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 | ! |
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23 | USE in_out_manager ! I/O manager |
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24 | USE lib_mpp ! MPP library |
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25 | USE lbclnk ! ocean lateral boundary condition (or mpp link) |
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26 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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27 | USE wrk_nemo ! Memory Allocation |
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28 | USE timing ! Timing |
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29 | |
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30 | IMPLICIT NONE |
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31 | PRIVATE |
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32 | |
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33 | PUBLIC tra_adv_fct ! routine called by traadv.F90 |
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34 | PUBLIC tra_adv_fct_zts ! routine called by traadv.F90 |
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35 | PUBLIC interp_4th_cpt ! routine called by traadv_cen.F90 |
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36 | |
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37 | LOGICAL :: l_trd ! flag to compute trends |
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38 | REAL(wp) :: r1_6 = 1._wp / 6._wp ! =1/6 |
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39 | |
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40 | !! * Substitutions |
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41 | # include "vectopt_loop_substitute.h90" |
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42 | !!---------------------------------------------------------------------- |
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43 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
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44 | !! $Id$ |
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45 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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46 | !!---------------------------------------------------------------------- |
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47 | CONTAINS |
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48 | |
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49 | SUBROUTINE tra_adv_fct( kt, kit000, cdtype, p2dt, pun, pvn, pwn, & |
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50 | & ptb, ptn, pta, kjpt, kn_fct_h, kn_fct_v ) |
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51 | !!---------------------------------------------------------------------- |
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52 | !! *** ROUTINE tra_adv_fct *** |
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53 | !! |
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54 | !! ** Purpose : Compute the now trend due to total advection of tracers |
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55 | !! and add it to the general trend of tracer equations |
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56 | !! |
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57 | !! ** Method : - 2nd or 4th FCT scheme on the horizontal direction |
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58 | !! (choice through the value of kn_fct) |
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59 | !! - on the vertical the 4th order is a compact scheme |
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60 | !! - corrected flux (monotonic correction) |
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61 | !! |
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62 | !! ** Action : - update pta with the now advective tracer trends |
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63 | !! - send trends to trdtra module for further diagnostcs (l_trdtra=T) |
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64 | !! - htr_adv, str_adv : poleward advective heat and salt transport (ln_diaptr=T) |
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65 | !!---------------------------------------------------------------------- |
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66 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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67 | INTEGER , INTENT(in ) :: kit000 ! first time step index |
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68 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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69 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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70 | INTEGER , INTENT(in ) :: kn_fct_h ! order of the FCT scheme (=2 or 4) |
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71 | INTEGER , INTENT(in ) :: kn_fct_v ! order of the FCT scheme (=2 or 4) |
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72 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
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73 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pun, pvn, pwn ! 3 ocean velocity components |
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74 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb, ptn ! before and now tracer fields |
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75 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend |
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76 | ! |
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77 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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78 | REAL(wp) :: ztra ! local scalar |
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79 | REAL(wp) :: zfp_ui, zfp_vj, zfp_wk, zC2t_u, zC4t_u ! - - |
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80 | REAL(wp) :: zfm_ui, zfm_vj, zfm_wk, zC2t_v, zC4t_v ! - - |
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81 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zwi, zwx, zwy, zwz, ztu, ztv, zltu, zltv, ztw |
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82 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdx, ztrdy, ztrdz |
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83 | !!---------------------------------------------------------------------- |
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84 | ! |
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85 | IF( nn_timing == 1 ) CALL timing_start('tra_adv_fct') |
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86 | ! |
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87 | CALL wrk_alloc( jpi,jpj,jpk, zwi, zwx, zwy, zwz, ztu, ztv, zltu, zltv, ztw ) |
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88 | ! |
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89 | IF( kt == kit000 ) THEN |
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90 | IF(lwp) WRITE(numout,*) |
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91 | IF(lwp) WRITE(numout,*) 'tra_adv_fct : FCT advection scheme on ', cdtype |
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92 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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93 | ENDIF |
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94 | ! |
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95 | l_trd = .FALSE. |
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96 | IF( ( cdtype == 'TRA' .AND. l_trdtra ) .OR. ( cdtype == 'TRC' .AND. l_trdtrc ) ) l_trd = .TRUE. |
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97 | ! |
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98 | IF( l_trd ) THEN |
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99 | CALL wrk_alloc( jpi, jpj, jpk, ztrdx, ztrdy, ztrdz ) |
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100 | ztrdx(:,:,:) = 0._wp ; ztrdy(:,:,:) = 0._wp ; ztrdz(:,:,:) = 0._wp |
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101 | ENDIF |
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102 | ! |
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103 | ! ! surface & bottom value : flux set to zero one for all |
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104 | zwz(:,:, 1 ) = 0._wp |
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105 | zwx(:,:,jpk) = 0._wp ; zwy(:,:,jpk) = 0._wp ; zwz(:,:,jpk) = 0._wp |
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106 | ! |
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107 | zwi(:,:,:) = 0._wp |
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108 | ! |
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109 | DO jn = 1, kjpt !== loop over the tracers ==! |
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110 | ! |
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111 | ! !== upstream advection with initial mass fluxes & intermediate update ==! |
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112 | ! !* upstream tracer flux in the i and j direction |
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113 | DO jk = 1, jpkm1 |
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114 | DO jj = 1, jpjm1 |
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115 | DO ji = 1, fs_jpim1 ! vector opt. |
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116 | ! upstream scheme |
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117 | zfp_ui = pun(ji,jj,jk) + ABS( pun(ji,jj,jk) ) |
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118 | zfm_ui = pun(ji,jj,jk) - ABS( pun(ji,jj,jk) ) |
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119 | zfp_vj = pvn(ji,jj,jk) + ABS( pvn(ji,jj,jk) ) |
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120 | zfm_vj = pvn(ji,jj,jk) - ABS( pvn(ji,jj,jk) ) |
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121 | 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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122 | 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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123 | END DO |
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124 | END DO |
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125 | END DO |
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126 | ! !* upstream tracer flux in the k direction *! |
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127 | DO jk = 2, jpkm1 ! Interior value ( multiplied by wmask) |
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128 | DO jj = 1, jpj |
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129 | DO ji = 1, jpi |
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130 | zfp_wk = pwn(ji,jj,jk) + ABS( pwn(ji,jj,jk) ) |
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131 | zfm_wk = pwn(ji,jj,jk) - ABS( pwn(ji,jj,jk) ) |
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132 | 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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133 | END DO |
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134 | END DO |
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135 | END DO |
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136 | IF( ln_linssh ) THEN ! top ocean value (only in linear free surface as zwz has been w-masked) |
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137 | IF( ln_isfcav ) THEN ! top of the ice-shelf cavities and at the ocean surface |
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138 | DO jj = 1, jpj |
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139 | DO ji = 1, jpi |
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140 | 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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141 | END DO |
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142 | END DO |
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143 | ELSE ! no cavities: only at the ocean surface |
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144 | zwz(:,:,1) = pwn(:,:,1) * ptb(:,:,1,jn) |
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145 | ENDIF |
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146 | ENDIF |
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147 | ! |
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148 | DO jk = 1, jpkm1 !* trend and after field with monotonic scheme |
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149 | DO jj = 2, jpjm1 |
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150 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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151 | ! total intermediate advective trends |
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152 | ztra = - ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
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153 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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154 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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155 | ! update and guess with monotonic sheme |
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156 | !!gm why tmask added in the two following lines ??? the mask is done in tranxt ! |
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157 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ztra * tmask(ji,jj,jk) |
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158 | zwi(ji,jj,jk) = ( ptb(ji,jj,jk,jn) + p2dt * ztra ) * tmask(ji,jj,jk) |
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159 | END DO |
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160 | END DO |
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161 | END DO |
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162 | CALL lbc_lnk( zwi, 'T', 1. ) ! Lateral boundary conditions on zwi (unchanged sign) |
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163 | ! |
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164 | IF( l_trd ) THEN ! trend diagnostics (contribution of upstream fluxes) |
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165 | ztrdx(:,:,:) = zwx(:,:,:) ; ztrdy(:,:,:) = zwy(:,:,:) ; ztrdz(:,:,:) = zwz(:,:,:) |
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166 | END IF |
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167 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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168 | IF( cdtype == 'TRA' .AND. ln_diaptr ) THEN |
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169 | IF( jn == jp_tem ) htr_adv(:) = ptr_sj( zwy(:,:,:) ) |
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170 | IF( jn == jp_sal ) str_adv(:) = ptr_sj( zwy(:,:,:) ) |
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171 | ENDIF |
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172 | ! |
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173 | ! !== anti-diffusive flux : high order minus low order ==! |
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174 | ! |
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175 | SELECT CASE( kn_fct_h ) !* horizontal anti-diffusive fluxes |
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176 | ! |
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177 | CASE( 2 ) !- 2nd order centered |
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178 | DO jk = 1, jpkm1 |
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179 | DO jj = 1, jpjm1 |
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180 | DO ji = 1, fs_jpim1 ! vector opt. |
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181 | 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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182 | 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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183 | END DO |
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184 | END DO |
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185 | END DO |
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186 | ! |
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187 | CASE( 4 ) !- 4th order centered |
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188 | zltu(:,:,jpk) = 0._wp ! Bottom value : flux set to zero |
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189 | zltv(:,:,jpk) = 0._wp |
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190 | DO jk = 1, jpkm1 ! Laplacian |
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191 | DO jj = 1, jpjm1 ! 1st derivative (gradient) |
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192 | DO ji = 1, fs_jpim1 ! vector opt. |
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193 | ztu(ji,jj,jk) = ( ptn(ji+1,jj ,jk,jn) - ptn(ji,jj,jk,jn) ) * umask(ji,jj,jk) |
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194 | ztv(ji,jj,jk) = ( ptn(ji ,jj+1,jk,jn) - ptn(ji,jj,jk,jn) ) * vmask(ji,jj,jk) |
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195 | END DO |
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196 | END DO |
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197 | DO jj = 2, jpjm1 ! 2nd derivative * 1/ 6 |
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198 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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199 | zltu(ji,jj,jk) = ( ztu(ji,jj,jk) + ztu(ji-1,jj,jk) ) * r1_6 |
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200 | zltv(ji,jj,jk) = ( ztv(ji,jj,jk) + ztv(ji,jj-1,jk) ) * r1_6 |
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201 | END DO |
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202 | END DO |
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203 | END DO |
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204 | CALL lbc_lnk( zltu, 'T', 1. ) ; CALL lbc_lnk( zltv, 'T', 1. ) ! Lateral boundary cond. (unchanged sgn) |
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205 | ! |
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206 | DO jk = 1, jpkm1 ! Horizontal advective fluxes |
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207 | DO jj = 1, jpjm1 |
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208 | DO ji = 1, fs_jpim1 ! vector opt. |
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209 | 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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210 | zC2t_v = ptn(ji,jj,jk,jn) + ptn(ji ,jj+1,jk,jn) |
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211 | ! ! C4 minus upstream advective fluxes |
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212 | 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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213 | 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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214 | END DO |
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215 | END DO |
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216 | END DO |
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217 | ! |
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218 | CASE( 41 ) !- 4th order centered ==>> !!gm coding attempt need to be tested |
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219 | ztu(:,:,jpk) = 0._wp ! Bottom value : flux set to zero |
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220 | ztv(:,:,jpk) = 0._wp |
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221 | DO jk = 1, jpkm1 ! 1st derivative (gradient) |
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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 | ztu(ji,jj,jk) = ( ptn(ji+1,jj ,jk,jn) - ptn(ji,jj,jk,jn) ) * umask(ji,jj,jk) |
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225 | ztv(ji,jj,jk) = ( ptn(ji ,jj+1,jk,jn) - ptn(ji,jj,jk,jn) ) * vmask(ji,jj,jk) |
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226 | END DO |
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227 | END DO |
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228 | END DO |
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229 | CALL lbc_lnk( ztu, 'U', -1. ) ; CALL lbc_lnk( ztv, 'V', -1. ) ! Lateral boundary cond. (unchanged sgn) |
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230 | ! |
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231 | DO jk = 1, jpkm1 ! Horizontal advective fluxes |
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232 | DO jj = 2, jpjm1 |
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233 | DO ji = 2, fs_jpim1 ! vector opt. |
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234 | 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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235 | zC2t_v = ptn(ji,jj,jk,jn) + ptn(ji ,jj+1,jk,jn) |
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236 | ! ! C4 interpolation of T at u- & v-points (x2) |
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237 | zC4t_u = zC2t_u + r1_6 * ( ztu(ji-1,jj ,jk) - ztu(ji+1,jj ,jk) ) |
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238 | zC4t_v = zC2t_v + r1_6 * ( ztv(ji ,jj-1,jk) - ztv(ji ,jj+1,jk) ) |
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239 | ! ! C4 minus upstream advective fluxes |
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240 | zwx(ji,jj,jk) = 0.5_wp * pun(ji,jj,jk) * zC4t_u - zwx(ji,jj,jk) |
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241 | zwy(ji,jj,jk) = 0.5_wp * pvn(ji,jj,jk) * zC4t_v - zwy(ji,jj,jk) |
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242 | END DO |
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243 | END DO |
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244 | END DO |
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245 | ! |
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246 | END SELECT |
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247 | ! |
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248 | SELECT CASE( kn_fct_v ) !* vertical anti-diffusive fluxes (w-masked interior values) |
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249 | ! |
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250 | CASE( 2 ) !- 2nd order centered |
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251 | DO jk = 2, jpkm1 |
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252 | DO jj = 2, jpjm1 |
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253 | DO ji = fs_2, fs_jpim1 |
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254 | 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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255 | & - zwz(ji,jj,jk) ) * wmask(ji,jj,jk) |
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256 | END DO |
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257 | END DO |
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258 | END DO |
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259 | ! |
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260 | CASE( 4 ) !- 4th order COMPACT |
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261 | CALL interp_4th_cpt( ptn(:,:,:,jn) , ztw ) ! zwt = COMPACT interpolation of T at w-point |
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262 | DO jk = 2, jpkm1 |
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263 | DO jj = 2, jpjm1 |
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264 | DO ji = fs_2, fs_jpim1 |
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265 | zwz(ji,jj,jk) = ( pwn(ji,jj,jk) * ztw(ji,jj,jk) - zwz(ji,jj,jk) ) * wmask(ji,jj,jk) |
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266 | END DO |
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267 | END DO |
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268 | END DO |
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269 | ! |
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270 | END SELECT |
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271 | IF( ln_linssh ) THEN ! top ocean value: high order = upstream ==>> zwz=0 |
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272 | zwz(:,:,1) = 0._wp ! only ocean surface as interior zwz values have been w-masked |
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273 | ENDIF |
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274 | ! |
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275 | CALL lbc_lnk( zwx, 'U', -1. ) ; CALL lbc_lnk( zwy, 'V', -1. ) ! Lateral bondary conditions |
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276 | CALL lbc_lnk( zwz, 'W', 1. ) |
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277 | ! |
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278 | ! !== monotonicity algorithm ==! |
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279 | ! |
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280 | CALL nonosc( ptb(:,:,:,jn), zwx, zwy, zwz, zwi, p2dt ) |
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281 | ! |
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282 | ! !== final trend with corrected fluxes ==! |
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283 | ! |
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284 | DO jk = 1, jpkm1 |
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285 | DO jj = 2, jpjm1 |
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286 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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287 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) - ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
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288 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
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289 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) & |
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290 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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291 | END DO |
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292 | END DO |
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293 | END DO |
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294 | ! |
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295 | IF( l_trd ) THEN ! trend diagnostics (contribution of upstream fluxes) |
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296 | ztrdx(:,:,:) = ztrdx(:,:,:) + zwx(:,:,:) ! <<< Add to previously computed |
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297 | ztrdy(:,:,:) = ztrdy(:,:,:) + zwy(:,:,:) ! <<< Add to previously computed |
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298 | ztrdz(:,:,:) = ztrdz(:,:,:) + zwz(:,:,:) ! <<< Add to previously computed |
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299 | ! |
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300 | CALL trd_tra( kt, cdtype, jn, jptra_xad, ztrdx, pun, ptn(:,:,:,jn) ) |
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301 | CALL trd_tra( kt, cdtype, jn, jptra_yad, ztrdy, pvn, ptn(:,:,:,jn) ) |
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302 | CALL trd_tra( kt, cdtype, jn, jptra_zad, ztrdz, pwn, ptn(:,:,:,jn) ) |
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303 | ! |
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304 | CALL wrk_dealloc( jpi,jpj,jpk, ztrdx, ztrdy, ztrdz ) |
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305 | END IF |
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306 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
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307 | IF( cdtype == 'TRA' .AND. ln_diaptr ) THEN |
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308 | IF( jn == jp_tem ) htr_adv(:) = htr_adv(:) + ptr_sj( zwy(:,:,:) ) |
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309 | IF( jn == jp_sal ) str_adv(:) = str_adv(:) + ptr_sj( zwy(:,:,:) ) |
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310 | ENDIF |
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311 | ! |
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312 | END DO ! end of tracer loop |
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313 | ! |
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314 | CALL wrk_dealloc( jpi,jpj,jpk, zwi, zwx, zwy, zwz, ztu, ztv, zltu, zltv, ztw ) |
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315 | ! |
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316 | IF( nn_timing == 1 ) CALL timing_stop('tra_adv_fct') |
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317 | ! |
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318 | END SUBROUTINE tra_adv_fct |
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319 | |
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320 | |
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321 | SUBROUTINE tra_adv_fct_zts( kt, kit000, cdtype, p2dt, pun, pvn, pwn, & |
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322 | & ptb, ptn, pta, kjpt, kn_fct_zts ) |
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323 | !!---------------------------------------------------------------------- |
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324 | !! *** ROUTINE tra_adv_fct_zts *** |
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325 | !! |
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326 | !! ** Purpose : Compute the now trend due to total advection of |
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327 | !! tracers and add it to the general trend of tracer equations |
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328 | !! |
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329 | !! ** Method : TVD ZTS scheme, i.e. 2nd order centered scheme with |
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330 | !! corrected flux (monotonic correction). This version use sub- |
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331 | !! timestepping for the vertical advection which increases stability |
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332 | !! when vertical metrics are small. |
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333 | !! note: - this advection scheme needs a leap-frog time scheme |
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334 | !! |
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335 | !! ** Action : - update (pta) with the now advective tracer trends |
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336 | !! - save the trends |
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337 | !!---------------------------------------------------------------------- |
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338 | INTEGER , INTENT(in ) :: kt ! ocean time-step index |
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339 | INTEGER , INTENT(in ) :: kit000 ! first time step index |
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340 | CHARACTER(len=3) , INTENT(in ) :: cdtype ! =TRA or TRC (tracer indicator) |
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341 | INTEGER , INTENT(in ) :: kjpt ! number of tracers |
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342 | INTEGER , INTENT(in ) :: kn_fct_zts ! number of number of vertical sub-timesteps |
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343 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
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344 | REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT(in ) :: pun, pvn, pwn ! 3 ocean velocity components |
---|
345 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb, ptn ! before and now tracer fields |
---|
346 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend |
---|
347 | ! |
---|
348 | REAL(wp), DIMENSION( jpk ) :: zts ! length of sub-timestep for vertical advection |
---|
349 | REAL(wp) :: zr_p2dt ! reciprocal of tracer timestep |
---|
350 | INTEGER :: ji, jj, jk, jl, jn ! dummy loop indices |
---|
351 | INTEGER :: jtb, jtn, jta ! sub timestep pointers for leap-frog/euler forward steps |
---|
352 | INTEGER :: jtaken ! toggle for collecting appropriate fluxes from sub timesteps |
---|
353 | REAL(wp) :: z_rzts ! Fractional length of Euler forward sub-timestep for vertical advection |
---|
354 | REAL(wp) :: ztra ! local scalar |
---|
355 | REAL(wp) :: zfp_ui, zfp_vj, zfp_wk ! - - |
---|
356 | REAL(wp) :: zfm_ui, zfm_vj, zfm_wk ! - - |
---|
357 | REAL(wp), POINTER, DIMENSION(:,: ) :: zwx_sav , zwy_sav |
---|
358 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zwi, zwx, zwy, zwz, zhdiv, zwzts, zwz_sav |
---|
359 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdx, ztrdy, ztrdz |
---|
360 | REAL(wp), POINTER, DIMENSION(:,:,:,:) :: ztrs |
---|
361 | !!---------------------------------------------------------------------- |
---|
362 | ! |
---|
363 | IF( nn_timing == 1 ) CALL timing_start('tra_adv_fct_zts') |
---|
364 | ! |
---|
365 | CALL wrk_alloc( jpi,jpj, zwx_sav, zwy_sav ) |
---|
366 | CALL wrk_alloc( jpi,jpj, jpk, zwx, zwy, zwz, zwi, zhdiv, zwzts, zwz_sav ) |
---|
367 | CALL wrk_alloc( jpi,jpj,jpk,kjpt+1, ztrs ) |
---|
368 | ! |
---|
369 | IF( kt == kit000 ) THEN |
---|
370 | IF(lwp) WRITE(numout,*) |
---|
371 | IF(lwp) WRITE(numout,*) 'tra_adv_fct_zts : 2nd order FCT scheme with ', kn_fct_zts, ' vertical sub-timestep on ', cdtype |
---|
372 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
---|
373 | ENDIF |
---|
374 | ! |
---|
375 | l_trd = .FALSE. |
---|
376 | IF( ( cdtype == 'TRA' .AND. l_trdtra ) .OR. ( cdtype == 'TRC' .AND. l_trdtrc ) ) l_trd = .TRUE. |
---|
377 | ! |
---|
378 | IF( l_trd ) THEN |
---|
379 | CALL wrk_alloc( jpi,jpj,jpk, ztrdx, ztrdy, ztrdz ) |
---|
380 | ztrdx(:,:,:) = 0._wp ; ztrdy(:,:,:) = 0._wp ; ztrdz(:,:,:) = 0._wp |
---|
381 | ENDIF |
---|
382 | ! |
---|
383 | zwi(:,:,:) = 0._wp |
---|
384 | z_rzts = 1._wp / REAL( kn_fct_zts, wp ) |
---|
385 | zr_p2dt = 1._wp / p2dt |
---|
386 | ! |
---|
387 | ! surface & Bottom value : flux set to zero for all tracers |
---|
388 | zwz(:,:, 1 ) = 0._wp |
---|
389 | zwx(:,:,jpk) = 0._wp ; zwz(:,:,jpk) = 0._wp |
---|
390 | zwy(:,:,jpk) = 0._wp ; zwi(:,:,jpk) = 0._wp |
---|
391 | ! |
---|
392 | ! ! =========== |
---|
393 | DO jn = 1, kjpt ! tracer loop |
---|
394 | ! ! =========== |
---|
395 | ! |
---|
396 | ! Upstream advection with initial mass fluxes & intermediate update |
---|
397 | DO jk = 1, jpkm1 ! upstream tracer flux in the i and j direction |
---|
398 | DO jj = 1, jpjm1 |
---|
399 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
400 | ! upstream scheme |
---|
401 | zfp_ui = pun(ji,jj,jk) + ABS( pun(ji,jj,jk) ) |
---|
402 | zfm_ui = pun(ji,jj,jk) - ABS( pun(ji,jj,jk) ) |
---|
403 | zfp_vj = pvn(ji,jj,jk) + ABS( pvn(ji,jj,jk) ) |
---|
404 | zfm_vj = pvn(ji,jj,jk) - ABS( pvn(ji,jj,jk) ) |
---|
405 | zwx(ji,jj,jk) = 0.5_wp * ( zfp_ui * ptb(ji,jj,jk,jn) + zfm_ui * ptb(ji+1,jj ,jk,jn) ) |
---|
406 | zwy(ji,jj,jk) = 0.5_wp * ( zfp_vj * ptb(ji,jj,jk,jn) + zfm_vj * ptb(ji ,jj+1,jk,jn) ) |
---|
407 | END DO |
---|
408 | END DO |
---|
409 | END DO |
---|
410 | ! ! upstream tracer flux in the k direction |
---|
411 | DO jk = 2, jpkm1 ! Interior value |
---|
412 | DO jj = 1, jpj |
---|
413 | DO ji = 1, jpi |
---|
414 | zfp_wk = pwn(ji,jj,jk) + ABS( pwn(ji,jj,jk) ) |
---|
415 | zfm_wk = pwn(ji,jj,jk) - ABS( pwn(ji,jj,jk) ) |
---|
416 | 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) |
---|
417 | END DO |
---|
418 | END DO |
---|
419 | END DO |
---|
420 | IF( ln_linssh ) THEN ! top value : linear free surface case only (as zwz is multiplied by wmask) |
---|
421 | IF( ln_isfcav ) THEN ! ice-shelf cavities: top value |
---|
422 | DO jj = 1, jpj |
---|
423 | DO ji = 1, jpi |
---|
424 | zwz(ji,jj, mikt(ji,jj) ) = pwn(ji,jj,mikt(ji,jj)) * ptb(ji,jj,mikt(ji,jj),jn) |
---|
425 | END DO |
---|
426 | END DO |
---|
427 | ELSE ! no cavities, surface value |
---|
428 | zwz(:,:,1) = pwn(:,:,1) * ptb(:,:,1,jn) |
---|
429 | ENDIF |
---|
430 | ENDIF |
---|
431 | ! |
---|
432 | DO jk = 1, jpkm1 ! total advective trend |
---|
433 | DO jj = 2, jpjm1 |
---|
434 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
435 | ! ! total intermediate advective trends |
---|
436 | ztra = - ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk ) & |
---|
437 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
---|
438 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
---|
439 | ! ! update and guess with monotonic sheme |
---|
440 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ztra |
---|
441 | zwi(ji,jj,jk) = ( ptb(ji,jj,jk,jn) + p2dt * ztra ) * tmask(ji,jj,jk) |
---|
442 | END DO |
---|
443 | END DO |
---|
444 | END DO |
---|
445 | ! |
---|
446 | CALL lbc_lnk( zwi, 'T', 1. ) ! Lateral boundary conditions on zwi (unchanged sign) |
---|
447 | ! |
---|
448 | IF( l_trd ) THEN ! trend diagnostics (contribution of upstream fluxes) |
---|
449 | ztrdx(:,:,:) = zwx(:,:,:) ; ztrdy(:,:,:) = zwy(:,:,:) ; ztrdz(:,:,:) = zwz(:,:,:) |
---|
450 | END IF |
---|
451 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
---|
452 | IF( cdtype == 'TRA' .AND. ln_diaptr ) THEN |
---|
453 | IF( jn == jp_tem ) htr_adv(:) = ptr_sj( zwy(:,:,:) ) |
---|
454 | IF( jn == jp_sal ) str_adv(:) = ptr_sj( zwy(:,:,:) ) |
---|
455 | ENDIF |
---|
456 | |
---|
457 | ! 3. anti-diffusive flux : high order minus low order |
---|
458 | ! --------------------------------------------------- |
---|
459 | |
---|
460 | DO jk = 1, jpkm1 !* horizontal anti-diffusive fluxes |
---|
461 | ! |
---|
462 | DO jj = 1, jpjm1 |
---|
463 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
464 | zwx_sav(ji,jj) = zwx(ji,jj,jk) |
---|
465 | zwy_sav(ji,jj) = zwy(ji,jj,jk) |
---|
466 | ! |
---|
467 | zwx(ji,jj,jk) = 0.5_wp * pun(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji+1,jj,jk,jn) ) |
---|
468 | zwy(ji,jj,jk) = 0.5_wp * pvn(ji,jj,jk) * ( ptn(ji,jj,jk,jn) + ptn(ji,jj+1,jk,jn) ) |
---|
469 | END DO |
---|
470 | END DO |
---|
471 | ! |
---|
472 | DO jj = 2, jpjm1 ! partial horizontal divergence |
---|
473 | DO ji = fs_2, fs_jpim1 |
---|
474 | zhdiv(ji,jj,jk) = ( zwx(ji,jj,jk) - zwx(ji-1,jj ,jk) & |
---|
475 | & + zwy(ji,jj,jk) - zwy(ji ,jj-1,jk) ) |
---|
476 | END DO |
---|
477 | END DO |
---|
478 | ! |
---|
479 | DO jj = 1, jpjm1 |
---|
480 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
481 | zwx(ji,jj,jk) = zwx(ji,jj,jk) - zwx_sav(ji,jj) |
---|
482 | zwy(ji,jj,jk) = zwy(ji,jj,jk) - zwy_sav(ji,jj) |
---|
483 | END DO |
---|
484 | END DO |
---|
485 | END DO |
---|
486 | ! |
---|
487 | ! !* vertical anti-diffusive flux |
---|
488 | zwz_sav(:,:,:) = zwz(:,:,:) |
---|
489 | ztrs (:,:,:,1) = ptb(:,:,:,jn) |
---|
490 | zwzts (:,:,:) = 0._wp |
---|
491 | ! |
---|
492 | DO jl = 1, kn_fct_zts ! Start of sub timestepping loop |
---|
493 | ! |
---|
494 | IF( jl == 1 ) THEN ! Euler forward to kick things off |
---|
495 | jtb = 1 ; jtn = 1 ; jta = 2 |
---|
496 | zts(:) = p2dt * z_rzts |
---|
497 | jtaken = MOD( kn_fct_zts + 1 , 2) ! Toggle to collect every second flux |
---|
498 | ! ! starting at jl =1 if kn_fct_zts is odd; |
---|
499 | ! ! starting at jl =2 otherwise |
---|
500 | ELSEIF( jl == 2 ) THEN ! First leapfrog step |
---|
501 | jtb = 1 ; jtn = 2 ; jta = 3 |
---|
502 | zts(:) = 2._wp * p2dt * z_rzts |
---|
503 | ELSE ! Shuffle pointers for subsequent leapfrog steps |
---|
504 | jtb = MOD(jtb,3) + 1 |
---|
505 | jtn = MOD(jtn,3) + 1 |
---|
506 | jta = MOD(jta,3) + 1 |
---|
507 | ENDIF |
---|
508 | DO jk = 2, jpkm1 ! interior value |
---|
509 | DO jj = 2, jpjm1 |
---|
510 | DO ji = fs_2, fs_jpim1 |
---|
511 | 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) |
---|
512 | IF( jtaken == 0 ) zwzts(ji,jj,jk) = zwzts(ji,jj,jk) + zwz(ji,jj,jk) * zts(jk) ! Accumulate time-weighted vertcal flux |
---|
513 | END DO |
---|
514 | END DO |
---|
515 | END DO |
---|
516 | IF( ln_linssh ) THEN ! top value (only in linear free surface case) |
---|
517 | IF( ln_isfcav ) THEN ! ice-shelf cavities |
---|
518 | DO jj = 1, jpj |
---|
519 | DO ji = 1, jpi |
---|
520 | zwz(ji,jj, mikt(ji,jj) ) = pwn(ji,jj,mikt(ji,jj)) * ptb(ji,jj,mikt(ji,jj),jn) ! linear free surface |
---|
521 | END DO |
---|
522 | END DO |
---|
523 | ELSE ! no ocean cavities |
---|
524 | zwz(:,:,1) = pwn(:,:,1) * ptb(:,:,1,jn) |
---|
525 | ENDIF |
---|
526 | ENDIF |
---|
527 | ! |
---|
528 | jtaken = MOD( jtaken + 1 , 2 ) |
---|
529 | ! |
---|
530 | DO jk = 2, jpkm1 ! total advective trends |
---|
531 | DO jj = 2, jpjm1 |
---|
532 | DO ji = fs_2, fs_jpim1 |
---|
533 | ztrs(ji,jj,jk,jta) = ztrs(ji,jj,jk,jtb) & |
---|
534 | & - zts(jk) * ( zhdiv(ji,jj,jk) + zwz(ji,jj,jk) - zwz(ji,jj,jk+1) ) & |
---|
535 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
---|
536 | END DO |
---|
537 | END DO |
---|
538 | END DO |
---|
539 | ! |
---|
540 | END DO |
---|
541 | |
---|
542 | DO jk = 2, jpkm1 ! Anti-diffusive vertical flux using average flux from the sub-timestepping |
---|
543 | DO jj = 2, jpjm1 |
---|
544 | DO ji = fs_2, fs_jpim1 |
---|
545 | zwz(ji,jj,jk) = ( zwzts(ji,jj,jk) * zr_p2dt - zwz_sav(ji,jj,jk) ) * wmask(ji,jj,jk) |
---|
546 | END DO |
---|
547 | END DO |
---|
548 | END DO |
---|
549 | CALL lbc_lnk( zwx, 'U', -1. ) ; CALL lbc_lnk( zwy, 'V', -1. ) ! Lateral bondary conditions |
---|
550 | CALL lbc_lnk( zwz, 'W', 1. ) |
---|
551 | |
---|
552 | ! 4. monotonicity algorithm |
---|
553 | ! ------------------------- |
---|
554 | CALL nonosc( ptb(:,:,:,jn), zwx, zwy, zwz, zwi, p2dt ) |
---|
555 | |
---|
556 | |
---|
557 | ! 5. final trend with corrected fluxes |
---|
558 | ! ------------------------------------ |
---|
559 | DO jk = 1, jpkm1 |
---|
560 | DO jj = 2, jpjm1 |
---|
561 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
562 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + ( zwy(ji,jj,jk) - zwy(ji ,jj-1,jk ) & |
---|
563 | & + zwz(ji,jj,jk) - zwz(ji ,jj ,jk+1) ) & |
---|
564 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
---|
565 | END DO |
---|
566 | END DO |
---|
567 | END DO |
---|
568 | |
---|
569 | ! ! trend diagnostics (contribution of upstream fluxes) |
---|
570 | IF( l_trd ) THEN |
---|
571 | ztrdx(:,:,:) = ztrdx(:,:,:) + zwx(:,:,:) ! <<< Add to previously computed |
---|
572 | ztrdy(:,:,:) = ztrdy(:,:,:) + zwy(:,:,:) ! <<< Add to previously computed |
---|
573 | ztrdz(:,:,:) = ztrdz(:,:,:) + zwz(:,:,:) ! <<< Add to previously computed |
---|
574 | ! |
---|
575 | CALL trd_tra( kt, cdtype, jn, jptra_xad, ztrdx, pun, ptn(:,:,:,jn) ) |
---|
576 | CALL trd_tra( kt, cdtype, jn, jptra_yad, ztrdy, pvn, ptn(:,:,:,jn) ) |
---|
577 | CALL trd_tra( kt, cdtype, jn, jptra_zad, ztrdz, pwn, ptn(:,:,:,jn) ) |
---|
578 | ! |
---|
579 | CALL wrk_dealloc( jpi,jpj,jpk, ztrdx, ztrdy, ztrdz ) |
---|
580 | END IF |
---|
581 | ! ! "Poleward" heat and salt transports (contribution of upstream fluxes) |
---|
582 | IF( cdtype == 'TRA' .AND. ln_diaptr ) THEN |
---|
583 | IF( jn == jp_tem ) htr_adv(:) = ptr_sj( zwy(:,:,:) ) + htr_adv(:) |
---|
584 | IF( jn == jp_sal ) str_adv(:) = ptr_sj( zwy(:,:,:) ) + str_adv(:) |
---|
585 | ENDIF |
---|
586 | ! |
---|
587 | END DO |
---|
588 | ! |
---|
589 | CALL wrk_alloc( jpi,jpj, zwx_sav, zwy_sav ) |
---|
590 | CALL wrk_alloc( jpi,jpj, jpk, zwx, zwy, zwz, zwi, zhdiv, zwzts, zwz_sav ) |
---|
591 | CALL wrk_alloc( jpi,jpj,jpk,kjpt+1, ztrs ) |
---|
592 | ! |
---|
593 | IF( nn_timing == 1 ) CALL timing_stop('tra_adv_fct_zts') |
---|
594 | ! |
---|
595 | END SUBROUTINE tra_adv_fct_zts |
---|
596 | |
---|
597 | |
---|
598 | SUBROUTINE nonosc( pbef, paa, pbb, pcc, paft, p2dt ) |
---|
599 | !!--------------------------------------------------------------------- |
---|
600 | !! *** ROUTINE nonosc *** |
---|
601 | !! |
---|
602 | !! ** Purpose : compute monotonic tracer fluxes from the upstream |
---|
603 | !! scheme and the before field by a nonoscillatory algorithm |
---|
604 | !! |
---|
605 | !! ** Method : ... ??? |
---|
606 | !! warning : pbef and paft must be masked, but the boundaries |
---|
607 | !! conditions on the fluxes are not necessary zalezak (1979) |
---|
608 | !! drange (1995) multi-dimensional forward-in-time and upstream- |
---|
609 | !! in-space based differencing for fluid |
---|
610 | !!---------------------------------------------------------------------- |
---|
611 | REAL(wp) , INTENT(in ) :: p2dt ! tracer time-step |
---|
612 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(in ) :: pbef, paft ! before & after field |
---|
613 | REAL(wp), DIMENSION (jpi,jpj,jpk), INTENT(inout) :: paa, pbb, pcc ! monotonic fluxes in the 3 directions |
---|
614 | ! |
---|
615 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
616 | INTEGER :: ikm1 ! local integer |
---|
617 | REAL(wp) :: zpos, zneg, zbt, za, zb, zc, zbig, zrtrn ! local scalars |
---|
618 | REAL(wp) :: zau, zbu, zcu, zav, zbv, zcv, zup, zdo ! - - |
---|
619 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zbetup, zbetdo, zbup, zbdo |
---|
620 | !!---------------------------------------------------------------------- |
---|
621 | ! |
---|
622 | IF( nn_timing == 1 ) CALL timing_start('nonosc') |
---|
623 | ! |
---|
624 | CALL wrk_alloc( jpi, jpj, jpk, zbetup, zbetdo, zbup, zbdo ) |
---|
625 | ! |
---|
626 | zbig = 1.e+40_wp |
---|
627 | zrtrn = 1.e-15_wp |
---|
628 | zbetup(:,:,:) = 0._wp ; zbetdo(:,:,:) = 0._wp |
---|
629 | |
---|
630 | ! Search local extrema |
---|
631 | ! -------------------- |
---|
632 | ! max/min of pbef & paft with large negative/positive value (-/+zbig) inside land |
---|
633 | zbup = MAX( pbef * tmask - zbig * ( 1._wp - tmask ), & |
---|
634 | & paft * tmask - zbig * ( 1._wp - tmask ) ) |
---|
635 | zbdo = MIN( pbef * tmask + zbig * ( 1._wp - tmask ), & |
---|
636 | & paft * tmask + zbig * ( 1._wp - tmask ) ) |
---|
637 | |
---|
638 | DO jk = 1, jpkm1 |
---|
639 | ikm1 = MAX(jk-1,1) |
---|
640 | DO jj = 2, jpjm1 |
---|
641 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
642 | |
---|
643 | ! search maximum in neighbourhood |
---|
644 | zup = MAX( zbup(ji ,jj ,jk ), & |
---|
645 | & zbup(ji-1,jj ,jk ), zbup(ji+1,jj ,jk ), & |
---|
646 | & zbup(ji ,jj-1,jk ), zbup(ji ,jj+1,jk ), & |
---|
647 | & zbup(ji ,jj ,ikm1), zbup(ji ,jj ,jk+1) ) |
---|
648 | |
---|
649 | ! search minimum in neighbourhood |
---|
650 | zdo = MIN( zbdo(ji ,jj ,jk ), & |
---|
651 | & zbdo(ji-1,jj ,jk ), zbdo(ji+1,jj ,jk ), & |
---|
652 | & zbdo(ji ,jj-1,jk ), zbdo(ji ,jj+1,jk ), & |
---|
653 | & zbdo(ji ,jj ,ikm1), zbdo(ji ,jj ,jk+1) ) |
---|
654 | |
---|
655 | ! positive part of the flux |
---|
656 | zpos = MAX( 0., paa(ji-1,jj ,jk ) ) - MIN( 0., paa(ji ,jj ,jk ) ) & |
---|
657 | & + MAX( 0., pbb(ji ,jj-1,jk ) ) - MIN( 0., pbb(ji ,jj ,jk ) ) & |
---|
658 | & + MAX( 0., pcc(ji ,jj ,jk+1) ) - MIN( 0., pcc(ji ,jj ,jk ) ) |
---|
659 | |
---|
660 | ! negative part of the flux |
---|
661 | zneg = MAX( 0., paa(ji ,jj ,jk ) ) - MIN( 0., paa(ji-1,jj ,jk ) ) & |
---|
662 | & + MAX( 0., pbb(ji ,jj ,jk ) ) - MIN( 0., pbb(ji ,jj-1,jk ) ) & |
---|
663 | & + MAX( 0., pcc(ji ,jj ,jk ) ) - MIN( 0., pcc(ji ,jj ,jk+1) ) |
---|
664 | |
---|
665 | ! up & down beta terms |
---|
666 | zbt = e1e2t(ji,jj) * e3t_n(ji,jj,jk) / p2dt |
---|
667 | zbetup(ji,jj,jk) = ( zup - paft(ji,jj,jk) ) / ( zpos + zrtrn ) * zbt |
---|
668 | zbetdo(ji,jj,jk) = ( paft(ji,jj,jk) - zdo ) / ( zneg + zrtrn ) * zbt |
---|
669 | END DO |
---|
670 | END DO |
---|
671 | END DO |
---|
672 | CALL lbc_lnk( zbetup, 'T', 1. ) ; CALL lbc_lnk( zbetdo, 'T', 1. ) ! lateral boundary cond. (unchanged sign) |
---|
673 | |
---|
674 | ! 3. monotonic flux in the i & j direction (paa & pbb) |
---|
675 | ! ---------------------------------------- |
---|
676 | DO jk = 1, jpkm1 |
---|
677 | DO jj = 2, jpjm1 |
---|
678 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
679 | zau = MIN( 1._wp, zbetdo(ji,jj,jk), zbetup(ji+1,jj,jk) ) |
---|
680 | zbu = MIN( 1._wp, zbetup(ji,jj,jk), zbetdo(ji+1,jj,jk) ) |
---|
681 | zcu = ( 0.5 + SIGN( 0.5 , paa(ji,jj,jk) ) ) |
---|
682 | paa(ji,jj,jk) = paa(ji,jj,jk) * ( zcu * zau + ( 1._wp - zcu) * zbu ) |
---|
683 | |
---|
684 | zav = MIN( 1._wp, zbetdo(ji,jj,jk), zbetup(ji,jj+1,jk) ) |
---|
685 | zbv = MIN( 1._wp, zbetup(ji,jj,jk), zbetdo(ji,jj+1,jk) ) |
---|
686 | zcv = ( 0.5 + SIGN( 0.5 , pbb(ji,jj,jk) ) ) |
---|
687 | pbb(ji,jj,jk) = pbb(ji,jj,jk) * ( zcv * zav + ( 1._wp - zcv) * zbv ) |
---|
688 | |
---|
689 | ! monotonic flux in the k direction, i.e. pcc |
---|
690 | ! ------------------------------------------- |
---|
691 | za = MIN( 1., zbetdo(ji,jj,jk+1), zbetup(ji,jj,jk) ) |
---|
692 | zb = MIN( 1., zbetup(ji,jj,jk+1), zbetdo(ji,jj,jk) ) |
---|
693 | zc = ( 0.5 + SIGN( 0.5 , pcc(ji,jj,jk+1) ) ) |
---|
694 | pcc(ji,jj,jk+1) = pcc(ji,jj,jk+1) * ( zc * za + ( 1._wp - zc) * zb ) |
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695 | END DO |
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696 | END DO |
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697 | END DO |
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698 | CALL lbc_lnk( paa, 'U', -1. ) ; CALL lbc_lnk( pbb, 'V', -1. ) ! lateral boundary condition (changed sign) |
---|
699 | ! |
---|
700 | CALL wrk_dealloc( jpi, jpj, jpk, zbetup, zbetdo, zbup, zbdo ) |
---|
701 | ! |
---|
702 | IF( nn_timing == 1 ) CALL timing_stop('nonosc') |
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703 | ! |
---|
704 | END SUBROUTINE nonosc |
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705 | |
---|
706 | |
---|
707 | SUBROUTINE interp_4th_cpt( pt_in, pt_out ) |
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708 | !!---------------------------------------------------------------------- |
---|
709 | !! *** ROUTINE interp_4th_cpt *** |
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710 | !! |
---|
711 | !! ** Purpose : Compute the interpolation of tracer at w-point |
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712 | !! |
---|
713 | !! ** Method : 4th order compact interpolation |
---|
714 | !!---------------------------------------------------------------------- |
---|
715 | REAL(wp),DIMENSION(jpi,jpj,jpk), INTENT(in ) :: pt_in ! now tracer fields |
---|
716 | REAL(wp),DIMENSION(jpi,jpj,jpk), INTENT( out) :: pt_out ! now tracer field interpolated at w-pts |
---|
717 | ! |
---|
718 | INTEGER :: ji, jj, jk ! dummy loop integers |
---|
719 | REAL(wp),DIMENSION(jpi,jpj,jpk) :: zwd, zwi, zws, zwrm, zwt |
---|
720 | !!---------------------------------------------------------------------- |
---|
721 | |
---|
722 | DO jk = 3, jpkm1 !== build the three diagonal matrix ==! |
---|
723 | DO jj = 1, jpj |
---|
724 | DO ji = 1, jpi |
---|
725 | zwd (ji,jj,jk) = 4._wp |
---|
726 | zwi (ji,jj,jk) = 1._wp |
---|
727 | zws (ji,jj,jk) = 1._wp |
---|
728 | zwrm(ji,jj,jk) = 3._wp * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
729 | ! |
---|
730 | IF( tmask(ji,jj,jk+1) == 0._wp) THEN ! Switch to second order centered at bottom |
---|
731 | zwd (ji,jj,jk) = 1._wp |
---|
732 | zwi (ji,jj,jk) = 0._wp |
---|
733 | zws (ji,jj,jk) = 0._wp |
---|
734 | zwrm(ji,jj,jk) = 0.5 * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
735 | ENDIF |
---|
736 | END DO |
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737 | END DO |
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738 | END DO |
---|
739 | ! |
---|
740 | jk=2 ! Switch to second order centered at top |
---|
741 | DO jj=1,jpj |
---|
742 | DO ji=1,jpi |
---|
743 | zwd (ji,jj,jk) = 1._wp |
---|
744 | zwi (ji,jj,jk) = 0._wp |
---|
745 | zws (ji,jj,jk) = 0._wp |
---|
746 | zwrm(ji,jj,jk) = 0.5 * ( pt_in(ji,jj,jk-1) + pt_in(ji,jj,jk) ) |
---|
747 | END DO |
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748 | END DO |
---|
749 | ! |
---|
750 | ! !== tridiagonal solve ==! |
---|
751 | DO jj = 1, jpj ! first recurrence |
---|
752 | DO ji = 1, jpi |
---|
753 | zwt(ji,jj,2) = zwd(ji,jj,2) |
---|
754 | END DO |
---|
755 | END DO |
---|
756 | DO jk = 3, jpkm1 |
---|
757 | DO jj = 1, jpj |
---|
758 | DO ji = 1, jpi |
---|
759 | zwt(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) /zwt(ji,jj,jk-1) |
---|
760 | END DO |
---|
761 | END DO |
---|
762 | END DO |
---|
763 | ! |
---|
764 | DO jj = 1, jpj ! second recurrence: Zk = Yk - Ik / Tk-1 Zk-1 |
---|
765 | DO ji = 1, jpi |
---|
766 | pt_out(ji,jj,2) = zwrm(ji,jj,2) |
---|
767 | END DO |
---|
768 | END DO |
---|
769 | DO jk = 3, jpkm1 |
---|
770 | DO jj = 1, jpj |
---|
771 | DO ji = 1, jpi |
---|
772 | pt_out(ji,jj,jk) = zwrm(ji,jj,jk) - zwi(ji,jj,jk) / zwt(ji,jj,jk-1) *pt_out(ji,jj,jk-1) |
---|
773 | END DO |
---|
774 | END DO |
---|
775 | END DO |
---|
776 | |
---|
777 | DO jj = 1, jpj ! third recurrence: Xk = (Zk - Sk Xk+1 ) / Tk |
---|
778 | DO ji = 1, jpi |
---|
779 | pt_out(ji,jj,jpkm1) = pt_out(ji,jj,jpkm1) / zwt(ji,jj,jpkm1) |
---|
780 | END DO |
---|
781 | END DO |
---|
782 | DO jk = jpk-2, 2, -1 |
---|
783 | DO jj = 1, jpj |
---|
784 | DO ji = 1, jpi |
---|
785 | pt_out(ji,jj,jk) = ( pt_out(ji,jj,jk) - zws(ji,jj,jk) * pt_out(ji,jj,jk+1) ) / zwt(ji,jj,jk) |
---|
786 | END DO |
---|
787 | END DO |
---|
788 | END DO |
---|
789 | ! |
---|
790 | END SUBROUTINE interp_4th_cpt |
---|
791 | |
---|
792 | !!====================================================================== |
---|
793 | END MODULE traadv_fct |
---|