1 | MODULE sshwzv |
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2 | !!============================================================================== |
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3 | !! *** MODULE sshwzv *** |
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4 | !! Ocean dynamics : sea surface height and vertical velocity |
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5 | !!============================================================================== |
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6 | !! History : 3.1 ! 2009-02 (G. Madec, M. Leclair) Original code |
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7 | !! 3.3 ! 2010-04 (M. Leclair, G. Madec) modified LF-RA |
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8 | !! - ! 2010-05 (K. Mogensen, A. Weaver, M. Martin, D. Lea) Assimilation interface |
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9 | !! - ! 2010-09 (D.Storkey and E.O'Dea) bug fixes for BDY module |
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10 | !! 3.3 ! 2011-10 (M. Leclair) split former ssh_wzv routine and remove all vvl related work |
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11 | !! 4.0 ! 2018-12 (A. Coward) add mixed implicit/explicit advection |
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12 | !! 4.1 ! 2019-08 (A. Coward, D. Storkey) Rename ssh_nxt -> ssh_atf. Now only does time filtering. |
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13 | !! - ! 2020-08 (S. Techene, G. Madec) add here ssh initiatlisation |
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14 | !!---------------------------------------------------------------------- |
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15 | |
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16 | !!---------------------------------------------------------------------- |
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17 | !! ssh_nxt : after ssh |
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18 | !! ssh_atf : time filter the ssh arrays |
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19 | !! wzv : generic interface of vertical velocity calculation |
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20 | !! wzv_MLF : MLF: compute NOW vertical velocity |
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21 | !! wzv_RK3 : RK3: Compute a vertical velocity |
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22 | !!---------------------------------------------------------------------- |
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23 | USE oce ! ocean dynamics and tracers variables |
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24 | USE isf_oce ! ice shelf |
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25 | USE dom_oce ! ocean space and time domain variables |
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26 | USE sbc_oce ! surface boundary condition: ocean |
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27 | USE domvvl ! Variable volume |
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28 | USE divhor ! horizontal divergence |
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29 | USE phycst ! physical constants |
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30 | USE bdy_oce , ONLY : ln_bdy, bdytmask ! Open BounDarY |
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31 | USE bdydyn2d ! bdy_ssh routine |
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32 | USE wet_dry ! Wetting/Drying flux limiting |
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33 | #if defined key_agrif |
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34 | USE agrif_oce |
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35 | USE agrif_oce_interp |
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36 | #endif |
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37 | ! |
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38 | USE iom |
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39 | USE in_out_manager ! I/O manager |
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40 | USE restart ! only for lrst_oce |
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41 | USE prtctl ! Print control |
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42 | USE lbclnk ! ocean lateral boundary condition (or mpp link) |
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43 | USE lib_mpp ! MPP library |
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44 | USE timing ! Timing |
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45 | |
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46 | IMPLICIT NONE |
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47 | PRIVATE |
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48 | ! !! * Interface |
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49 | INTERFACE wzv |
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50 | MODULE PROCEDURE wzv_MLF, wzv_RK3 |
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51 | END INTERFACE |
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52 | |
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53 | PUBLIC ssh_nxt ! called by step.F90 |
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54 | PUBLIC wzv ! called by step.F90 |
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55 | PUBLIC wAimp ! called by step.F90 |
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56 | PUBLIC ssh_atf ! called by step.F90 |
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57 | |
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58 | !! * Substitutions |
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59 | # include "do_loop_substitute.h90" |
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60 | # include "domzgr_substitute.h90" |
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61 | !!---------------------------------------------------------------------- |
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62 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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63 | !! $Id$ |
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64 | !! Software governed by the CeCILL license (see ./LICENSE) |
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65 | !!---------------------------------------------------------------------- |
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66 | CONTAINS |
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67 | |
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68 | SUBROUTINE ssh_nxt( kt, Kbb, Kmm, pssh, Kaa ) |
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69 | !!---------------------------------------------------------------------- |
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70 | !! *** ROUTINE ssh_nxt *** |
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71 | !! |
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72 | !! ** Purpose : compute the after ssh (ssh(Kaa)) |
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73 | !! |
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74 | !! ** Method : - Using the incompressibility hypothesis, the ssh increment |
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75 | !! is computed by integrating the horizontal divergence and multiply by |
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76 | !! by the time step. |
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77 | !! |
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78 | !! ** action : ssh(:,:,Kaa), after sea surface height |
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79 | !! |
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80 | !! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling. |
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81 | !!---------------------------------------------------------------------- |
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82 | INTEGER , INTENT(in ) :: kt ! time step |
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83 | INTEGER , INTENT(in ) :: Kbb, Kmm, Kaa ! time level index |
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84 | REAL(wp), DIMENSION(jpi,jpj,jpt), INTENT(inout) :: pssh ! sea-surface height |
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85 | ! |
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86 | INTEGER :: ji, jj, jk ! dummy loop index |
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87 | REAL(wp) :: zcoef ! local scalar |
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88 | REAL(wp), DIMENSION(jpi,jpj) :: zhdiv ! 2D workspace |
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89 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: z3d ! 3D workspace |
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90 | !!---------------------------------------------------------------------- |
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91 | ! |
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92 | IF( ln_timing ) CALL timing_start('ssh_nxt') |
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93 | ! |
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94 | IF( kt == nit000 ) THEN |
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95 | IF(lwp) WRITE(numout,*) |
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96 | IF(lwp) WRITE(numout,*) 'ssh_nxt : after sea surface height' |
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97 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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98 | ENDIF |
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99 | ! |
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100 | zcoef = 0.5_wp * r1_rho0 |
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101 | ! !------------------------------! |
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102 | ! ! After Sea Surface Height ! |
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103 | ! !------------------------------! |
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104 | IF(ln_wd_il) THEN |
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105 | CALL wad_lmt( pssh(:,:,Kbb), zcoef * (emp_b(:,:) + emp(:,:)), rDt, Kmm, uu, vv ) |
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106 | ENDIF |
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107 | |
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108 | CALL div_hor( kt, Kbb, Kmm ) ! Horizontal divergence |
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109 | ! |
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110 | zhdiv(:,:) = 0._wp |
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111 | DO_3D( 1, nn_hls, 1, nn_hls, 1, jpkm1 ) ! Horizontal divergence of barotropic transports |
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112 | zhdiv(ji,jj) = zhdiv(ji,jj) + e3t(ji,jj,jk,Kmm) * hdiv(ji,jj,jk) |
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113 | END_3D |
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114 | ! ! Sea surface elevation time stepping |
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115 | ! In time-split case we need a first guess of the ssh after (using the baroclinic timestep) in order to |
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116 | ! compute the vertical velocity which can be used to compute the non-linear terms of the momentum equations. |
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117 | ! |
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118 | DO_2D_OVR( 1, nn_hls, 1, nn_hls ) ! Loop bounds limited by hdiv definition in div_hor |
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119 | pssh(ji,jj,Kaa) = ( pssh(ji,jj,Kbb) - rDt * ( zcoef * ( emp_b(ji,jj) + emp(ji,jj) ) + zhdiv(ji,jj) ) ) * ssmask(ji,jj) |
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120 | END_2D |
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121 | ! pssh must be defined everywhere (true for dyn_spg_ts, not for dyn_spg_exp) |
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122 | IF ( .NOT. ln_dynspg_ts .AND. nn_hls == 2 ) CALL lbc_lnk( 'sshwzv', pssh(:,:,Kaa), 'T', 1.0_wp ) |
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123 | ! |
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124 | #if defined key_agrif |
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125 | Kbb_a = Kbb ; Kmm_a = Kmm ; Krhs_a = Kaa |
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126 | CALL agrif_ssh( kt ) |
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127 | #endif |
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128 | ! |
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129 | IF ( .NOT.ln_dynspg_ts ) THEN |
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130 | IF( ln_bdy ) THEN |
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131 | IF (nn_hls==1) CALL lbc_lnk( 'sshwzv', pssh(:,:,Kaa), 'T', 1.0_wp ) ! Not sure that's necessary |
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132 | CALL bdy_ssh( pssh(:,:,Kaa) ) ! Duplicate sea level across open boundaries |
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133 | ENDIF |
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134 | ENDIF |
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135 | ! !------------------------------! |
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136 | ! ! outputs ! |
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137 | ! !------------------------------! |
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138 | ! |
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139 | IF(sn_cfctl%l_prtctl) CALL prt_ctl( tab2d_1=pssh(:,:,Kaa), clinfo1=' pssh(:,:,Kaa) - : ', mask1=tmask ) |
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140 | ! |
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141 | IF( ln_timing ) CALL timing_stop('ssh_nxt') |
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142 | ! |
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143 | END SUBROUTINE ssh_nxt |
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144 | |
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145 | |
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146 | SUBROUTINE wzv_MLF( kt, Kbb, Kmm, Kaa, pww ) |
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147 | !!---------------------------------------------------------------------- |
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148 | !! *** ROUTINE wzv_MLF *** |
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149 | !! |
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150 | !! ** Purpose : compute the now vertical velocity |
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151 | !! |
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152 | !! ** Method : - Using the incompressibility hypothesis, the vertical |
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153 | !! velocity is computed by integrating the horizontal divergence |
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154 | !! from the bottom to the surface minus the scale factor evolution. |
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155 | !! The boundary conditions are w=0 at the bottom (no flux) and. |
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156 | !! |
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157 | !! ** action : pww : now vertical velocity |
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158 | !! |
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159 | !! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling. |
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160 | !!---------------------------------------------------------------------- |
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161 | INTEGER , INTENT(in) :: kt ! time step |
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162 | INTEGER , INTENT(in) :: Kbb, Kmm, Kaa ! time level indices |
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163 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pww ! vertical velocity at Kmm |
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164 | ! |
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165 | INTEGER :: ji, jj, jk ! dummy loop indices |
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166 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: zhdiv |
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167 | !!---------------------------------------------------------------------- |
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168 | ! |
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169 | IF( ln_timing ) CALL timing_start('wzv_MLF') |
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170 | ! |
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171 | IF( kt == nit000 ) THEN |
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172 | IF(lwp) WRITE(numout,*) |
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173 | IF(lwp) WRITE(numout,*) 'wzv_MLF : now vertical velocity ' |
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174 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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175 | ! |
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176 | pww(:,:,jpk) = 0._wp ! bottom boundary condition: w=0 (set once for all) |
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177 | ENDIF |
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178 | ! !------------------------------! |
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179 | ! ! Now Vertical Velocity ! |
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180 | ! !------------------------------! |
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181 | ! |
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182 | ! !===============================! |
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183 | IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN !== z_tilde and layer cases ==! |
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184 | ! !===============================! |
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185 | ALLOCATE( zhdiv(jpi,jpj,jpk) ) |
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186 | ! |
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187 | DO jk = 1, jpkm1 |
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188 | ! horizontal divergence of thickness diffusion transport ( velocity multiplied by e3t) |
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189 | ! - ML - note: computation already done in dom_vvl_sf_nxt. Could be optimized (not critical and clearer this way) |
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190 | DO_2D( nn_hls-1, nn_hls, nn_hls-1, nn_hls ) |
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191 | zhdiv(ji,jj,jk) = r1_e1e2t(ji,jj) * ( un_td(ji,jj,jk) - un_td(ji-1,jj,jk) + vn_td(ji,jj,jk) - vn_td(ji,jj-1,jk) ) |
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192 | END_2D |
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193 | END DO |
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194 | IF( nn_hls == 1) CALL lbc_lnk('sshwzv', zhdiv, 'T', 1.0_wp) ! - ML - Perhaps not necessary: not used for horizontal "connexions" |
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195 | ! ! Is it problematic to have a wrong vertical velocity in boundary cells? |
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196 | ! ! Same question holds for hdiv. Perhaps just for security |
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197 | ! ! clem: yes it is a problem because ww is used in many other places where we need the halos |
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198 | ! |
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199 | DO_3DS( nn_hls-1, nn_hls, nn_hls-1, nn_hls, jpkm1, 1, -1 ) ! integrate from the bottom the hor. divergence |
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200 | ! computation of w |
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201 | pww(ji,jj,jk) = pww(ji,jj,jk+1) - ( e3t(ji,jj,jk,Kmm) * hdiv(ji,jj,jk) & |
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202 | & + zhdiv(ji,jj,jk) & |
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203 | & + r1_Dt * ( e3t(ji,jj,jk,Kaa) & |
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204 | & - e3t(ji,jj,jk,Kbb) ) ) * tmask(ji,jj,jk) |
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205 | END_3D |
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206 | ! IF( ln_vvl_layer ) pww(:,:,:) = 0.e0 |
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207 | DEALLOCATE( zhdiv ) |
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208 | ! !=================================! |
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209 | ELSEIF( ln_linssh ) THEN !== linear free surface cases ==! |
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210 | ! !=================================! |
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211 | DO_3DS( nn_hls-1, nn_hls, nn_hls-1, nn_hls, jpkm1, 1, -1 ) ! integrate from the bottom the hor. divergence |
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212 | pww(ji,jj,jk) = pww(ji,jj,jk+1) - ( e3t(ji,jj,jk,Kmm) * hdiv(ji,jj,jk) ) * tmask(ji,jj,jk) |
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213 | END_3D |
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214 | ! !==========================================! |
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215 | ELSE !== Quasi-Eulerian vertical coordinate ==! ('key_qco') |
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216 | ! !==========================================! |
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217 | DO_3DS( nn_hls-1, nn_hls, nn_hls-1, nn_hls, jpkm1, 1, -1 ) ! integrate from the bottom the hor. divergence |
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218 | #if defined key_qco |
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219 | !!gm slightly faster |
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220 | pww(ji,jj,jk) = pww(ji,jj,jk+1) - ( e3t(ji,jj,jk,Kmm) * hdiv(ji,jj,jk) & |
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221 | & + r1_Dt * e3t_0(ji,jj,jk) * ( r3t(ji,jj,Kaa) - r3t(ji,jj,Kbb) ) ) * tmask(ji,jj,jk) |
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222 | #else |
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223 | pww(ji,jj,jk) = pww(ji,jj,jk+1) - ( e3t(ji,jj,jk,Kmm) * hdiv(ji,jj,jk) & |
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224 | & + r1_Dt * ( e3t(ji,jj,jk,Kaa) & |
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225 | & - e3t(ji,jj,jk,Kbb) ) ) * tmask(ji,jj,jk) |
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226 | #endif |
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227 | END_3D |
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228 | ENDIF |
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229 | |
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230 | IF( ln_bdy ) THEN |
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231 | DO jk = 1, jpkm1 |
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232 | DO_2D( nn_hls-1, nn_hls, nn_hls-1, nn_hls ) |
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233 | pww(ji,jj,jk) = pww(ji,jj,jk) * bdytmask(ji,jj) |
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234 | END_2D |
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235 | END DO |
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236 | ENDIF |
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237 | ! |
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238 | #if defined key_agrif |
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239 | IF( .NOT. AGRIF_Root() ) THEN |
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240 | ! |
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241 | ! Mask vertical velocity at first/last columns/row |
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242 | ! inside computational domain (cosmetic) |
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243 | DO jk = 1, jpkm1 |
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244 | IF( lk_west ) THEN ! --- West --- ! |
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245 | DO ji = mi0(2+nn_hls), mi1(2+nn_hls) |
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246 | DO jj = 1, jpj |
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247 | pww(ji,jj,jk) = 0._wp |
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248 | END DO |
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249 | END DO |
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250 | ENDIF |
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251 | IF( lk_east ) THEN ! --- East --- ! |
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252 | DO ji = mi0(jpiglo-1-nn_hls), mi1(jpiglo-1-nn_hls) |
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253 | DO jj = 1, jpj |
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254 | pww(ji,jj,jk) = 0._wp |
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255 | END DO |
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256 | END DO |
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257 | ENDIF |
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258 | IF( lk_south ) THEN ! --- South --- ! |
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259 | DO jj = mj0(2+nn_hls), mj1(2+nn_hls) |
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260 | DO ji = 1, jpi |
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261 | pww(ji,jj,jk) = 0._wp |
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262 | END DO |
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263 | END DO |
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264 | ENDIF |
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265 | IF( lk_north ) THEN ! --- North --- ! |
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266 | DO jj = mj0(jpjglo-1-nn_hls), mj1(jpjglo-1-nn_hls) |
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267 | DO ji = 1, jpi |
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268 | pww(ji,jj,jk) = 0._wp |
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269 | END DO |
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270 | END DO |
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271 | ENDIF |
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272 | ! |
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273 | END DO |
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274 | ! |
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275 | ENDIF |
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276 | #endif |
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277 | ! |
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278 | IF( ln_timing ) CALL timing_stop('wzv_MLF') |
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279 | ! |
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280 | END SUBROUTINE wzv_MLF |
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281 | |
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282 | |
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283 | SUBROUTINE wzv_RK3( kt, Kbb, Kmm, Kaa, puu, pvv, pww ) |
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284 | !!---------------------------------------------------------------------- |
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285 | !! *** ROUTINE wzv_RK3 *** |
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286 | !! |
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287 | !! ** Purpose : compute the now vertical velocity |
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288 | !! |
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289 | !! ** Method : - Using the incompressibility hypothesis, the vertical |
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290 | !! velocity is computed by integrating the horizontal divergence |
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291 | !! from the bottom to the surface minus the scale factor evolution. |
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292 | !! The boundary conditions are w=0 at the bottom (no flux) and. |
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293 | !! |
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294 | !! ** action : pww : now vertical velocity |
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295 | !! |
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296 | !! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling. |
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297 | !!---------------------------------------------------------------------- |
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298 | INTEGER , INTENT(in ) :: kt ! time step |
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299 | INTEGER , INTENT(in ) :: Kbb, Kmm, Kaa ! time level indices |
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300 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(in ) :: puu, pvv ! horizontal velocity at Kmm |
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301 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT(inout) :: pww ! vertical velocity at Kmm |
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302 | ! |
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303 | INTEGER :: ji, jj, jk ! dummy loop indices |
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304 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: zhdiv |
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305 | REAL(wp) , DIMENSION(jpi,jpj,jpk) :: ze3div |
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306 | !!---------------------------------------------------------------------- |
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307 | ! |
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308 | IF( ln_timing ) CALL timing_start('wzv_RK3') |
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309 | ! |
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310 | IF( kt == nit000 ) THEN |
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311 | IF(lwp) WRITE(numout,*) |
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312 | IF(lwp) WRITE(numout,*) 'wzv_RK3 : now vertical velocity ' |
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313 | IF(lwp) WRITE(numout,*) '~~~~~ ' |
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314 | ! |
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315 | pww(:,:,jpk) = 0._wp ! bottom boundary condition: w=0 (set once for all) |
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316 | ENDIF |
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317 | ! |
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318 | CALL div_hor( kt, Kbb, Kmm, puu, pvv, ze3div ) |
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319 | ! !------------------------------! |
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320 | ! ! Now Vertical Velocity ! |
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321 | ! !------------------------------! |
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322 | ! |
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323 | ! !===============================! |
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324 | IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN !== z_tilde and layer cases ==! |
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325 | ! !===============================! |
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326 | ALLOCATE( zhdiv(jpi,jpj,jpk) ) |
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327 | ! |
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328 | DO jk = 1, jpkm1 |
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329 | ! horizontal divergence of thickness diffusion transport ( velocity multiplied by e3t) |
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330 | ! - ML - note: computation already done in dom_vvl_sf_nxt. Could be optimized (not critical and clearer this way) |
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331 | DO_2D( nn_hls-1, nn_hls, nn_hls-1, nn_hls ) |
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332 | zhdiv(ji,jj,jk) = r1_e1e2t(ji,jj) * ( un_td(ji,jj,jk) - un_td(ji-1,jj,jk) + vn_td(ji,jj,jk) - vn_td(ji,jj-1,jk) ) |
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333 | END_2D |
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334 | END DO |
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335 | IF( nn_hls == 1) CALL lbc_lnk('sshwzv', zhdiv, 'T', 1.0_wp) ! - ML - Perhaps not necessary: not used for horizontal "connexions" |
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336 | ! ! Is it problematic to have a wrong vertical velocity in boundary cells? |
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337 | ! ! Same question holds for hdiv. Perhaps just for security |
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338 | DO_3DS( nn_hls-1, nn_hls, nn_hls-1, nn_hls, jpkm1, 1, -1 ) ! integrate from the bottom the hor. divergence |
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339 | pww(ji,jj,jk) = pww(ji,jj,jk+1) - ( ze3div(ji,jj,jk) + zhdiv(ji,jj,jk) & |
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340 | & + r1_Dt * ( e3t(ji,jj,jk,Kaa) & |
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341 | & - e3t(ji,jj,jk,Kbb) ) ) * tmask(ji,jj,jk) |
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342 | END_3D |
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343 | ! |
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344 | DEALLOCATE( zhdiv ) |
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345 | ! !=================================! |
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346 | ELSEIF( ln_linssh ) THEN !== linear free surface cases ==! |
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347 | ! !=================================! |
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348 | DO_3DS( nn_hls-1, nn_hls, nn_hls-1, nn_hls, jpkm1, 1, -1 ) ! integrate from the bottom the hor. divergence |
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349 | pww(ji,jj,jk) = pww(ji,jj,jk+1) - ze3div(ji,jj,jk) |
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350 | END_3D |
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351 | ! !==========================================! |
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352 | ELSE !== Quasi-Eulerian vertical coordinate ==! ('key_qco') |
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353 | ! !==========================================! |
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354 | DO_3DS( nn_hls-1, nn_hls, nn_hls-1, nn_hls, jpkm1, 1, -1 ) ! integrate from the bottom the hor. divergence |
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355 | ! ! NB: [e3t[a] -e3t[b] ]=e3t_0*[r3t[a]-r3t[b]] |
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356 | pww(ji,jj,jk) = pww(ji,jj,jk+1) - ( ze3div(ji,jj,jk) & |
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357 | & + r1_Dt * e3t_0(ji,jj,jk) * ( r3t(ji,jj,Kaa) - r3t(ji,jj,Kbb) ) ) * tmask(ji,jj,jk) |
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358 | END_3D |
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359 | ENDIF |
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360 | |
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361 | IF( ln_bdy ) THEN |
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362 | DO jk = 1, jpkm1 |
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363 | DO_2D( nn_hls-1, nn_hls, nn_hls-1, nn_hls ) |
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364 | pww(ji,jj,jk) = pww(ji,jj,jk) * bdytmask(ji,jj) |
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365 | END_2D |
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366 | END DO |
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367 | ENDIF |
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368 | ! |
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369 | #if defined key_agrif |
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370 | IF( .NOT. AGRIF_Root() ) THEN |
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371 | ! |
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372 | ! Mask vertical velocity at first/last columns/row |
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373 | ! inside computational domain (cosmetic) |
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374 | DO jk = 1, jpkm1 |
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375 | IF( lk_west ) THEN ! --- West --- ! |
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376 | DO ji = mi0(2+nn_hls), mi1(2+nn_hls) |
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377 | DO jj = 1, jpj |
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378 | pww(ji,jj,jk) = 0._wp |
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379 | END DO |
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380 | END DO |
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381 | ENDIF |
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382 | IF( lk_east ) THEN ! --- East --- ! |
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383 | DO ji = mi0(jpiglo-1-nn_hls), mi1(jpiglo-1-nn_hls) |
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384 | DO jj = 1, jpj |
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385 | pww(ji,jj,jk) = 0._wp |
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386 | END DO |
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387 | END DO |
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388 | ENDIF |
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389 | IF( lk_south ) THEN ! --- South --- ! |
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390 | DO jj = mj0(2+nn_hls), mj1(2+nn_hls) |
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391 | DO ji = 1, jpi |
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392 | pww(ji,jj,jk) = 0._wp |
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393 | END DO |
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394 | END DO |
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395 | ENDIF |
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396 | IF( lk_north ) THEN ! --- North --- ! |
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397 | DO jj = mj0(jpjglo-1-nn_hls), mj1(jpjglo-1-nn_hls) |
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398 | DO ji = 1, jpi |
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399 | pww(ji,jj,jk) = 0._wp |
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400 | END DO |
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401 | END DO |
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402 | ENDIF |
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403 | ! |
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404 | END DO |
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405 | ! |
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406 | ENDIF |
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407 | #endif |
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408 | ! |
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409 | IF( ln_timing ) CALL timing_stop('wzv_RK3') |
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410 | ! |
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411 | END SUBROUTINE wzv_RK3 |
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412 | |
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413 | |
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414 | SUBROUTINE ssh_atf( kt, Kbb, Kmm, Kaa, pssh ) |
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415 | !!---------------------------------------------------------------------- |
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416 | !! *** ROUTINE ssh_atf *** |
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417 | !! |
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418 | !! ** Purpose : Apply Asselin time filter to now SSH. |
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419 | !! |
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420 | !! ** Method : - apply Asselin time fiter to now ssh (excluding the forcing |
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421 | !! from the filter, see Leclair and Madec 2010) and swap : |
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422 | !! pssh(:,:,Kmm) = pssh(:,:,Kaa) + rn_atfp * ( pssh(:,:,Kbb) -2 pssh(:,:,Kmm) + pssh(:,:,Kaa) ) |
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423 | !! - rn_atfp * rn_Dt * ( emp_b - emp ) / rho0 |
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424 | !! |
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425 | !! ** action : - pssh(:,:,Kmm) time filtered |
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426 | !! |
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427 | !! Reference : Leclair, M., and G. Madec, 2009, Ocean Modelling. |
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428 | !!---------------------------------------------------------------------- |
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429 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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430 | INTEGER , INTENT(in ) :: Kbb, Kmm, Kaa ! ocean time level indices |
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431 | REAL(wp), DIMENSION(jpi,jpj,jpt), INTENT(inout) :: pssh ! SSH field |
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432 | ! |
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433 | REAL(wp) :: zcoef ! local scalar |
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434 | !!---------------------------------------------------------------------- |
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435 | ! |
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436 | IF( ln_timing ) CALL timing_start('ssh_atf') |
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437 | ! |
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438 | IF( kt == nit000 ) THEN |
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439 | IF(lwp) WRITE(numout,*) |
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440 | IF(lwp) WRITE(numout,*) 'ssh_atf : Asselin time filter of sea surface height' |
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441 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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442 | ENDIF |
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443 | ! |
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444 | IF( .NOT.l_1st_euler ) THEN ! Apply Asselin time filter on Kmm field (not on euler 1st) |
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445 | ! |
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446 | IF( ln_linssh ) THEN ! filtered "now" field |
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447 | pssh(:,:,Kmm) = pssh(:,:,Kmm) + rn_atfp * ( pssh(:,:,Kbb) - 2 * pssh(:,:,Kmm) + pssh(:,:,Kaa) ) |
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448 | ! |
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449 | ELSE ! filtered "now" field with forcing removed |
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450 | zcoef = rn_atfp * rn_Dt * r1_rho0 |
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451 | pssh(:,:,Kmm) = pssh(:,:,Kmm) + rn_atfp * ( pssh(:,:,Kbb) - 2 * pssh(:,:,Kmm) + pssh(:,:,Kaa) ) & |
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452 | & - zcoef * ( emp_b(:,:) - emp(:,:) & |
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453 | & - rnf_b(:,:) + rnf(:,:) & |
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454 | & - fwfisf_cav_b(:,:) + fwfisf_cav(:,:) & |
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455 | & - fwfisf_par_b(:,:) + fwfisf_par(:,:) ) * ssmask(:,:) |
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456 | |
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457 | ! ice sheet coupling |
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458 | IF( ln_isf .AND. ln_isfcpl .AND. kt == nit000+1 ) & |
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459 | & pssh(:,:,Kbb) = pssh(:,:,Kbb) - rn_atfp * rn_Dt * ( risfcpl_ssh(:,:) - 0._wp ) * ssmask(:,:) |
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460 | |
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461 | ENDIF |
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462 | ENDIF |
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463 | ! |
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464 | IF(sn_cfctl%l_prtctl) CALL prt_ctl( tab2d_1=pssh(:,:,Kmm), clinfo1=' atf - pssh(:,:,Kmm): ', mask1=tmask ) |
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465 | ! |
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466 | IF( ln_timing ) CALL timing_stop('ssh_atf') |
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467 | ! |
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468 | END SUBROUTINE ssh_atf |
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469 | |
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470 | |
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471 | SUBROUTINE wAimp( kt, Kmm ) |
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472 | !!---------------------------------------------------------------------- |
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473 | !! *** ROUTINE wAimp *** |
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474 | !! |
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475 | !! ** Purpose : compute the Courant number and partition vertical velocity |
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476 | !! if a proportion needs to be treated implicitly |
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477 | !! |
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478 | !! ** Method : - |
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479 | !! |
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480 | !! ** action : ww : now vertical velocity (to be handled explicitly) |
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481 | !! : wi : now vertical velocity (for implicit treatment) |
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482 | !! |
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483 | !! Reference : Shchepetkin, A. F. (2015): An adaptive, Courant-number-dependent |
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484 | !! implicit scheme for vertical advection in oceanic modeling. |
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485 | !! Ocean Modelling, 91, 38-69. |
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486 | !!---------------------------------------------------------------------- |
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487 | INTEGER, INTENT(in) :: kt ! time step |
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488 | INTEGER, INTENT(in) :: Kmm ! time level index |
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489 | ! |
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490 | INTEGER :: ji, jj, jk ! dummy loop indices |
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491 | REAL(wp) :: zCu, zcff, z1_e3t, zdt ! local scalars |
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492 | REAL(wp) , PARAMETER :: Cu_min = 0.15_wp ! local parameters |
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493 | REAL(wp) , PARAMETER :: Cu_max = 0.30_wp ! local parameters |
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494 | REAL(wp) , PARAMETER :: Cu_cut = 2._wp*Cu_max - Cu_min ! local parameters |
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495 | REAL(wp) , PARAMETER :: Fcu = 4._wp*Cu_max*(Cu_max-Cu_min) ! local parameters |
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496 | !!---------------------------------------------------------------------- |
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497 | ! |
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498 | IF( ln_timing ) CALL timing_start('wAimp') |
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499 | ! |
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500 | IF( kt == nit000 ) THEN |
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501 | IF(lwp) WRITE(numout,*) |
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502 | IF(lwp) WRITE(numout,*) 'wAimp : Courant number-based partitioning of now vertical velocity ' |
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503 | IF(lwp) WRITE(numout,*) '~~~~~ ' |
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504 | ENDIF |
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505 | ! |
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506 | ! Calculate Courant numbers |
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507 | zdt = 2._wp * rn_Dt ! 2*rn_Dt and not rDt (for restartability) |
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508 | IF( ln_vvl_ztilde .OR. ln_vvl_layer ) THEN |
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509 | DO_3D( nn_hls-1, nn_hls, nn_hls-1, nn_hls, 1, jpkm1 ) |
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510 | z1_e3t = 1._wp / e3t(ji,jj,jk,Kmm) |
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511 | Cu_adv(ji,jj,jk) = zdt * & |
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512 | & ( ( MAX( ww(ji,jj,jk) , 0._wp ) - MIN( ww(ji,jj,jk+1) , 0._wp ) ) & |
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513 | & + ( MAX( e2u(ji ,jj) * e3u(ji ,jj,jk,Kmm) & |
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514 | & * uu (ji ,jj,jk,Kmm) + un_td(ji ,jj,jk), 0._wp ) - & |
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515 | & MIN( e2u(ji-1,jj) * e3u(ji-1,jj,jk,Kmm) & |
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516 | & * uu (ji-1,jj,jk,Kmm) + un_td(ji-1,jj,jk), 0._wp ) ) & |
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517 | & * r1_e1e2t(ji,jj) & |
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518 | & + ( MAX( e1v(ji,jj ) * e3v(ji,jj ,jk,Kmm) & |
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519 | & * vv (ji,jj ,jk,Kmm) + vn_td(ji,jj ,jk), 0._wp ) - & |
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520 | & MIN( e1v(ji,jj-1) * e3v(ji,jj-1,jk,Kmm) & |
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521 | & * vv (ji,jj-1,jk,Kmm) + vn_td(ji,jj-1,jk), 0._wp ) ) & |
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522 | & * r1_e1e2t(ji,jj) & |
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523 | & ) * z1_e3t |
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524 | END_3D |
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525 | ELSE |
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526 | DO_3D( nn_hls-1, nn_hls, nn_hls-1, nn_hls, 1, jpkm1 ) |
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527 | z1_e3t = 1._wp / e3t(ji,jj,jk,Kmm) |
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528 | Cu_adv(ji,jj,jk) = zdt * & |
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529 | & ( ( MAX( ww(ji,jj,jk) , 0._wp ) - MIN( ww(ji,jj,jk+1) , 0._wp ) ) & |
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530 | & + ( MAX( e2u(ji ,jj)*e3u(ji ,jj,jk,Kmm)*uu(ji ,jj,jk,Kmm), 0._wp ) - & |
---|
531 | & MIN( e2u(ji-1,jj)*e3u(ji-1,jj,jk,Kmm)*uu(ji-1,jj,jk,Kmm), 0._wp ) ) & |
---|
532 | & * r1_e1e2t(ji,jj) & |
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533 | & + ( MAX( e1v(ji,jj )*e3v(ji,jj ,jk,Kmm)*vv(ji,jj ,jk,Kmm), 0._wp ) - & |
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534 | & MIN( e1v(ji,jj-1)*e3v(ji,jj-1,jk,Kmm)*vv(ji,jj-1,jk,Kmm), 0._wp ) ) & |
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535 | & * r1_e1e2t(ji,jj) & |
---|
536 | & ) * z1_e3t |
---|
537 | END_3D |
---|
538 | ENDIF |
---|
539 | CALL iom_put("Courant",Cu_adv) |
---|
540 | ! |
---|
541 | IF( MAXVAL( Cu_adv(:,:,:) ) > Cu_min ) THEN ! Quick check if any breaches anywhere |
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542 | DO_3DS( nn_hls-1, nn_hls, nn_hls-1, nn_hls, jpkm1, 2, -1 ) ! or scan Courant criterion and partition ! w where necessary |
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543 | ! |
---|
544 | zCu = MAX( Cu_adv(ji,jj,jk) , Cu_adv(ji,jj,jk-1) ) |
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545 | ! alt: |
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546 | ! IF ( ww(ji,jj,jk) > 0._wp ) THEN |
---|
547 | ! zCu = Cu_adv(ji,jj,jk) |
---|
548 | ! ELSE |
---|
549 | ! zCu = Cu_adv(ji,jj,jk-1) |
---|
550 | ! ENDIF |
---|
551 | ! |
---|
552 | IF( zCu <= Cu_min ) THEN !<-- Fully explicit |
---|
553 | zcff = 0._wp |
---|
554 | ELSEIF( zCu < Cu_cut ) THEN !<-- Mixed explicit |
---|
555 | zcff = ( zCu - Cu_min )**2 |
---|
556 | zcff = zcff / ( Fcu + zcff ) |
---|
557 | ELSE !<-- Mostly implicit |
---|
558 | zcff = ( zCu - Cu_max )/ zCu |
---|
559 | ENDIF |
---|
560 | zcff = MIN(1._wp, zcff) |
---|
561 | ! |
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562 | wi(ji,jj,jk) = zcff * ww(ji,jj,jk) |
---|
563 | ww(ji,jj,jk) = ( 1._wp - zcff ) * ww(ji,jj,jk) |
---|
564 | ! |
---|
565 | Cu_adv(ji,jj,jk) = zcff ! Reuse array to output coefficient below and in stp_ctl |
---|
566 | END_3D |
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567 | Cu_adv(:,:,1) = 0._wp |
---|
568 | ELSE |
---|
569 | ! Fully explicit everywhere |
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570 | Cu_adv(:,:,:) = 0._wp ! Reuse array to output coefficient below and in stp_ctl |
---|
571 | wi (:,:,:) = 0._wp |
---|
572 | ENDIF |
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573 | CALL iom_put("wimp",wi) |
---|
574 | CALL iom_put("wi_cff",Cu_adv) |
---|
575 | CALL iom_put("wexp",ww) |
---|
576 | ! |
---|
577 | IF( ln_timing ) CALL timing_stop('wAimp') |
---|
578 | ! |
---|
579 | END SUBROUTINE wAimp |
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580 | |
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581 | !!====================================================================== |
---|
582 | END MODULE sshwzv |
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