1 | MODULE zdfmxl |
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2 | !!====================================================================== |
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3 | !! *** MODULE zdfmxl *** |
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4 | !! Ocean physics: mixed layer depth |
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5 | !!====================================================================== |
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6 | !! History : 1.0 ! 2003-08 (G. Madec) original code |
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7 | !! 3.2 ! 2009-07 (S. Masson, G. Madec) IOM + merge of DO-loop |
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8 | !! 3.7 ! 2012-03 (G. Madec) make public the density criteria for trdmxl |
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9 | !! - ! 2014-02 (F. Roquet) mixed layer depth calculated using N2 instead of rhop |
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10 | !!---------------------------------------------------------------------- |
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11 | !! zdf_mxl : Compute the turbocline and mixed layer depths. |
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12 | !!---------------------------------------------------------------------- |
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13 | USE oce ! ocean dynamics and tracers variables |
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14 | USE isf_oce ! ice shelf |
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15 | USE dom_oce ! ocean space and time domain variables |
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16 | USE trc_oce , ONLY: l_offline ! ocean space and time domain variables |
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17 | USE zdf_oce ! ocean vertical physics |
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18 | ! |
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19 | USE in_out_manager ! I/O manager |
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20 | USE prtctl ! Print control |
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21 | USE phycst ! physical constants |
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22 | USE iom ! I/O library |
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23 | USE lib_mpp ! MPP library |
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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 zdf_mxl, zdf_mxl_turb, zdf_mxl_alloc ! called by zdfphy.F90 |
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29 | |
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30 | INTEGER , PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: nmln !: number of level in the mixed layer (used by LDF, ZDF, TRD, TOP) |
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31 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmld !: mixing layer depth (turbocline) [m] (used by TOP) |
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32 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlp !: mixed layer depth (rho=rho0+zdcrit) [m] (used by LDF) |
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33 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlpt !: depth of the last T-point inside the mixed layer [m] (used by LDF) |
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34 | |
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35 | REAL(wp), PUBLIC :: rho_c = 0.01_wp !: density criterion for mixed layer depth |
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36 | REAL(wp), PUBLIC :: avt_c = 5.e-4_wp ! Kz criterion for the turbocline depth |
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37 | |
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38 | !! * Substitutions |
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39 | # include "do_loop_substitute.h90" |
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40 | # include "domzgr_substitute.h90" |
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41 | !!---------------------------------------------------------------------- |
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42 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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43 | !! $Id$ |
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44 | !! Software governed by the CeCILL license (see ./LICENSE) |
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45 | !!---------------------------------------------------------------------- |
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46 | CONTAINS |
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47 | |
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48 | INTEGER FUNCTION zdf_mxl_alloc() |
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49 | !!---------------------------------------------------------------------- |
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50 | !! *** FUNCTION zdf_mxl_alloc *** |
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51 | !!---------------------------------------------------------------------- |
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52 | zdf_mxl_alloc = 0 ! set to zero if no array to be allocated |
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53 | IF( .NOT. ALLOCATED( nmln ) ) THEN |
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54 | ALLOCATE( nmln(jpi,jpj), hmld(jpi,jpj), hmlp(jpi,jpj), hmlpt(jpi,jpj), STAT= zdf_mxl_alloc ) |
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55 | ! |
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56 | CALL mpp_sum ( 'zdfmxl', zdf_mxl_alloc ) |
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57 | IF( zdf_mxl_alloc /= 0 ) CALL ctl_stop( 'STOP', 'zdf_mxl_alloc: failed to allocate arrays.' ) |
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58 | ! |
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59 | ENDIF |
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60 | END FUNCTION zdf_mxl_alloc |
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61 | |
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62 | |
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63 | SUBROUTINE zdf_mxl( kt, Kmm ) |
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64 | !!---------------------------------------------------------------------- |
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65 | !! *** ROUTINE zdfmxl *** |
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66 | !! |
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67 | !! ** Purpose : Compute the mixed layer depth with density criteria. |
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68 | !! |
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69 | !! ** Method : The mixed layer depth is the shallowest W depth with |
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70 | !! the density of the corresponding T point (just bellow) bellow a |
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71 | !! given value defined locally as rho(10m) + rho_c |
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72 | !! |
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73 | !! ** Action : nmln, hmlp, hmlpt |
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74 | !!---------------------------------------------------------------------- |
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75 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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76 | INTEGER, INTENT(in) :: Kmm ! ocean time level index |
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77 | ! |
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78 | INTEGER :: ji, jj, jk ! dummy loop indices |
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79 | INTEGER :: iik, ikt ! local integer |
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80 | REAL(wp) :: zN2_c ! local scalar |
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81 | !!---------------------------------------------------------------------- |
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82 | ! |
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83 | IF( .NOT. l_istiled .OR. ntile == 1 ) THEN ! Do only on the first tile |
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84 | IF( kt == nit000 ) THEN |
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85 | IF(lwp) WRITE(numout,*) |
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86 | IF(lwp) WRITE(numout,*) 'zdf_mxl : mixed layer depth' |
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87 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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88 | ENDIF |
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89 | ENDIF |
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90 | ! |
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91 | ! w-level of the mixing and mixed layers |
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92 | DO_2D_OVR( nn_hls, nn_hls, nn_hls, nn_hls ) |
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93 | nmln(ji,jj) = nlb10 ! Initialization to the number of w ocean point |
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94 | hmlp(ji,jj) = 0._wp ! here hmlp used as a dummy variable, integrating vertically N^2 |
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95 | END_2D |
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96 | zN2_c = grav * rho_c * r1_rho0 ! convert density criteria into N^2 criteria |
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97 | DO_3D_OVR( nn_hls, nn_hls, nn_hls, nn_hls, nlb10, jpkm1 ) ! Mixed layer level: w-level |
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98 | ikt = mbkt(ji,jj) |
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99 | hmlp(ji,jj) = & |
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100 | & hmlp(ji,jj) + MAX( rn2b(ji,jj,jk) , 0._wp ) * e3w(ji,jj,jk,Kmm) |
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101 | IF( hmlp(ji,jj) < zN2_c ) nmln(ji,jj) = MIN( jk , ikt ) + 1 ! Mixed layer level |
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102 | END_3D |
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103 | ! depth of the mixed layer |
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104 | DO_2D_OVR( nn_hls, nn_hls, nn_hls, nn_hls ) |
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105 | iik = nmln(ji,jj) |
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106 | hmlp (ji,jj) = gdepw(ji,jj,iik ,Kmm) * ssmask(ji,jj) ! Mixed layer depth |
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107 | hmlpt(ji,jj) = gdept(ji,jj,iik-1,Kmm) * ssmask(ji,jj) ! depth of the last T-point inside the mixed layer |
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108 | END_2D |
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109 | ! |
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110 | IF( .NOT.l_offline .AND. iom_use("mldr10_1") ) THEN |
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111 | IF( .NOT. l_istiled .OR. ntile == nijtile ) THEN ! Do only on the last tile |
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112 | IF( ln_isfcav ) THEN ; CALL iom_put( "mldr10_1", hmlp - risfdep) ! mixed layer thickness |
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113 | ELSE ; CALL iom_put( "mldr10_1", hmlp ) ! mixed layer depth |
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114 | END IF |
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115 | ENDIF |
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116 | ENDIF |
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117 | ! |
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118 | IF(sn_cfctl%l_prtctl) CALL prt_ctl( tab2d_1=REAL(nmln,wp), clinfo1=' nmln : ', tab2d_2=hmlp, clinfo2=' hmlp : ' ) |
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119 | ! |
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120 | END SUBROUTINE zdf_mxl |
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121 | |
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122 | |
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123 | SUBROUTINE zdf_mxl_turb( kt, Kmm ) |
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124 | !!---------------------------------------------------------------------- |
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125 | !! *** ROUTINE zdf_mxl_turb *** |
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126 | !! |
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127 | !! ** Purpose : Compute the turbocline depth. |
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128 | !! |
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129 | !! ** Method : The turbocline depth is the depth at which the vertical |
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130 | !! eddy diffusivity coefficient (resulting from the vertical physics |
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131 | !! alone, not the isopycnal part, see trazdf.F) fall below a given |
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132 | !! value defined locally (avt_c here taken equal to 5 cm/s2 by default) |
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133 | !! |
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134 | !! ** Action : hmld |
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135 | !!---------------------------------------------------------------------- |
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136 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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137 | INTEGER, INTENT(in) :: Kmm ! ocean time level index |
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138 | ! |
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139 | INTEGER :: ji, jj, jk ! dummy loop indices |
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140 | INTEGER :: iik ! local integer |
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141 | INTEGER, DIMENSION(A2D(nn_hls)) :: imld ! 2D workspace |
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142 | !!---------------------------------------------------------------------- |
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143 | ! |
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144 | ! w-level of the turbocline and mixing layer (iom_use) |
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145 | imld(:,:) = mbkt(A2D(nn_hls)) + 1 ! Initialization to the number of w ocean point |
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146 | DO_3DS( 1, 1, 1, 1, jpkm1, nlb10, -1 ) ! from the bottom to nlb10 |
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147 | IF( avt (ji,jj,jk) < avt_c * wmask(ji,jj,jk) ) imld(ji,jj) = jk ! Turbocline |
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148 | END_3D |
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149 | ! depth of the mixing layer |
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150 | DO_2D_OVR( 1, 1, 1, 1 ) |
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151 | iik = imld(ji,jj) |
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152 | hmld (ji,jj) = gdepw(ji,jj,iik ,Kmm) * ssmask(ji,jj) ! Turbocline depth |
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153 | END_2D |
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154 | ! |
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155 | IF( .NOT.l_offline .AND. iom_use("mldkz5") ) THEN |
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156 | IF( .NOT. l_istiled .OR. ntile == nijtile ) THEN ! Do only on the last tile |
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157 | IF( ln_isfcav ) THEN ; CALL iom_put( "mldkz5" , hmld - risfdep ) ! turbocline thickness |
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158 | ELSE ; CALL iom_put( "mldkz5" , hmld ) ! turbocline depth |
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159 | END IF |
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160 | ENDIF |
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161 | ENDIF |
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162 | ! |
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163 | END SUBROUTINE zdf_mxl_turb |
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164 | !!====================================================================== |
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165 | END MODULE zdfmxl |
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