1 | !!---------------------------------------------------------------------- |
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2 | !! *** ldfdyn_c2d.h90 *** |
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3 | !!---------------------------------------------------------------------- |
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4 | !! ldf_dyn_c2d : set the lateral viscosity coefficients |
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5 | !! ldf_dyn_c2d_orca : specific case for orca r2 and r4 |
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6 | !!---------------------------------------------------------------------- |
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7 | |
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8 | !!---------------------------------------------------------------------- |
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9 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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10 | !! $Id$ |
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11 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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12 | !!---------------------------------------------------------------------- |
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13 | |
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14 | SUBROUTINE ldf_dyn_c2d( ld_print ) |
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15 | !!---------------------------------------------------------------------- |
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16 | !! *** ROUTINE ldf_dyn_c2d *** |
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17 | !! |
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18 | !! ** Purpose : initializations of the horizontal ocean physics |
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19 | !! |
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20 | !! ** Method : |
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21 | !! 2D eddy viscosity coefficients ( longitude, latitude ) |
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22 | !! |
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23 | !! harmonic operator : ahm1 is defined at t-point |
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24 | !! ahm2 is defined at f-point |
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25 | !! + isopycnal : ahm3 is defined at u-point |
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26 | !! or geopotential ahm4 is defined at v-point |
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27 | !! iso-model level : ahm3, ahm4 not used |
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28 | !! |
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29 | !! biharmonic operator : ahm3 is defined at u-point |
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30 | !! ahm4 is defined at v-point |
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31 | !! : ahm1, ahm2 not used |
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32 | !! |
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33 | !!---------------------------------------------------------------------- |
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34 | LOGICAL, INTENT (in) :: ld_print ! If true, output arrays on numout |
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35 | ! |
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36 | INTEGER :: ji, jj |
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37 | REAL(wp) :: za00, zd_max, zetmax, zeumax, zefmax, zevmax |
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38 | !!---------------------------------------------------------------------- |
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39 | |
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40 | IF(lwp) WRITE(numout,*) |
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41 | IF(lwp) WRITE(numout,*) 'ldf_dyn_c2d : 2d lateral eddy viscosity coefficient' |
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42 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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43 | |
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44 | ! harmonic operator (ahm1, ahm2) : ( T- and F- points) (used for laplacian operators |
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45 | ! =============================== whatever its orientation is) |
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46 | IF( ln_dynldf_lap ) THEN |
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47 | ! define ahm1 and ahm2 at the right grid point position |
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48 | ! (USER: modify ahm1 and ahm2 following your desiderata) |
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49 | |
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50 | zd_max = MAX( MAXVAL( e1t(:,:) ), MAXVAL( e2t(:,:) ) ) |
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51 | IF( lk_mpp ) CALL mpp_max( zd_max ) ! max over the global domain |
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52 | |
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53 | IF(lwp) WRITE(numout,*) ' laplacian operator: ahm proportional to e1' |
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54 | IF(lwp) WRITE(numout,*) ' maximum grid-spacing = ', zd_max, ' maximum value for ahm = ', ahm0 |
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55 | |
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56 | za00 = ahm0 / zd_max |
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57 | DO jj = 1, jpj |
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58 | DO ji = 1, jpi |
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59 | zetmax = MAX( e1t(ji,jj), e2t(ji,jj) ) |
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60 | zefmax = MAX( e1f(ji,jj), e2f(ji,jj) ) |
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61 | ahm1(ji,jj) = za00 * zetmax |
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62 | ahm2(ji,jj) = za00 * zefmax |
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63 | END DO |
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64 | END DO |
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65 | |
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66 | IF( ln_dynldf_iso ) THEN |
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67 | IF(lwp) WRITE(numout,*) ' Caution, as implemented now, the isopycnal part of momentum' |
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68 | IF(lwp) WRITE(numout,*) ' mixing use aht0 as eddy viscosity coefficient. Thus, it is' |
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69 | IF(lwp) WRITE(numout,*) ' uniform and you must be sure that your ahm is greater than' |
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70 | IF(lwp) WRITE(numout,*) ' aht0 everywhere in the model domain.' |
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71 | ENDIF |
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72 | |
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73 | ! Special case for ORCA R1, R2 and R4 configurations (overwrite the value of ahm1 ahm2) |
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74 | ! ============================================== |
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75 | IF( cp_cfg == "orca" .AND. ( jp_cfg == 2 .OR. jp_cfg == 4 ) ) CALL ldf_dyn_c2d_orca( ld_print ) |
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76 | IF( cp_cfg == "orca" .AND. jp_cfg == 1) CALL ldf_dyn_c2d_orca_R1( ld_print ) |
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77 | |
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78 | ! Control print |
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79 | IF( lwp .AND. ld_print ) THEN |
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80 | WRITE(numout,*) |
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81 | WRITE(numout,*) 'inildf: 2D ahm1 array' |
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82 | CALL prihre(ahm1,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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83 | WRITE(numout,*) |
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84 | WRITE(numout,*) 'inildf: 2D ahm2 array' |
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85 | CALL prihre(ahm2,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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86 | ENDIF |
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87 | ENDIF |
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88 | |
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89 | ! biharmonic operator (ahm3, ahm4) : at U- and V-points (used for bilaplacian operator |
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90 | ! ================================= whatever its orientation is) |
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91 | IF( ln_dynldf_bilap ) THEN |
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92 | ! (USER: modify ahm3 and ahm4 following your desiderata) |
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93 | ! Here: ahm is proportional to the cube of the maximum of the gridspacing |
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94 | ! in the to horizontal direction |
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95 | |
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96 | zd_max = MAX( MAXVAL( e1u(:,:) ), MAXVAL( e2u(:,:) ) ) |
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97 | IF( lk_mpp ) CALL mpp_max( zd_max ) ! max over the global domain |
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98 | |
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99 | IF(lwp) WRITE(numout,*) ' bi-laplacian operator: ahm proportional to e1**3 ' |
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100 | IF(lwp) WRITE(numout,*) ' maximum grid-spacing = ', zd_max, ' maximum value for ahm = ', ahm0 |
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101 | |
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102 | za00 = ahm0_blp / ( zd_max * zd_max * zd_max ) |
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103 | DO jj = 1, jpj |
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104 | DO ji = 1, jpi |
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105 | zeumax = MAX( e1u(ji,jj), e2u(ji,jj) ) |
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106 | zevmax = MAX( e1v(ji,jj), e2v(ji,jj) ) |
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107 | ahm3(ji,jj) = za00 * zeumax * zeumax * zeumax |
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108 | ahm4(ji,jj) = za00 * zevmax * zevmax * zevmax |
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109 | END DO |
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110 | END DO |
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111 | |
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112 | ! Control print |
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113 | IF( lwp .AND. ld_print ) THEN |
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114 | WRITE(numout,*) |
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115 | WRITE(numout,*) 'inildf: ahm3 array' |
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116 | CALL prihre(ahm3,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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117 | WRITE(numout,*) |
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118 | WRITE(numout,*) 'inildf: ahm4 array' |
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119 | CALL prihre(ahm4,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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120 | ENDIF |
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121 | ENDIF |
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122 | ! |
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123 | END SUBROUTINE ldf_dyn_c2d |
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124 | |
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125 | |
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126 | SUBROUTINE ldf_dyn_c2d_orca( ld_print ) |
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127 | !!---------------------------------------------------------------------- |
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128 | !! *** ROUTINE ldf_dyn_c2d *** |
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129 | !! |
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130 | !! **** W A R N I N G **** |
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131 | !! |
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132 | !! ORCA R2 and R4 configurations |
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133 | !! |
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134 | !! **** W A R N I N G **** |
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135 | !! |
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136 | !! ** Purpose : initializations of the lateral viscosity for orca R2 |
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137 | !! |
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138 | !! ** Method : blah blah blah... |
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139 | !! |
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140 | !!---------------------------------------------------------------------- |
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141 | USE ldftra_oce, ONLY: aht0 |
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142 | USE iom |
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143 | ! |
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144 | LOGICAL, INTENT (in) :: ld_print ! If true, output arrays on numout |
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145 | ! |
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146 | INTEGER :: ji, jj, jn ! dummy loop indices |
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147 | INTEGER :: inum, iim, ijm ! local integers |
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148 | INTEGER :: ifreq, il1, il2, ij, ii |
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149 | INTEGER :: ijpt0,ijpt1, ierror |
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150 | REAL(wp) :: zahmeq, zcoft, zcoff, zmsk |
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151 | CHARACTER (len=15) :: clexp |
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152 | INTEGER, POINTER, DIMENSION(:,:) :: icof |
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153 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ztemp2d ! temporary array to read ahmcoef file |
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154 | !!---------------------------------------------------------------------- |
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155 | ! |
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156 | CALL wrk_alloc( jpi , jpj , icof ) |
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157 | ! |
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158 | IF(lwp) WRITE(numout,*) |
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159 | IF(lwp) WRITE(numout,*) 'inildf: 2d eddy viscosity coefficient' |
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160 | IF(lwp) WRITE(numout,*) '~~~~~~ --' |
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161 | IF(lwp) WRITE(numout,*) ' orca ocean configuration' |
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162 | |
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163 | IF( cp_cfg == "orca" .AND. cp_cfz == "antarctic" ) THEN |
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164 | ! |
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165 | ! 1.2 Modify ahm |
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166 | ! -------------- |
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167 | IF(lwp)WRITE(numout,*) ' inildf: Antarctic ocean' |
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168 | IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' |
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169 | IF(lwp)WRITE(numout,*) ' north boundary increase' |
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170 | |
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171 | ahm1(:,:) = ahm0 |
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172 | ahm2(:,:) = ahm0 |
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173 | |
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174 | ijpt0=max(1,min(49 -njmpp+1,jpj)) |
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175 | ijpt1=max(0,min(49-njmpp+1,jpj-1)) |
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176 | DO jj=ijpt0,ijpt1 |
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177 | ahm2(:,jj)=ahm0*2. |
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178 | ahm1(:,jj)=ahm0*2. |
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179 | END DO |
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180 | ijpt0=max(1,min(48 -njmpp+1,jpj)) |
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181 | ijpt1=max(0,min(48-njmpp+1,jpj-1)) |
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182 | DO jj=ijpt0,ijpt1 |
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183 | ahm2(:,jj)=ahm0*1.9 |
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184 | ahm1(:,jj)=ahm0*1.75 |
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185 | END DO |
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186 | ijpt0=max(1,min(47 -njmpp+1,jpj)) |
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187 | ijpt1=max(0,min(47-njmpp+1,jpj-1)) |
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188 | DO jj=ijpt0,ijpt1 |
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189 | ahm2(:,jj)=ahm0*1.5 |
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190 | ahm1(:,jj)=ahm0*1.25 |
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191 | END DO |
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192 | ijpt0=max(1,min(46 -njmpp+1,jpj)) |
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193 | ijpt1=max(0,min(46-njmpp+1,jpj-1)) |
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194 | DO jj=ijpt0,ijpt1 |
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195 | ahm2(:,jj)=ahm0*1.1 |
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196 | END DO |
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197 | |
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198 | ELSE IF( cp_cfg == "orca" .AND. cp_cfz == "arctic" ) THEN |
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199 | ! 1.2 Modify ahm |
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200 | ! -------------- |
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201 | IF(lwp)WRITE(numout,*) ' inildf: Arctic ocean' |
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202 | IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' |
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203 | IF(lwp)WRITE(numout,*) ' south and west boundary increase' |
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204 | |
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205 | |
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206 | ahm1(:,:) = ahm0 |
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207 | ahm2(:,:) = ahm0 |
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208 | |
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209 | ijpt0=max(1,min(98-jpjzoom+1-njmpp+1,jpj)) |
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210 | ijpt1=max(0,min(98-jpjzoom+1-njmpp+1,jpj-1)) |
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211 | DO jj=ijpt0,ijpt1 |
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212 | ahm2(:,jj)=ahm0*2. |
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213 | ahm1(:,jj)=ahm0*2. |
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214 | END DO |
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215 | ijpt0=max(1,min(99-jpjzoom+1-njmpp+1,jpj)) |
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216 | ijpt1=max(0,min(99-jpjzoom+1-njmpp+1,jpj-1)) |
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217 | DO jj=ijpt0,ijpt1 |
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218 | ahm2(:,jj)=ahm0*1.9 |
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219 | ahm1(:,jj)=ahm0*1.75 |
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220 | END DO |
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221 | ijpt0=max(1,min(100-jpjzoom+1-njmpp+1,jpj)) |
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222 | ijpt1=max(0,min(100-jpjzoom+1-njmpp+1,jpj-1)) |
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223 | DO jj=ijpt0,ijpt1 |
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224 | ahm2(:,jj)=ahm0*1.5 |
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225 | ahm1(:,jj)=ahm0*1.25 |
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226 | END DO |
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227 | ijpt0=max(1,min(101-jpjzoom+1-njmpp+1,jpj)) |
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228 | ijpt1=max(0,min(101-jpjzoom+1-njmpp+1,jpj-1)) |
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229 | DO jj=ijpt0,ijpt1 |
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230 | ahm2(:,jj)=ahm0*1.1 |
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231 | END DO |
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232 | ELSE |
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233 | ! Read 2d integer array to specify western boundary increase in the |
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234 | ! ===================== equatorial strip (20N-20S) defined at t-points |
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235 | ! |
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236 | ALLOCATE( ztemp2d(jpi,jpj) ) |
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237 | ztemp2d(:,:) = 0. |
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238 | CALL iom_open ( 'ahmcoef.nc', inum ) |
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239 | CALL iom_get ( inum, jpdom_data, 'icof', ztemp2d) |
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240 | icof(:,:) = NINT(ztemp2d(:,:)) |
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241 | CALL iom_close( inum ) |
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242 | DEALLOCATE(ztemp2d) |
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243 | |
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244 | ! Set ahm1 and ahm2 ( T- and F- points) (used for laplacian operator) |
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245 | ! ================= |
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246 | ! define ahm1 and ahm2 at the right grid point position |
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247 | ! (USER: modify ahm1 and ahm2 following your desiderata) |
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248 | |
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249 | |
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250 | ! Decrease ahm to zahmeq m2/s in the tropics |
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251 | ! (from 90 to 20 degre: ahm = constant |
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252 | ! from 20 to 2.5 degre: ahm = decrease in (1-cos)/2 |
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253 | ! from 2.5 to 0 degre: ahm = constant |
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254 | ! symmetric in the south hemisphere) |
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255 | |
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256 | zahmeq = aht0 |
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257 | |
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258 | DO jj = 1, jpj |
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259 | DO ji = 1, jpi |
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260 | IF( ABS( gphif(ji,jj) ) >= 20. ) THEN |
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261 | ahm2(ji,jj) = ahm0 |
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262 | ELSEIF( ABS( gphif(ji,jj) ) <= 2.5 ) THEN |
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263 | ahm2(ji,jj) = zahmeq |
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264 | ELSE |
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265 | ahm2(ji,jj) = zahmeq + (ahm0-zahmeq)/2. & |
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266 | * ( 1. - COS( rad * ( ABS(gphif(ji,jj))-2.5 ) * 180. / 17.5 ) ) |
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267 | ENDIF |
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268 | IF( ABS( gphit(ji,jj) ) >= 20. ) THEN |
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269 | ahm1(ji,jj) = ahm0 |
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270 | ELSEIF( ABS( gphit(ji,jj) ) <= 2.5 ) THEN |
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271 | ahm1(ji,jj) = zahmeq |
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272 | ELSE |
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273 | ahm1(ji,jj) = zahmeq + (ahm0-zahmeq)/2. & |
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274 | * ( 1. - COS( rad * ( ABS(gphit(ji,jj))-2.5 ) * 180. / 17.5 ) ) |
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275 | ENDIF |
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276 | END DO |
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277 | END DO |
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278 | |
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279 | ! increase along western boundaries of equatorial strip |
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280 | ! t-point |
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281 | DO jj = 1, jpjm1 |
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282 | DO ji = 1, jpim1 |
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283 | zcoft = FLOAT( icof(ji,jj) ) / 100. |
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284 | ahm1(ji,jj) = zcoft * ahm0 + (1.-zcoft) * ahm1(ji,jj) |
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285 | END DO |
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286 | END DO |
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287 | ! f-point |
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288 | icof(:,:) = icof(:,:) * tmask(:,:,1) |
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289 | DO jj = 1, jpjm1 |
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290 | DO ji = 1, jpim1 ! NO vector opt. |
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291 | zmsk = tmask(ji,jj+1,1) + tmask(ji+1,jj+1,1) + tmask(ji,jj,1) + tmask(ji,jj+1,1) |
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292 | IF( zmsk == 0. ) THEN |
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293 | zcoff = 1. |
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294 | ELSE |
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295 | zcoff = FLOAT( icof(ji,jj+1) + icof(ji+1,jj+1) + icof(ji,jj) + icof(ji,jj+1) ) & |
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296 | / (zmsk * 100.) |
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297 | ENDIF |
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298 | ahm2(ji,jj) = zcoff * ahm0 + (1.-zcoff) * ahm2(ji,jj) |
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299 | END DO |
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300 | END DO |
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301 | ENDIF |
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302 | |
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303 | ! Lateral boundary conditions on ( ahm1, ahm2 ) |
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304 | ! ============== |
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305 | CALL lbc_lnk( ahm1, 'T', 1. ) ! T-point, unchanged sign |
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306 | CALL lbc_lnk( ahm2, 'F', 1. ) ! F-point, unchanged sign |
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307 | |
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308 | ! Control print |
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309 | IF( lwp .AND. ld_print ) THEN |
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310 | WRITE(numout,*) |
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311 | WRITE(numout,*) 'inildf: 2D ahm1 array' |
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312 | CALL prihre(ahm1,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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313 | WRITE(numout,*) |
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314 | WRITE(numout,*) 'inildf: 2D ahm2 array' |
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315 | CALL prihre(ahm2,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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316 | ENDIF |
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317 | ! |
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318 | CALL wrk_dealloc( jpi , jpj , icof ) |
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319 | ! |
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320 | END SUBROUTINE ldf_dyn_c2d_orca |
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321 | |
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322 | |
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323 | SUBROUTINE ldf_dyn_c2d_orca_R1( ld_print ) |
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324 | !!---------------------------------------------------------------------- |
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325 | !! *** ROUTINE ldf_dyn_c2d *** |
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326 | !! |
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327 | !! **** W A R N I N G **** |
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328 | !! |
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329 | !! ORCA R1 configuration |
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330 | !! |
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331 | !! **** W A R N I N G **** |
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332 | !! |
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333 | !! ** Purpose : initializations of the lateral viscosity for orca R1 |
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334 | !! |
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335 | !! ** Method : blah blah blah... |
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336 | !! |
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337 | !!---------------------------------------------------------------------- |
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338 | USE ldftra_oce, ONLY: aht0 |
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339 | USE iom |
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340 | ! |
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341 | LOGICAL, INTENT (in) :: ld_print ! If true, output arrays on numout |
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342 | ! |
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343 | INTEGER :: ji, jj, jn ! dummy loop indices |
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344 | INTEGER :: inum ! temporary logical unit |
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345 | INTEGER :: iim, ijm |
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346 | INTEGER :: ifreq, il1, il2, ij, ii |
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347 | INTEGER :: ijpt0,ijpt1, ierror |
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348 | REAL(wp) :: zahmeq, zcoft, zcoff, zmsk, zam20s |
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349 | CHARACTER (len=15) :: clexp |
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350 | INTEGER, POINTER, DIMENSION(:,:) :: icof |
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351 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ztemp2d ! temporary array to read ahmcoef file |
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352 | !!---------------------------------------------------------------------- |
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353 | ! |
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354 | CALL wrk_alloc( jpi , jpj , icof ) |
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355 | ! |
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356 | IF(lwp) WRITE(numout,*) |
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357 | IF(lwp) WRITE(numout,*) 'inildf: 2d eddy viscosity coefficient' |
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358 | IF(lwp) WRITE(numout,*) '~~~~~~ --' |
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359 | IF(lwp) WRITE(numout,*) ' orca_r1 configuration' |
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360 | |
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361 | IF( cp_cfg == "orca" .AND. cp_cfz == "antarctic" ) THEN |
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362 | ! |
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363 | ! 1.2 Modify ahm |
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364 | ! -------------- |
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365 | IF(lwp)WRITE(numout,*) ' inildf: Antarctic ocean' |
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366 | IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' |
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367 | IF(lwp)WRITE(numout,*) ' north boundary increase' |
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368 | |
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369 | ahm1(:,:) = ahm0 |
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370 | ahm2(:,:) = ahm0 |
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371 | |
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372 | ijpt0=max(1,min(49 -njmpp+1,jpj)) |
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373 | ijpt1=max(0,min(49-njmpp+1,jpj-1)) |
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374 | DO jj=ijpt0,ijpt1 |
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375 | ahm2(:,jj)=ahm0*2. |
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376 | ahm1(:,jj)=ahm0*2. |
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377 | END DO |
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378 | ijpt0=max(1,min(48 -njmpp+1,jpj)) |
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379 | ijpt1=max(0,min(48-njmpp+1,jpj-1)) |
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380 | DO jj=ijpt0,ijpt1 |
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381 | ahm2(:,jj)=ahm0*1.9 |
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382 | ahm1(:,jj)=ahm0*1.75 |
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383 | END DO |
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384 | ijpt0=max(1,min(47 -njmpp+1,jpj)) |
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385 | ijpt1=max(0,min(47-njmpp+1,jpj-1)) |
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386 | DO jj=ijpt0,ijpt1 |
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387 | ahm2(:,jj)=ahm0*1.5 |
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388 | ahm1(:,jj)=ahm0*1.25 |
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389 | END DO |
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390 | ijpt0=max(1,min(46 -njmpp+1,jpj)) |
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391 | ijpt1=max(0,min(46-njmpp+1,jpj-1)) |
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392 | DO jj=ijpt0,ijpt1 |
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393 | ahm2(:,jj)=ahm0*1.1 |
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394 | END DO |
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395 | |
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396 | ELSE IF( cp_cfg == "orca" .AND. cp_cfz == "arctic" ) THEN |
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397 | ! 1.2 Modify ahm |
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398 | ! -------------- |
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399 | IF(lwp)WRITE(numout,*) ' inildf: Arctic ocean' |
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400 | IF(lwp)WRITE(numout,*) ' no tropics, no reduction of ahm' |
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401 | IF(lwp)WRITE(numout,*) ' south and west boundary increase' |
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402 | |
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403 | |
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404 | ahm1(:,:) = ahm0 |
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405 | ahm2(:,:) = ahm0 |
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406 | |
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407 | ijpt0=max(1,min(98-jpjzoom+1-njmpp+1,jpj)) |
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408 | ijpt1=max(0,min(98-jpjzoom+1-njmpp+1,jpj-1)) |
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409 | DO jj=ijpt0,ijpt1 |
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410 | ahm2(:,jj)=ahm0*2. |
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411 | ahm1(:,jj)=ahm0*2. |
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412 | END DO |
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413 | ijpt0=max(1,min(99-jpjzoom+1-njmpp+1,jpj)) |
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414 | ijpt1=max(0,min(99-jpjzoom+1-njmpp+1,jpj-1)) |
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415 | DO jj=ijpt0,ijpt1 |
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416 | ahm2(:,jj)=ahm0*1.9 |
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417 | ahm1(:,jj)=ahm0*1.75 |
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418 | END DO |
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419 | ijpt0=max(1,min(100-jpjzoom+1-njmpp+1,jpj)) |
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420 | ijpt1=max(0,min(100-jpjzoom+1-njmpp+1,jpj-1)) |
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421 | DO jj=ijpt0,ijpt1 |
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422 | ahm2(:,jj)=ahm0*1.5 |
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423 | ahm1(:,jj)=ahm0*1.25 |
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424 | END DO |
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425 | ijpt0=max(1,min(101-jpjzoom+1-njmpp+1,jpj)) |
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426 | ijpt1=max(0,min(101-jpjzoom+1-njmpp+1,jpj-1)) |
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427 | DO jj=ijpt0,ijpt1 |
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428 | ahm2(:,jj)=ahm0*1.1 |
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429 | END DO |
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430 | ELSE |
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431 | |
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432 | ! Read 2d integer array to specify western boundary increase in the |
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433 | ! ===================== equatorial strip (20N-20S) defined at t-points |
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434 | ALLOCATE( ztemp2d(jpi,jpj) ) |
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435 | ztemp2d(:,:) = 0. |
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436 | CALL iom_open ( 'ahmcoef.nc', inum ) |
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437 | CALL iom_get ( inum, jpdom_data, 'icof', ztemp2d) |
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438 | icof(:,:) = NINT(ztemp2d(:,:)) |
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439 | CALL iom_close( inum ) |
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440 | DEALLOCATE(ztemp2d) |
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441 | |
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442 | ! Set ahm1 and ahm2 ( T- and F- points) (used for laplacian operator) |
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443 | ! ================= |
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444 | ! define ahm1 and ahm2 at the right grid point position |
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445 | ! (USER: modify ahm1 and ahm2 following your desiderata) |
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446 | |
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447 | |
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448 | ! Decrease ahm to zahmeq m2/s in the tropics |
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449 | ! (from 90 to 20 degrees: ahm = scaled by local metrics |
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450 | ! from 20 to 2.5 degrees: ahm = decrease in (1-cos)/2 |
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451 | ! from 2.5 to 0 degrees: ahm = constant |
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452 | ! symmetric in the south hemisphere) |
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453 | |
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454 | zahmeq = aht0 |
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455 | zam20s = ahm0*COS( rad * 20. ) |
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456 | |
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457 | DO jj = 1, jpj |
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458 | DO ji = 1, jpi |
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459 | IF( ABS( gphif(ji,jj) ) >= 20. ) THEN |
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460 | ! leave as set in ldf_dyn_c2d |
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461 | ELSEIF( ABS( gphif(ji,jj) ) <= 2.5 ) THEN |
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462 | ahm2(ji,jj) = zahmeq |
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463 | ELSE |
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464 | ahm2(ji,jj) = zahmeq + (zam20s-zahmeq)/2. & |
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465 | * ( 1. - COS( rad * ( ABS(gphif(ji,jj))-2.5 ) * 180. / 17.5 ) ) |
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466 | ENDIF |
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467 | IF( ABS( gphit(ji,jj) ) >= 20. ) THEN |
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468 | ! leave as set in ldf_dyn_c2d |
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469 | ELSEIF( ABS( gphit(ji,jj) ) <= 2.5 ) THEN |
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470 | ahm1(ji,jj) = zahmeq |
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471 | ELSE |
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472 | ahm1(ji,jj) = zahmeq + (zam20s-zahmeq)/2. & |
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473 | * ( 1. - COS( rad * ( ABS(gphit(ji,jj))-2.5 ) * 180. / 17.5 ) ) |
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474 | ENDIF |
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475 | END DO |
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476 | END DO |
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477 | |
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478 | ! increase along western boundaries of equatorial strip |
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479 | ! t-point |
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480 | DO jj = 1, jpjm1 |
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481 | DO ji = 1, jpim1 |
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482 | IF( ABS( gphit(ji,jj) ) < 20. ) THEN |
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483 | zcoft = FLOAT( icof(ji,jj) ) / 100. |
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484 | ahm1(ji,jj) = zcoft * ahm0 + (1.-zcoft) * ahm1(ji,jj) |
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485 | ENDIF |
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486 | END DO |
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487 | END DO |
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488 | ! f-point |
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489 | icof(:,:) = icof(:,:) * tmask(:,:,1) |
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490 | DO jj = 1, jpjm1 |
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491 | DO ji = 1, jpim1 |
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492 | IF( ABS( gphif(ji,jj) ) < 20. ) THEN |
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493 | zmsk = tmask(ji,jj+1,1) + tmask(ji+1,jj+1,1) + tmask(ji,jj,1) + tmask(ji,jj+1,1) |
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494 | IF( zmsk == 0. ) THEN |
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495 | zcoff = 1. |
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496 | ELSE |
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497 | zcoff = FLOAT( icof(ji,jj+1) + icof(ji+1,jj+1) + icof(ji,jj) + icof(ji,jj+1) ) & |
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498 | / (zmsk * 100.) |
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499 | ENDIF |
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500 | ahm2(ji,jj) = zcoff * ahm0 + (1.-zcoff) * ahm2(ji,jj) |
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501 | ENDIF |
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502 | END DO |
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503 | END DO |
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504 | ENDIF |
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505 | |
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506 | ! Lateral boundary conditions on ( ahm1, ahm2 ) |
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507 | ! ============== |
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508 | CALL lbc_lnk( ahm1, 'T', 1. ) ! T-point, unchanged sign |
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509 | CALL lbc_lnk( ahm2, 'F', 1. ) ! F-point, unchanged sign |
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510 | |
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511 | ! Control print |
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512 | IF( lwp .AND. ld_print ) THEN |
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513 | WRITE(numout,*) |
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514 | WRITE(numout,*) 'inildf: 2D ahm1 array' |
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515 | CALL prihre(ahm1,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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516 | WRITE(numout,*) |
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517 | WRITE(numout,*) 'inildf: 2D ahm2 array' |
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518 | CALL prihre(ahm2,jpi,jpj,1,jpi,1,1,jpj,1,1.e-3,numout) |
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519 | ENDIF |
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520 | ! |
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521 | CALL wrk_dealloc( jpi , jpj , icof ) |
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522 | ! |
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523 | END SUBROUTINE ldf_dyn_c2d_orca_R1 |
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