1 | MODULE p2zexp |
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2 | !!====================================================================== |
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3 | !! *** MODULE p2zsed *** |
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4 | !! TOP : LOBSTER Compute loss of organic matter in the sediments |
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5 | !!====================================================================== |
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6 | !! History : - ! 1999 (O. Aumont, C. Le Quere) original code |
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7 | !! - ! 2001-05 (O. Aumont, E. Kestenare) add sediment computations |
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8 | !! 1.0 ! 2005-06 (A.-S. Kremeur) new temporal integration for sedpoc |
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9 | !! 2.0 ! 2007-12 (C. Deltel, G. Madec) F90 |
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10 | !! 3.5 ! 2012-03 (C. Ethe) Merge PISCES-LOBSTER |
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11 | !!---------------------------------------------------------------------- |
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12 | !! p2z_exp : Compute loss of organic matter in the sediments |
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13 | !!---------------------------------------------------------------------- |
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14 | USE oce_trc ! |
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15 | USE trc |
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16 | USE sms_pisces |
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17 | USE p2zsed |
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18 | USE lbclnk |
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19 | USE prtctl_trc ! Print control for debbuging |
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20 | USE trd_oce |
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21 | USE trdtrc |
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22 | USE iom |
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23 | |
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24 | IMPLICIT NONE |
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25 | PRIVATE |
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26 | |
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27 | PUBLIC p2z_exp |
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28 | PUBLIC p2z_exp_init |
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29 | PUBLIC p2z_exp_alloc |
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30 | |
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31 | ! |
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32 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: dminl !: fraction of sinking POC released in sediments |
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33 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: dmin3 !: fraction of sinking POC released at each level |
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34 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: sedpocb !: mass of POC in sediments |
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35 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: sedpocn !: mass of POC in sediments |
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36 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: cmask !: Coastal mask area |
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37 | REAL(wp) :: areacot !: surface coastal area |
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38 | |
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39 | !! * Substitutions |
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40 | # include "vectopt_loop_substitute.h90" |
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41 | !!---------------------------------------------------------------------- |
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42 | !! NEMO/TOP 4.0 , NEMO Consortium (2018) |
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43 | !! $Id$ |
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44 | !! Software governed by the CeCILL license (see ./LICENSE) |
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45 | !!---------------------------------------------------------------------- |
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46 | CONTAINS |
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47 | |
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48 | SUBROUTINE p2z_exp( kt ) |
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49 | !!--------------------------------------------------------------------- |
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50 | !! *** ROUTINE p2z_exp *** |
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51 | !! |
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52 | !! ** Purpose : MODELS EXPORT OF BIOGENIC MATTER (POC ''SOFT |
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53 | !! TISSUE'') AND ITS DISTRIBUTION IN WATER COLUMN |
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54 | !! |
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55 | !! ** Method : - IN THE SURFACE LAYER POC IS PRODUCED ACCORDING TO |
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56 | !! NURTRIENTS AVAILABLE AND GROWTH CONDITIONS. NUTRIENT UPTAKE |
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57 | !! KINETICS FOLLOW MICHAELIS-MENTON FORMULATION. |
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58 | !! THE TOTAL PARTICLE AMOUNT PRODUCED, IS DISTRIBUTED IN THE WATER |
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59 | !! COLUMN BELOW THE SURFACE LAYER. |
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60 | !!--------------------------------------------------------------------- |
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61 | !! |
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62 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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63 | !! |
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64 | INTEGER :: ji, jj, jk, jl, ikt |
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65 | REAL(wp) :: zgeolpoc, zfact, zwork, ze3t, zsedpocd, zmaskt |
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66 | REAL(wp), DIMENSION(jpi,jpj) :: zsedpoca |
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67 | CHARACTER (len=25) :: charout |
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68 | !!--------------------------------------------------------------------- |
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69 | ! |
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70 | IF( ln_timing ) CALL timing_start('p2z_exp') |
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71 | ! |
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72 | IF( kt == nittrc000 ) CALL p2z_exp_init |
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73 | |
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74 | zsedpoca(:,:) = 0. |
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75 | |
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76 | |
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77 | ! VERTICAL DISTRIBUTION OF NEWLY PRODUCED BIOGENIC |
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78 | ! POC IN THE WATER COLUMN |
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79 | ! (PARTS OF NEWLY FORMED MATTER REMAINING IN THE DIFFERENT |
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80 | ! LAYERS IS DETERMINED BY DMIN3 DEFINED IN sms_p2z.F90 |
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81 | ! ---------------------------------------------------------------------- |
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82 | DO jk = 1, jpkm1 |
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83 | DO jj = 2, jpjm1 |
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84 | DO ji = fs_2, fs_jpim1 |
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85 | ze3t = 1. / e3t_n(ji,jj,jk) |
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86 | tra(ji,jj,jk,jpno3) = tra(ji,jj,jk,jpno3) + ze3t * dmin3(ji,jj,jk) * xksi(ji,jj) |
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87 | END DO |
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88 | END DO |
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89 | END DO |
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90 | |
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91 | ! Find the last level of the water column |
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92 | ! Compute fluxes due to sinking particles (slow) |
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93 | |
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94 | |
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95 | zgeolpoc = 0.e0 ! Initialization |
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96 | ! Release of nutrients from the "simple" sediment |
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97 | DO jj = 2, jpjm1 |
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98 | DO ji = fs_2, fs_jpim1 |
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99 | ikt = mbkt(ji,jj) |
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100 | tra(ji,jj,ikt,jpno3) = tra(ji,jj,ikt,jpno3) + sedlam * sedpocn(ji,jj) / e3t_n(ji,jj,ikt) |
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101 | ! Deposition of organic matter in the sediment |
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102 | zwork = vsed * trn(ji,jj,ikt,jpdet) |
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103 | zsedpoca(ji,jj) = ( zwork + dminl(ji,jj) * xksi(ji,jj) & |
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104 | & - sedlam * sedpocn(ji,jj) - sedlostpoc * sedpocn(ji,jj) ) * rdt |
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105 | zgeolpoc = zgeolpoc + sedlostpoc * sedpocn(ji,jj) * e1e2t(ji,jj) |
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106 | END DO |
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107 | END DO |
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108 | |
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109 | DO jj = 2, jpjm1 |
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110 | DO ji = fs_2, fs_jpim1 |
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111 | tra(ji,jj,1,jpno3) = tra(ji,jj,1,jpno3) + zgeolpoc * cmask(ji,jj) / areacot / e3t_n(ji,jj,1) |
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112 | END DO |
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113 | END DO |
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114 | |
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115 | CALL lbc_lnk( 'p2zexp', sedpocn, 'T', 1. ) |
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116 | |
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117 | ! Oa & Ek: diagnostics depending on jpdia2d ! left as example |
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118 | IF( lk_iomput ) CALL iom_put( "SEDPOC" , sedpocn ) |
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119 | |
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120 | |
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121 | ! Time filter and swap of arrays |
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122 | ! ------------------------------ |
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123 | IF( neuler == 0 .AND. kt == nittrc000 ) THEN ! Euler time-stepping at first time-step |
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124 | ! ! (only swap) |
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125 | sedpocn(:,:) = zsedpoca(:,:) |
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126 | ! |
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127 | ELSE |
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128 | ! |
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129 | DO jj = 1, jpj |
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130 | DO ji = 1, jpi |
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131 | zsedpocd = zsedpoca(ji,jj) - 2. * sedpocn(ji,jj) + sedpocb(ji,jj) ! time laplacian on tracers |
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132 | sedpocb(ji,jj) = sedpocn(ji,jj) + atfp * zsedpocd ! sedpocb <-- filtered sedpocn |
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133 | sedpocn(ji,jj) = zsedpoca(ji,jj) ! sedpocn <-- sedpoca |
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134 | END DO |
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135 | END DO |
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136 | ! |
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137 | ENDIF |
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138 | ! |
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139 | IF( lrst_trc ) THEN |
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140 | IF(lwp) WRITE(numout,*) |
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141 | IF(lwp) WRITE(numout,*) 'p2z_exp : POC in sediment fields written in ocean restart file ', & |
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142 | & 'at it= ', kt,' date= ', ndastp |
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143 | IF(lwp) WRITE(numout,*) '~~~~' |
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144 | CALL iom_rstput( kt, nitrst, numrtw, 'SEDB'//ctrcnm(jpdet), sedpocb(:,:) ) |
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145 | CALL iom_rstput( kt, nitrst, numrtw, 'SEDN'//ctrcnm(jpdet), sedpocn(:,:) ) |
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146 | ENDIF |
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147 | ! |
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148 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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149 | WRITE(charout, FMT="('exp')") |
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150 | CALL prt_ctl_trc_info(charout) |
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151 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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152 | ENDIF |
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153 | ! |
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154 | IF( ln_timing ) CALL timing_stop('p2z_exp') |
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155 | ! |
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156 | END SUBROUTINE p2z_exp |
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157 | |
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158 | |
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159 | SUBROUTINE p2z_exp_init |
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160 | !!---------------------------------------------------------------------- |
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161 | !! *** ROUTINE p4z_exp_init *** |
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162 | !! ** purpose : specific initialisation for export |
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163 | !!---------------------------------------------------------------------- |
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164 | INTEGER :: ji, jj, jk |
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165 | REAL(wp) :: zmaskt, zfluo, zfluu |
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166 | REAL(wp), DIMENSION(jpi,jpj ) :: zrro |
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167 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zdm0 |
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168 | !!--------------------------------------------------------------------- |
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169 | ! |
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170 | IF(lwp) THEN |
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171 | WRITE(numout,*) |
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172 | WRITE(numout,*) ' p2z_exp: LOBSTER export' |
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173 | WRITE(numout,*) ' ~~~~~~~' |
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174 | WRITE(numout,*) ' compute remineralisation-damping arrays for tracers' |
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175 | ENDIF |
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176 | ! |
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177 | |
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178 | ! Calculate vertical distribution of newly formed biogenic poc |
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179 | ! in the water column in the case of max. possible bottom depth |
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180 | ! ------------------------------------------------------------ |
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181 | zdm0 = 0._wp |
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182 | zrro = 1._wp |
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183 | DO jk = jpkb, jpkm1 |
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184 | DO jj = 1, jpj |
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185 | DO ji = 1, jpi |
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186 | zfluo = ( gdepw_n(ji,jj,jk ) / gdepw_n(ji,jj,jpkb) )**xhr |
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187 | zfluu = ( gdepw_n(ji,jj,jk+1) / gdepw_n(ji,jj,jpkb) )**xhr |
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188 | IF( zfluo.GT.1. ) zfluo = 1._wp |
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189 | zdm0(ji,jj,jk) = zfluo - zfluu |
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190 | IF( jk <= jpkb-1 ) zdm0(ji,jj,jk) = 0._wp |
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191 | zrro(ji,jj) = zrro(ji,jj) - zdm0(ji,jj,jk) |
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192 | END DO |
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193 | END DO |
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194 | END DO |
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195 | ! |
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196 | zdm0(:,:,jpk) = zrro(:,:) |
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197 | |
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198 | ! Calculate vertical distribution of newly formed biogenic poc |
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199 | ! in the water column with realistic topography (first "dry" layer |
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200 | ! contains total fraction, which has passed to the upper layers) |
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201 | ! ---------------------------------------------------------------------- |
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202 | dminl(:,:) = 0._wp |
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203 | dmin3(:,:,:) = zdm0 |
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204 | DO jk = 1, jpk |
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205 | DO jj = 1, jpj |
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206 | DO ji = 1, jpi |
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207 | IF( tmask(ji,jj,jk) == 0._wp ) THEN |
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208 | dminl(ji,jj) = dminl(ji,jj) + dmin3(ji,jj,jk) |
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209 | dmin3(ji,jj,jk) = 0._wp |
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210 | ENDIF |
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211 | END DO |
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212 | END DO |
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213 | END DO |
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214 | |
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215 | DO jj = 1, jpj |
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216 | DO ji = 1, jpi |
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217 | IF( tmask(ji,jj,1) == 0 ) dmin3(ji,jj,1) = 0._wp |
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218 | END DO |
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219 | END DO |
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220 | |
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221 | ! Coastal mask |
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222 | cmask(:,:) = 0._wp |
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223 | DO jj = 2, jpjm1 |
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224 | DO ji = fs_2, fs_jpim1 |
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225 | IF( tmask(ji,jj,1) /= 0. ) THEN |
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226 | zmaskt = tmask(ji+1,jj,1) * tmask(ji-1,jj,1) * tmask(ji,jj+1,1) * tmask(ji,jj-1,1) |
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227 | IF( zmaskt == 0. ) cmask(ji,jj) = 1._wp |
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228 | END IF |
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229 | END DO |
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230 | END DO |
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231 | CALL lbc_lnk( 'p2zexp', cmask , 'T', 1. ) ! lateral boundary conditions on cmask (sign unchanged) |
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232 | areacot = glob_sum( 'p2zexp', e1e2t(:,:) * cmask(:,:) ) |
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233 | ! |
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234 | IF( ln_rsttr ) THEN |
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235 | CALL iom_get( numrtr, jpdom_autoglo, 'SEDB'//ctrcnm(jpdet), sedpocb(:,:) ) |
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236 | CALL iom_get( numrtr, jpdom_autoglo, 'SEDN'//ctrcnm(jpdet), sedpocn(:,:) ) |
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237 | ELSE |
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238 | sedpocb(:,:) = 0._wp |
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239 | sedpocn(:,:) = 0._wp |
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240 | ENDIF |
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241 | ! |
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242 | END SUBROUTINE p2z_exp_init |
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243 | |
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244 | INTEGER FUNCTION p2z_exp_alloc() |
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245 | !!---------------------------------------------------------------------- |
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246 | !! *** ROUTINE p2z_exp_alloc *** |
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247 | !!---------------------------------------------------------------------- |
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248 | ALLOCATE( cmask(jpi,jpj) , dminl(jpi,jpj) , dmin3(jpi,jpj,jpk), & |
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249 | & sedpocb(jpi,jpj) , sedpocn(jpi,jpj), STAT=p2z_exp_alloc ) |
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250 | IF( p2z_exp_alloc /= 0 ) CALL ctl_stop( 'STOP', 'p2z_exp_alloc : failed to allocate arrays.' ) |
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251 | ! |
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252 | END FUNCTION p2z_exp_alloc |
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253 | |
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254 | !!====================================================================== |
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255 | END MODULE p2zexp |
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