1 | MODULE trcrad |
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2 | !!====================================================================== |
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3 | !! *** MODULE trcrad *** |
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4 | !! Ocean passive tracers: correction of negative concentrations |
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5 | !!====================================================================== |
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6 | !! History : - ! 01-01 (O. Aumont & E. Kestenare) Original code |
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7 | !! 1.0 ! 04-03 (C. Ethe) free form F90 |
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8 | !!---------------------------------------------------------------------- |
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9 | #if defined key_top |
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10 | !!---------------------------------------------------------------------- |
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11 | !! 'key_top' TOP models |
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12 | !!---------------------------------------------------------------------- |
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13 | !! trc_rad : correction of negative concentrations |
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14 | !!---------------------------------------------------------------------- |
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15 | USE oce_trc ! ocean dynamics and tracers variables |
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16 | USE trc ! ocean passive tracers variables |
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17 | USE trd_oce |
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18 | USE trdtra |
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19 | USE prtctl_trc ! Print control for debbuging |
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20 | |
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21 | IMPLICIT NONE |
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22 | PRIVATE |
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23 | |
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24 | PUBLIC trc_rad ! routine called by trcstp.F90 |
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25 | |
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26 | !! * Substitutions |
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27 | # include "top_substitute.h90" |
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28 | !!---------------------------------------------------------------------- |
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29 | !! NEMO/TOP 3.3 , NEMO Consortium (2010) |
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30 | !! $Id$ |
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31 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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32 | !!---------------------------------------------------------------------- |
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33 | |
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34 | CONTAINS |
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35 | |
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36 | SUBROUTINE trc_rad( kt ) |
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37 | !!---------------------------------------------------------------------- |
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38 | !! *** ROUTINE trc_rad *** |
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39 | !! |
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40 | !! ** Purpose : "crappy" routine to correct artificial negative |
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41 | !! concentrations due to isopycnal scheme |
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42 | !! |
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43 | !! ** Method : - PISCES or LOBSTER: Set negative concentrations to zero |
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44 | !! while computing the corresponding tracer content that |
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45 | !! is added to the tracers. Then, adjust the tracer |
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46 | !! concentration using a multiplicative factor so that |
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47 | !! the total tracer concentration is preserved. |
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48 | !! - CFC: simply set to zero the negative CFC concentration |
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49 | !! (the total CFC content is not strictly preserved) |
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50 | !!---------------------------------------------------------------------- |
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51 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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52 | CHARACTER (len=22) :: charout |
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53 | !!---------------------------------------------------------------------- |
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54 | ! |
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55 | IF( nn_timing == 1 ) CALL timing_start('trc_rad') |
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56 | ! |
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57 | IF( kt == nittrc000 ) THEN |
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58 | IF(lwp) WRITE(numout,*) |
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59 | IF(lwp) WRITE(numout,*) 'trc_rad : Correct artificial negative concentrations ' |
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60 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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61 | ENDIF |
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62 | |
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63 | IF( lk_cfc ) CALL trc_rad_sms( kt, trb, trn, jp_cfc0 , jp_cfc1 ) ! CFC model |
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64 | IF( lk_c14b ) CALL trc_rad_sms( kt, trb, trn, jp_c14b0, jp_c14b1 ) ! bomb C14 |
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65 | IF( lk_pisces ) CALL trc_rad_sms( kt, trb, trn, jp_pcs0 , jp_pcs1, cpreserv='Y' ) ! PISCES model |
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66 | IF( lk_my_trc ) CALL trc_rad_sms( kt, trb, trn, jp_myt0 , jp_myt1 ) ! MY_TRC model |
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67 | |
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68 | ! |
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69 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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70 | WRITE(charout, FMT="('rad')") |
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71 | CALL prt_ctl_trc_info( charout ) |
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72 | CALL prt_ctl_trc( tab4d=trn, mask=tmask, clinfo=ctrcnm ) |
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73 | ENDIF |
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74 | ! |
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75 | IF( nn_timing == 1 ) CALL timing_stop('trc_rad') |
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76 | ! |
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77 | END SUBROUTINE trc_rad |
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78 | |
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79 | SUBROUTINE trc_rad_sms( kt, ptrb, ptrn, jp_sms0, jp_sms1, cpreserv ) |
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80 | !!----------------------------------------------------------------------------- |
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81 | !! *** ROUTINE trc_rad_sms *** |
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82 | !! |
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83 | !! ** Purpose : "crappy" routine to correct artificial negative |
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84 | !! concentrations due to isopycnal scheme |
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85 | !! |
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86 | !! ** Method : 2 cases : |
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87 | !! - Set negative concentrations to zero while computing |
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88 | !! the corresponding tracer content that is added to the |
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89 | !! tracers. Then, adjust the tracer concentration using |
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90 | !! a multiplicative factor so that the total tracer |
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91 | !! concentration is preserved. |
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92 | !! - simply set to zero the negative CFC concentration |
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93 | !! (the total content of concentration is not strictly preserved) |
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94 | !!-------------------------------------------------------------------------------- |
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95 | !! Arguments |
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96 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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97 | INTEGER , INTENT( in ) :: & |
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98 | jp_sms0, & !: First index of the passive tracer model |
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99 | jp_sms1 !: Last index of the passive tracer model |
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100 | |
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101 | REAL(wp), DIMENSION (jpi,jpj,jpk,jptra), INTENT( inout ) :: & |
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102 | ptrb, ptrn !: before and now traceur concentration |
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103 | |
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104 | CHARACTER( len = 1) , INTENT(in), OPTIONAL :: & |
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105 | cpreserv !: flag to preserve content or not |
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106 | |
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107 | ! Local declarations |
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108 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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109 | REAL(wp) :: ztrcorb, ztrmasb ! temporary scalars |
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110 | REAL(wp) :: zcoef, ztrcorn, ztrmasn ! " " |
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111 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrtrdb, ztrtrdn ! workspace arrays |
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112 | REAL(wp) :: zs2rdt |
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113 | LOGICAL :: lldebug = .FALSE. |
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114 | !!---------------------------------------------------------------------- |
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115 | |
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116 | |
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117 | IF( l_trdtrc ) CALL wrk_alloc( jpi, jpj, jpk, ztrtrdb, ztrtrdn ) |
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118 | |
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119 | IF( PRESENT( cpreserv ) ) THEN ! total tracer concentration is preserved |
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120 | |
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121 | DO jn = jp_sms0, jp_sms1 |
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122 | ! ! =========== |
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123 | ztrcorb = 0.e0 ; ztrmasb = 0.e0 |
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124 | ztrcorn = 0.e0 ; ztrmasn = 0.e0 |
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125 | |
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126 | IF( l_trdtrc ) THEN |
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127 | ztrtrdb(:,:,:) = ptrb(:,:,:,jn) ! save input trb for trend computation |
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128 | ztrtrdn(:,:,:) = ptrn(:,:,:,jn) ! save input trn for trend computation |
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129 | ENDIF |
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130 | ! ! sum over the global domain |
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131 | ztrcorb = glob_sum( MIN( 0., ptrb(:,:,:,jn) ) * cvol(:,:,:) ) |
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132 | ztrcorn = glob_sum( MIN( 0., ptrn(:,:,:,jn) ) * cvol(:,:,:) ) |
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133 | |
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134 | ztrmasb = glob_sum( MAX( 0., ptrb(:,:,:,jn) ) * cvol(:,:,:) ) |
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135 | ztrmasn = glob_sum( MAX( 0., ptrn(:,:,:,jn) ) * cvol(:,:,:) ) |
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136 | |
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137 | IF( ztrcorb /= 0 ) THEN |
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138 | zcoef = 1. + ztrcorb / ztrmasb |
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139 | DO jk = 1, jpkm1 |
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140 | ptrb(:,:,jk,jn) = MAX( 0., ptrb(:,:,jk,jn) ) |
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141 | ptrb(:,:,jk,jn) = ptrb(:,:,jk,jn) * zcoef * tmask(:,:,jk) |
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142 | END DO |
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143 | ENDIF |
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144 | |
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145 | IF( ztrcorn /= 0 ) THEN |
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146 | zcoef = 1. + ztrcorn / ztrmasn |
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147 | DO jk = 1, jpkm1 |
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148 | ptrn(:,:,jk,jn) = MAX( 0., ptrn(:,:,jk,jn) ) |
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149 | ptrn(:,:,jk,jn) = ptrn(:,:,jk,jn) * zcoef * tmask(:,:,jk) |
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150 | END DO |
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151 | ENDIF |
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152 | ! |
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153 | IF( l_trdtrc ) THEN |
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154 | ! |
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155 | zs2rdt = 1. / ( 2. * rdt ) |
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156 | ztrtrdb(:,:,:) = ( ptrb(:,:,:,jn) - ztrtrdb(:,:,:) ) * zs2rdt |
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157 | ztrtrdn(:,:,:) = ( ptrn(:,:,:,jn) - ztrtrdn(:,:,:) ) * zs2rdt |
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158 | CALL trd_tra( kt, 'TRC', jn, jptra_radb, ztrtrdb ) ! Asselin-like trend handling |
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159 | CALL trd_tra( kt, 'TRC', jn, jptra_radn, ztrtrdn ) ! standard trend handling |
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160 | ! |
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161 | ENDIF |
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162 | |
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163 | END DO |
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164 | ! |
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165 | ! |
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166 | ELSE ! total CFC content is not strictly preserved |
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167 | |
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168 | DO jn = jp_sms0, jp_sms1 |
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169 | |
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170 | IF( l_trdtrc ) THEN |
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171 | ztrtrdb(:,:,:) = ptrb(:,:,:,jn) ! save input trb for trend computation |
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172 | ztrtrdn(:,:,:) = ptrn(:,:,:,jn) ! save input trn for trend computation |
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173 | ENDIF |
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174 | |
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175 | DO jk = 1, jpkm1 |
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176 | DO jj = 1, jpj |
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177 | DO ji = 1, jpi |
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178 | ptrn(ji,jj,jk,jn) = MAX( 0. , ptrn(ji,jj,jk,jn) ) |
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179 | ptrb(ji,jj,jk,jn) = MAX( 0. , ptrb(ji,jj,jk,jn) ) |
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180 | END DO |
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181 | END DO |
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182 | END DO |
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183 | |
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184 | IF( l_trdtrc ) THEN |
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185 | ! |
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186 | zs2rdt = 1. / ( 2. * rdt * FLOAT( nn_dttrc ) ) |
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187 | ztrtrdb(:,:,:) = ( ptrb(:,:,:,jn) - ztrtrdb(:,:,:) ) * zs2rdt |
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188 | ztrtrdn(:,:,:) = ( ptrn(:,:,:,jn) - ztrtrdn(:,:,:) ) * zs2rdt |
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189 | CALL trd_tra( kt, 'TRC', jn, jptra_radb, ztrtrdb ) ! Asselin-like trend handling |
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190 | CALL trd_tra( kt, 'TRC', jn, jptra_radn, ztrtrdn ) ! standard trend handling |
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191 | ! |
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192 | ENDIF |
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193 | ! |
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194 | ENDDO |
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195 | |
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196 | ENDIF |
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197 | |
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198 | IF( l_trdtrc ) CALL wrk_dealloc( jpi, jpj, jpk, ztrtrdb, ztrtrdn ) |
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199 | |
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200 | END SUBROUTINE trc_rad_sms |
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201 | #else |
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202 | !!---------------------------------------------------------------------- |
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203 | !! Dummy module : NO TOP model |
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204 | !!---------------------------------------------------------------------- |
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205 | CONTAINS |
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206 | SUBROUTINE trc_rad( kt ) ! Empty routine |
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207 | INTEGER, INTENT(in) :: kt |
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208 | WRITE(*,*) 'trc_rad: You should not have seen this print! error?', kt |
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209 | END SUBROUTINE trc_rad |
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210 | #endif |
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211 | |
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212 | !!====================================================================== |
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213 | END MODULE trcrad |
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