------------------------------------------- |
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19 | USE oce ! ocean dynamics and active tracers |
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20 | USE dom_oce ! ocean space and time domain |
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21 | USE trdmod ! ocean active tracer trends |
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22 | USE trdmod_oce ! ocean variables trends |
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23 | USE eosbn2 ! equation of state (eos routine) |
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24 | USE lbclnk ! lateral boundary conditions (or mpp link) |
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25 | USE in_out_manager ! I/O manager |
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26 | |
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27 | IMPLICIT NONE |
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28 | PRIVATE |
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29 | |
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30 | PUBLIC tra_npc ! routine called by step.F90 |
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31 | |
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32 | !!* Namelist namnpc: non penetrative convection algorithm |
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33 | INTEGER :: nnpc1 = 1 ! nnpc1 non penetrative convective scheme frequency |
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34 | INTEGER :: nnpc2 = 15 ! nnpc2 non penetrative convective scheme print frequency |
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35 | NAMELIST/namnpc/ nnpc1, nnpc2 |
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36 | |
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37 | !! * Substitutions |
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38 | # include "domzgr_substitute.h90" |
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39 | !!---------------------------------------------------------------------- |
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40 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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41 | !! $Header$ |
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42 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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43 | !!---------------------------------------------------------------------- |
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44 | |
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45 | CONTAINS |
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46 | |
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47 | SUBROUTINE tra_npc( kt ) |
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48 | !!---------------------------------------------------------------------- |
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49 | !! *** ROUTINE tranpc *** |
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50 | !! |
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51 | !! ** Purpose : Non penetrative convective adjustment scheme. solve |
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52 | !! the static instability of the water column (now, after the swap) |
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53 | !! while conserving heat and salt contents. |
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54 | !! |
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55 | !! ** Method : The algorithm used converges in a maximium of jpk |
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56 | !! iterations. instabilities are treated when the vertical density |
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57 | !! gradient is less than 1.e-5. |
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58 | !! l_trdtra=T: the trend associated with this algorithm is saved. |
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59 | !! |
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60 | !! ** Action : - (tn,sn) after the application od the npc scheme |
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61 | !! - save the associated trends (ttrd,strd) ('key_trdtra') |
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62 | !! |
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63 | !! References : Madec, et al., 1991, JPO, 21, 9, 1349-1371. |
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64 | !!---------------------------------------------------------------------- |
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65 | USE oce, ONLY : ztrdt => ua ! use ua as 3D workspace |
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66 | USE oce, ONLY : ztrds => va ! use va as 3D workspace |
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67 | !! |
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68 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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69 | !! |
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70 | INTEGER :: ji, jj, jk ! dummy loop indices |
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71 | INTEGER :: inpcc ! number of statically instable water column |
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72 | INTEGER :: inpci ! number of iteration for npc scheme |
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73 | INTEGER :: jiter, jkdown, jkp ! ??? |
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74 | INTEGER :: ikbot, ik, ikup, ikdown ! ??? |
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75 | REAL(wp) :: ze3tot, zta, zsa, zraua, ze3dwn |
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76 | REAL(wp), DIMENSION(jpi,jpk) :: zwx, zwy, zwz ! 2D arrays |
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77 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zrhop ! 3D arrays |
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78 | !!---------------------------------------------------------------------- |
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79 | |
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80 | IF( kt == nit000 ) CALL tra_npc_init ! Initialisation |
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81 | |
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82 | IF( MOD( kt, nnpc1 ) == 0 ) THEN |
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83 | |
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84 | inpcc = 0 |
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85 | inpci = 0 |
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86 | |
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87 | CALL eos( tn, sn, rhd, zrhop ) ! Potential density |
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88 | |
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89 | |
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90 | IF( l_trdtra ) THEN ! Save tn and sn trends |
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91 | ztrdt(:,:,:) = tn(:,:,:) |
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92 | ztrds(:,:,:) = sn(:,:,:) |
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93 | ENDIF |
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94 | |
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95 | ! ! =============== |
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96 | DO jj = 1, jpj ! Vertical slab |
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97 | ! ! =============== |
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98 | ! Static instability pointer |
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99 | ! ---------------------------- |
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100 | DO jk = 1, jpkm1 |
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101 | DO ji = 1, jpi |
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102 | zwx(ji,jk) = ( zrhop(ji,jj,jk) - zrhop(ji,jj,jk+1) ) * tmask(ji,jj,jk+1) |
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103 | END DO |
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104 | END DO |
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105 | |
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106 | ! 1.1 do not consider the boundary points |
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107 | |
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108 | ! even if east-west cyclic b. c. do not considere ji=1 or jpi |
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109 | DO jk = 1, jpkm1 |
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110 | zwx( 1 ,jk) = 0.e0 |
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111 | zwx(jpi,jk) = 0.e0 |
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112 | END DO |
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113 | ! even if south-symmetric b. c. used, do not considere jj=1 |
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114 | IF( jj == 1 ) zwx(:,:) = 0.e0 |
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115 | |
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116 | DO jk = 1, jpkm1 |
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117 | DO ji = 1, jpi |
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118 | zwx(ji,jk) = 1. |
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119 | IF( zwx(ji,jk) < 1.e-5 ) zwx(ji,jk) = 0.e0 |
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120 | END DO |
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121 | END DO |
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122 | |
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123 | zwy(:,1) = 0.e0 |
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124 | DO ji = 1, jpi |
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125 | DO jk = 1, jpkm1 |
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126 | zwy(ji,1) = zwy(ji,1) + zwx(ji,jk) |
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127 | END DO |
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128 | END DO |
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129 | |
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130 | zwz(1,1) = 0.e0 |
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131 | DO ji = 1, jpi |
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132 | zwz(1,1) = zwz(1,1) + zwy(ji,1) |
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133 | END DO |
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134 | |
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135 | inpcc = inpcc + NINT( zwz(1,1) ) |
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136 | |
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137 | |
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138 | ! 2. Vertical mixing for each instable portion of the density profil |
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139 | ! ------------------------------------------------------------------ |
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140 | |
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141 | IF( zwz(1,1) /= 0.e0 ) THEN ! -->> the density profil is statically instable : |
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142 | DO ji = 1, jpi |
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143 | IF( zwy(ji,1) /= 0.e0 ) THEN |
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144 | ! |
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145 | ikbot = mbathy(ji,jj) ! ikbot: ocean bottom level |
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146 | ! |
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147 | DO jiter = 1, jpk ! vertical iteration |
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148 | ! |
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149 | ! search of ikup : the first static instability from the sea surface |
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150 | ! |
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151 | ik = 0 |
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152 | 220 CONTINUE |
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153 | ik = ik + 1 |
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154 | IF( ik >= ikbot-1 ) GO TO 200 |
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155 | zwx(ji,ik) = zrhop(ji,jj,ik) - zrhop(ji,jj,ik+1) |
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156 | IF( zwx(ji,ik) <= 0.e0 ) GO TO 220 |
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157 | ikup = ik |
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158 | ! the density profil is instable below ikup |
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159 | ! ikdown : bottom of the instable portion of the density profil |
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160 | ! search of ikdown and vertical mixing from ikup to ikdown |
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161 | ! |
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162 | ze3tot= fse3t(ji,jj,ikup) |
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163 | zta = tn (ji,jj,ikup) |
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164 | zsa = sn (ji,jj,ikup) |
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165 | zraua = zrhop(ji,jj,ikup) |
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166 | ! |
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167 | DO jkdown = ikup+1, ikbot-1 |
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168 | IF( zraua <= zrhop(ji,jj,jkdown) ) THEN |
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169 | ikdown = jkdown |
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170 | GO TO 240 |
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171 | ENDIF |
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172 | ze3dwn = fse3t(ji,jj,jkdown) |
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173 | ze3tot = ze3tot + ze3dwn |
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174 | zta = ( zta*(ze3tot-ze3dwn) + tn(ji,jj,jkdown)*ze3dwn )/ze3tot |
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175 | zsa = ( zsa*(ze3tot-ze3dwn) + sn(ji,jj,jkdown)*ze3dwn )/ze3tot |
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176 | zraua = ( zraua*(ze3tot-ze3dwn) + zrhop(ji,jj,jkdown)*ze3dwn )/ze3tot |
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177 | inpci = inpci+1 |
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178 | END DO |
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179 | ikdown = ikbot-1 |
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180 | 240 CONTINUE |
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181 | ! |
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182 | DO jkp = ikup, ikdown-1 |
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183 | tn(ji,jj,jkp) = zta |
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184 | sn(ji,jj,jkp) = zsa |
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185 | zrhop(ji,jj,jkp) = zraua |
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186 | END DO |
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187 | IF (ikdown == ikbot-1 .AND. zraua >= zrhop(ji,jj,ikdown) ) THEN |
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188 | tn(ji,jj,ikdown) = zta |
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189 | sn(ji,jj,ikdown) = zsa |
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190 | zrhop(ji,jj,ikdown) = zraua |
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191 | ENDIF |
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192 | END DO |
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193 | ENDIF |
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194 | 200 CONTINUE |
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195 | END DO |
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196 | ! <<-- no more static instability on slab jj |
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197 | ENDIF |
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198 | ! ! =============== |
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199 | END DO ! End of slab |
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200 | ! ! =============== |
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201 | ! |
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202 | IF( l_trdtra ) THEN ! save the Non penetrative mixing trends for diagnostic |
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203 | ztrdt(:,:,:) = tn(:,:,:) - ztrdt(:,:,:) |
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204 | ztrds(:,:,:) = sn(:,:,:) - ztrds(:,:,:) |
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205 | CALL trd_mod(ztrdt, ztrds, jptra_trd_npc, 'TRA', kt) |
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206 | ENDIF |
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207 | |
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208 | ! Lateral boundary conditions on ( tn, sn ) ( Unchanged sign) |
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209 | ! ------------------------------============ |
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210 | CALL lbc_lnk( tn, 'T', 1. ) |
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211 | CALL lbc_lnk( sn, 'T', 1. ) |
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212 | |
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213 | |
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214 | ! 2. non penetrative convective scheme statistics |
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215 | ! ----------------------------------------------- |
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216 | IF( nnpc2 /= 0 .AND. MOD( kt, nnpc2 ) == 0 ) THEN |
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217 | IF(lwp) WRITE(numout,*)' kt=',kt, ' number of statically instable', & |
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218 | & ' water column : ',inpcc, ' number of iteration : ',inpci |
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219 | ENDIF |
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220 | ! |
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221 | ENDIF |
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222 | ! |
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223 | END SUBROUTINE tra_npc |
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224 | |
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225 | |
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226 | SUBROUTINE tra_npc_init |
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227 | !!---------------------------------------------------------------------- |
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228 | !! *** ROUTINE tra_npc_init *** |
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229 | !! |
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230 | !! ** Purpose : initializations of the non-penetrative adjustment scheme |
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231 | !!---------------------------------------------------------------------- |
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232 | ! |
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233 | REWIND( numnam ) ! Namelist namzdf : vertical diffusion |
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234 | READ ( numnam, namnpc ) |
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235 | ! |
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236 | IF(lwp) THEN ! Namelist print |
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237 | WRITE(numout,*) |
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238 | WRITE(numout,*) 'tra_npc_init : Non Penetrative Convection (npc) scheme' |
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239 | WRITE(numout,*) '~~~~~~~~~~~~' |
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240 | WRITE(numout,*) ' Namelist namnpc : set npc scheme parameters' |
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241 | WRITE(numout,*) ' npc scheme frequency nnpc1 = ', nnpc1 |
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242 | WRITE(numout,*) ' npc scheme print frequency nnpc2 = ', nnpc2 |
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243 | ENDIF |
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244 | ! |
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245 | IF ( nnpc1 == 0 ) THEN ! Parameter controls |
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246 | IF(lwp) WRITE(numout,cform_war) |
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247 | IF(lwp) WRITE(numout,*) ' nnpc1 = ', nnpc1, ' is forced to 1' |
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248 | nnpc1 = 1 |
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249 | nwarn = nwarn + 1 |
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250 | ENDIF |
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251 | ! |
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252 | END SUBROUTINE tra_npc_init |
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253 | |
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254 | !!====================================================================== |
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255 | END MODULE tranpc |
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