1 | MODULE step |
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2 | !!====================================================================== |
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3 | !! *** MODULE step *** |
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4 | !! Time-stepping : manager of the ocean, tracer and ice time stepping |
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5 | !!====================================================================== |
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6 | !! History : OPA ! 1991-03 (G. Madec) Original code |
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7 | !! - ! 1991-11 (G. Madec) |
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8 | !! - ! 1992-06 (M. Imbard) add a first output record |
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9 | !! - ! 1996-04 (G. Madec) introduction of dynspg |
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10 | !! - ! 1996-04 (M.A. Foujols) introduction of passive tracer |
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11 | !! 8.0 ! 1997-06 (G. Madec) new architecture of call |
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12 | !! 8.2 ! 1997-06 (G. Madec, M. Imbard, G. Roullet) free surface |
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13 | !! - ! 1999-02 (G. Madec, N. Grima) hpg implicit |
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14 | !! - ! 2000-07 (J-M Molines, M. Imbard) Open Bondary Conditions |
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15 | !! NEMO 1.0 ! 2002-06 (G. Madec) free form, suppress macro-tasking |
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16 | !! - ! 2004-08 (C. Talandier) New trends organization |
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17 | !! - ! 2005-01 (C. Ethe) Add the KPP closure scheme |
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18 | !! - ! 2005-11 (G. Madec) Reorganisation of tra and dyn calls |
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19 | !! - ! 2006-01 (L. Debreu, C. Mazauric) Agrif implementation |
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20 | !! - ! 2006-07 (S. Masson) restart using iom |
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21 | !! 3.2 ! 2009-02 (G. Madec, R. Benshila) reintroduicing z*-coordinate |
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22 | !! - ! 2009-06 (S. Masson, G. Madec) TKE restart compatible with key_cpl |
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23 | !! 3.3 ! 2010-05 (K. Mogensen, A. Weaver, M. Martin, D. Lea) Assimilation interface |
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24 | !! - ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase + merge TRC-TRA |
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25 | !! 3.4 ! 2011-04 (G. Madec, C. Ethe) Merge of dtatem and dtasal |
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26 | !! 3.6 ! 2012-07 (J. Simeon, G. Madec. C. Ethe) Online coarsening of outputs |
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27 | !! 3.6 ! 2014-04 (F. Roquet, G. Madec) New equations of state |
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28 | !! 3.6 ! 2014-10 (E. Clementi, P. Oddo) Add Qiao vertical mixing in case of waves |
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29 | !! 3.7 ! 2014-10 (G. Madec) LDF simplication |
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30 | !! - ! 2014-12 (G. Madec) remove KPP scheme |
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31 | !! - ! 2015-11 (J. Chanut) free surface simplification (remove filtered free surface) |
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32 | !! 4.0 ! 2017-05 (G. Madec) introduction of the vertical physics manager (zdfphy) |
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33 | !! 4.1 ! 2019-08 (A. Coward, D. Storkey) rewrite in preparation for new timestepping scheme |
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34 | !!---------------------------------------------------------------------- |
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35 | #if defined key_qco |
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36 | !!---------------------------------------------------------------------- |
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37 | !! 'key_qco' EMPTY MODULE Quasi-Eulerian vertical coordonate |
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38 | !!---------------------------------------------------------------------- |
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39 | #else |
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40 | !!---------------------------------------------------------------------- |
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41 | !! stp : OCE system time-stepping |
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42 | !!---------------------------------------------------------------------- |
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43 | USE step_oce ! time stepping definition modules |
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44 | ! |
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45 | USE iom ! xIOs server |
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46 | |
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47 | IMPLICIT NONE |
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48 | PRIVATE |
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49 | |
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50 | PUBLIC stp ! called by nemogcm.F90 |
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51 | |
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52 | !!---------------------------------------------------------------------- |
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53 | !! time level indices |
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54 | !!---------------------------------------------------------------------- |
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55 | INTEGER, PUBLIC :: Nbb, Nnn, Naa, Nrhs !! used by nemo_init |
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56 | |
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57 | !!---------------------------------------------------------------------- |
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58 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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59 | !! $Id: step.F90 13237 2020-07-03 09:12:53Z smasson $ |
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60 | !! Software governed by the CeCILL license (see ./LICENSE) |
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61 | !!---------------------------------------------------------------------- |
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62 | CONTAINS |
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63 | |
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64 | #if defined key_agrif |
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65 | RECURSIVE SUBROUTINE stp( ) |
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66 | INTEGER :: kstp ! ocean time-step index |
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67 | #else |
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68 | SUBROUTINE stp( kstp ) |
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69 | INTEGER, INTENT(in) :: kstp ! ocean time-step index |
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70 | #endif |
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71 | !!---------------------------------------------------------------------- |
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72 | !! *** ROUTINE stp *** |
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73 | !! |
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74 | !! ** Purpose : - Time stepping of OCE (momentum and active tracer eqs.) |
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75 | !! - Time stepping of SI3 (dynamic and thermodynamic eqs.) |
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76 | !! - Time stepping of TRC (passive tracer eqs.) |
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77 | !! |
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78 | !! ** Method : -1- Update forcings and data |
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79 | !! -2- Update ocean physics |
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80 | !! -3- Compute the t and s trends |
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81 | !! -4- Update t and s |
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82 | !! -5- Compute the momentum trends |
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83 | !! -6- Update the horizontal velocity |
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84 | !! -7- Compute the diagnostics variables (rd,N2, hdiv,w) |
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85 | !! -8- Outputs and diagnostics |
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86 | !!---------------------------------------------------------------------- |
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87 | INTEGER :: ji, jj, jk ! dummy loop indice |
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88 | !!gm kcall can be removed, I guess |
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89 | INTEGER :: kcall ! optional integer argument (dom_vvl_sf_nxt) |
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90 | !! --------------------------------------------------------------------- |
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91 | #if defined key_agrif |
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92 | IF( nstop > 0 ) RETURN ! avoid to go further if an error was detected during previous time step (child grid) |
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93 | kstp = nit000 + Agrif_Nb_Step() |
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94 | Kbb_a = Nbb; Kmm_a = Nnn; Krhs_a = Nrhs ! agrif_oce module copies of time level indices |
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95 | IF( lk_agrif_debug ) THEN |
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96 | IF( Agrif_Root() .and. lwp) WRITE(*,*) '---' |
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97 | IF(lwp) WRITE(*,*) 'Grid Number', Agrif_Fixed(),' time step ', kstp, 'int tstep', Agrif_NbStepint() |
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98 | ENDIF |
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99 | IF( kstp == nit000 + 1 ) lk_agrif_fstep = .FALSE. |
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100 | # if defined key_xios |
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101 | IF( Agrif_Nbstepint() == 0 ) CALL iom_swap( cxios_context ) |
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102 | # endif |
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103 | #endif |
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104 | ! |
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105 | IF( ln_timing ) CALL timing_start('stp') |
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106 | ! |
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107 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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108 | ! model timestep |
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109 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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110 | ! |
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111 | IF( l_1st_euler ) THEN |
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112 | ! start or restart with Euler 1st time-step |
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113 | rDt = rn_Dt |
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114 | r1_Dt = 1._wp / rDt |
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115 | ENDIF |
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116 | ! |
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117 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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118 | ! update I/O and calendar |
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119 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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120 | IF( kstp == nit000 ) THEN ! initialize IOM context (must be done after nemo_init for AGRIF+XIOS+OASIS) |
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121 | CALL iom_init( cxios_context, ld_closedef=.FALSE. ) ! for model grid (including possible AGRIF zoom) |
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122 | IF( lk_diamlr ) CALL dia_mlr_iom_init ! with additional setup for multiple-linear-regression analysis |
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123 | CALL iom_init_closedef |
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124 | IF( ln_crs ) CALL iom_init( TRIM(cxios_context)//"_crs" ) ! for coarse grid |
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125 | ENDIF |
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126 | IF( kstp /= nit000 ) CALL day( kstp ) ! Calendar (day was already called at nit000 in day_init) |
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127 | CALL iom_setkt( kstp - nit000 + 1, cxios_context ) ! tell IOM we are at time step kstp |
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128 | |
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129 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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130 | ! Update external forcing (tides, open boundaries, ice shelf interaction and surface boundary condition (including sea-ice) |
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131 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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132 | CALL sbc ( kstp, Nbb, Nnn ) ! Sea Boundary Condition (including sea-ice) |
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133 | |
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134 | CALL dia_wri ( kstp, Nnn ) ! ocean model: outputs |
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135 | |
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136 | !!gm : This does not only concern the dynamics ==>>> add a new title |
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137 | !!gm2: why ouput restart before AGRIF update? |
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138 | !! |
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139 | !!jc: That would be better, but see comment above |
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140 | !! |
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141 | IF( lrst_oce ) CALL rst_write ( kstp, Nbb, Nnn ) ! write output ocean restart file |
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142 | |
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143 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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144 | ! File manipulation at the end of the first time step |
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145 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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146 | IF( kstp == nit000 ) THEN ! 1st time step only |
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147 | CALL iom_close( numror ) ! close input ocean restart file |
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148 | IF(lwm) CALL FLUSH ( numond ) ! flush output namelist oce |
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149 | IF(lwm .AND. numoni /= -1 ) CALL FLUSH ( numoni ) ! flush output namelist ice (if exist) |
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150 | ENDIF |
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151 | ! |
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152 | #if defined key_xios |
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153 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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154 | ! Finalize contextes if end of simulation or error detected |
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155 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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156 | IF( kstp == nitend .OR. nstop > 0 ) THEN |
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157 | CALL iom_context_finalize( cxios_context ) ! needed for XIOS+AGRIF |
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158 | IF( lrxios ) CALL iom_context_finalize( crxios_context ) |
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159 | IF( ln_crs ) CALL iom_context_finalize( trim(cxios_context)//"_crs" ) ! |
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160 | ENDIF |
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161 | #endif |
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162 | ! |
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163 | IF( l_1st_euler ) THEN ! recover Leap-frog timestep |
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164 | rDt = 2._wp * rn_Dt |
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165 | r1_Dt = 1._wp / rDt |
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166 | l_1st_euler = .FALSE. |
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167 | ENDIF |
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168 | ! |
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169 | IF( ln_timing ) CALL timing_stop('stp') |
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170 | ! |
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171 | END SUBROUTINE stp |
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172 | ! |
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173 | #endif |
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174 | !!====================================================================== |
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175 | END MODULE step |
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