1 | MODULE trczdf |
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2 | !!============================================================================== |
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3 | !! *** MODULE trczdf *** |
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4 | !! Ocean Passive tracers : vertical diffusive trends |
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5 | !!===================================================================== |
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6 | !! History : 9.0 ! 2005-11 (G. Madec) Original code |
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7 | !! NEMO 3.0 ! 2008-01 (C. Ethe, G. Madec) merge TRC-TRA |
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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_zdf : update the tracer trend with the lateral diffusion |
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14 | !! trc_zdf_ini : initialization, namelist read, and parameters control |
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15 | !!---------------------------------------------------------------------- |
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16 | USE trc ! ocean passive tracers variables |
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17 | USE oce_trc ! ocean dynamics and active tracers |
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18 | USE trd_oce ! trends: ocean variables |
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19 | USE trazdf_exp ! vertical diffusion: explicit (tra_zdf_exp routine) |
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20 | USE trazdf_imp ! vertical diffusion: implicit (tra_zdf_imp routine) |
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21 | USE trcldf ! passive tracers: lateral diffusion |
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22 | USE trdtra ! trends manager: tracers |
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23 | USE prtctl_trc ! Print control |
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24 | |
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25 | IMPLICIT NONE |
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26 | PRIVATE |
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27 | |
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28 | PUBLIC trc_zdf ! called by step.F90 |
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29 | PUBLIC trc_zdf_ini ! called by nemogcm.F90 |
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30 | PUBLIC trc_zdf_alloc ! called by nemogcm.F90 |
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31 | |
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32 | ! !!** Vertical diffusion (nam_trczdf) ** |
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33 | LOGICAL , PUBLIC :: ln_trczdf_exp !: explicit vertical diffusion scheme flag |
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34 | INTEGER , PUBLIC :: nn_trczdf_exp !: number of sub-time step (explicit time stepping) |
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35 | |
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36 | INTEGER :: nzdf = 0 ! type vertical diffusion algorithm used |
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37 | ! ! defined from ln_zdf... namlist logicals) |
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38 | REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:) :: r2dt ! vertical profile time-step, = 2 rdttra |
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39 | ! ! except at nittrc000 (=rdttra) if neuler=0 |
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40 | |
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41 | !! * Substitutions |
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42 | # include "domzgr_substitute.h90" |
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43 | # include "zdfddm_substitute.h90" |
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44 | # include "vectopt_loop_substitute.h90" |
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45 | !!---------------------------------------------------------------------- |
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46 | !! NEMO/TOP 3.7 , NEMO Consortium (2015) |
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47 | !! $Id$ |
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48 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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49 | !!---------------------------------------------------------------------- |
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50 | CONTAINS |
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51 | |
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52 | INTEGER FUNCTION trc_zdf_alloc() |
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53 | !!---------------------------------------------------------------------- |
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54 | !! *** ROUTINE trc_zdf_alloc *** |
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55 | !!---------------------------------------------------------------------- |
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56 | ALLOCATE( r2dt(jpk) , STAT=trc_zdf_alloc ) |
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57 | ! |
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58 | IF( trc_zdf_alloc /= 0 ) CALL ctl_warn('trc_zdf_alloc : failed to allocate array.') |
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59 | ! |
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60 | END FUNCTION trc_zdf_alloc |
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61 | |
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62 | |
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63 | SUBROUTINE trc_zdf( kt ) |
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64 | !!---------------------------------------------------------------------- |
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65 | !! *** ROUTINE trc_zdf *** |
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66 | !! |
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67 | !! ** Purpose : compute the vertical ocean tracer physics. |
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68 | !!--------------------------------------------------------------------- |
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69 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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70 | ! |
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71 | INTEGER :: jk, jn |
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72 | CHARACTER (len=22) :: charout |
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73 | REAL(wp), POINTER, DIMENSION(:,:,:,:) :: ztrtrd ! 4D workspace |
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74 | !!--------------------------------------------------------------------- |
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75 | ! |
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76 | IF( nn_timing == 1 ) CALL timing_start('trc_zdf') |
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77 | ! |
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78 | IF( ( neuler == 0 .AND. kt == nittrc000 ) .OR. ln_top_euler ) THEN ! at nittrc000 |
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79 | r2dt(:) = rdttrc(:) ! = rdttrc (use or restarting with Euler time stepping) |
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80 | ELSEIF( kt <= nittrc000 + nn_dttrc ) THEN ! at nittrc000 or nittrc000+1 |
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81 | r2dt(:) = 2. * rdttrc(:) ! = 2 rdttrc (leapfrog) |
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82 | ENDIF |
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83 | |
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84 | IF( l_trdtrc ) THEN |
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85 | CALL wrk_alloc( jpi, jpj, jpk, jptra, ztrtrd ) |
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86 | ztrtrd(:,:,:,:) = tra(:,:,:,:) |
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87 | ENDIF |
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88 | |
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89 | SELECT CASE ( nzdf ) ! compute lateral mixing trend and add it to the general trend |
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90 | CASE ( 0 ) ; CALL tra_zdf_exp( kt, nittrc000, 'TRC', r2dt, nn_trczdf_exp, trb, tra, jptra ) ! explicit scheme |
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91 | CASE ( 1 ) ; CALL tra_zdf_imp( kt, nittrc000, 'TRC', r2dt, trb, tra, jptra ) ! implicit scheme |
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92 | END SELECT |
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93 | |
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94 | IF( l_trdtrc ) THEN ! save the vertical diffusive trends for further diagnostics |
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95 | DO jn = 1, jptra |
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96 | DO jk = 1, jpkm1 |
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97 | ztrtrd(:,:,jk,jn) = ( ( tra(:,:,jk,jn) - trb(:,:,jk,jn) ) / r2dt(jk) ) - ztrtrd(:,:,jk,jn) |
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98 | END DO |
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99 | CALL trd_tra( kt, 'TRC', jn, jptra_zdf, ztrtrd(:,:,:,jn) ) |
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100 | END DO |
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101 | CALL wrk_dealloc( jpi, jpj, jpk, jptra, ztrtrd ) |
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102 | ENDIF |
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103 | ! ! print mean trends (used for debugging) |
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104 | IF( ln_ctl ) THEN |
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105 | WRITE(charout, FMT="('zdf ')") ; CALL prt_ctl_trc_info(charout) |
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106 | CALL prt_ctl_trc( tab4d=tra, mask=tmask, clinfo=ctrcnm, clinfo2='trd' ) |
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107 | END IF |
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108 | ! |
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109 | IF( nn_timing == 1 ) CALL timing_stop('trc_zdf') |
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110 | ! |
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111 | END SUBROUTINE trc_zdf |
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112 | |
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113 | |
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114 | SUBROUTINE trc_zdf_ini |
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115 | !!---------------------------------------------------------------------- |
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116 | !! *** ROUTINE trc_zdf_ini *** |
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117 | !! |
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118 | !! ** Purpose : Choose the vertical mixing scheme |
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119 | !! |
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120 | !! ** Method : Set nzdf from ln_zdfexp |
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121 | !! nzdf = 0 explicit (time-splitting) scheme (ln_trczdf_exp=T) |
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122 | !! = 1 implicit (euler backward) scheme (ln_trczdf_exp=F) |
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123 | !! NB: The implicit scheme is required when using : |
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124 | !! - rotated lateral mixing operator |
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125 | !! - TKE, GLS vertical mixing scheme |
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126 | !!---------------------------------------------------------------------- |
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127 | INTEGER :: ios ! Local integer output status for namelist read |
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128 | !! |
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129 | NAMELIST/namtrc_zdf/ ln_trczdf_exp , nn_trczdf_exp |
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130 | !!---------------------------------------------------------------------- |
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131 | ! |
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132 | REWIND( numnat_ref ) ! namtrc_zdf in reference namelist |
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133 | READ ( numnat_ref, namtrc_zdf, IOSTAT = ios, ERR = 905) |
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134 | 905 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namtrc_zdf in reference namelist', lwp ) |
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135 | ! |
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136 | REWIND( numnat_cfg ) ! namtrc_zdf in configuration namelist |
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137 | READ ( numnat_cfg, namtrc_zdf, IOSTAT = ios, ERR = 906 ) |
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138 | 906 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namtrc_zdf in configuration namelist', lwp ) |
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139 | IF(lwm) WRITE ( numont, namtrc_zdf ) |
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140 | ! |
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141 | IF(lwp) THEN ! Control print |
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142 | WRITE(numout,*) |
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143 | WRITE(numout,*) ' Namelist namtrc_zdf : set vertical diffusion parameters' |
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144 | WRITE(numout,*) ' time splitting / backward scheme ln_trczdf_exp = ', ln_trczdf_exp |
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145 | WRITE(numout,*) ' number of time step nn_trczdf_exp = ', nn_trczdf_exp |
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146 | ENDIF |
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147 | |
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148 | ! ! Define the vertical tracer physics scheme |
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149 | IF( ln_trczdf_exp ) THEN ; nzdf = 0 ! explicit scheme |
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150 | ELSE ; nzdf = 1 ! implicit scheme |
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151 | ENDIF |
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152 | |
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153 | ! ! Force implicit schemes |
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154 | IF( ln_trcldf_iso ) nzdf = 1 ! iso-neutral lateral physics |
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155 | IF( ln_trcldf_hor .AND. ln_sco ) nzdf = 1 ! horizontal lateral physics in s-coordinate |
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156 | #if defined key_zdftke || defined key_zdfgls |
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157 | nzdf = 1 ! TKE or GLS physics |
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158 | #endif |
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159 | IF( ln_trczdf_exp .AND. nzdf == 1 ) & |
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160 | CALL ctl_stop( 'trc_zdf : If using the rotated lateral mixing operator or TKE, GLS vertical scheme ', & |
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161 | & ' the implicit scheme is required, set ln_trczdf_exp = .false.' ) |
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162 | |
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163 | IF(lwp) THEN |
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164 | WRITE(numout,*) |
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165 | WRITE(numout,*) 'trc:zdf_ctl : vertical passive tracer physics scheme' |
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166 | WRITE(numout,*) '~~~~~~~~~~~' |
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167 | IF( nzdf == 0 ) WRITE(numout,*) ' Explicit time-splitting scheme' |
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168 | IF( nzdf == 1 ) WRITE(numout,*) ' Implicit (euler backward) scheme' |
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169 | ENDIF |
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170 | ! |
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171 | END SUBROUTINE trc_zdf_ini |
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172 | |
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173 | #else |
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174 | !!---------------------------------------------------------------------- |
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175 | !! Default option Empty module |
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176 | !!---------------------------------------------------------------------- |
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177 | CONTAINS |
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178 | SUBROUTINE trc_zdf( kt ) |
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179 | INTEGER, INTENT(in) :: kt |
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180 | WRITE(*,*) 'trc_zdf: You should not have seen this print! error?', kt |
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181 | END SUBROUTINE trc_zdf |
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182 | #endif |
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183 | !!============================================================================== |
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184 | END MODULE trczdf |
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