1 | MODULE traadv_fct |
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2 | !!============================================================================== |
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3 | !! *** MODULE traadv_fct *** |
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4 | !! Ocean tracers: horizontal & vertical advective trend (2nd/4th order Flux Corrected Transport method) |
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5 | !!============================================================================== |
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6 | !! History : 3.7 ! 2015-09 (L. Debreu, G. Madec) original code (inspired from traadv_tvd.F90) |
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7 | !!---------------------------------------------------------------------- |
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8 | |
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9 | !!---------------------------------------------------------------------- |
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10 | !! tra_adv_fct : update the tracer trend with a 3D advective trends using a 2nd or 4th order FCT scheme |
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11 | !! tra_adv_fct_zts: update the tracer trend with a 3D advective trends using a 2nd order FCT scheme |
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12 | !! with sub-time-stepping in the vertical direction |
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13 | !! nonosc : compute monotonic tracer fluxes by a non-oscillatory algorithm |
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14 | !! interp_4th_cpt : 4th order compact scheme for the vertical component of the advection |
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15 | !!---------------------------------------------------------------------- |
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16 | USE oce ! ocean dynamics and active tracers |
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17 | USE dom_oce ! ocean space and time domain |
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18 | USE trc_oce ! share passive tracers/Ocean variables |
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19 | USE trd_oce ! trends: ocean variables |
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20 | USE trdtra ! tracers trends |
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21 | USE diaptr ! poleward transport diagnostics |
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22 | USE diaar5 ! AR5 diagnostics |
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23 | USE phycst, ONLY: rau0_rcp |
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24 | ! |
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25 | USE in_out_manager ! I/O manager |
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26 | USE iom |
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27 | USE lib_mpp ! MPP library |
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28 | USE lbclnk ! ocean lateral boundary condition (or mpp link) |
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29 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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30 | USE wrk_nemo ! Memory Allocation |
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31 | USE timing ! Timing |
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32 | |
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33 | IMPLICIT NONE |
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34 | PRIVATE |
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35 | |
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36 | PUBLIC tra_adv_fct ! routine called by traadv.F90 |
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37 | PUBLIC tra_adv_fct_zts ! routine called by traadv.F90 |
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38 | PUBLIC interp_4th_cpt ! routine called by traadv_cen.F90 |
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39 | |
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40 | LOGICAL :: l_trd ! flag to compute trends |
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41 | LOGICAL :: l_ptr ! flag to compute poleward transport |
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42 | LOGICAL :: l_hst ! flag to compute heat/salt transport |
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43 | REAL(wp) :: r1_6 = 1._wp / 6._wp ! =1/6 |
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44 | |
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45 | ! ! tridiag solver associated indices: |
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46 | INTEGER, PARAMETER :: np_NH = 0 ! Neumann homogeneous boundary condition |
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47 | INTEGER, PARAMETER :: np_CEN2 = 1 ! 2nd order centered boundary condition |
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48 | |
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49 | !! * Substitutions |
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50 | # include "vectopt_loop_substitute.h90" |
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51 | !!---------------------------------------------------------------------- |
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52 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
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53 | !! $Id$ |
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54 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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55 | !!---------------------------------------------------------------------- |
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56 | CONTAINS |
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57 | |
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58 | SUBROUTINE tra_adv_fct( kt, kit000, cdtype, p2dt, pun, pvn, pwn, & |
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59 | & ptb, ptn, pta, kjpt, kn_fct_h, kn_fct_v ) |
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60 | !!---------------------------------------------------------------------- |
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61 | !! *** ROUTINE tra_adv_fct *** |
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62 | !! |
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63 | !! ** Purpose : Compute the now trend due to total advection of tracers |
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64 | !! and add it to the general trend of tracer equations |
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65 | !! |
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66 | !! ** Method : - 2nd or 4th FCT scheme on the horizontal direction |
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67 | !! (choice through the value of kn_fct) |
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68 | !! - on the vertical the 4th order is a compact scheme |
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69 | !! - corrected flux (monotonic correction) |
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70 | !! |
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71 | !! ** Action : - update pta with the now advective tracer trends |
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72 | !! - send trends to trdtra module for further diagnostcs (l_trdtra=T) |
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73 | !! - htr_adv, str_adv : poleward advective heat and salt transport (ln_diaptr=T) |
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74 | !!---------------------------------------------------------------------- |
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75 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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76 | INTEGER , INTENT(in ) :: kit000 ! first time step index |
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77 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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78 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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79 | INTEGER , INTENT(in ) :: kn_fct_h ! order of the FCT scheme (=2 or 4) |
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80 | INTEGER , INTENT(in ) :: kn_fct_v ! order of the FCT scheme (=2 or 4) |
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81 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
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82 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pun, pvn, pwn ! 3 ocean velocity components |
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83 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb, ptn ! before and now tracer fields |
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84 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend |
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85 | ! |
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86 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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87 | REAL(wp) :: ztra ! local scalar |
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88 | REAL(wp) :: zfp_ui, zfp_vj, zfp_wk, zC2t_u, zC4t_u ! - - |
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89 | REAL(wp) :: zfm_ui, zfm_vj, zfm_wk, zC2t_v, zC4t_v ! - - |
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90 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zwi, zwx, zwy, zwz, ztu, ztv, zltu, zltv, ztw |
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91 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdx, ztrdy, ztrdz, zptry |
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92 | REAL(wp), POINTER, DIMENSION(:,:) :: z2d |
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93 | !!---------------------------------------------------------------------- |
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94 | ! |
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95 | IF( nn_timing == 1 ) CALL timing_start('tra_adv_fct') |
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96 | ! |
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97 | CALL wrk_alloc( jpi,jpj,jpk, zwi, zwx, zwy, zwz, ztu, ztv, zltu, zltv, ztw ) |
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98 | ! |
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99 | IF( kt == kit000 ) THEN |
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100 | IF(lwp) WRITE(numout,*) |
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101 | IF(lwp) WRITE(numout,*) 'tra_adv_fct : FCT advection scheme on ', cdtype |
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102 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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103 | ENDIF |
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104 | ! |
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105 | l_trd = .FALSE. |
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106 | l_hst = .FALSE. |
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107 | l_ptr = .FALSE. |
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108 | IF( ( cdtype == 'TRA' .AND. l_trdtra ) .OR. ( cdtype == 'TRC' .AND. l_trdtrc ) ) l_trd = .TRUE. |
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109 | IF( cdtype == 'TRA' .AND. ln_diaptr ) l_ptr = .TRUE. |
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110 | IF( cdtype == 'TRA' .AND. ( iom_use("uadv_heattr") .OR. iom_use("vadv_heattr") .OR. & |
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111 | & iom_use("uadv_salttr") .OR. iom_use("vadv_salttr") ) ) l_hst = .TRUE. |
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112 | ! |
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113 | IF( l_trd .OR. l_hst ) THEN |
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114 | CALL wrk_alloc( jpi, jpj, jpk, ztrdx, ztrdy, ztrdz ) |
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115 | ztrdx(:,:,:) = 0._wp ; ztrdy(:,:,:) = 0._wp ; ztrdz(:,:,:) = 0._wp |
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116 | ENDIF |
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117 | ! |
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118 | IF( l_ptr ) THEN |
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119 | CALL wrk_alloc( jpi, jpj, jpk, zptry ) |
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120 | zptry(:,:,:) = 0._wp |
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121 | ENDIF |
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122 | ! ! surface & bottom value : flux set to zero one for all |
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123 | zwz(:,:, 1 ) = 0._wp |
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124 | zwx(:,:,jpk) = 0._wp ; zwy(:,:,jpk) = 0._wp ; zwz(:,:,jpk) = 0._wp |
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125 | ! |
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126 | zwi(:,:,:) = 0._wp |
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127 | ! |
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128 | DO jn = 1, kjpt !== loop over the tracers ==! |
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129 | ! |
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130 | ! !== upstream advection with initial mass fluxes & intermediate update ==! |
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131 | ! !* upstream tracer flux in the i and j direction |
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132 | DO jk = 1, jpkm1 |
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133 | DO jj = 1, jpjm1 |
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134 | DO ji = 1, fs_jpim1 ! vector opt. |
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135 | ! upstream scheme |
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136 | zfp_ui = pun(ji,jj,jk) + ABS( pun(ji,jj,jk) ) |
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137 | zfm_ui = pun(ji,jj,jk) - ABS( pun(ji,jj,jk) ) |
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138 | zfp_vj = pvn(ji,jj,jk) + ABS( pvn(ji,jj,jk) ) |
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139 | zfm_vj = pvn(ji,jj,jk) - ABS( pvn(ji,jj,jk) ) |
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140 | zwx(ji,jj,jk) = 0.5 * ( zfp_ui * ptb(ji,jj,jk,jn) + zfm_ui * ptb(ji+1,jj ,jk,jn) ) |
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141 | zwy(ji,jj,jk) = 0.5 * ( zfp_vj * ptb(ji,jj,jk,jn) + zfm_vj * ptb(ji ,jj+1,jk,jn) ) |
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142 | END DO |
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143 | END DO |
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144 | END DO |
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145 | ! !* upstream tracer flux in the k direction *! |
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146 | DO jk = 2, jpkm1 ! Interior value ( multiplied by wmask) |
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147 | DO jj = 1, jpj |
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148 | DO ji = 1, jpi |
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149 | zfp_wk = pwn(ji,jj,jk) + ABS( pwn(ji,jj,jk) ) |
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150 | zfm_wk = pwn(ji,jj,jk) - ABS( pwn(ji,jj,jk) ) |
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151 | zwz(ji,jj,jk) = 0.5 * ( zfp_wk * ptb(ji,jj,jk,jn) + zfm_wk * ptb(ji,jj,jk-1,jn) ) * wmask(ji,jj,jk) |
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152 | END DO |
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153 | END DO |
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154 | END DO |
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155 | IF( ln_linssh ) THEN ! top ocean value (only in linear free surface as zwz has been w-masked) |
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156 | IF( ln_isfcav ) THEN ! top of the ice-shelf cavities and at the ocean surface |
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157 | DO jj = 1, jpj |
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158 | DO ji = 1, jpi |
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159 | zwz(ji,jj, mikt(ji,jj) ) = pwn(ji,jj,mikt(ji,jj)) * ptb(ji,jj,mikt(ji,jj),jn) ! linear free surface |
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160 | END DO |
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161 | END DO |
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162 | ELSE ! no cavities: only at the ocean surface |
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163 | zwz(:,:,1) = pwn(:,:,1) * ptb(:,:,1,jn) |
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164 | ENDIF |
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165 | ENDIF |
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166 | ! |
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167 | DO jk = 1, jpkm1 !* trend and after field with monotonic scheme |
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168 | DO jj = 2, jpjm1 |
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169 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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170 | ! ! total intermediate advective trends |
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171 | ztra = - ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
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172 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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173 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) * r1_e1e2t(ji,jj) |
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174 | ! ! update and guess with monotonic sheme |
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175 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ztra / e3t_n(ji,jj,jk) * tmask(ji,jj,jk) |
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176 | zwi(ji,jj,jk) = ( e3t_b(ji,jj,jk) * ptb(ji,jj,jk,jn) + p2dt * ztra ) / e3t_a(ji,jj,jk) * tmask(ji,jj,jk) |
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177 | END DO |
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178 | END DO |
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179 | END DO |
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180 | CALL lbc_lnk( zwi, 'T', 1. ) ! Lateral boundary conditions on zwi (unchanged sign) |
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181 | ! |
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182 | IF( l_trd .OR. l_hst ) THEN ! trend diagnostics (contribution of upstream fluxes) |
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183 | ztrdx(:,:,:) = zwx(:,:,:) ; ztrdy(:,:,:) = zwy(:,:,:) ; ztrdz(:,:,:) = zwz(:,:,:) |
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184 | END IF |
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185 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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186 | IF( l_ptr ) zptry(:,:,:) = zwy(:,:,:) |
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187 | ! |
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188 | ! !== anti-diffusive flux : high order minus low order ==! |
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189 | ! |
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190 | SELECT CASE( kn_fct_h ) !* horizontal anti-diffusive fluxes |
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191 | ! |
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192 | CASE( 2 ) !- 2nd order centered |
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193 | DO jk = 1, jpkm1 |
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194 | DO jj = 1, jpjm1 |
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195 | DO ji = 1, fs_jpim1 ! vector opt. |
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196 | zwx(ji,jj,jk) = 0.5_wp * pun(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji+1,jj,jk,jn) ) - zwx(ji,jj,jk) |
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197 | zwy(ji,jj,jk) = 0.5_wp * pvn(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji,jj+1,jk,jn) ) - zwy(ji,jj,jk) |
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198 | END DO |
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199 | END DO |
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200 | END DO |
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201 | ! |
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202 | CASE( 4 ) !- 4th order centered |
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203 | zltu(:,:,jpk) = 0._wp ! Bottom value : flux set to zero |
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204 | zltv(:,:,jpk) = 0._wp |
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205 | DO jk = 1, jpkm1 ! Laplacian |
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206 | DO jj = 1, jpjm1 ! 1st derivative (gradient) |
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207 | DO ji = 1, fs_jpim1 ! vector opt. |
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208 | ztu(ji,jj,jk) = ( ptn(ji+1,jj ,jk,jn) - ptn(ji,jj,jk,jn) ) * umask(ji,jj,jk) |
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209 | ztv(ji,jj,jk) = ( ptn(ji ,jj+1,jk,jn) - ptn(ji,jj,jk,jn) ) * vmask(ji,jj,jk) |
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210 | END DO |
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211 | END DO |
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212 | DO jj = 2, jpjm1 ! 2nd derivative * 1/ 6 |
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213 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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214 | zltu(ji,jj,jk) = ( ztu(ji,jj,jk) + ztu(ji-1,jj,jk) ) * r1_6 |
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215 | zltv(ji,jj,jk) = ( ztv(ji,jj,jk) + ztv(ji,jj-1,jk) ) * r1_6 |
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216 | END DO |
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217 | END DO |
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218 | END DO |
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219 | CALL lbc_lnk( zltu, 'T', 1. ) ; CALL lbc_lnk( zltv, 'T', 1. ) ! Lateral boundary cond. (unchanged sgn) |
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220 | ! |
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221 | DO jk = 1, jpkm1 ! Horizontal advective fluxes |
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222 | DO jj = 1, jpjm1 |
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223 | DO ji = 1, fs_jpim1 ! vector opt. |
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224 | zC2t_u = ptn(ji,jj,jk,jn) + ptn(ji+1,jj ,jk,jn) ! 2 x C2 interpolation of T at u- & v-points |
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225 | zC2t_v = ptn(ji,jj,jk,jn) + ptn(ji ,jj+1,jk,jn) |
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226 | ! ! C4 minus upstream advective fluxes |
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227 | zwx(ji,jj,jk) = 0.5_wp * pun(ji,jj,jk) * ( zC2t_u + zltu(ji,jj,jk) - zltu(ji+1,jj,jk) ) - zwx(ji,jj,jk) |
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228 | zwy(ji,jj,jk) = 0.5_wp * pvn(ji,jj,jk) * ( zC2t_v + zltv(ji,jj,jk) - zltv(ji,jj+1,jk) ) - zwy(ji,jj,jk) |
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229 | END DO |
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230 | END DO |
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231 | END DO |
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232 | ! |
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233 | CASE( 41 ) !- 4th order centered ==>> !!gm coding attempt need to be tested |
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234 | ztu(:,:,jpk) = 0._wp ! Bottom value : flux set to zero |
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235 | ztv(:,:,jpk) = 0._wp |
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236 | DO jk = 1, jpkm1 ! 1st derivative (gradient) |
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237 | DO jj = 1, jpjm1 |
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238 | DO ji = 1, fs_jpim1 ! vector opt. |
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239 | ztu(ji,jj,jk) = ( ptn(ji+1,jj ,jk,jn) - ptn(ji,jj,jk,jn) ) * umask(ji,jj,jk) |
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240 | ztv(ji,jj,jk) = ( ptn(ji ,jj+1,jk,jn) - ptn(ji,jj,jk,jn) ) * vmask(ji,jj,jk) |
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241 | END DO |
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242 | END DO |
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243 | END DO |
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244 | CALL lbc_lnk( ztu, 'U', -1. ) ; CALL lbc_lnk( ztv, 'V', -1. ) ! Lateral boundary cond. (unchanged sgn) |
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245 | ! |
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246 | DO jk = 1, jpkm1 ! Horizontal advective fluxes |
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247 | DO jj = 2, jpjm1 |
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248 | DO ji = 2, fs_jpim1 ! vector opt. |
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249 | zC2t_u = ptn(ji,jj,jk,jn) + ptn(ji+1,jj ,jk,jn) ! 2 x C2 interpolation of T at u- & v-points (x2) |
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250 | zC2t_v = ptn(ji,jj,jk,jn) + ptn(ji ,jj+1,jk,jn) |
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251 | ! ! C4 interpolation of T at u- & v-points (x2) |
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252 | zC4t_u = zC2t_u + r1_6 * ( ztu(ji-1,jj ,jk) - ztu(ji+1,jj ,jk) ) |
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253 | zC4t_v = zC2t_v + r1_6 * ( ztv(ji ,jj-1,jk) - ztv(ji ,jj+1,jk) ) |
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254 | ! ! C4 minus upstream advective fluxes |
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255 | zwx(ji,jj,jk) = 0.5_wp * pun(ji,jj,jk) * zC4t_u - zwx(ji,jj,jk) |
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256 | zwy(ji,jj,jk) = 0.5_wp * pvn(ji,jj,jk) * zC4t_v - zwy(ji,jj,jk) |
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257 | END DO |
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258 | END DO |
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259 | END DO |
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260 | ! |
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261 | END SELECT |
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262 | ! |
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263 | SELECT CASE( kn_fct_v ) !* vertical anti-diffusive fluxes (w-masked interior values) |
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264 | ! |
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265 | CASE( 2 ) !- 2nd order centered |
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266 | DO jk = 2, jpkm1 |
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267 | DO jj = 2, jpjm1 |
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268 | DO ji = fs_2, fs_jpim1 |
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269 | zwz(ji,jj,jk) = ( pwn(ji,jj,jk) * 0.5_wp * ( ptn(ji,jj,jk,jn) + ptn(ji,jj,jk-1,jn) ) & |
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270 | & - zwz(ji,jj,jk) ) * wmask(ji,jj,jk) |
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271 | END DO |
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272 | END DO |
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273 | END DO |
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274 | ! |
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275 | CASE( 4 ) !- 4th order COMPACT |
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276 | CALL interp_4th_cpt( ptn(:,:,:,jn) , ztw ) ! zwt = COMPACT interpolation of T at w-point |
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277 | DO jk = 2, jpkm1 |
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278 | DO jj = 2, jpjm1 |
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279 | DO ji = fs_2, fs_jpim1 |
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280 | zwz(ji,jj,jk) = ( pwn(ji,jj,jk) * ztw(ji,jj,jk) - zwz(ji,jj,jk) ) * wmask(ji,jj,jk) |
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281 | END DO |
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282 | END DO |
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283 | END DO |
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284 | ! |
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285 | END SELECT |
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286 | IF( ln_linssh ) THEN ! top ocean value: high order = upstream ==>> zwz=0 |
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287 | zwz(:,:,1) = 0._wp ! only ocean surface as interior zwz values have been w-masked |
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288 | ENDIF |
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289 | ! |
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290 | CALL lbc_lnk( zwx, 'U', -1. ) ; CALL lbc_lnk( zwy, 'V', -1. ) ! Lateral bondary conditions |
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291 | CALL lbc_lnk( zwz, 'W', 1. ) |
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292 | ! |
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293 | ! !== monotonicity algorithm ==! |
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294 | ! |
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295 | CALL nonosc( ptb(:,:,:,jn), zwx, zwy, zwz, zwi, p2dt ) |
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296 | ! |
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297 | ! !== final trend with corrected fluxes ==! |
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298 | ! |
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299 | DO jk = 1, jpkm1 |
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300 | DO jj = 2, jpjm1 |
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301 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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302 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) - ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
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303 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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304 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) & |
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305 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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306 | END DO |
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307 | END DO |
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308 | END DO |
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309 | ! |
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310 | IF( l_trd .OR. l_hst ) THEN ! trend diagnostics (contribution of upstream fluxes) |
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311 | ztrdx(:,:,:) = ztrdx(:,:,:) + zwx(:,:,:) ! <<< Add to previously computed |
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312 | ztrdy(:,:,:) = ztrdy(:,:,:) + zwy(:,:,:) ! <<< Add to previously computed |
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313 | ztrdz(:,:,:) = ztrdz(:,:,:) + zwz(:,:,:) ! <<< Add to previously computed |
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314 | ENDIF |
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315 | ! |
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316 | IF( l_trd ) THEN |
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317 | CALL trd_tra( kt, cdtype, jn, jptra_xad, ztrdx, pun, ptn(:,:,:,jn) ) |
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318 | CALL trd_tra( kt, cdtype, jn, jptra_yad, ztrdy, pvn, ptn(:,:,:,jn) ) |
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319 | CALL trd_tra( kt, cdtype, jn, jptra_zad, ztrdz, pwn, ptn(:,:,:,jn) ) |
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320 | ! |
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321 | END IF |
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322 | ! ! heat/salt transport |
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323 | IF( l_hst ) CALL dia_ar5_hst( jn, 'adv', ztrdx(:,:,:), ztrdy(:,:,:) ) |
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324 | |
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325 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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326 | IF( l_ptr ) THEN |
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327 | zptry(:,:,:) = zptry(:,:,:) + zwy(:,:,:) ! <<< Add to previously computed |
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328 | CALL dia_ptr_hst( jn, 'adv', zptry(:,:,:) ) |
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329 | ENDIF |
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330 | ! |
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331 | END DO ! end of tracer loop |
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332 | ! |
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333 | CALL wrk_dealloc( jpi,jpj,jpk, zwi, zwx, zwy, zwz, ztu, ztv, zltu, zltv, ztw ) |
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334 | IF( l_trd .OR. l_hst ) CALL wrk_dealloc( jpi, jpj, jpk, ztrdx, ztrdy, ztrdz ) |
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335 | IF( l_ptr ) CALL wrk_dealloc( jpi, jpj, jpk, zptry ) |
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336 | ! |
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337 | IF( nn_timing == 1 ) CALL timing_stop('tra_adv_fct') |
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338 | ! |
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339 | END SUBROUTINE tra_adv_fct |
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340 | |
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341 | |
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342 | SUBROUTINE tra_adv_fct_zts( kt, kit000, cdtype, p2dt, pun, pvn, pwn, & |
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343 | & ptb, ptn, pta, kjpt, kn_fct_zts ) |
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344 | !!---------------------------------------------------------------------- |
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345 | !! *** ROUTINE tra_adv_fct_zts *** |
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346 | !! |
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347 | !! ** Purpose : Compute the now trend due to total advection of |
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348 | !! tracers and add it to the general trend of tracer equations |
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349 | !! |
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350 | !! ** Method : TVD ZTS scheme, i.e. 2nd order centered scheme with |
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351 | !! corrected flux (monotonic correction). This version use sub- |
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352 | !! timestepping for the vertical advection which increases stability |
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353 | !! when vertical metrics are small. |
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354 | !! note: - this advection scheme needs a leap-frog time scheme |
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355 | !! |
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356 | !! ** Action : - update (pta) with the now advective tracer trends |
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357 | !! - save the trends |
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358 | !!---------------------------------------------------------------------- |
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359 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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360 | INTEGER , INTENT(in ) :: kit000 ! first time step index |
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361 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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362 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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363 | INTEGER , INTENT(in ) :: kn_fct_zts ! number of number of vertical sub-timesteps |
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364 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
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365 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pun, pvn, pwn ! 3 ocean velocity components |
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366 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb, ptn ! before and now tracer fields |
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367 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend |
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368 | ! |
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369 | REAL(wp), DIMENSION( jpk ) :: zts ! length of sub-timestep for vertical advection |
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370 | REAL(wp) :: zr_p2dt ! reciprocal of tracer timestep |
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371 | INTEGER :: ji, jj, jk, jl, jn ! dummy loop indices |
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372 | INTEGER :: jtb, jtn, jta ! sub timestep pointers for leap-frog/euler forward steps |
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373 | INTEGER :: jtaken ! toggle for collecting appropriate fluxes from sub timesteps |
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374 | REAL(wp) :: z_rzts ! Fractional length of Euler forward sub-timestep for vertical advection |
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375 | REAL(wp) :: ztra ! local scalar |
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376 | REAL(wp) :: zfp_ui, zfp_vj, zfp_wk ! - - |
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377 | REAL(wp) :: zfm_ui, zfm_vj, zfm_wk ! - - |
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378 | REAL(wp), POINTER, DIMENSION(:,: ) :: zwx_sav , zwy_sav |
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379 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zwi, zwx, zwy, zwz, zhdiv, zwzts, zwz_sav |
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380 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdx, ztrdy, ztrdz |
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381 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zptry |
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382 | REAL(wp), POINTER, DIMENSION(:,:,:,:) :: ztrs |
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383 | !!---------------------------------------------------------------------- |
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384 | ! |
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385 | IF( nn_timing == 1 ) CALL timing_start('tra_adv_fct_zts') |
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386 | ! |
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387 | CALL wrk_alloc( jpi,jpj, zwx_sav, zwy_sav ) |
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388 | CALL wrk_alloc( jpi,jpj,jpk, zwx, zwy, zwz, zwi, zhdiv, zwzts, zwz_sav ) |
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389 | CALL wrk_alloc( jpi,jpj,jpk,kjpt+1, ztrs ) |
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390 | ! |
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391 | IF( kt == kit000 ) THEN |
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392 | IF(lwp) WRITE(numout,*) |
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393 | IF(lwp) WRITE(numout,*) 'tra_adv_fct_zts : 2nd order FCT scheme with ', kn_fct_zts, ' vertical sub-timestep on ', cdtype |
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394 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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395 | ENDIF |
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396 | ! |
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397 | l_trd = .FALSE. |
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398 | l_hst = .FALSE. |
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399 | l_ptr = .FALSE. |
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400 | IF( ( cdtype == 'TRA' .AND. l_trdtra ) .OR. ( cdtype == 'TRC' .AND. l_trdtrc ) ) l_trd = .TRUE. |
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401 | IF( cdtype == 'TRA' .AND. ln_diaptr ) l_ptr = .TRUE. |
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402 | IF( cdtype == 'TRA' .AND. ( iom_use("uadv_heattr") .OR. iom_use("vadv_heattr") .OR. & |
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403 | & iom_use("uadv_salttr") .OR. iom_use("vadv_salttr") ) ) l_hst = .TRUE. |
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404 | ! |
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405 | IF( l_trd .OR. l_hst ) THEN |
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406 | CALL wrk_alloc( jpi,jpj,jpk, ztrdx, ztrdy, ztrdz ) |
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407 | ztrdx(:,:,:) = 0._wp ; ztrdy(:,:,:) = 0._wp ; ztrdz(:,:,:) = 0._wp |
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408 | ENDIF |
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409 | ! |
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410 | IF( l_ptr ) THEN |
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411 | CALL wrk_alloc( jpi, jpj,jpk, zptry ) |
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412 | zptry(:,:,:) = 0._wp |
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413 | ENDIF |
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414 | zwi(:,:,:) = 0._wp |
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415 | z_rzts = 1._wp / REAL( kn_fct_zts, wp ) |
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416 | zr_p2dt = 1._wp / p2dt |
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417 | ! |
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418 | ! surface & Bottom value : flux set to zero for all tracers |
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419 | zwz(:,:, 1 ) = 0._wp |
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420 | zwx(:,:,jpk) = 0._wp ; zwz(:,:,jpk) = 0._wp |
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421 | zwy(:,:,jpk) = 0._wp ; zwi(:,:,jpk) = 0._wp |
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422 | ! |
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423 | ! ! =========== |
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424 | DO jn = 1, kjpt ! tracer loop |
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425 | ! ! =========== |
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426 | ! |
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427 | ! Upstream advection with initial mass fluxes & intermediate update |
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428 | DO jk = 1, jpkm1 ! upstream tracer flux in the i and j direction |
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429 | DO jj = 1, jpjm1 |
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430 | DO ji = 1, fs_jpim1 ! vector opt. |
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431 | ! upstream scheme |
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432 | zfp_ui = pun(ji,jj,jk) + ABS( pun(ji,jj,jk) ) |
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433 | zfm_ui = pun(ji,jj,jk) - ABS( pun(ji,jj,jk) ) |
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434 | zfp_vj = pvn(ji,jj,jk) + ABS( pvn(ji,jj,jk) ) |
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435 | zfm_vj = pvn(ji,jj,jk) - ABS( pvn(ji,jj,jk) ) |
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436 | zwx(ji,jj,jk) = 0.5_wp * ( zfp_ui * ptb(ji,jj,jk,jn) + zfm_ui * ptb(ji+1,jj ,jk,jn) ) |
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437 | zwy(ji,jj,jk) = 0.5_wp * ( zfp_vj * ptb(ji,jj,jk,jn) + zfm_vj * ptb(ji ,jj+1,jk,jn) ) |
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438 | END DO |
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439 | END DO |
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440 | END DO |
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441 | ! ! upstream tracer flux in the k direction |
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442 | DO jk = 2, jpkm1 ! Interior value |
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443 | DO jj = 1, jpj |
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444 | DO ji = 1, jpi |
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445 | zfp_wk = pwn(ji,jj,jk) + ABS( pwn(ji,jj,jk) ) |
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446 | zfm_wk = pwn(ji,jj,jk) - ABS( pwn(ji,jj,jk) ) |
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447 | zwz(ji,jj,jk) = 0.5_wp * ( zfp_wk * ptb(ji,jj,jk,jn) + zfm_wk * ptb(ji,jj,jk-1,jn) ) * wmask(ji,jj,jk) |
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448 | END DO |
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449 | END DO |
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450 | END DO |
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451 | IF( ln_linssh ) THEN ! top value : linear free surface case only (as zwz is multiplied by wmask) |
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452 | IF( ln_isfcav ) THEN ! ice-shelf cavities: top value |
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453 | DO jj = 1, jpj |
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454 | DO ji = 1, jpi |
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455 | zwz(ji,jj, mikt(ji,jj) ) = pwn(ji,jj,mikt(ji,jj)) * ptb(ji,jj,mikt(ji,jj),jn) |
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456 | END DO |
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457 | END DO |
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458 | ELSE ! no cavities, surface value |
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459 | zwz(:,:,1) = pwn(:,:,1) * ptb(:,:,1,jn) |
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460 | ENDIF |
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461 | ENDIF |
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462 | ! |
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463 | DO jk = 1, jpkm1 ! total advective trend |
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464 | DO jj = 2, jpjm1 |
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465 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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466 | ! ! total intermediate advective trends |
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467 | ztra = - ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
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468 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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469 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) * r1_e1e2t(ji,jj) |
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470 | ! ! update and guess with monotonic sheme |
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471 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ztra / e3t_n(ji,jj,jk) * tmask(ji,jj,jk) |
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472 | zwi(ji,jj,jk) = ( e3t_b(ji,jj,jk) * ptb(ji,jj,jk,jn) + p2dt * ztra ) / e3t_a(ji,jj,jk) * tmask(ji,jj,jk) |
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473 | END DO |
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474 | END DO |
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475 | END DO |
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476 | ! |
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477 | CALL lbc_lnk( zwi, 'T', 1. ) ! Lateral boundary conditions on zwi (unchanged sign) |
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478 | ! |
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479 | IF( l_trd .OR. l_hst ) THEN ! trend diagnostics (contribution of upstream fluxes) |
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480 | ztrdx(:,:,:) = zwx(:,:,:) ; ztrdy(:,:,:) = zwy(:,:,:) ; ztrdz(:,:,:) = zwz(:,:,:) |
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481 | END IF |
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482 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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483 | IF( l_ptr ) zptry(:,:,:) = zwy(:,:,:) |
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484 | |
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485 | ! 3. anti-diffusive flux : high order minus low order |
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486 | ! --------------------------------------------------- |
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487 | |
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488 | DO jk = 1, jpkm1 !* horizontal anti-diffusive fluxes |
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489 | ! |
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490 | DO jj = 1, jpjm1 |
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491 | DO ji = 1, fs_jpim1 ! vector opt. |
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492 | zwx_sav(ji,jj) = zwx(ji,jj,jk) |
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493 | zwy_sav(ji,jj) = zwy(ji,jj,jk) |
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494 | ! |
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495 | zwx(ji,jj,jk) = 0.5_wp * pun(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji+1,jj,jk,jn) ) |
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496 | zwy(ji,jj,jk) = 0.5_wp * pvn(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji,jj+1,jk,jn) ) |
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497 | END DO |
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498 | END DO |
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499 | ! |
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500 | DO jj = 2, jpjm1 ! partial horizontal divergence |
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501 | DO ji = fs_2, fs_jpim1 |
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502 | zhdiv(ji,jj,jk) = ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk) & |
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503 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk) ) |
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504 | END DO |
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505 | END DO |
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506 | ! |
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507 | DO jj = 1, jpjm1 |
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508 | DO ji = 1, fs_jpim1 ! vector opt. |
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509 | zwx(ji,jj,jk) = zwx(ji,jj,jk) - zwx_sav(ji,jj) |
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510 | zwy(ji,jj,jk) = zwy(ji,jj,jk) - zwy_sav(ji,jj) |
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511 | END DO |
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512 | END DO |
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513 | END DO |
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514 | ! |
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515 | ! !* vertical anti-diffusive flux |
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516 | zwz_sav(:,:,:) = zwz(:,:,:) |
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517 | ztrs (:,:,:,1) = ptb(:,:,:,jn) |
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518 | ztrs (:,:,1,2) = ptb(:,:,1,jn) |
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519 | ztrs (:,:,1,3) = ptb(:,:,1,jn) |
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520 | zwzts (:,:,:) = 0._wp |
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521 | ! |
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522 | DO jl = 1, kn_fct_zts ! Start of sub timestepping loop |
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523 | ! |
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524 | IF( jl == 1 ) THEN ! Euler forward to kick things off |
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525 | jtb = 1 ; jtn = 1 ; jta = 2 |
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526 | zts(:) = p2dt * z_rzts |
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527 | jtaken = MOD( kn_fct_zts + 1 , 2) ! Toggle to collect every second flux |
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528 | ! ! starting at jl =1 if kn_fct_zts is odd; |
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529 | ! ! starting at jl =2 otherwise |
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530 | ELSEIF( jl == 2 ) THEN ! First leapfrog step |
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531 | jtb = 1 ; jtn = 2 ; jta = 3 |
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532 | zts(:) = 2._wp * p2dt * z_rzts |
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533 | ELSE ! Shuffle pointers for subsequent leapfrog steps |
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534 | jtb = MOD(jtb,3) + 1 |
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535 | jtn = MOD(jtn,3) + 1 |
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536 | jta = MOD(jta,3) + 1 |
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537 | ENDIF |
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538 | DO jk = 2, jpkm1 ! interior value |
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539 | DO jj = 2, jpjm1 |
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540 | DO ji = fs_2, fs_jpim1 |
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541 | zwz(ji,jj,jk) = 0.5_wp * pwn(ji,jj,jk) * ( ztrs(ji,jj,jk,jtn) + ztrs(ji,jj,jk-1,jtn) ) * wmask(ji,jj,jk) |
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542 | IF( jtaken == 0 ) zwzts(ji,jj,jk) = zwzts(ji,jj,jk) + zwz(ji,jj,jk) * zts(jk) ! Accumulate time-weighted vertcal flux |
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543 | END DO |
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544 | END DO |
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545 | END DO |
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546 | IF( ln_linssh ) THEN ! top value (only in linear free surface case) |
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547 | IF( ln_isfcav ) THEN ! ice-shelf cavities |
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548 | DO jj = 1, jpj |
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549 | DO ji = 1, jpi |
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550 | zwz(ji,jj, mikt(ji,jj) ) = pwn(ji,jj,mikt(ji,jj)) * ptb(ji,jj,mikt(ji,jj),jn) ! linear free surface |
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551 | END DO |
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552 | END DO |
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553 | ELSE ! no ocean cavities |
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554 | zwz(:,:,1) = pwn(:,:,1) * ptb(:,:,1,jn) |
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555 | ENDIF |
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556 | ENDIF |
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557 | ! |
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558 | jtaken = MOD( jtaken + 1 , 2 ) |
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559 | ! |
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560 | DO jk = 2, jpkm1 ! total advective trends |
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561 | DO jj = 2, jpjm1 |
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562 | DO ji = fs_2, fs_jpim1 |
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563 | ztrs(ji,jj,jk,jta) = ztrs(ji,jj,jk,jtb) & |
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564 | & - zts(jk) * ( zhdiv(ji,jj,jk) + zwz(ji,jj,jk) - zwz(ji,jj,jk+1) ) & |
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565 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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566 | END DO |
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567 | END DO |
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568 | END DO |
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569 | ! |
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570 | END DO |
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571 | |
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572 | DO jk = 2, jpkm1 ! Anti-diffusive vertical flux using average flux from the sub-timestepping |
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573 | DO jj = 2, jpjm1 |
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574 | DO ji = fs_2, fs_jpim1 |
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575 | zwz(ji,jj,jk) = ( zwzts(ji,jj,jk) * zr_p2dt - zwz_sav(ji,jj,jk) ) * wmask(ji,jj,jk) |
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576 | END DO |
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577 | END DO |
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578 | END DO |
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579 | CALL lbc_lnk( zwx, 'U', -1. ) ; CALL lbc_lnk( zwy, 'V', -1. ) ! Lateral bondary conditions |
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580 | CALL lbc_lnk( zwz, 'W', 1. ) |
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581 | |
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582 | ! 4. monotonicity algorithm |
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583 | ! ------------------------- |
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584 | CALL nonosc( ptb(:,:,:,jn), zwx, zwy, zwz, zwi, p2dt ) |
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585 | |
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586 | |
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587 | ! 5. final trend with corrected fluxes |
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588 | ! ------------------------------------ |
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589 | DO jk = 1, jpkm1 |
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590 | DO jj = 2, jpjm1 |
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591 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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592 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ( zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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593 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) & |
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594 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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595 | END DO |
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596 | END DO |
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597 | END DO |
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598 | |
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599 | ! |
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600 | IF( l_trd .OR. l_hst ) THEN ! trend diagnostics (contribution of upstream fluxes) |
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601 | ztrdx(:,:,:) = ztrdx(:,:,:) + zwx(:,:,:) ! <<< Add to previously computed |
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602 | ztrdy(:,:,:) = ztrdy(:,:,:) + zwy(:,:,:) ! <<< Add to previously computed |
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603 | ztrdz(:,:,:) = ztrdz(:,:,:) + zwz(:,:,:) ! <<< Add to previously computed |
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604 | ENDIF |
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605 | ! |
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606 | IF( l_trd ) THEN |
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607 | CALL trd_tra( kt, cdtype, jn, jptra_xad, ztrdx, pun, ptn(:,:,:,jn) ) |
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608 | CALL trd_tra( kt, cdtype, jn, jptra_yad, ztrdy, pvn, ptn(:,:,:,jn) ) |
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609 | CALL trd_tra( kt, cdtype, jn, jptra_zad, ztrdz, pwn, ptn(:,:,:,jn) ) |
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610 | ! |
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611 | END IF |
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612 | ! ! heat/salt transport |
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613 | IF( l_hst ) CALL dia_ar5_hst( jn, 'adv', ztrdx(:,:,:), ztrdy(:,:,:) ) |
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614 | |
---|
615 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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616 | IF( l_ptr ) THEN |
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617 | zptry(:,:,:) = zptry(:,:,:) + zwy(:,:,:) ! <<< Add to previously computed |
---|
618 | CALL dia_ptr_hst( jn, 'adv', zptry(:,:,:) ) |
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619 | ENDIF |
---|
620 | ! |
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621 | END DO |
---|
622 | ! |
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623 | CALL wrk_alloc( jpi,jpj, zwx_sav, zwy_sav ) |
---|
624 | CALL wrk_alloc( jpi,jpj, jpk, zwx, zwy, zwz, zwi, zhdiv, zwzts, zwz_sav ) |
---|
625 | CALL wrk_alloc( jpi,jpj,jpk,kjpt+1, ztrs ) |
---|
626 | IF( l_trd .OR. l_hst ) CALL wrk_dealloc( jpi, jpj, jpk, ztrdx, ztrdy, ztrdz ) |
---|
627 | IF( l_ptr ) CALL wrk_dealloc( jpi, jpj, jpk, zptry ) |
---|
628 | ! |
---|
629 | IF( nn_timing == 1 ) CALL timing_stop('tra_adv_fct_zts') |
---|
630 | ! |
---|
631 | END SUBROUTINE tra_adv_fct_zts |
---|
632 | |
---|
633 | |
---|
634 | SUBROUTINE nonosc( pbef, paa, pbb, pcc, paft, p2dt ) |
---|
635 | !!--------------------------------------------------------------------- |
---|
636 | !! *** ROUTINE nonosc *** |
---|
637 | !! |
---|
638 | !! ** Purpose : compute monotonic tracer fluxes from the upstream |
---|
639 | !! scheme and the before field by a nonoscillatory algorithm |
---|
640 | !! |
---|
641 | !! ** Method : ... ??? |
---|
642 | !! warning : pbef and paft must be masked, but the boundaries |
---|
643 | !! conditions on the fluxes are not necessary zalezak (1979) |
---|
644 | !! drange (1995) multi-dimensional forward-in-time and upstream- |
---|
645 | !! in-space based differencing for fluid |
---|
646 | !!---------------------------------------------------------------------- |
---|
647 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
---|
648 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pbef, paft ! before & after field |
---|
649 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(inout) :: paa, pbb, pcc ! monotonic fluxes in the 3 directions |
---|
650 | ! |
---|
651 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
652 | INTEGER :: ikm1 ! local integer |
---|
653 | REAL(wp) :: zpos, zneg, zbt, za, zb, zc, zbig, zrtrn ! local scalars |
---|
654 | REAL(wp) :: zau, zbu, zcu, zav, zbv, zcv, zup, zdo ! - - |
---|
655 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zbetup, zbetdo, zbup, zbdo |
---|
656 | !!---------------------------------------------------------------------- |
---|
657 | ! |
---|
658 | IF( nn_timing == 1 ) CALL timing_start('nonosc') |
---|
659 | ! |
---|
660 | CALL wrk_alloc( jpi, jpj, jpk, zbetup, zbetdo, zbup, zbdo ) |
---|
661 | ! |
---|
662 | zbig = 1.e+40_wp |
---|
663 | zrtrn = 1.e-15_wp |
---|
664 | zbetup(:,:,:) = 0._wp ; zbetdo(:,:,:) = 0._wp |
---|
665 | |
---|
666 | ! Search local extrema |
---|
667 | ! -------------------- |
---|
668 | ! max/min of pbef & paft with large negative/positive value (-/+zbig) inside land |
---|
669 | zbup = MAX( pbef * tmask - zbig * ( 1._wp - tmask ), & |
---|
670 | & paft * tmask - zbig * ( 1._wp - tmask ) ) |
---|
671 | zbdo = MIN( pbef * tmask + zbig * ( 1._wp - tmask ), & |
---|
672 | & paft * tmask + zbig * ( 1._wp - tmask ) ) |
---|
673 | |
---|
674 | DO jk = 1, jpkm1 |
---|
675 | ikm1 = MAX(jk-1,1) |
---|
676 | DO jj = 2, jpjm1 |
---|
677 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
678 | |
---|
679 | ! search maximum in neighbourhood |
---|
680 | zup = MAX( zbup(ji ,jj ,jk ), & |
---|
681 | & zbup(ji-1,jj ,jk ), zbup(ji+1,jj ,jk ), & |
---|
682 | & zbup(ji ,jj-1,jk ), zbup(ji ,jj+1,jk ), & |
---|
683 | & zbup(ji ,jj ,ikm1), zbup(ji ,jj ,jk+1) ) |
---|
684 | |
---|
685 | ! search minimum in neighbourhood |
---|
686 | zdo = MIN( zbdo(ji ,jj ,jk ), & |
---|
687 | & zbdo(ji-1,jj ,jk ), zbdo(ji+1,jj ,jk ), & |
---|
688 | & zbdo(ji ,jj-1,jk ), zbdo(ji ,jj+1,jk ), & |
---|
689 | & zbdo(ji ,jj ,ikm1), zbdo(ji ,jj ,jk+1) ) |
---|
690 | |
---|
691 | ! positive part of the flux |
---|
692 | zpos = MAX( 0., paa(ji-1,jj ,jk ) ) - MIN( 0., paa(ji ,jj ,jk ) ) & |
---|
693 | & + MAX( 0., pbb(ji ,jj-1,jk ) ) - MIN( 0., pbb(ji ,jj ,jk ) ) & |
---|
694 | & + MAX( 0., pcc(ji ,jj ,jk+1) ) - MIN( 0., pcc(ji ,jj ,jk ) ) |
---|
695 | |
---|
696 | ! negative part of the flux |
---|
697 | zneg = MAX( 0., paa(ji ,jj ,jk ) ) - MIN( 0., paa(ji-1,jj ,jk ) ) & |
---|
698 | & + MAX( 0., pbb(ji ,jj ,jk ) ) - MIN( 0., pbb(ji ,jj-1,jk ) ) & |
---|
699 | & + MAX( 0., pcc(ji ,jj ,jk ) ) - MIN( 0., pcc(ji ,jj ,jk+1) ) |
---|
700 | |
---|
701 | ! up & down beta terms |
---|
702 | zbt = e1e2t(ji,jj) * e3t_n(ji,jj,jk) / p2dt |
---|
703 | zbetup(ji,jj,jk) = ( zup - paft(ji,jj,jk) ) / ( zpos + zrtrn ) * zbt |
---|
704 | zbetdo(ji,jj,jk) = ( paft(ji,jj,jk) - zdo ) / ( zneg + zrtrn ) * zbt |
---|
705 | END DO |
---|
706 | END DO |
---|
707 | END DO |
---|
708 | CALL lbc_lnk( zbetup, 'T', 1. ) ; CALL lbc_lnk( zbetdo, 'T', 1. ) ! lateral boundary cond. (unchanged sign) |
---|
709 | |
---|
710 | ! 3. monotonic flux in the i & j direction (paa & pbb) |
---|
711 | ! ---------------------------------------- |
---|
712 | DO jk = 1, jpkm1 |
---|
713 | DO jj = 2, jpjm1 |
---|
714 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
715 | zau = MIN( 1._wp, zbetdo(ji,jj,jk), zbetup(ji+1,jj,jk) ) |
---|
716 | zbu = MIN( 1._wp, zbetup(ji,jj,jk), zbetdo(ji+1,jj,jk) ) |
---|
717 | zcu = ( 0.5 + SIGN( 0.5 , paa(ji,jj,jk) ) ) |
---|
718 | paa(ji,jj,jk) = paa(ji,jj,jk) * ( zcu * zau + ( 1._wp - zcu) * zbu ) |
---|
719 | |
---|
720 | zav = MIN( 1._wp, zbetdo(ji,jj,jk), zbetup(ji,jj+1,jk) ) |
---|
721 | zbv = MIN( 1._wp, zbetup(ji,jj,jk), zbetdo(ji,jj+1,jk) ) |
---|
722 | zcv = ( 0.5 + SIGN( 0.5 , pbb(ji,jj,jk) ) ) |
---|
723 | pbb(ji,jj,jk) = pbb(ji,jj,jk) * ( zcv * zav + ( 1._wp - zcv) * zbv ) |
---|
724 | |
---|
725 | ! monotonic flux in the k direction, i.e. pcc |
---|
726 | ! ------------------------------------------- |
---|
727 | za = MIN( 1., zbetdo(ji,jj,jk+1), zbetup(ji,jj,jk) ) |
---|
728 | zb = MIN( 1., zbetup(ji,jj,jk+1), zbetdo(ji,jj,jk) ) |
---|
729 | zc = ( 0.5 + SIGN( 0.5 , pcc(ji,jj,jk+1) ) ) |
---|
730 | pcc(ji,jj,jk+1) = pcc(ji,jj,jk+1) * ( zc * za + ( 1._wp - zc) * zb ) |
---|
731 | END DO |
---|
732 | END DO |
---|
733 | END DO |
---|
734 | CALL lbc_lnk( paa, 'U', -1. ) ; CALL lbc_lnk( pbb, 'V', -1. ) ! lateral boundary condition (changed sign) |
---|
735 | ! |
---|
736 | CALL wrk_dealloc( jpi, jpj, jpk, zbetup, zbetdo, zbup, zbdo ) |
---|
737 | ! |
---|
738 | IF( nn_timing == 1 ) CALL timing_stop('nonosc') |
---|
739 | ! |
---|
740 | END SUBROUTINE nonosc |
---|
741 | |
---|
742 | |
---|
743 | SUBROUTINE interp_4th_cpt_org( pt_in, pt_out ) |
---|
744 | !!---------------------------------------------------------------------- |
---|
745 | !! *** ROUTINE interp_4th_cpt_org *** |
---|
746 | !! |
---|
747 | !! ** Purpose : Compute the interpolation of tracer at w-point |
---|
748 | !! |
---|
749 | !! ** Method : 4th order compact interpolation |
---|
750 | !!---------------------------------------------------------------------- |
---|
751 | REAL(wp),DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pt_in ! now tracer fields |
---|
752 | REAL(wp),DIMENSION(jpi,jpj,jpk), INTENT( out) :: pt_out ! now tracer field interpolated at w-pts |
---|
753 | ! |
---|
754 | INTEGER :: ji, jj, jk ! dummy loop integers |
---|
755 | REAL(wp),DIMENSION(jpi,jpj,jpk) :: zwd, zwi, zws, zwrm, zwt |
---|
756 | !!---------------------------------------------------------------------- |
---|
757 | |
---|
758 | DO jk = 3, jpkm1 !== build the three diagonal matrix ==! |
---|
759 | DO jj = 1, jpj |
---|
760 | DO ji = 1, jpi |
---|
761 | zwd (ji,jj,jk) = 4._wp |
---|
762 | zwi (ji,jj,jk) = 1._wp |
---|
763 | zws (ji,jj,jk) = 1._wp |
---|
764 | zwrm(ji,jj,jk) = 3._wp * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
765 | ! |
---|
766 | IF( tmask(ji,jj,jk+1) == 0._wp) THEN ! Switch to second order centered at bottom |
---|
767 | zwd (ji,jj,jk) = 1._wp |
---|
768 | zwi (ji,jj,jk) = 0._wp |
---|
769 | zws (ji,jj,jk) = 0._wp |
---|
770 | zwrm(ji,jj,jk) = 0.5 * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
771 | ENDIF |
---|
772 | END DO |
---|
773 | END DO |
---|
774 | END DO |
---|
775 | ! |
---|
776 | jk = 2 ! Switch to second order centered at top |
---|
777 | DO jj = 1, jpj |
---|
778 | DO ji = 1, jpi |
---|
779 | zwd (ji,jj,jk) = 1._wp |
---|
780 | zwi (ji,jj,jk) = 0._wp |
---|
781 | zws (ji,jj,jk) = 0._wp |
---|
782 | zwrm(ji,jj,jk) = 0.5 * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
783 | END DO |
---|
784 | END DO |
---|
785 | ! |
---|
786 | ! !== tridiagonal solve ==! |
---|
787 | DO jj = 1, jpj ! first recurrence |
---|
788 | DO ji = 1, jpi |
---|
789 | zwt(ji,jj,2) = zwd(ji,jj,2) |
---|
790 | END DO |
---|
791 | END DO |
---|
792 | DO jk = 3, jpkm1 |
---|
793 | DO jj = 1, jpj |
---|
794 | DO ji = 1, jpi |
---|
795 | zwt(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) /zwt(ji,jj,jk-1) |
---|
796 | END DO |
---|
797 | END DO |
---|
798 | END DO |
---|
799 | ! |
---|
800 | DO jj = 1, jpj ! second recurrence: Zk = Yk - Ik / Tk-1 Zk-1 |
---|
801 | DO ji = 1, jpi |
---|
802 | pt_out(ji,jj,2) = zwrm(ji,jj,2) |
---|
803 | END DO |
---|
804 | END DO |
---|
805 | DO jk = 3, jpkm1 |
---|
806 | DO jj = 1, jpj |
---|
807 | DO ji = 1, jpi |
---|
808 | pt_out(ji,jj,jk) = zwrm(ji,jj,jk) - zwi(ji,jj,jk) / zwt(ji,jj,jk-1) *pt_out(ji,jj,jk-1) |
---|
809 | END DO |
---|
810 | END DO |
---|
811 | END DO |
---|
812 | |
---|
813 | DO jj = 1, jpj ! third recurrence: Xk = (Zk - Sk Xk+1 ) / Tk |
---|
814 | DO ji = 1, jpi |
---|
815 | pt_out(ji,jj,jpkm1) = pt_out(ji,jj,jpkm1) / zwt(ji,jj,jpkm1) |
---|
816 | END DO |
---|
817 | END DO |
---|
818 | DO jk = jpk-2, 2, -1 |
---|
819 | DO jj = 1, jpj |
---|
820 | DO ji = 1, jpi |
---|
821 | pt_out(ji,jj,jk) = ( pt_out(ji,jj,jk) - zws(ji,jj,jk) * pt_out(ji,jj,jk+1) ) / zwt(ji,jj,jk) |
---|
822 | END DO |
---|
823 | END DO |
---|
824 | END DO |
---|
825 | ! |
---|
826 | END SUBROUTINE interp_4th_cpt_org |
---|
827 | |
---|
828 | |
---|
829 | SUBROUTINE interp_4th_cpt( pt_in, pt_out ) |
---|
830 | !!---------------------------------------------------------------------- |
---|
831 | !! *** ROUTINE interp_4th_cpt *** |
---|
832 | !! |
---|
833 | !! ** Purpose : Compute the interpolation of tracer at w-point |
---|
834 | !! |
---|
835 | !! ** Method : 4th order compact interpolation |
---|
836 | !!---------------------------------------------------------------------- |
---|
837 | REAL(wp),DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pt_in ! field at t-point |
---|
838 | REAL(wp),DIMENSION(jpi,jpj,jpk), INTENT( out) :: pt_out ! field interpolated at w-point |
---|
839 | ! |
---|
840 | INTEGER :: ji, jj, jk ! dummy loop integers |
---|
841 | INTEGER :: ikt, ikb ! local integers |
---|
842 | REAL(wp),DIMENSION(jpi,jpj,jpk) :: zwd, zwi, zws, zwrm, zwt |
---|
843 | !!---------------------------------------------------------------------- |
---|
844 | ! |
---|
845 | ! !== build the three diagonal matrix & the RHS ==! |
---|
846 | ! |
---|
847 | DO jk = 3, jpkm1 ! interior (from jk=3 to jpk-1) |
---|
848 | DO jj = 2, jpjm1 |
---|
849 | DO ji = fs_2, fs_jpim1 |
---|
850 | zwd (ji,jj,jk) = 3._wp * wmask(ji,jj,jk) + 1._wp ! diagonal |
---|
851 | zwi (ji,jj,jk) = wmask(ji,jj,jk) ! lower diagonal |
---|
852 | zws (ji,jj,jk) = wmask(ji,jj,jk) ! upper diagonal |
---|
853 | zwrm(ji,jj,jk) = 3._wp * wmask(ji,jj,jk) & ! RHS |
---|
854 | & * ( pt_in(ji,jj,jk) + pt_in(ji,jj,jk-1) ) |
---|
855 | END DO |
---|
856 | END DO |
---|
857 | END DO |
---|
858 | ! |
---|
859 | !!gm |
---|
860 | ! SELECT CASE( kbc ) !* boundary condition |
---|
861 | ! CASE( np_NH ) ! Neumann homogeneous at top & bottom |
---|
862 | ! CASE( np_CEN2 ) ! 2nd order centered at top & bottom |
---|
863 | ! END SELECT |
---|
864 | !!gm |
---|
865 | ! |
---|
866 | DO jj = 2, jpjm1 ! 2nd order centered at top & bottom |
---|
867 | DO ji = fs_2, fs_jpim1 |
---|
868 | ikt = mikt(ji,jj) + 1 ! w-point below the 1st wet point |
---|
869 | ikb = mbkt(ji,jj) ! - above the last wet point |
---|
870 | ! |
---|
871 | zwd (ji,jj,ikt) = 1._wp ! top |
---|
872 | zwi (ji,jj,ikt) = 0._wp |
---|
873 | zws (ji,jj,ikt) = 0._wp |
---|
874 | zwrm(ji,jj,ikt) = 0.5_wp * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
875 | ! |
---|
876 | zwd (ji,jj,ikb) = 1._wp ! bottom |
---|
877 | zwi (ji,jj,ikb) = 0._wp |
---|
878 | zws (ji,jj,ikb) = 0._wp |
---|
879 | zwrm(ji,jj,ikb) = 0.5_wp * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
880 | END DO |
---|
881 | END DO |
---|
882 | ! |
---|
883 | ! !== tridiagonal solver ==! |
---|
884 | ! |
---|
885 | DO jj = 2, jpjm1 !* 1st recurrence: Tk = Dk - Ik Sk-1 / Tk-1 |
---|
886 | DO ji = fs_2, fs_jpim1 |
---|
887 | zwt(ji,jj,2) = zwd(ji,jj,2) |
---|
888 | END DO |
---|
889 | END DO |
---|
890 | DO jk = 3, jpkm1 |
---|
891 | DO jj = 2, jpjm1 |
---|
892 | DO ji = fs_2, fs_jpim1 |
---|
893 | zwt(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) /zwt(ji,jj,jk-1) |
---|
894 | END DO |
---|
895 | END DO |
---|
896 | END DO |
---|
897 | ! |
---|
898 | DO jj = 2, jpjm1 !* 2nd recurrence: Zk = Yk - Ik / Tk-1 Zk-1 |
---|
899 | DO ji = fs_2, fs_jpim1 |
---|
900 | pt_out(ji,jj,2) = zwrm(ji,jj,2) |
---|
901 | END DO |
---|
902 | END DO |
---|
903 | DO jk = 3, jpkm1 |
---|
904 | DO jj = 2, jpjm1 |
---|
905 | DO ji = fs_2, fs_jpim1 |
---|
906 | pt_out(ji,jj,jk) = zwrm(ji,jj,jk) - zwi(ji,jj,jk) / zwt(ji,jj,jk-1) *pt_out(ji,jj,jk-1) |
---|
907 | END DO |
---|
908 | END DO |
---|
909 | END DO |
---|
910 | |
---|
911 | DO jj = 2, jpjm1 !* 3d recurrence: Xk = (Zk - Sk Xk+1 ) / Tk |
---|
912 | DO ji = fs_2, fs_jpim1 |
---|
913 | pt_out(ji,jj,jpkm1) = pt_out(ji,jj,jpkm1) / zwt(ji,jj,jpkm1) |
---|
914 | END DO |
---|
915 | END DO |
---|
916 | DO jk = jpk-2, 2, -1 |
---|
917 | DO jj = 2, jpjm1 |
---|
918 | DO ji = fs_2, fs_jpim1 |
---|
919 | pt_out(ji,jj,jk) = ( pt_out(ji,jj,jk) - zws(ji,jj,jk) * pt_out(ji,jj,jk+1) ) / zwt(ji,jj,jk) |
---|
920 | END DO |
---|
921 | END DO |
---|
922 | END DO |
---|
923 | ! |
---|
924 | END SUBROUTINE interp_4th_cpt |
---|
925 | |
---|
926 | |
---|
927 | SUBROUTINE tridia_solver( pD, pU, pL, pRHS, pt_out , klev ) |
---|
928 | !!---------------------------------------------------------------------- |
---|
929 | !! *** ROUTINE tridia_solver *** |
---|
930 | !! |
---|
931 | !! ** Purpose : solve a symmetric 3diagonal system |
---|
932 | !! |
---|
933 | !! ** Method : solve M.t_out = RHS(t) where M is a tri diagonal matrix ( jpk*jpk ) |
---|
934 | !! |
---|
935 | !! ( D_1 U_1 0 0 0 )( t_1 ) ( RHS_1 ) |
---|
936 | !! ( L_2 D_2 U_2 0 0 )( t_2 ) ( RHS_2 ) |
---|
937 | !! ( 0 L_3 D_3 U_3 0 )( t_3 ) = ( RHS_3 ) |
---|
938 | !! ( ... )( ... ) ( ... ) |
---|
939 | !! ( 0 0 0 L_k D_k )( t_k ) ( RHS_k ) |
---|
940 | !! |
---|
941 | !! M is decomposed in the product of an upper and lower triangular matrix. |
---|
942 | !! The tri-diagonals matrix is given as input 3D arrays: pD, pU, pL |
---|
943 | !! (i.e. the Diagonal, the Upper diagonal, and the Lower diagonal). |
---|
944 | !! The solution is pta. |
---|
945 | !! The 3d array zwt is used as a work space array. |
---|
946 | !!---------------------------------------------------------------------- |
---|
947 | REAL(wp),DIMENSION(:,:,:), INTENT(in ) :: pD, pU, PL ! 3-diagonal matrix |
---|
948 | REAL(wp),DIMENSION(:,:,:), INTENT(in ) :: pRHS ! Right-Hand-Side |
---|
949 | REAL(wp),DIMENSION(:,:,:), INTENT( out) :: pt_out !!gm field at level=F(klev) |
---|
950 | INTEGER , INTENT(in ) :: klev ! =1 pt_out at w-level |
---|
951 | ! ! =0 pt at t-level |
---|
952 | INTEGER :: ji, jj, jk ! dummy loop integers |
---|
953 | INTEGER :: kstart ! local indices |
---|
954 | REAL(wp),DIMENSION(jpi,jpj,jpk) :: zwt ! 3D work array |
---|
955 | !!---------------------------------------------------------------------- |
---|
956 | ! |
---|
957 | kstart = 1 + klev |
---|
958 | ! |
---|
959 | DO jj = 2, jpjm1 !* 1st recurrence: Tk = Dk - Ik Sk-1 / Tk-1 |
---|
960 | DO ji = fs_2, fs_jpim1 |
---|
961 | zwt(ji,jj,kstart) = pD(ji,jj,kstart) |
---|
962 | END DO |
---|
963 | END DO |
---|
964 | DO jk = kstart+1, jpkm1 |
---|
965 | DO jj = 2, jpjm1 |
---|
966 | DO ji = fs_2, fs_jpim1 |
---|
967 | zwt(ji,jj,jk) = pD(ji,jj,jk) - pL(ji,jj,jk) * pU(ji,jj,jk-1) /zwt(ji,jj,jk-1) |
---|
968 | END DO |
---|
969 | END DO |
---|
970 | END DO |
---|
971 | ! |
---|
972 | DO jj = 2, jpjm1 !* 2nd recurrence: Zk = Yk - Ik / Tk-1 Zk-1 |
---|
973 | DO ji = fs_2, fs_jpim1 |
---|
974 | pt_out(ji,jj,kstart) = pRHS(ji,jj,kstart) |
---|
975 | END DO |
---|
976 | END DO |
---|
977 | DO jk = kstart+1, jpkm1 |
---|
978 | DO jj = 2, jpjm1 |
---|
979 | DO ji = fs_2, fs_jpim1 |
---|
980 | pt_out(ji,jj,jk) = pRHS(ji,jj,jk) - pL(ji,jj,jk) / zwt(ji,jj,jk-1) *pt_out(ji,jj,jk-1) |
---|
981 | END DO |
---|
982 | END DO |
---|
983 | END DO |
---|
984 | |
---|
985 | DO jj = 2, jpjm1 !* 3d recurrence: Xk = (Zk - Sk Xk+1 ) / Tk |
---|
986 | DO ji = fs_2, fs_jpim1 |
---|
987 | pt_out(ji,jj,jpkm1) = pt_out(ji,jj,jpkm1) / zwt(ji,jj,jpkm1) |
---|
988 | END DO |
---|
989 | END DO |
---|
990 | DO jk = jpk-2, kstart, -1 |
---|
991 | DO jj = 2, jpjm1 |
---|
992 | DO ji = fs_2, fs_jpim1 |
---|
993 | pt_out(ji,jj,jk) = ( pt_out(ji,jj,jk) - pU(ji,jj,jk) * pt_out(ji,jj,jk+1) ) / zwt(ji,jj,jk) |
---|
994 | END DO |
---|
995 | END DO |
---|
996 | END DO |
---|
997 | ! |
---|
998 | END SUBROUTINE tridia_solver |
---|
999 | |
---|
1000 | !!====================================================================== |
---|
1001 | END MODULE traadv_fct |
---|