1 | MODULE domhgr |
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2 | !!============================================================================== |
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3 | !! *** MODULE domhgr *** |
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4 | !! Ocean initialization : domain initialization |
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5 | !!============================================================================== |
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6 | !! History : OPA ! 1988-03 (G. Madec) Original code |
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7 | !! 7.0 ! 1996-01 (G. Madec) terrain following coordinates |
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8 | !! 8.0 ! 1997-02 (G. Madec) print mesh informations |
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9 | !! 8.1 ! 1999-11 (M. Imbard) NetCDF format with IO-IPSL |
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10 | !! 8.2 ! 2000-08 (D. Ludicone) Reduced section at Bab el Mandeb |
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11 | !! - ! 2001-09 (M. Levy) eel config: grid in km, beta-plane |
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12 | !! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and module, namelist |
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13 | !! - ! 2004-01 (A.M. Treguier, J.M. Molines) Case 4 (Mercator mesh) |
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14 | !! use of parameters in par_CONFIG-Rxx.h90, not in namelist |
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15 | !! - ! 2004-05 (A. Koch-Larrouy) Add Gyre configuration |
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16 | !! 3.7 ! 2015-09 (G. Madec, S. Flavoni) add cell surface and their inverse |
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17 | !! add optional read of e1e2u & e1e2v |
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18 | !! - ! 2016-04 (S. Flavoni) change configuration's interface: |
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19 | !! read file or CALL usr_def module to compute |
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20 | !! horizontal grid (example given for GYRE) |
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21 | !!---------------------------------------------------------------------- |
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22 | |
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23 | !!---------------------------------------------------------------------- |
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24 | !! dom_hgr : initialize the horizontal mesh |
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25 | !! hgr_read : read "coordinate" NetCDF file |
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26 | !!---------------------------------------------------------------------- |
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27 | USE dom_oce ! ocean space and time domain |
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28 | USE par_oce ! ocean space and time domain |
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29 | USE phycst ! physical constants |
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30 | USE usrdef ! User defined routine |
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31 | ! USE domwri ! write 'meshmask.nc' & 'coordinate_e1e2u_v.nc' files |
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32 | ! |
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33 | USE in_out_manager ! I/O manager |
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34 | USE lib_mpp ! MPP library |
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35 | USE timing ! Timing |
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36 | |
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37 | IMPLICIT NONE |
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38 | PRIVATE |
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39 | |
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40 | REAL(wp) :: glam0, gphi0 ! variables corresponding to parameters ppglam0 ppgphi0 set in namelist !SF modify some routines???? |
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41 | |
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42 | PUBLIC dom_hgr ! called by domain.F90 |
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43 | |
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44 | !!---------------------------------------------------------------------- |
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45 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
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46 | !! $Id$ |
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47 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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48 | !!---------------------------------------------------------------------- |
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49 | CONTAINS |
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50 | |
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51 | SUBROUTINE dom_hgr |
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52 | !!---------------------------------------------------------------------- |
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53 | !! *** ROUTINE dom_hgr *** |
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54 | !! |
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55 | !! ** Purpose : Compute the geographical position (in degre) of the |
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56 | !! model grid-points, the horizontal scale factors (in meters) and |
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57 | !! the Coriolis factor (in s-1). |
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58 | !! |
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59 | !! ** Method : Controlled by ln_read_cfg logical |
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60 | !! =T : all needed arrays are read in mesh_mask.nc file |
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61 | !! =F : user-defined configuration, all needed arrays |
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62 | !! are computed in usr-def_hgr subroutine |
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63 | !! |
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64 | !! If Coriolis factor is neither read nor computed (iff=0) |
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65 | !! it is computed from gphit assuming that the mesh is |
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66 | !! defined on the sphere : |
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67 | !! ff = 2.*omega*sin(gphif) (in s-1) |
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68 | !! |
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69 | !! If u- & v-surfaces are neither read nor computed (ie1e2u_v=0) |
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70 | !! (i.e. no use of reduced scale factors in some straits) |
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71 | !! they are computed from e1u, e2u, e1v and e2v as: |
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72 | !! e1e2u = e1u*e2u and e1e2v = e1v*e2v |
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73 | !! |
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74 | !! ** Action : - define longitude & latitude of t-, u-, v- and f-points (in degrees) |
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75 | !! - define Coriolis parameter at f-point (in 1/s) |
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76 | !! - define i- & j-scale factors at t-, u-, v- and f-points (in meters) |
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77 | !! - define associated horizontal metrics at t-, u-, v- and f-points |
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78 | !! (inverse of scale factors 1/e1 & 1/e2, surface e1*e2, ratios e1/e2 & e2/e1) |
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79 | !!---------------------------------------------------------------------- |
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80 | INTEGER :: ji, jj ! dummy loop indices |
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81 | !INTEGER :: ii0, ii1, ij0, ij1, iff ! temporary integers |
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82 | !INTEGER :: ijeq ! index of equator T point (used in case 4) |
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83 | !REAL(wp) :: zti, zui, zvi, zfi ! local scalars |
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84 | !REAL(wp) :: ztj, zuj, zvj, zfj ! - - |
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85 | !REAL(wp) :: zphi0, zbeta, znorme ! |
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86 | !REAL(wp) :: zarg, zf0, zminff, zmaxff |
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87 | !REAL(wp) :: zlam1, zcos_alpha, zim1 , zjm1 , ze1, ze1deg |
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88 | !REAL(wp) :: zphi1, zsin_alpha, zim05, zjm05 |
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89 | !INTEGER :: isrow ! index for ORCA1 starting row |
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90 | INTEGER :: ie1e2u_v ! flag for u- & v-surfaces |
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91 | INTEGER :: iff ! flag for Coriolis parameter |
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92 | !!---------------------------------------------------------------------- |
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93 | ! |
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94 | IF( nn_timing == 1 ) CALL timing_start('dom_hgr') |
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95 | ! |
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96 | IF(lwp) THEN |
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97 | WRITE(numout,*) |
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98 | WRITE(numout,*) 'dom_hgr : define the horizontal mesh from ithe following par_oce parameters ' |
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99 | WRITE(numout,*) '~~~~~~~ ' |
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100 | ENDIF |
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101 | ! |
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102 | ! |
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103 | IF( ln_read_cfg ) THEN !== read in mesh_mask.nc file ==! |
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104 | IF(lwp) WRITE(numout,*) |
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105 | IF(lwp) WRITE(numout,*) ' read horizontal mesh in "mesh_mask" file' |
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106 | ! |
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107 | CALL hgr_read( ie1e2u_v, iff ) |
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108 | ! |
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109 | ELSE |
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110 | IF(lwp) WRITE(numout,*) ' ln_read_cfg CALL user_defined module' |
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111 | CALL usr_def_hgr( nbench , jp_cfg, iff , ff , & |
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112 | & glamt , glamu , glamv , glamf , & |
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113 | & gphit , gphiu , gphiv , gphif , & |
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114 | & e1t , e1u , e1v , e1f , & |
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115 | & e2t , e2u , e2v , e2f , & |
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116 | & ie1e2u_v ) |
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117 | ! |
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118 | ENDIF |
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119 | ! |
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120 | ! associated horizontal metrics |
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121 | ! ----------------------------- |
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122 | ! |
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123 | r1_e1t(:,:) = 1._wp / e1t(:,:) ; r1_e2t (:,:) = 1._wp / e2t(:,:) |
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124 | r1_e1u(:,:) = 1._wp / e1u(:,:) ; r1_e2u (:,:) = 1._wp / e2u(:,:) |
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125 | r1_e1v(:,:) = 1._wp / e1v(:,:) ; r1_e2v (:,:) = 1._wp / e2v(:,:) |
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126 | r1_e1f(:,:) = 1._wp / e1f(:,:) ; r1_e2f (:,:) = 1._wp / e2f(:,:) |
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127 | ! |
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128 | e1e2t (:,:) = e1t(:,:) * e2t(:,:) ; r1_e1e2t(:,:) = 1._wp / e1e2t(:,:) |
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129 | e1e2f (:,:) = e1f(:,:) * e2f(:,:) ; r1_e1e2f(:,:) = 1._wp / e1e2f(:,:) |
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130 | IF( ie1e2u_v == 0 ) THEN ! e1e2u and e1e2v have not been set: compute them |
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131 | e1e2u (:,:) = e1u(:,:) * e2u(:,:) |
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132 | e1e2v (:,:) = e1v(:,:) * e2v(:,:) |
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133 | ENDIF |
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134 | r1_e1e2u(:,:) = 1._wp / e1e2u(:,:) ! compute their invert in both cases |
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135 | r1_e1e2v(:,:) = 1._wp / e1e2v(:,:) |
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136 | ! |
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137 | e2_e1u(:,:) = e2u(:,:) / e1u(:,:) |
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138 | e1_e2v(:,:) = e1v(:,:) / e2v(:,:) |
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139 | |
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140 | ! ================= ! |
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141 | ! Coriolis factor ! |
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142 | ! ================= ! |
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143 | IF ( iff == 0 ) THEN ! Coriolis parameter has not been defined: compute it on the sphere |
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144 | ! |
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145 | ff(:,:) = 2. * omega * SIN( rad * gphif(:,:) ) |
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146 | ! |
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147 | ENDIF |
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148 | ! |
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149 | IF( nn_timing == 1 ) CALL timing_stop('dom_hgr') |
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150 | ! |
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151 | END SUBROUTINE dom_hgr |
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152 | |
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153 | |
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154 | SUBROUTINE hgr_read( ke1e2u_v, kff ) |
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155 | !!--------------------------------------------------------------------- |
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156 | !! *** ROUTINE hgr_read *** |
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157 | !! |
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158 | !! ** Purpose : Read a mesh_mask file in NetCDF format using IOM |
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159 | !! |
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160 | !!---------------------------------------------------------------------- |
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161 | USE iom |
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162 | !! |
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163 | INTEGER, INTENT( out ) :: ke1e2u_v ! fag: e1e2u & e1e2v read in mesh_mask file (=1) or not (=0) |
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164 | INTEGER, INTENT( out ) :: kff ! fag: kff read in mesh_mask file (=1) or not (=0) |
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165 | ! |
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166 | INTEGER :: inum ! temporary logical unit |
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167 | !!---------------------------------------------------------------------- |
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168 | ! |
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169 | IF(lwp) THEN |
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170 | WRITE(numout,*) |
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171 | WRITE(numout,*) 'hgr_read : read the horizontal coordinates in mesh_mask' |
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172 | WRITE(numout,*) '~~~~~~~~ jpiglo = ', jpiglo, ' jpjglo = ', jpjglo, ' jpk = ', jpk |
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173 | ENDIF |
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174 | ! |
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175 | CALL iom_open( 'mesh_mask', inum ) |
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176 | ! |
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177 | CALL iom_get( inum, jpdom_data, 'glamt', glamt, lrowattr=ln_use_jattr ) |
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178 | CALL iom_get( inum, jpdom_data, 'glamu', glamu, lrowattr=ln_use_jattr ) |
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179 | CALL iom_get( inum, jpdom_data, 'glamv', glamv, lrowattr=ln_use_jattr ) |
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180 | CALL iom_get( inum, jpdom_data, 'glamf', glamf, lrowattr=ln_use_jattr ) |
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181 | ! |
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182 | CALL iom_get( inum, jpdom_data, 'gphit', gphit, lrowattr=ln_use_jattr ) |
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183 | CALL iom_get( inum, jpdom_data, 'gphiu', gphiu, lrowattr=ln_use_jattr ) |
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184 | CALL iom_get( inum, jpdom_data, 'gphiv', gphiv, lrowattr=ln_use_jattr ) |
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185 | CALL iom_get( inum, jpdom_data, 'gphif', gphif, lrowattr=ln_use_jattr ) |
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186 | ! |
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187 | CALL iom_get( inum, jpdom_data, 'e1t' , e1t , lrowattr=ln_use_jattr ) |
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188 | CALL iom_get( inum, jpdom_data, 'e1u' , e1u , lrowattr=ln_use_jattr ) |
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189 | CALL iom_get( inum, jpdom_data, 'e1v' , e1v , lrowattr=ln_use_jattr ) |
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190 | CALL iom_get( inum, jpdom_data, 'e1f' , e1f , lrowattr=ln_use_jattr ) |
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191 | ! |
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192 | CALL iom_get( inum, jpdom_data, 'e2t' , e2t , lrowattr=ln_use_jattr ) |
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193 | CALL iom_get( inum, jpdom_data, 'e2u' , e2u , lrowattr=ln_use_jattr ) |
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194 | CALL iom_get( inum, jpdom_data, 'e2v' , e2v , lrowattr=ln_use_jattr ) |
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195 | CALL iom_get( inum, jpdom_data, 'e2f' , e2f , lrowattr=ln_use_jattr ) |
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196 | !SF add read coriolis in mesh_mask file |
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197 | CALL iom_get( inum, jpdom_data, 'ff' , ff , lrowattr=ln_use_jattr ) |
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198 | ! |
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199 | IF( iom_varid( inum, 'e1e2u', ldstop = .FALSE. ) > 0 ) THEN |
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200 | IF(lwp) WRITE(numout,*) 'hgr_read : e1e2u & e1e2v read in mesh_mask file' |
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201 | CALL iom_get( inum, jpdom_data, 'e1e2u' , e1e2u , lrowattr=ln_use_jattr ) |
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202 | CALL iom_get( inum, jpdom_data, 'e1e2v' , e1e2v , lrowattr=ln_use_jattr ) |
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203 | ke1e2u_v = 1 |
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204 | ELSE |
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205 | ke1e2u_v = 0 |
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206 | ENDIF |
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207 | ! |
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208 | IF( iom_varid( inum, 'kff', ldstop = .FALSE. ) > 0 ) THEN |
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209 | IF(lwp) WRITE(numout,*) 'hgr_read : ff read in mesh_mask file' |
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210 | CALL iom_get( inum, jpdom_data, 'ff' , ff , lrowattr=ln_use_jattr ) |
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211 | kff = 1 |
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212 | ELSE |
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213 | kff = 0 |
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214 | ENDIF |
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215 | ! |
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216 | CALL iom_close( inum ) |
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217 | |
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218 | END SUBROUTINE hgr_read |
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219 | |
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220 | !!====================================================================== |
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221 | END MODULE domhgr |
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