1 | MODULE p4zmeso |
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2 | !!====================================================================== |
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3 | !! *** MODULE p4zmeso *** |
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4 | !! TOP : PISCES Compute the sources/sinks for mesozooplankton |
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5 | !!====================================================================== |
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6 | !! History : 1.0 ! 2002 (O. Aumont) Original code |
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7 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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8 | !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Quota model for iron |
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9 | !!---------------------------------------------------------------------- |
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10 | !! p4z_meso : Compute the sources/sinks for mesozooplankton |
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11 | !! p4z_meso_init : Initialization of the parameters for mesozooplankton |
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12 | !!---------------------------------------------------------------------- |
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13 | USE oce_trc ! shared variables between ocean and passive tracers |
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14 | USE trc ! passive tracers common variables |
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15 | USE sms_pisces ! PISCES Source Minus Sink variables |
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16 | USE p4zprod ! production |
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17 | USE prtctl_trc ! print control for debugging |
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18 | USE iom ! I/O manager |
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19 | |
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20 | IMPLICIT NONE |
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21 | PRIVATE |
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22 | |
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23 | PUBLIC p4z_meso ! called in p4zbio.F90 |
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24 | PUBLIC p4z_meso_init ! called in trcsms_pisces.F90 |
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25 | |
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26 | !! * Shared module variables |
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27 | REAL(wp), PUBLIC :: part2 !: part of calcite not dissolved in mesozoo guts |
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28 | REAL(wp), PUBLIC :: xprefc !: mesozoo preference for POC |
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29 | REAL(wp), PUBLIC :: xprefp !: mesozoo preference for nanophyto |
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30 | REAL(wp), PUBLIC :: xprefz !: mesozoo preference for diatoms |
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31 | REAL(wp), PUBLIC :: xprefpoc !: mesozoo preference for POC |
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32 | REAL(wp), PUBLIC :: xthresh2zoo !: zoo feeding threshold for mesozooplankton |
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33 | REAL(wp), PUBLIC :: xthresh2dia !: diatoms feeding threshold for mesozooplankton |
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34 | REAL(wp), PUBLIC :: xthresh2phy !: nanophyto feeding threshold for mesozooplankton |
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35 | REAL(wp), PUBLIC :: xthresh2poc !: poc feeding threshold for mesozooplankton |
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36 | REAL(wp), PUBLIC :: xthresh2 !: feeding threshold for mesozooplankton |
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37 | REAL(wp), PUBLIC :: resrat2 !: exsudation rate of mesozooplankton |
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38 | REAL(wp), PUBLIC :: mzrat2 !: microzooplankton mortality rate |
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39 | REAL(wp), PUBLIC :: grazrat2 !: maximal mesozoo grazing rate |
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40 | REAL(wp), PUBLIC :: xkgraz2 !: non assimilated fraction of P by mesozoo |
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41 | REAL(wp), PUBLIC :: unass2 !: Efficicency of mesozoo growth |
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42 | REAL(wp), PUBLIC :: sigma2 !: Fraction of mesozoo excretion as DOM |
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43 | REAL(wp), PUBLIC :: epsher2 !: half sturation constant for grazing 2 |
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44 | REAL(wp), PUBLIC :: grazflux !: mesozoo flux feeding rate |
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45 | |
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46 | !!---------------------------------------------------------------------- |
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47 | !! NEMO/TOP 3.3 , NEMO Consortium (2010) |
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48 | !! $Id: p4zmeso.F90 3160 2011-11-20 14:27:18Z cetlod $ |
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49 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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50 | !!---------------------------------------------------------------------- |
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51 | |
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52 | CONTAINS |
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53 | |
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54 | SUBROUTINE p4z_meso( kt, knt ) |
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55 | !!--------------------------------------------------------------------- |
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56 | !! *** ROUTINE p4z_meso *** |
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57 | !! |
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58 | !! ** Purpose : Compute the sources/sinks for mesozooplankton |
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59 | !! |
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60 | !! ** Method : - ??? |
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61 | !!--------------------------------------------------------------------- |
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62 | INTEGER, INTENT(in) :: kt, knt ! ocean time step |
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63 | INTEGER :: ji, jj, jk |
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64 | REAL(wp) :: zcompadi, zcompaph, zcompapoc, zcompaz, zcompam |
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65 | REAL(wp) :: zgraze2 , zdenom, zdenom2 |
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66 | REAL(wp) :: zfact , zfood, zfoodlim, zproport |
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67 | REAL(wp) :: zmortzgoc, zfrac, zfracfe, zratio, zratio2, zfracal, zgrazcal |
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68 | REAL(wp) :: zepshert, zepsherv, zgrarsig, zgraztot, zgraztotn, zgraztotf |
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69 | REAL(wp) :: zgrarem2, zgrafer2, zgrapoc2, zprcaca, zmortz2, zgrasrat, zgrasratn |
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70 | REAL(wp) :: zrespz2, ztortz2, zgrazd, zgrazz, zgrazpof |
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71 | REAL(wp) :: zgrazn, zgrazpoc, zgraznf, zgrazf |
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72 | REAL(wp) :: zgrazfffp, zgrazfffg, zgrazffep, zgrazffeg |
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73 | CHARACTER (len=25) :: charout |
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74 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zgrazing, zw3d |
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75 | |
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76 | !!--------------------------------------------------------------------- |
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77 | ! |
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78 | IF( nn_timing == 1 ) CALL timing_start('p4z_meso') |
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79 | ! |
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80 | CALL wrk_alloc( jpi, jpj, jpk, zgrazing ) |
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81 | zgrazing(:,:,:) = 0._wp |
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82 | |
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83 | DO jk = 1, jpkm1 |
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84 | DO jj = 1, jpj |
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85 | DO ji = 1, jpi |
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86 | zcompam = MAX( ( trb(ji,jj,jk,jpmes) - 1.e-9 ), 0.e0 ) |
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87 | zfact = xstep * tgfunc2(ji,jj,jk) * zcompam |
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88 | |
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89 | ! Respiration rates of both zooplankton |
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90 | ! ------------------------------------- |
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91 | zrespz2 = resrat2 * zfact * trb(ji,jj,jk,jpmes) / ( xkmort + trb(ji,jj,jk,jpmes) ) & |
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92 | & + resrat2 * zfact * 3. * nitrfac(ji,jj,jk) |
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93 | |
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94 | ! Zooplankton mortality. A square function has been selected with |
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95 | ! no real reason except that it seems to be more stable and may mimic predation |
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96 | ! --------------------------------------------------------------- |
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97 | ztortz2 = mzrat2 * 1.e6 * zfact * trb(ji,jj,jk,jpmes) |
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98 | ! |
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99 | zcompadi = MAX( ( trb(ji,jj,jk,jpdia) - xthresh2dia ), 0.e0 ) |
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100 | zcompaz = MAX( ( trb(ji,jj,jk,jpzoo) - xthresh2zoo ), 0.e0 ) |
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101 | ! Size effect of nanophytoplankton on grazing : the smaller it is, the less prone |
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102 | ! it is to predation by mesozooplankton |
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103 | ! ------------------------------------------------------------------------------- |
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104 | zcompaph = MAX( ( trb(ji,jj,jk,jpphy) - xthresh2phy ), 0.e0 ) & |
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105 | & * MIN(1., MAX( 0., ( quotan(ji,jj,jk) - 0.2) / 0.3 ) ) |
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106 | zcompapoc = MAX( ( trb(ji,jj,jk,jppoc) - xthresh2poc ), 0.e0 ) |
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107 | |
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108 | zfood = xprefc * zcompadi + xprefz * zcompaz + xprefp * zcompaph + xprefpoc * zcompapoc |
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109 | zfoodlim = MAX( 0., zfood - MIN( 0.5 * zfood, xthresh2 ) ) |
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110 | zdenom = zfoodlim / ( xkgraz2 + zfoodlim ) |
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111 | zdenom2 = zdenom / ( zfood + rtrn ) |
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112 | zgraze2 = grazrat2 * xstep * tgfunc2(ji,jj,jk) * trb(ji,jj,jk,jpmes) |
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113 | |
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114 | zgrazd = zgraze2 * xprefc * zcompadi * zdenom2 |
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115 | zgrazz = zgraze2 * xprefz * zcompaz * zdenom2 |
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116 | zgrazn = zgraze2 * xprefp * zcompaph * zdenom2 |
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117 | zgrazpoc = zgraze2 * xprefpoc * zcompapoc * zdenom2 |
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118 | |
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119 | zgraznf = zgrazn * trb(ji,jj,jk,jpnfe) / ( trb(ji,jj,jk,jpphy) + rtrn) |
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120 | zgrazf = zgrazd * trb(ji,jj,jk,jpdfe) / ( trb(ji,jj,jk,jpdia) + rtrn) |
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121 | zgrazpof = zgrazpoc * trb(ji,jj,jk,jpsfe) / ( trb(ji,jj,jk,jppoc) + rtrn) |
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122 | |
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123 | ! Mesozooplankton flux feeding on GOC |
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124 | ! ---------------------------------- |
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125 | ! ---------------------------------- |
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126 | zgrazffeg = grazflux * xstep * wsbio4(ji,jj,jk) & |
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127 | & * tgfunc2(ji,jj,jk) * trb(ji,jj,jk,jpgoc) * trb(ji,jj,jk,jpmes) |
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128 | zgrazfffg = zgrazffeg * trb(ji,jj,jk,jpbfe) / (trb(ji,jj,jk,jpgoc) + rtrn) |
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129 | zgrazffep = grazflux * xstep * wsbio3(ji,jj,jk) & |
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130 | & * tgfunc2(ji,jj,jk) * trb(ji,jj,jk,jppoc) * trb(ji,jj,jk,jpmes) |
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131 | zgrazfffp = zgrazffep * trb(ji,jj,jk,jpsfe) / (trb(ji,jj,jk,jppoc) + rtrn) |
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132 | ! |
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133 | zgraztot = zgrazd + zgrazz + zgrazn + zgrazpoc + zgrazffep + zgrazffeg |
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134 | ! Compute the proportion of filter feeders |
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135 | zproport = (zgrazffep + zgrazffeg)/(rtrn + zgraztot) |
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136 | ! Compute fractionation of aggregates. It is assumed that |
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137 | ! diatoms based aggregates are more prone to fractionation |
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138 | ! since they are more porous (marine snow instead of fecal pellets) |
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139 | zratio = trb(ji,jj,jk,jpgsi) / ( trb(ji,jj,jk,jpgoc) + rtrn ) |
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140 | zratio2 = zratio * zratio |
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141 | zfrac = zproport * grazflux * xstep * wsbio4(ji,jj,jk) & |
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142 | & * trb(ji,jj,jk,jpgoc) * trb(ji,jj,jk,jpmes) & |
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143 | & * ( 0.2 + 3.8 * zratio2 / ( 1.**2 + zratio2 ) ) |
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144 | zfracfe = zfrac * trb(ji,jj,jk,jpbfe) / (trb(ji,jj,jk,jpgoc) + rtrn) |
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145 | |
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146 | zgrazffep = zproport * zgrazffep |
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147 | zgrazffeg = zproport * zgrazffeg |
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148 | zgrazfffp = zproport * zgrazfffp |
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149 | zgrazfffg = zproport * zgrazfffg |
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150 | zgraztot = zgrazd + zgrazz + zgrazn + zgrazpoc + zgrazffep + zgrazffeg |
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151 | zgraztotn = zgrazd * quotad(ji,jj,jk) + zgrazz + zgrazn * quotan(ji,jj,jk) & |
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152 | & + zgrazpoc + zgrazffep + zgrazffeg |
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153 | zgraztotf = zgrazf + zgraznf + zgrazz * ferat3 + zgrazpof + zgrazfffp + zgrazfffg |
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154 | |
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155 | ! Total grazing ( grazing by microzoo is already computed in p4zmicro ) |
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156 | zgrazing(ji,jj,jk) = zgraztot |
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157 | |
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158 | ! Mesozooplankton efficiency |
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159 | ! -------------------------- |
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160 | zgrasrat = ( zgraztotf +rtrn )/ ( zgraztot + rtrn ) |
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161 | zgrasratn = ( zgraztotn +rtrn )/ ( zgraztot + rtrn ) |
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162 | zepshert = MIN( 1., zgrasratn, zgrasrat / ferat3) |
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163 | zepsherv = zepshert * MIN( epsher2, (1. - unass2) * zgrasrat / ferat3, (1. - unass2) * zgrasratn ) |
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164 | zgrarem2 = zgraztot * ( 1. - zepsherv - unass2 ) & |
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165 | & + ( 1. - epsher2 - unass2 ) / ( 1. - epsher2 ) * ztortz2 |
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166 | zgrafer2 = zgraztot * MAX( 0. , ( 1. - unass2 ) * zgrasrat - ferat3 * zepsherv ) & |
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167 | & + ferat3 * ( ( 1. - epsher2 - unass2 ) /( 1. - epsher2 ) * ztortz2 ) |
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168 | zgrapoc2 = zgraztot * unass2 |
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169 | |
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170 | ! Update the arrays TRA which contain the biological sources and sinks |
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171 | zgrarsig = zgrarem2 * sigma2 |
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172 | tra(ji,jj,jk,jppo4) = tra(ji,jj,jk,jppo4) + zgrarsig |
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173 | tra(ji,jj,jk,jpnh4) = tra(ji,jj,jk,jpnh4) + zgrarsig |
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174 | tra(ji,jj,jk,jpdoc) = tra(ji,jj,jk,jpdoc) + zgrarem2 - zgrarsig |
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175 | ! |
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176 | IF( ln_ligand ) tra(ji,jj,jk,jplgw) = tra(ji,jj,jk,jplgw) + (zgrarem2 - zgrarsig) * ldocz |
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177 | ! |
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178 | tra(ji,jj,jk,jpoxy) = tra(ji,jj,jk,jpoxy) - o2ut * zgrarsig |
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179 | tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) + zgrafer2 |
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180 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zgrarsig |
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181 | tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) + rno3 * zgrarsig |
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182 | |
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183 | zmortz2 = ztortz2 + zrespz2 |
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184 | zmortzgoc = unass2 / ( 1. - epsher2 ) * ztortz2 + zrespz2 |
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185 | tra(ji,jj,jk,jpmes) = tra(ji,jj,jk,jpmes) - zmortz2 + zepsherv * zgraztot |
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186 | tra(ji,jj,jk,jpdia) = tra(ji,jj,jk,jpdia) - zgrazd |
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187 | tra(ji,jj,jk,jpzoo) = tra(ji,jj,jk,jpzoo) - zgrazz |
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188 | tra(ji,jj,jk,jpphy) = tra(ji,jj,jk,jpphy) - zgrazn |
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189 | tra(ji,jj,jk,jpnch) = tra(ji,jj,jk,jpnch) - zgrazn * trb(ji,jj,jk,jpnch) / ( trb(ji,jj,jk,jpphy) + rtrn ) |
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190 | tra(ji,jj,jk,jpdch) = tra(ji,jj,jk,jpdch) - zgrazd * trb(ji,jj,jk,jpdch) / ( trb(ji,jj,jk,jpdia) + rtrn ) |
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191 | tra(ji,jj,jk,jpdsi) = tra(ji,jj,jk,jpdsi) - zgrazd * trb(ji,jj,jk,jpdsi) / ( trb(ji,jj,jk,jpdia) + rtrn ) |
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192 | tra(ji,jj,jk,jpgsi) = tra(ji,jj,jk,jpgsi) + zgrazd * trb(ji,jj,jk,jpdsi) / ( trb(ji,jj,jk,jpdia) + rtrn ) |
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193 | tra(ji,jj,jk,jpnfe) = tra(ji,jj,jk,jpnfe) - zgraznf |
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194 | tra(ji,jj,jk,jpdfe) = tra(ji,jj,jk,jpdfe) - zgrazf |
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195 | |
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196 | tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) - zgrazpoc - zgrazffep + zfrac |
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197 | prodpoc(ji,jj,jk) = prodpoc(ji,jj,jk) + zfrac |
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198 | conspoc(ji,jj,jk) = conspoc(ji,jj,jk) - zgrazpoc - zgrazffep |
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199 | tra(ji,jj,jk,jpgoc) = tra(ji,jj,jk,jpgoc) + zmortzgoc - zgrazffeg + zgrapoc2 - zfrac |
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200 | prodgoc(ji,jj,jk) = prodgoc(ji,jj,jk) + zmortzgoc + zgrapoc2 |
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201 | consgoc(ji,jj,jk) = consgoc(ji,jj,jk) - zgrazffeg - zfrac |
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202 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) - zgrazpof - zgrazfffp + zfracfe |
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203 | tra(ji,jj,jk,jpbfe) = tra(ji,jj,jk,jpbfe) + ferat3 * zmortzgoc - zgrazfffg & |
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204 | & + zgraztotf * unass2 - zfracfe |
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205 | zfracal = trb(ji,jj,jk,jpcal) / (trb(ji,jj,jk,jppoc) + trb(ji,jj,jk,jpgoc) + rtrn ) |
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206 | zgrazcal = (zgrazffeg + zgrazpoc) * (1. - part2) * zfracal |
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207 | ! calcite production |
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208 | zprcaca = xfracal(ji,jj,jk) * zgrazn |
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209 | prodcal(ji,jj,jk) = prodcal(ji,jj,jk) + zprcaca ! prodcal=prodcal(nanophy)+prodcal(microzoo)+prodcal(mesozoo) |
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210 | ! |
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211 | zprcaca = part2 * zprcaca |
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212 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zgrazcal - zprcaca |
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213 | tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) - 2. * ( zgrazcal + zprcaca ) |
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214 | tra(ji,jj,jk,jpcal) = tra(ji,jj,jk,jpcal) - zgrazcal + zprcaca |
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215 | END DO |
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216 | END DO |
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217 | END DO |
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218 | ! |
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219 | IF( lk_iomput .AND. knt == nrdttrc ) THEN |
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220 | CALL wrk_alloc( jpi, jpj, jpk, zw3d ) |
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221 | IF( iom_use( "GRAZ2" ) ) THEN |
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222 | zw3d(:,:,:) = zgrazing(:,:,:) * 1.e+3 * rfact2r * tmask(:,:,:) ! Total grazing of phyto by zooplankton |
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223 | CALL iom_put( "GRAZ2", zw3d ) |
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224 | ENDIF |
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225 | IF( iom_use( "PCAL" ) ) THEN |
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226 | zw3d(:,:,:) = prodcal(:,:,:) * 1.e+3 * rfact2r * tmask(:,:,:) ! Calcite production |
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227 | CALL iom_put( "PCAL", zw3d ) |
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228 | ENDIF |
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229 | CALL wrk_dealloc( jpi, jpj, jpk, zw3d ) |
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230 | ENDIF |
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231 | ! |
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232 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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233 | WRITE(charout, FMT="('meso')") |
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234 | CALL prt_ctl_trc_info(charout) |
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235 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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236 | ENDIF |
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237 | ! |
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238 | CALL wrk_dealloc( jpi, jpj, jpk, zgrazing ) |
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239 | ! |
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240 | IF( nn_timing == 1 ) CALL timing_stop('p4z_meso') |
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241 | ! |
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242 | END SUBROUTINE p4z_meso |
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243 | |
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244 | SUBROUTINE p4z_meso_init |
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245 | |
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246 | !!---------------------------------------------------------------------- |
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247 | !! *** ROUTINE p4z_meso_init *** |
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248 | !! |
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249 | !! ** Purpose : Initialization of mesozooplankton parameters |
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250 | !! |
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251 | !! ** Method : Read the nampismes namelist and check the parameters |
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252 | !! called at the first timestep (nittrc000) |
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253 | !! |
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254 | !! ** input : Namelist nampismes |
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255 | !! |
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256 | !!---------------------------------------------------------------------- |
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257 | |
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258 | NAMELIST/namp4zmes/ part2, grazrat2, resrat2, mzrat2, xprefc, xprefp, xprefz, & |
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259 | & xprefpoc, xthresh2dia, xthresh2phy, xthresh2zoo, xthresh2poc, & |
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260 | & xthresh2, xkgraz2, epsher2, sigma2, unass2, grazflux |
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261 | INTEGER :: ios ! Local integer output status for namelist read |
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262 | |
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263 | REWIND( numnatp_ref ) ! Namelist nampismes in reference namelist : Pisces mesozooplankton |
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264 | READ ( numnatp_ref, namp4zmes, IOSTAT = ios, ERR = 901) |
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265 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namp4zmes in reference namelist', lwp ) |
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266 | |
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267 | REWIND( numnatp_cfg ) ! Namelist nampismes in configuration namelist : Pisces mesozooplankton |
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268 | READ ( numnatp_cfg, namp4zmes, IOSTAT = ios, ERR = 902 ) |
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269 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namp4zmes in configuration namelist', lwp ) |
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270 | IF(lwm) WRITE ( numonp, namp4zmes ) |
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271 | |
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272 | |
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273 | IF(lwp) THEN ! control print |
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274 | WRITE(numout,*) ' ' |
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275 | WRITE(numout,*) ' Namelist parameters for mesozooplankton, namp4zmes' |
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276 | WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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277 | WRITE(numout,*) ' part of calcite not dissolved in mesozoo guts part2 =', part2 |
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278 | WRITE(numout,*) ' mesozoo preference for phyto xprefc =', xprefc |
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279 | WRITE(numout,*) ' mesozoo preference for POC xprefp =', xprefp |
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280 | WRITE(numout,*) ' mesozoo preference for zoo xprefz =', xprefz |
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281 | WRITE(numout,*) ' mesozoo preference for poc xprefpoc =', xprefpoc |
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282 | WRITE(numout,*) ' microzoo feeding threshold for mesozoo xthresh2zoo =', xthresh2zoo |
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283 | WRITE(numout,*) ' diatoms feeding threshold for mesozoo xthresh2dia =', xthresh2dia |
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284 | WRITE(numout,*) ' nanophyto feeding threshold for mesozoo xthresh2phy =', xthresh2phy |
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285 | WRITE(numout,*) ' poc feeding threshold for mesozoo xthresh2poc =', xthresh2poc |
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286 | WRITE(numout,*) ' feeding threshold for mesozooplankton xthresh2 =', xthresh2 |
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287 | WRITE(numout,*) ' exsudation rate of mesozooplankton resrat2 =', resrat2 |
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288 | WRITE(numout,*) ' mesozooplankton mortality rate mzrat2 =', mzrat2 |
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289 | WRITE(numout,*) ' maximal mesozoo grazing rate grazrat2 =', grazrat2 |
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290 | WRITE(numout,*) ' mesozoo flux feeding rate grazflux =', grazflux |
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291 | WRITE(numout,*) ' non assimilated fraction of P by mesozoo unass2 =', unass2 |
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292 | WRITE(numout,*) ' Efficicency of Mesozoo growth epsher2 =', epsher2 |
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293 | WRITE(numout,*) ' Fraction of mesozoo excretion as DOM sigma2 =', sigma2 |
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294 | WRITE(numout,*) ' half sturation constant for grazing 2 xkgraz2 =', xkgraz2 |
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295 | ENDIF |
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296 | |
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297 | |
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298 | END SUBROUTINE p4z_meso_init |
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299 | |
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300 | !!====================================================================== |
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301 | END MODULE p4zmeso |
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