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) TKE2 restart compatible with key_cpl |
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23 | !!---------------------------------------------------------------------- |
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24 | |
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25 | !!---------------------------------------------------------------------- |
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26 | !! stp : OPA system time-stepping |
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27 | !!---------------------------------------------------------------------- |
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28 | USE oce ! ocean dynamics and tracers variables |
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29 | USE dom_oce ! ocean space and time domain variables |
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30 | USE zdf_oce ! ocean vertical physics variables |
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31 | USE ldftra_oce ! ocean tracer - trends |
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32 | USE ldfdyn_oce ! ocean dynamics - trends |
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33 | USE in_out_manager ! I/O manager |
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34 | USE iom ! |
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35 | USE lbclnk |
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36 | |
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37 | USE daymod ! calendar (day routine) |
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38 | |
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39 | USE dtatem ! ocean temperature data (dta_tem routine) |
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40 | USE dtasal ! ocean salinity data (dta_sal routine) |
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41 | USE sbcmod ! surface boundary condition (sbc routine) |
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42 | USE sbcrnf ! surface boundary condition: runoff variables |
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43 | USE sbccpl ! surface boundary condition: coupled formulation (call send at end of step) |
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44 | USE cpl_oasis3, ONLY : lk_cpl |
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45 | |
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46 | USE trcstp ! passive tracer time-stepping (trc_stp routine) |
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47 | |
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48 | USE traqsr ! solar radiation penetration (tra_qsr routine) |
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49 | USE trasbc ! surface boundary condition (tra_sbc routine) |
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50 | USE trabbc ! bottom boundary condition (tra_bbc routine) |
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51 | USE trabbl ! bottom boundary layer (tra_bbl routine) |
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52 | USE tradmp ! internal damping (tra_dmp routine) |
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53 | USE traadv ! advection scheme control (tra_adv_ctl routine) |
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54 | USE traldf ! lateral mixing (tra_ldf routine) |
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55 | USE cla ! cross land advection (tra_cla routine) |
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56 | ! zdfkpp ! KPP non-local tracer fluxes (tra_kpp routine) |
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57 | USE trazdf ! vertical mixing (tra_zdf routine) |
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58 | USE tranxt ! time-stepping (tra_nxt routine) |
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59 | USE tranpc ! non-penetrative convection (tra_npc routine) |
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60 | |
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61 | USE eosbn2 ! equation of state (eos_bn2 routine) |
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62 | |
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63 | USE dynadv ! advection (dyn_adv routine) |
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64 | USE dynvor ! vorticity term (dyn_vor routine) |
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65 | USE dynhpg ! hydrostatic pressure grad. (dyn_hpg routine) |
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66 | USE dynldf ! lateral momentum diffusion (dyn_ldf routine) |
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67 | USE dynzdf ! vertical diffusion (dyn_zdf routine) |
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68 | USE dynspg_oce ! surface pressure gradient (dyn_spg routine) |
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69 | USE dynspg ! surface pressure gradient (dyn_spg routine) |
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70 | USE dynnxt ! time-stepping (dyn_nxt routine) |
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71 | |
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72 | USE obc_par ! open boundary condition variables |
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73 | USE obcdta ! open boundary condition data (obc_dta routine) |
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74 | USE obcrst ! open boundary cond. restart (obc_rst routine) |
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75 | USE obcrad ! open boundary cond. radiation (obc_rad routine) |
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76 | |
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77 | USE bdy_par ! unstructured open boundary data variables |
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78 | USE bdydta ! unstructured open boundary data (bdy_dta routine) |
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79 | |
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80 | USE divcur ! hor. divergence and curl (div & cur routines) |
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81 | USE cla_div ! cross land: hor. divergence (div_cla routine) |
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82 | USE wzvmod ! vertical velocity (wzv routine) |
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83 | |
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84 | USE ldfslp ! iso-neutral slopes (ldf_slp routine) |
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85 | USE ldfeiv ! eddy induced velocity coef. (ldf_eiv routine) |
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86 | |
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87 | USE zdftmx ! tide-induced vertical mixing (zdf_tmx routine) |
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88 | USE zdfbfr ! bottom friction (zdf_bfr routine) |
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89 | USE zdftke ! TKE vertical mixing (zdf_tke routine) |
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90 | USE zdftke2 ! TKE2 vertical mixing (zdf_tke2 routine) |
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91 | USE zdfkpp ! KPP vertical mixing (zdf_kpp routine) |
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92 | USE zdfddm ! double diffusion mixing (zdf_ddm routine) |
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93 | USE zdfevd ! enhanced vertical diffusion (zdf_evd routine) |
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94 | USE zdfric ! Richardson vertical mixing (zdf_ric routine) |
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95 | USE zdfmxl ! Mixed-layer depth (zdf_mxl routine) |
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96 | |
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97 | USE zpshde ! partial step: hor. derivative (zps_hde routine) |
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98 | |
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99 | USE diawri ! Standard run outputs (dia_wri routine) |
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100 | USE trdicp ! Ocean momentum/tracers trends (trd_wri routine) |
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101 | USE trdmld ! mixed-layer trends (trd_mld routine) |
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102 | USE trdmld_rst ! restart for mixed-layer trends |
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103 | USE trdmod_oce ! ocean momentum/tracers trends |
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104 | USE trdvor ! vorticity budget (trd_vor routine) |
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105 | USE diagap ! hor. mean model-data gap (dia_gap routine) |
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106 | USE diahdy ! dynamic height (dia_hdy routine) |
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107 | USE diaptr ! poleward transports (dia_ptr routine) |
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108 | USE diahth ! thermocline depth (dia_hth routine) |
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109 | USE diafwb ! freshwater budget (dia_fwb routine) |
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110 | USE flo_oce ! floats variables |
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111 | USE floats ! floats computation (flo_stp routine) |
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112 | |
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113 | USE stpctl ! time stepping control (stp_ctl routine) |
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114 | USE restart ! ocean restart (rst_wri routine) |
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115 | USE prtctl ! Print control (prt_ctl routine) |
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116 | |
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117 | #if defined key_agrif |
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118 | USE agrif_opa_sponge ! Momemtum and tracers sponges |
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119 | #endif |
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120 | |
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121 | IMPLICIT NONE |
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122 | PRIVATE |
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123 | |
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124 | PUBLIC stp ! called by opa.F90 |
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125 | |
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126 | !! * Substitutions |
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127 | # include "domzgr_substitute.h90" |
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128 | # include "zdfddm_substitute.h90" |
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129 | !!---------------------------------------------------------------------- |
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130 | !! NEMO/OPA 3.2 , LOCEAN-IPSL (2009) |
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131 | !! $Id$ |
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132 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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133 | !!---------------------------------------------------------------------- |
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134 | |
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135 | CONTAINS |
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136 | |
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137 | #if defined key_agrif |
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138 | SUBROUTINE stp( ) |
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139 | INTEGER :: kstp ! ocean time-step index |
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140 | #else |
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141 | SUBROUTINE stp( kstp ) |
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142 | INTEGER, INTENT(in) :: kstp ! ocean time-step index |
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143 | #endif |
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144 | !!---------------------------------------------------------------------- |
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145 | !! *** ROUTINE stp *** |
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146 | !! |
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147 | !! ** Purpose : - Time stepping of OPA (momentum and active tracer eqs.) |
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148 | !! - Time stepping of LIM (dynamic and thermodynamic eqs.) |
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149 | !! - Tme stepping of TRC (passive tracer eqs.) |
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150 | !! |
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151 | !! ** Method : -1- Update forcings and data |
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152 | !! -2- Update ocean physics |
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153 | !! -3- Compute the t and s trends |
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154 | !! -4- Update t and s |
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155 | !! -5- Compute the momentum trends |
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156 | !! -6- Update the horizontal velocity |
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157 | !! -7- Compute the diagnostics variables (rd,N2, div,cur,w) |
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158 | !! -8- Outputs and diagnostics |
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159 | !!---------------------------------------------------------------------- |
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160 | INTEGER :: jk ! dummy loop indice |
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161 | INTEGER :: indic ! error indicator if < 0 |
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162 | !! --------------------------------------------------------------------- |
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163 | |
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164 | #if defined key_agrif |
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165 | kstp = nit000 + Agrif_Nb_Step() |
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166 | ! IF ( Agrif_Root() .and. lwp) Write(*,*) '---' |
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167 | ! IF (lwp) Write(*,*) 'Grid Number',Agrif_Fixed(),' time step ',kstp |
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168 | #endif |
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169 | indic = 1 ! reset to no error condition |
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170 | |
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171 | CALL day( kstp ) ! Calendar |
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172 | |
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173 | CALL iom_setkt( kstp ) ! say to iom that we are at time step kstp |
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174 | |
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175 | CALL rst_opn( kstp ) ! Open the restart file |
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176 | |
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177 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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178 | ! Update data, open boundaries, surface boundary condition (including sea-ice) |
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179 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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180 | IF( lk_dtatem ) CALL dta_tem( kstp ) ! update 3D temperature data |
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181 | IF( lk_dtasal ) CALL dta_sal( kstp ) ! update 3D salinity data |
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182 | CALL sbc ( kstp ) ! Sea Boundary Condition (including sea-ice) |
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183 | IF( lk_obc ) CALL obc_dta( kstp ) ! update dynamic and tracer data at open boundaries |
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184 | IF( lk_obc ) CALL obc_rad( kstp ) ! compute phase velocities at open boundaries |
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185 | IF( lk_bdy ) CALL bdy_dta( kstp ) ! update dynamic and tracer data at unstructured open boundary |
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186 | |
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187 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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188 | ! Ocean dynamics : ssh, wn, hdiv, rot ! |
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189 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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190 | CALL div_cur( kstp ) ! Horizontal divergence & Relative vorticity |
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191 | IF( n_cla == 1 ) CALL div_cla( kstp ) ! Cross Land Advection (Update Hor. divergence) |
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192 | CALL ssh_wzv( kstp ) ! after ssh & vertical velocity |
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193 | |
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194 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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195 | ! Ocean physics update (ua, va, ta, sa used as workspace) |
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196 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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197 | CALL bn2( tb, sb, rn2b ) ! before Brunt-Vaisala frequency |
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198 | CALL bn2( tn, sn, rn2 ) ! now Brunt-Vaisala frequency |
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199 | ! |
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200 | ! VERTICAL PHYSICS |
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201 | ! ! Vertical eddy viscosity and diffusivity coefficients |
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202 | IF( lk_zdfric ) CALL zdf_ric( kstp ) ! Richardson number dependent Kz |
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203 | IF( lk_zdftke ) CALL zdf_tke ( kstp ) ! TKE closure scheme for Kz |
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204 | IF( lk_zdftke2 ) CALL zdf_tke2( kstp ) ! TKE2 closure scheme for Kz |
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205 | IF( lk_zdfkpp ) CALL zdf_kpp( kstp ) ! KPP closure scheme for Kz |
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206 | IF( lk_zdfcst ) THEN ! Constant Kz (reset avt, avm[uv] to the background value) |
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207 | avt (:,:,:) = avt0 * tmask(:,:,:) |
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208 | avmu(:,:,:) = avm0 * umask(:,:,:) |
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209 | avmv(:,:,:) = avm0 * vmask(:,:,:) |
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210 | ENDIF |
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211 | IF( ln_rnf_mouth ) THEN ! increase diffusivity at rivers mouths |
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212 | DO jk = 2, nkrnf ; avt(:,:,jk) = avt(:,:,jk) + 2.e0 * rn_avt_rnf * rnfmsk(:,:) * tmask(:,:,jk) ; END DO |
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213 | ENDIF |
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214 | IF( ln_zdfevd ) CALL zdf_evd( kstp ) ! enhanced vertical eddy diffusivity |
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215 | |
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216 | IF( lk_zdftmx ) CALL zdf_tmx( kstp ) ! tidal vertical mixing |
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217 | |
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218 | IF( lk_zdfddm .AND. .NOT. lk_zdfkpp ) & |
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219 | & CALL zdf_ddm( kstp ) ! double diffusive mixing |
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220 | |
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221 | CALL zdf_bfr( kstp ) ! bottom friction |
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222 | |
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223 | CALL zdf_mxl( kstp ) ! mixed layer depth |
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224 | |
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225 | ! write tke2 information in the restart file |
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226 | IF( lrst_oce .AND. lk_zdftke2 ) CALL tke2_rst( kstp, 'WRITE' ) |
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227 | ! |
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228 | ! LATERAL PHYSICS |
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229 | ! |
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230 | IF( lk_ldfslp ) THEN ! slope of lateral mixing |
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231 | CALL eos( tb, sb, rhd, rhop ) ! before in situ density |
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232 | IF( ln_zps ) CALL zps_hde( kstp, tb, sb, rhd, & ! Partial steps: before horizontal gradient |
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233 | & gtu, gsu, gru, & ! of t, s, rd at the last ocean level |
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234 | & gtv, gsv, grv ) |
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235 | CALL ldf_slp( kstp, rhd, rn2b ) ! before slope of the lateral mixing |
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236 | ENDIF |
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237 | #if defined key_traldf_c2d |
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238 | IF( lk_traldf_eiv ) CALL ldf_eiv( kstp ) ! eddy induced velocity coefficient |
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239 | # endif |
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240 | |
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241 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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242 | ! diagnostics and outputs (ua, va, ta, sa used as workspace) |
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243 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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244 | CALL dia_wri( kstp, indic ) ! ocean model: outputs |
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245 | IF( lk_floats ) CALL flo_stp( kstp ) ! drifting Floats |
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246 | IF( lk_diahth ) CALL dia_hth( kstp ) ! Thermocline depth (20 degres isotherm depth) |
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247 | IF( lk_diagap ) CALL dia_gap( kstp ) ! basin averaged diagnostics |
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248 | IF( lk_diahdy ) CALL dia_hdy( kstp ) ! dynamical heigh diagnostics |
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249 | IF( lk_diafwb ) CALL dia_fwb( kstp ) ! Fresh water budget diagnostics |
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250 | IF( ln_diaptr ) CALL dia_ptr( kstp ) ! Poleward TRansports diagnostics |
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251 | |
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252 | #if defined key_top |
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253 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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254 | ! Passive Tracer Model |
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255 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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256 | CALL trc_stp( kstp ) ! time-stepping |
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257 | #endif |
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258 | |
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259 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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260 | ! Active tracers (ua, va used as workspace) |
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261 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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262 | ta(:,:,:) = 0.e0 ! set tracer trends to zero |
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263 | sa(:,:,:) = 0.e0 |
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264 | |
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265 | CALL tra_sbc ( kstp ) ! surface boundary condition |
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266 | IF( ln_traqsr ) CALL tra_qsr ( kstp ) ! penetrative solar radiation qsr |
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267 | IF( lk_trabbc ) CALL tra_bbc ( kstp ) ! bottom heat flux |
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268 | IF( lk_trabbl_dif ) CALL tra_bbl_dif( kstp ) ! diffusive bottom boundary layer scheme |
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269 | IF( lk_trabbl_adv ) CALL tra_bbl_adv( kstp ) ! advective (and/or diffusive) bottom boundary layer scheme |
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270 | IF( lk_tradmp ) CALL tra_dmp ( kstp ) ! internal damping trends |
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271 | CALL tra_adv ( kstp ) ! horizontal & vertical advection |
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272 | IF( n_cla == 1 ) CALL tra_cla ( kstp ) ! Cross Land Advection (Update Hor. advection) |
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273 | IF( lk_zdfkpp ) CALL tra_kpp ( kstp ) ! KPP non-local tracer fluxes |
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274 | CALL tra_ldf ( kstp ) ! lateral mixing |
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275 | #if defined key_agrif |
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276 | IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_tra ! tracers sponge |
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277 | #endif |
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278 | CALL tra_zdf ( kstp ) ! vertical mixing and after tracer fields |
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279 | |
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280 | IF( ln_dynhpg_imp ) THEN ! semi-implicit hpg (time stepping then eos) |
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281 | IF( ln_zdfnpc ) CALL tra_npc ( kstp ) ! update after fields by non-penetrative convection |
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282 | CALL tra_nxt ( kstp ) ! tracer fields at next time step |
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283 | CALL eos( ta, sa, rhd, rhop ) ! Time-filtered in situ density for hpg computation |
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284 | IF( ln_zps ) CALL zps_hde( kstp, ta, sa, rhd, & ! Partial steps: time filtered hor. derivative |
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285 | & gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level |
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286 | & gtv, gsv, grv ) |
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287 | |
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288 | ELSE ! centered hpg (eos then time stepping) |
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289 | CALL eos( tn, sn, rhd, rhop ) ! now in situ density for hpg computation |
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290 | IF( ln_zps ) CALL zps_hde( kstp, tn, sn, rhd, & ! Partial steps: now horizontal derivative |
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291 | & gtu, gsu, gru, & ! of t, s, rd at the bottom ocean level |
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292 | & gtv, gsv, grv ) |
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293 | IF( ln_zdfnpc ) CALL tra_npc ( kstp ) ! update after fields by non-penetrative convection |
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294 | CALL tra_nxt ( kstp ) ! tracer fields at next time step |
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295 | ENDIF |
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296 | |
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297 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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298 | ! Dynamics (ta, sa used as workspace) |
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299 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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300 | ua(:,:,:) = 0.e0 ! set dynamics trends to zero |
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301 | va(:,:,:) = 0.e0 |
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302 | |
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303 | CALL dyn_adv( kstp ) ! advection (vector or flux form) |
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304 | CALL dyn_vor( kstp ) ! vorticity term including Coriolis |
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305 | CALL dyn_ldf( kstp ) ! lateral mixing |
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306 | #if defined key_agrif |
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307 | IF(.NOT. Agrif_Root()) CALL Agrif_Sponge_dyn ! momemtum sponge |
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308 | #endif |
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309 | CALL dyn_hpg( kstp ) ! horizontal gradient of Hydrostatic pressure |
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310 | CALL dyn_zdf( kstp ) ! vertical diffusion |
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311 | indic=0 |
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312 | CALL dyn_spg( kstp, indic ) ! surface pressure gradient |
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313 | CALL dyn_nxt( kstp ) ! lateral velocity at next time step |
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314 | |
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315 | CALL ssh_nxt( kstp ) ! sea surface height at next time step |
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316 | |
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317 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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318 | ! Control and restarts |
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319 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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320 | CALL stp_ctl( kstp, indic ) |
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321 | IF( indic < 0 ) THEN |
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322 | CALL ctl_stop( 'step: indic < 0' ) |
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323 | CALL dia_wri_state( 'output.abort', kstp ) |
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324 | ENDIF |
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325 | IF( kstp == nit000 ) CALL iom_close( numror ) ! close input ocean restart file |
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326 | IF( lrst_oce ) CALL rst_write ( kstp ) ! write output ocean restart file |
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327 | IF( lk_obc ) CALL obc_rst_write( kstp ) ! write open boundary restart file |
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328 | |
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329 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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330 | ! Trends (ua, va, ta, sa used as workspace) |
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331 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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332 | IF( nstop == 0 ) THEN |
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333 | IF( lk_trddyn ) CALL trd_dwr( kstp ) ! trends: dynamics |
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334 | IF( lk_trdtra ) CALL trd_twr( kstp ) ! trends: active tracers |
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335 | IF( lk_trdmld ) CALL trd_mld( kstp ) ! trends: Mixed-layer |
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336 | IF( lk_trdvor ) CALL trd_vor( kstp ) ! trends: vorticity budget |
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337 | ENDIF |
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338 | |
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339 | !>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> |
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340 | ! Coupled mode |
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341 | !<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< |
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342 | IF( lk_cpl ) CALL sbc_cpl_snd( kstp ) ! coupled mode : field exchanges |
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343 | ! |
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344 | ! |
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345 | END SUBROUTINE stp |
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346 | |
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347 | !!====================================================================== |
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348 | END MODULE step |
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