1 | MODULE p4zmicro |
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2 | !!====================================================================== |
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3 | !! *** MODULE p4zmicro *** |
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4 | !! TOP : PISCES Compute the sources/sinks for microzooplankton |
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5 | !!====================================================================== |
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6 | !! History : 1.0 ! 2004 (O. Aumont) Original code |
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7 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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8 | !!---------------------------------------------------------------------- |
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9 | #if defined key_pisces |
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10 | !!---------------------------------------------------------------------- |
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11 | !! 'key_pisces' PISCES bio-model |
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12 | !!---------------------------------------------------------------------- |
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13 | !! p4z_micro : Compute the sources/sinks for microzooplankton |
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14 | !! p4z_micro_init : Initialize and read the appropriate namelist |
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15 | !!---------------------------------------------------------------------- |
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16 | USE oce_trc ! shared variables between ocean and passive tracers |
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17 | USE trc ! passive tracers common variables |
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18 | USE sms_pisces ! PISCES Source Minus Sink variables |
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19 | USE p4zsink ! vertical flux of particulate matter due to sinking |
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20 | USE prtctl_trc ! print control for debugging |
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21 | |
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22 | IMPLICIT NONE |
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23 | PRIVATE |
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24 | |
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25 | PUBLIC p4z_micro ! called in p4zbio.F90 |
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26 | PUBLIC p4z_micro_init ! called in trcsms_pisces.F90 |
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27 | PUBLIC p4z_micro_alloc ! called in trcsms_pisces.F90 |
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28 | |
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29 | !! * Shared module variables |
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30 | REAL(wp), PUBLIC :: & |
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31 | xpref2c = 0.0_wp , & !: |
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32 | xpref2p = 0.5_wp , & !: |
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33 | xpref2d = 0.5_wp , & !: |
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34 | resrat = 0.03_wp , & !: |
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35 | mzrat = 0.0_wp , & !: |
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36 | grazrat = 4.0_wp , & !: |
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37 | xkgraz = 20E-6_wp , & !: |
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38 | unass = 0.3_wp , & !: |
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39 | sigma1 = 0.6_wp , & !: |
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40 | epsher = 0.33_wp |
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41 | |
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42 | |
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43 | !!* Substitution |
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44 | # include "top_substitute.h90" |
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45 | !!---------------------------------------------------------------------- |
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46 | !! NEMO/TOP 3.3 , NEMO Consortium (2010) |
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47 | !! $Id$ |
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48 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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49 | !!---------------------------------------------------------------------- |
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50 | |
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51 | CONTAINS |
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52 | |
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53 | SUBROUTINE p4z_micro( kt ) |
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54 | !!--------------------------------------------------------------------- |
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55 | !! *** ROUTINE p4z_micro *** |
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56 | !! |
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57 | !! ** Purpose : Compute the sources/sinks for microzooplankton |
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58 | !! |
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59 | !! ** Method : - ??? |
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60 | !!--------------------------------------------------------------------- |
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61 | INTEGER, INTENT(in) :: kt ! ocean time step |
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62 | INTEGER :: ji, jj, jk |
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63 | REAL(wp) :: zcompadi, zcompadi2, zcompaz , zcompaph, zcompapoc |
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64 | REAL(wp) :: zgraze , zdenom , zdenom2, zstep |
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65 | REAL(wp) :: zfact , zinano , zidiat, zipoc |
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66 | REAL(wp) :: zgrarem, zgrafer, zgrapoc, zprcaca, zmortz |
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67 | REAL(wp) :: zrespz, ztortz |
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68 | REAL(wp) :: zgrazp, zgrazm, zgrazsd |
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69 | REAL(wp) :: zgrazmf, zgrazsf, zgrazpf |
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70 | CHARACTER (len=25) :: charout |
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71 | |
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72 | !!--------------------------------------------------------------------- |
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73 | |
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74 | grazing(:,:,:) = 0. !: grazing set to zero |
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75 | zstep = rfact2 / rday ! Time step duration for biology |
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76 | |
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77 | DO jk = 1, jpkm1 |
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78 | DO jj = 1, jpj |
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79 | DO ji = 1, jpi |
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80 | zcompaz = MAX( ( trn(ji,jj,jk,jpzoo) - 1.e-9 ), 0.e0 ) |
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81 | zstep = xstep |
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82 | # if defined key_degrad |
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83 | zstep = zstep * facvol(ji,jj,jk) |
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84 | # endif |
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85 | zfact = zstep * tgfunc(ji,jj,jk) * zcompaz |
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86 | |
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87 | ! Respiration rates of both zooplankton |
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88 | ! ------------------------------------- |
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89 | zrespz = resrat * zfact * ( 1.+ 3.* nitrfac(ji,jj,jk) ) & |
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90 | & * trn(ji,jj,jk,jpzoo) / ( xkmort + trn(ji,jj,jk,jpzoo) ) |
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91 | |
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92 | ! Zooplankton mortality. A square function has been selected with |
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93 | ! no real reason except that it seems to be more stable and may mimic predation. |
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94 | ! --------------------------------------------------------------- |
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95 | ztortz = mzrat * 1.e6 * zfact * trn(ji,jj,jk,jpzoo) |
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96 | |
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97 | zcompadi = MAX( ( trn(ji,jj,jk,jpdia) - 1.e-8 ), 0.e0 ) |
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98 | zcompadi2 = MIN( zcompadi, 5.e-7 ) |
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99 | zcompaph = MAX( ( trn(ji,jj,jk,jpphy) - 2.e-7 ), 0.e0 ) |
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100 | zcompapoc = MAX( ( trn(ji,jj,jk,jppoc) - 1.e-8 ), 0.e0 ) |
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101 | |
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102 | ! Microzooplankton grazing |
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103 | ! ------------------------ |
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104 | zdenom2 = 1./ ( xpref2p * zcompaph + xpref2c * zcompapoc + xpref2d * zcompadi2 + rtrn ) |
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105 | |
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106 | zgraze = grazrat * zstep * tgfunc(ji,jj,jk) * trn(ji,jj,jk,jpzoo) |
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107 | |
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108 | zinano = xpref2p * zcompaph * zdenom2 |
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109 | zipoc = xpref2c * zcompapoc * zdenom2 |
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110 | zidiat = xpref2d * zcompadi2 * zdenom2 |
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111 | |
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112 | zdenom = 1./ ( xkgraz + zinano * zcompaph + zipoc * zcompapoc + zidiat * zcompadi2 ) |
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113 | |
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114 | zgrazp = zgraze * zinano * zcompaph * zdenom |
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115 | zgrazm = zgraze * zipoc * zcompapoc * zdenom |
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116 | zgrazsd = zgraze * zidiat * zcompadi2 * zdenom |
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117 | |
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118 | zgrazpf = zgrazp * trn(ji,jj,jk,jpnfe) / (trn(ji,jj,jk,jpphy) + rtrn) |
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119 | zgrazmf = zgrazm * trn(ji,jj,jk,jpsfe) / (trn(ji,jj,jk,jppoc) + rtrn) |
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120 | zgrazsf = zgrazsd * trn(ji,jj,jk,jpdfe) / (trn(ji,jj,jk,jpdia) + rtrn) |
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121 | |
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122 | ! Grazing by microzooplankton |
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123 | grazing(ji,jj,jk) = grazing(ji,jj,jk) + zgrazp + zgrazm + zgrazsd |
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124 | |
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125 | ! Various remineralization and excretion terms |
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126 | ! -------------------------------------------- |
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127 | zgrarem = ( zgrazp + zgrazm + zgrazsd ) * ( 1.- epsher - unass ) |
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128 | zgrafer = ( zgrazpf + zgrazsf + zgrazmf ) * ( 1.- epsher - unass ) & |
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129 | & + epsher * ( zgrazm * MAX((trn(ji,jj,jk,jpsfe) / (trn(ji,jj,jk,jppoc)+ rtrn)-ferat3),0.e0) & |
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130 | & + zgrazp * MAX((trn(ji,jj,jk,jpnfe) / (trn(ji,jj,jk,jpphy)+ rtrn)-ferat3),0.e0) & |
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131 | & + zgrazsd * MAX((trn(ji,jj,jk,jpdfe) / (trn(ji,jj,jk,jpdia)+ rtrn)-ferat3),0.e0 ) ) |
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132 | |
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133 | zgrapoc = ( zgrazp + zgrazm + zgrazsd ) |
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134 | |
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135 | ! Update of the TRA arrays |
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136 | ! ------------------------ |
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137 | |
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138 | tra(ji,jj,jk,jppo4) = tra(ji,jj,jk,jppo4) + zgrarem * sigma1 |
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139 | tra(ji,jj,jk,jpnh4) = tra(ji,jj,jk,jpnh4) + zgrarem * sigma1 |
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140 | tra(ji,jj,jk,jpdoc) = tra(ji,jj,jk,jpdoc) + zgrarem * (1.-sigma1) |
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141 | tra(ji,jj,jk,jpoxy) = tra(ji,jj,jk,jpoxy) - o2ut * zgrarem * sigma1 |
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142 | tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) + zgrafer |
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143 | tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zgrapoc * unass |
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144 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zgrarem * sigma1 |
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145 | #if defined key_kriest |
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146 | tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) + zgrapoc * unass * xkr_ddiat |
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147 | #endif |
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148 | |
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149 | ! |
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150 | ! Update the arrays TRA which contain the biological sources and sinks |
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151 | ! -------------------------------------------------------------------- |
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152 | |
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153 | zmortz = ztortz + zrespz |
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154 | tra(ji,jj,jk,jpzoo) = tra(ji,jj,jk,jpzoo) - zmortz + epsher * zgrapoc |
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155 | tra(ji,jj,jk,jpphy) = tra(ji,jj,jk,jpphy) - zgrazp |
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156 | tra(ji,jj,jk,jpdia) = tra(ji,jj,jk,jpdia) - zgrazsd |
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157 | tra(ji,jj,jk,jpnch) = tra(ji,jj,jk,jpnch) - zgrazp * trn(ji,jj,jk,jpnch)/(trn(ji,jj,jk,jpphy)+rtrn) |
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158 | tra(ji,jj,jk,jpdch) = tra(ji,jj,jk,jpdch) - zgrazsd * trn(ji,jj,jk,jpdch)/(trn(ji,jj,jk,jpdia)+rtrn) |
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159 | tra(ji,jj,jk,jpbsi) = tra(ji,jj,jk,jpbsi) - zgrazsd * trn(ji,jj,jk,jpbsi)/(trn(ji,jj,jk,jpdia)+rtrn) |
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160 | tra(ji,jj,jk,jpdsi) = tra(ji,jj,jk,jpdsi) + zgrazsd * trn(ji,jj,jk,jpbsi)/(trn(ji,jj,jk,jpdia)+rtrn) |
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161 | tra(ji,jj,jk,jpnfe) = tra(ji,jj,jk,jpnfe) - zgrazpf |
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162 | tra(ji,jj,jk,jpdfe) = tra(ji,jj,jk,jpdfe) - zgrazsf |
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163 | tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zmortz - zgrazm |
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164 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + ferat3 * zmortz + unass * ( zgrazpf + zgrazsf ) - (1.-unass) * zgrazmf |
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165 | zprcaca = xfracal(ji,jj,jk) * unass * zgrazp |
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166 | ! |
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167 | prodcal(ji,jj,jk) = prodcal(ji,jj,jk) + zprcaca ! prodcal=prodcal(nanophy)+prodcal(microzoo)+prodcal(mesozoo) |
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168 | ! |
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169 | zprcaca = part * zprcaca |
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170 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) - zprcaca |
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171 | tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) - 2. * zprcaca |
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172 | tra(ji,jj,jk,jpcal) = tra(ji,jj,jk,jpcal) + zprcaca |
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173 | #if defined key_kriest |
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174 | tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) + ( zmortz - zgrazm ) * xkr_ddiat |
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175 | #endif |
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176 | END DO |
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177 | END DO |
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178 | END DO |
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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="('micro')") |
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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 | END SUBROUTINE p4z_micro |
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187 | |
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188 | |
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189 | SUBROUTINE p4z_micro_init |
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190 | |
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191 | !!---------------------------------------------------------------------- |
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192 | !! *** ROUTINE p4z_micro_init *** |
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193 | !! |
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194 | !! ** Purpose : Initialization of microzooplankton parameters |
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195 | !! |
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196 | !! ** Method : Read the nampiszoo namelist and check the parameters |
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197 | !! called at the first timestep (nit000) |
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198 | !! |
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199 | !! ** input : Namelist nampiszoo |
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200 | !! |
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201 | !!---------------------------------------------------------------------- |
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202 | |
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203 | NAMELIST/nampiszoo/ grazrat,resrat,mzrat,xpref2c, xpref2p, & |
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204 | & xpref2d, xkgraz, epsher, sigma1, unass |
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205 | |
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206 | REWIND( numnatp ) ! read numnatp |
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207 | READ ( numnatp, nampiszoo ) |
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208 | |
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209 | IF(lwp) THEN ! control print |
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210 | WRITE(numout,*) ' ' |
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211 | WRITE(numout,*) ' Namelist parameters for microzooplankton, nampiszoo' |
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212 | WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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213 | WRITE(numout,*) ' zoo preference for POC xpref2c =', xpref2c |
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214 | WRITE(numout,*) ' zoo preference for nano xpref2p =', xpref2p |
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215 | WRITE(numout,*) ' zoo preference for diatoms xpref2d =', xpref2d |
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216 | WRITE(numout,*) ' exsudation rate of microzooplankton resrat =', resrat |
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217 | WRITE(numout,*) ' microzooplankton mortality rate mzrat =', mzrat |
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218 | WRITE(numout,*) ' maximal microzoo grazing rate grazrat =', grazrat |
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219 | WRITE(numout,*) ' non assimilated fraction of P by microzoo unass =', unass |
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220 | WRITE(numout,*) ' Efficicency of microzoo growth epsher =', epsher |
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221 | WRITE(numout,*) ' Fraction of microzoo excretion as DOM sigma1 =', sigma1 |
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222 | WRITE(numout,*) ' half sturation constant for grazing 1 xkgraz =', xkgraz |
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223 | ENDIF |
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224 | |
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225 | END SUBROUTINE p4z_micro_init |
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226 | |
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227 | INTEGER FUNCTION p4z_micro_alloc() |
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228 | !!---------------------------------------------------------------------- |
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229 | !! *** ROUTINE p4z_micro_alloc *** |
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230 | !!---------------------------------------------------------------------- |
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231 | ALLOCATE( grazing(jpi,jpj,jpk), STAT=p4z_micro_alloc ) |
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232 | IF( p4z_micro_alloc /= 0 ) CALL ctl_warn('p4z_micro_alloc : failed to allocate arrays.') |
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233 | |
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234 | END FUNCTION p4z_micro_alloc |
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235 | |
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236 | #else |
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237 | !!====================================================================== |
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238 | !! Dummy module : No PISCES bio-model |
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239 | !!====================================================================== |
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240 | CONTAINS |
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241 | SUBROUTINE p4z_micro ! Empty routine |
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242 | END SUBROUTINE p4z_micro |
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243 | #endif |
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244 | |
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245 | !!====================================================================== |
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246 | END MODULE p4zmicro |
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