1 | MODULE p4zsink |
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2 | !!====================================================================== |
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3 | !! *** MODULE p4zsink *** |
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4 | !! TOP : PISCES vertical flux of particulate matter due to |
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5 | !! gravitational sinking |
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6 | !! This module is the same for both PISCES and PISCES-QUOTA |
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7 | !!====================================================================== |
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8 | !! History : 1.0 ! 2004 (O. Aumont) Original code |
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9 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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10 | !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Change aggregation formula |
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11 | !! 3.5 ! 2012-07 (O. Aumont) Introduce potential time-splitting |
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12 | !! 4.0 ! 2019 (O. Aumont) an external subroutine is called |
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13 | !! to compute the impact of sinking |
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14 | !!---------------------------------------------------------------------- |
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15 | !! p4z_sink : Compute vertical flux of particulate matter due to gravitational sinking |
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16 | !! p4z_sink_init : Unitialisation of sinking speed parameters |
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17 | !! p4z_sink_alloc : Allocate sinking speed variables |
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18 | !!---------------------------------------------------------------------- |
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19 | USE oce_trc ! shared variables between ocean and passive tracers |
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20 | USE trc ! passive tracers common variables |
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21 | USE sms_pisces ! PISCES Source Minus Sink variables |
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22 | USE trcsink ! General routine to compute sedimentation |
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23 | USE prtctl_trc ! print control for debugging |
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24 | USE iom ! I/O manager |
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25 | USE lib_mpp |
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26 | |
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27 | IMPLICIT NONE |
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28 | PRIVATE |
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29 | |
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30 | PUBLIC p4z_sink ! called in p4zbio.F90 |
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31 | PUBLIC p4z_sink_init ! called in trcini_pisces.F90 |
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32 | PUBLIC p4z_sink_alloc ! called in trcini_pisces.F90 |
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33 | |
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34 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinking, sinking2 !: POC sinking fluxes |
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35 | ! ! (different meanings depending on the parameterization) |
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36 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkingn, sinking2n !: PON sinking fluxes |
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37 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkingp, sinking2p !: POP sinking fluxes |
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38 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkcal, sinksil !: CaCO3 and BSi sinking fluxes |
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39 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkfer !: Small BFe sinking fluxes |
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40 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkfer2 !: Big iron sinking fluxes |
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41 | |
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42 | INTEGER :: ik100 |
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43 | |
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44 | !!---------------------------------------------------------------------- |
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45 | !! NEMO/TOP 4.0 , NEMO Consortium (2018) |
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46 | !! $Id$ |
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47 | !! Software governed by the CeCILL license (see ./LICENSE) |
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48 | !!---------------------------------------------------------------------- |
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49 | CONTAINS |
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50 | |
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51 | SUBROUTINE p4z_sink ( kt, knt ) |
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52 | !!--------------------------------------------------------------------- |
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53 | !! *** ROUTINE p4z_sink *** |
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54 | !! |
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55 | !! ** Purpose : Compute vertical flux of particulate matter due to |
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56 | !! gravitational sinking. |
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57 | !! |
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58 | !! ** Method : - An external advection subroutine is called to compute |
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59 | !! the impact of sinking on the particles. The tracers |
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60 | !! concentrations are updated in this subroutine which |
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61 | !! is mandatory to deal with negative concentrations |
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62 | !!--------------------------------------------------------------------- |
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63 | INTEGER, INTENT(in) :: kt, knt |
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64 | INTEGER :: ji, jj, jk |
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65 | CHARACTER (len=25) :: charout |
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66 | REAL(wp) :: zmax, zfact |
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67 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: zw3d |
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68 | REAL(wp), ALLOCATABLE, DIMENSION(:,: ) :: zw2d |
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69 | !!--------------------------------------------------------------------- |
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70 | ! |
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71 | IF( ln_timing ) CALL timing_start('p4z_sink') |
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72 | |
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73 | ! Initialization of some global variables |
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74 | ! --------------------------------------- |
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75 | prodpoc(:,:,:) = 0. |
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76 | conspoc(:,:,:) = 0. |
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77 | prodgoc(:,:,:) = 0. |
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78 | consgoc(:,:,:) = 0. |
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79 | |
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80 | ! Sinking speeds of big detritus is increased with depth as shown |
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81 | ! by data and from the coagulation theory. This is controled by |
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82 | ! wsbio2max and wsbio2scale. If wsbio2max is set to wsbio2, then |
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83 | ! sinking speed is constant with depth. |
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84 | ! CaCO3 and bSi are supposed to sink at the big particles speed |
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85 | ! due to their high density |
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86 | ! --------------------------------------------------------------- |
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87 | DO jk = 1, jpkm1 |
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88 | DO jj = 1, jpj |
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89 | DO ji = 1,jpi |
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90 | zmax = MAX( heup_01(ji,jj), hmld(ji,jj) ) |
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91 | zfact = MAX( 0., gdepw_n(ji,jj,jk+1) - zmax ) / wsbio2scale |
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92 | wsbio4(ji,jj,jk) = wsbio2 + MAX(0., ( wsbio2max - wsbio2 )) * zfact |
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93 | END DO |
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94 | END DO |
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95 | END DO |
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96 | |
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97 | ! Sinking speed of the small particles is always constant |
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98 | wsbio3(:,:,:) = wsbio |
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99 | |
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100 | ! Initialize to zero all the sinking arrays |
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101 | ! ----------------------------------------- |
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102 | sinking (:,:,:) = 0.e0 |
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103 | sinking2(:,:,:) = 0.e0 |
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104 | sinkcal (:,:,:) = 0.e0 |
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105 | sinkfer (:,:,:) = 0.e0 |
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106 | sinksil (:,:,:) = 0.e0 |
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107 | sinkfer2(:,:,:) = 0.e0 |
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108 | |
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109 | ! Compute the sedimentation term using trc_sink for all the sinking particles |
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110 | ! --------------------------------------------------------------------------- |
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111 | CALL trc_sink( kt, wsbio3, sinking , jppoc, rfact2 ) |
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112 | CALL trc_sink( kt, wsbio3, sinkfer , jpsfe, rfact2 ) |
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113 | CALL trc_sink( kt, wsbio4, sinking2, jpgoc, rfact2 ) |
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114 | CALL trc_sink( kt, wsbio4, sinkfer2, jpbfe, rfact2 ) |
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115 | CALL trc_sink( kt, wsbio4, sinksil , jpgsi, rfact2 ) |
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116 | CALL trc_sink( kt, wsbio4, sinkcal , jpcal, rfact2 ) |
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117 | |
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118 | ! PISCES-QUOTA part |
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119 | IF( ln_p5z ) THEN |
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120 | sinkingn (:,:,:) = 0.e0 |
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121 | sinking2n(:,:,:) = 0.e0 |
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122 | sinkingp (:,:,:) = 0.e0 |
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123 | sinking2p(:,:,:) = 0.e0 |
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124 | |
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125 | ! Compute the sedimentation term using trc_sink for all the sinking particles |
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126 | ! --------------------------------------------------------------------------- |
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127 | CALL trc_sink( kt, wsbio3, sinkingn , jppon, rfact2 ) |
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128 | CALL trc_sink( kt, wsbio3, sinkingp , jppop, rfact2 ) |
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129 | CALL trc_sink( kt, wsbio4, sinking2n, jpgon, rfact2 ) |
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130 | CALL trc_sink( kt, wsbio4, sinking2p, jpgop, rfact2 ) |
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131 | ENDIF |
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132 | |
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133 | ! Total carbon export per year |
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134 | IF( iom_use( "tcexp" ) .OR. ( ln_check_mass .AND. kt == nitend .AND. knt == nrdttrc ) ) & |
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135 | & t_oce_co2_exp = glob_sum( 'p4zsink', ( sinking(:,:,ik100) + sinking2(:,:,ik100) ) * e1e2t(:,:) * tmask(:,:,1) ) |
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136 | ! |
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137 | IF( lk_iomput ) THEN |
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138 | IF( knt == nrdttrc ) THEN |
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139 | ALLOCATE( zw2d(jpi,jpj), zw3d(jpi,jpj,jpk) ) |
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140 | zfact = 1.e+3 * rfact2r ! conversion from mol/l/kt to mol/m3/s |
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141 | ! |
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142 | IF( iom_use( "EPC100" ) ) THEN |
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143 | zw2d(:,:) = ( sinking(:,:,ik100) + sinking2(:,:,ik100) ) * zfact * tmask(:,:,1) ! Export of carbon at 100m |
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144 | CALL iom_put( "EPC100" , zw2d ) |
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145 | ENDIF |
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146 | IF( iom_use( "EPFE100" ) ) THEN |
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147 | zw2d(:,:) = ( sinkfer(:,:,ik100) + sinkfer2(:,:,ik100) ) * zfact * tmask(:,:,1) ! Export of iron at 100m |
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148 | CALL iom_put( "EPFE100" , zw2d ) |
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149 | ENDIF |
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150 | IF( iom_use( "EPCAL100" ) ) THEN |
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151 | zw2d(:,:) = sinkcal(:,:,ik100) * zfact * tmask(:,:,1) ! Export of calcite at 100m |
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152 | CALL iom_put( "EPCAL100" , zw2d ) |
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153 | ENDIF |
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154 | IF( iom_use( "EPSI100" ) ) THEN |
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155 | zw2d(:,:) = sinksil(:,:,ik100) * zfact * tmask(:,:,1) ! Export of bigenic silica at 100m |
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156 | CALL iom_put( "EPSI100" , zw2d ) |
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157 | ENDIF |
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158 | IF( iom_use( "EXPC" ) ) THEN |
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159 | zw3d(:,:,:) = ( sinking(:,:,:) + sinking2(:,:,:) ) * zfact * tmask(:,:,:) ! Export of carbon in the water column |
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160 | CALL iom_put( "EXPC" , zw3d ) |
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161 | ENDIF |
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162 | IF( iom_use( "EXPFE" ) ) THEN |
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163 | zw3d(:,:,:) = ( sinkfer(:,:,:) + sinkfer2(:,:,:) ) * zfact * tmask(:,:,:) ! Export of iron |
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164 | CALL iom_put( "EXPFE" , zw3d ) |
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165 | ENDIF |
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166 | IF( iom_use( "EXPCAL" ) ) THEN |
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167 | zw3d(:,:,:) = sinkcal(:,:,:) * zfact * tmask(:,:,:) ! Export of calcite |
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168 | CALL iom_put( "EXPCAL" , zw3d ) |
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169 | ENDIF |
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170 | IF( iom_use( "EXPSI" ) ) THEN |
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171 | zw3d(:,:,:) = sinksil(:,:,:) * zfact * tmask(:,:,:) ! Export of bigenic silica |
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172 | CALL iom_put( "EXPSI" , zw3d ) |
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173 | ENDIF |
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174 | IF( iom_use( "tcexp" ) ) CALL iom_put( "tcexp" , t_oce_co2_exp * zfact ) ! molC/s |
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175 | ! |
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176 | DEALLOCATE( zw2d, zw3d ) |
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177 | ENDIF |
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178 | ENDIF |
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179 | ! |
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180 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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181 | WRITE(charout, FMT="('sink')") |
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182 | CALL prt_ctl_trc_info(charout) |
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183 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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184 | ENDIF |
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185 | ! |
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186 | IF( ln_timing ) CALL timing_stop('p4z_sink') |
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187 | ! |
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188 | END SUBROUTINE p4z_sink |
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189 | |
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190 | |
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191 | SUBROUTINE p4z_sink_init |
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192 | !!---------------------------------------------------------------------- |
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193 | !! *** ROUTINE p4z_sink_init *** |
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194 | !! |
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195 | !! ** Purpose : Initialization of sinking parameters |
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196 | !! |
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197 | !! ** Method : |
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198 | !! |
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199 | !! ** input : |
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200 | !!---------------------------------------------------------------------- |
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201 | INTEGER :: jk |
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202 | !!---------------------------------------------------------------------- |
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203 | ! |
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204 | ik100 = 10 ! last level where depth less than 100 m |
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205 | DO jk = jpkm1, 1, -1 |
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206 | IF( gdept_1d(jk) > 100. ) ik100 = jk - 1 |
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207 | END DO |
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208 | IF (lwp) WRITE(numout,*) |
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209 | IF (lwp) WRITE(numout,*) ' Level corresponding to 100m depth ', ik100 + 1 |
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210 | IF (lwp) WRITE(numout,*) |
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211 | ! |
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212 | t_oce_co2_exp = 0._wp |
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213 | ! |
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214 | END SUBROUTINE p4z_sink_init |
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215 | |
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216 | INTEGER FUNCTION p4z_sink_alloc() |
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217 | !!---------------------------------------------------------------------- |
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218 | !! *** ROUTINE p4z_sink_alloc *** |
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219 | !!---------------------------------------------------------------------- |
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220 | INTEGER :: ierr(2) |
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221 | !!---------------------------------------------------------------------- |
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222 | ! |
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223 | ierr(:) = 0 |
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224 | ! |
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225 | ALLOCATE( sinking(jpi,jpj,jpk) , sinking2(jpi,jpj,jpk) , & |
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226 | & sinkcal(jpi,jpj,jpk) , sinksil (jpi,jpj,jpk) , & |
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227 | & sinkfer2(jpi,jpj,jpk) , & |
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228 | & sinkfer(jpi,jpj,jpk) , STAT=ierr(1) ) |
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229 | ! |
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230 | IF( ln_p5z ) ALLOCATE( sinkingn(jpi,jpj,jpk), sinking2n(jpi,jpj,jpk) , & |
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231 | & sinkingp(jpi,jpj,jpk), sinking2p(jpi,jpj,jpk) , STAT=ierr(2) ) |
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232 | ! |
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233 | p4z_sink_alloc = MAXVAL( ierr ) |
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234 | IF( p4z_sink_alloc /= 0 ) CALL ctl_stop( 'STOP', 'p4z_sink_alloc : failed to allocate arrays.' ) |
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235 | ! |
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236 | END FUNCTION p4z_sink_alloc |
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237 | |
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238 | !!====================================================================== |
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239 | END MODULE p4zsink |
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