[3443] | 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 | !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Quota model for iron |
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| 9 | !!---------------------------------------------------------------------- |
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[9169] | 10 | !! p4z_micro : Compute the sources/sinks for microzooplankton |
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| 11 | !! p4z_micro_init : Initialize and read the appropriate namelist |
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[3443] | 12 | !!---------------------------------------------------------------------- |
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[9169] | 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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[10227] | 16 | USE p4zlim ! Co-limitations |
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[9169] | 17 | USE p4zprod ! production |
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| 18 | USE iom ! I/O manager |
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| 19 | USE prtctl_trc ! print control for debugging |
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[3443] | 20 | |
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| 21 | IMPLICIT NONE |
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| 22 | PRIVATE |
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| 23 | |
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[12537] | 24 | !! * Shared module variables |
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[3443] | 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 | |
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[9169] | 28 | REAL(wp), PUBLIC :: part !: part of calcite not dissolved in microzoo guts |
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[10362] | 29 | REAL(wp), PUBLIC :: xprefc !: microzoo preference for POC |
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| 30 | REAL(wp), PUBLIC :: xprefn !: microzoo preference for nanophyto |
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| 31 | REAL(wp), PUBLIC :: xprefd !: microzoo preference for diatoms |
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[9169] | 32 | REAL(wp), PUBLIC :: xthreshdia !: diatoms feeding threshold for microzooplankton |
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| 33 | REAL(wp), PUBLIC :: xthreshphy !: nanophyto threshold for microzooplankton |
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| 34 | REAL(wp), PUBLIC :: xthreshpoc !: poc threshold for microzooplankton |
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| 35 | REAL(wp), PUBLIC :: xthresh !: feeding threshold for microzooplankton |
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| 36 | REAL(wp), PUBLIC :: resrat !: exsudation rate of microzooplankton |
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| 37 | REAL(wp), PUBLIC :: mzrat !: microzooplankton mortality rate |
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| 38 | REAL(wp), PUBLIC :: grazrat !: maximal microzoo grazing rate |
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[10362] | 39 | REAL(wp), PUBLIC :: xkgraz !: Half-saturation constant of assimilation |
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| 40 | REAL(wp), PUBLIC :: unass !: Non-assimilated part of food |
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[9169] | 41 | REAL(wp), PUBLIC :: sigma1 !: Fraction of microzoo excretion as DOM |
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[10362] | 42 | REAL(wp), PUBLIC :: epsher !: growth efficiency for grazing 1 |
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| 43 | REAL(wp), PUBLIC :: epshermin !: minimum growth efficiency for grazing 1 |
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[3443] | 44 | |
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| 45 | !!---------------------------------------------------------------------- |
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[10067] | 46 | !! NEMO/TOP 4.0 , NEMO Consortium (2018) |
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[10069] | 47 | !! $Id$ |
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[10068] | 48 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[3443] | 49 | !!---------------------------------------------------------------------- |
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| 50 | CONTAINS |
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| 51 | |
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[5385] | 52 | SUBROUTINE p4z_micro( kt, knt ) |
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[3443] | 53 | !!--------------------------------------------------------------------- |
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| 54 | !! *** ROUTINE p4z_micro *** |
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| 55 | !! |
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| 56 | !! ** Purpose : Compute the sources/sinks for microzooplankton |
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[12537] | 57 | !! This includes ingestion and assimilation, flux feeding |
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| 58 | !! and mortality. We use a passive prey switching |
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| 59 | !! parameterization. |
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| 60 | !! All living compartments smaller than microzooplankton |
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| 61 | !! are potential preys of mesozooplankton |
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[3443] | 62 | !! |
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| 63 | !! ** Method : - ??? |
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| 64 | !!--------------------------------------------------------------------- |
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[9169] | 65 | INTEGER, INTENT(in) :: kt ! ocean time step |
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| 66 | INTEGER, INTENT(in) :: knt ! ??? |
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[3446] | 67 | ! |
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[3443] | 68 | INTEGER :: ji, jj, jk |
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| 69 | REAL(wp) :: zcompadi, zcompaz , zcompaph, zcompapoc |
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[12759] | 70 | REAL(wp) :: zgraze , zdenom, zdenom2, zfact, zfood, zfoodlim, zbeta |
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[12349] | 71 | REAL(wp) :: zepsherf, zepshert, zepsherq, zepsherv, zgrarsig, zgraztotc, zgraztotn, zgraztotf |
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[3443] | 72 | REAL(wp) :: zgrarem, zgrafer, zgrapoc, zprcaca, zmortz |
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[12759] | 73 | REAL(wp) :: zrespz, ztortz, zgrasratf, zgrasratn |
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| 74 | REAL(wp) :: zgraznc, zgrazpoc, zgrazdc, zgrazpof, zgrazdf, zgraznf |
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| 75 | REAL(wp) :: zsigma, zdiffdn, ztmp1, ztmp2, ztmp3, ztmptot, zproport |
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[10362] | 76 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zgrazing, zfezoo |
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| 77 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: zw3d, zzligprod |
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[3443] | 78 | CHARACTER (len=25) :: charout |
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| 79 | !!--------------------------------------------------------------------- |
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| 80 | ! |
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[9124] | 81 | IF( ln_timing ) CALL timing_start('p4z_micro') |
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[3443] | 82 | ! |
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[10362] | 83 | IF (ln_ligand) THEN |
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| 84 | ALLOCATE( zzligprod(jpi,jpj,jpk) ) |
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| 85 | zzligprod(:,:,:) = 0._wp |
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| 86 | ENDIF |
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| 87 | ! |
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[3443] | 88 | DO jk = 1, jpkm1 |
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| 89 | DO jj = 1, jpj |
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| 90 | DO ji = 1, jpi |
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[5385] | 91 | zcompaz = MAX( ( trb(ji,jj,jk,jpzoo) - 1.e-9 ), 0.e0 ) |
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[7646] | 92 | zfact = xstep * tgfunc2(ji,jj,jk) * zcompaz |
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[3443] | 93 | |
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[12759] | 94 | ! Proportion of nano and diatoms that are within the size range |
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| 95 | ! accessible to microzooplankton. |
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| 96 | zproport = min(1.0, exp(-1.1 * MAX(0., ( sized(ji,jj,jk) - 1.8 ))**0.8 )) |
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| 97 | |
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[12537] | 98 | ! linear mortality of mesozooplankton |
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| 99 | ! A michaelis menten modulation term is used to avoid extinction of |
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| 100 | ! microzooplankton at very low food concentrations. Mortality is |
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| 101 | ! enhanced in low O2 waters |
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| 102 | ! ----------------------------------------------------------------- |
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[5385] | 103 | zrespz = resrat * zfact * trb(ji,jj,jk,jpzoo) / ( xkmort + trb(ji,jj,jk,jpzoo) ) & |
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[3443] | 104 | & + resrat * zfact * 3. * nitrfac(ji,jj,jk) |
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| 105 | |
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[12537] | 106 | ! Zooplankton quadratic mortality. A square function has been selected with |
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| 107 | ! to mimic predation and disease (density dependent mortality). It also tends |
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| 108 | ! to stabilise the model |
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| 109 | ! ------------------------------------------------------------------------- |
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[8533] | 110 | ztortz = mzrat * 1.e6 * zfact * trb(ji,jj,jk,jpzoo) * (1. - nitrfac(ji,jj,jk)) |
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[3443] | 111 | |
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[12537] | 112 | ! Computation of the abundance of the preys |
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| 113 | ! A threshold can be specified in the namelist |
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| 114 | ! Diatoms have a specific treatment. WHen concentrations |
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| 115 | ! exceed a certain value, diatoms are suppposed to be too |
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| 116 | ! big for microzooplankton. |
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| 117 | ! -------------------------------------------------------- |
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[12759] | 118 | zcompadi = zproport * MAX( ( trb(ji,jj,jk,jpdia) - xthreshdia ), 0.e0 ) |
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[5385] | 119 | zcompaph = MAX( ( trb(ji,jj,jk,jpphy) - xthreshphy ), 0.e0 ) |
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| 120 | zcompapoc = MAX( ( trb(ji,jj,jk,jppoc) - xthreshpoc ), 0.e0 ) |
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[3443] | 121 | |
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[12537] | 122 | ! Microzooplankton grazing |
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| 123 | ! The total amount of food is the sum of all preys accessible to mesozooplankton |
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| 124 | ! multiplied by their food preference |
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| 125 | ! A threshold can be specified in the namelist (xthresh). However, when food |
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| 126 | ! concentration is close to this threshold, it is decreased to avoid the |
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| 127 | ! accumulation of food in the mesozoopelagic domain |
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| 128 | ! ------------------------------------------------------------------------------- |
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[10362] | 129 | zfood = xprefn * zcompaph + xprefc * zcompapoc + xprefd * zcompadi |
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[3443] | 130 | zfoodlim = MAX( 0. , zfood - min(xthresh,0.5*zfood) ) |
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| 131 | zdenom = zfoodlim / ( xkgraz + zfoodlim ) |
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| 132 | zdenom2 = zdenom / ( zfood + rtrn ) |
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[8533] | 133 | zgraze = grazrat * xstep * tgfunc2(ji,jj,jk) * trb(ji,jj,jk,jpzoo) * (1. - nitrfac(ji,jj,jk)) |
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[3443] | 134 | |
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[12759] | 135 | ! An active switching parameterization is used here. |
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| 136 | ! We don't use the KTW parameterization proposed by |
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| 137 | ! Vallina et al. because it tends to produce too steady biomass |
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| 138 | ! composition and the variance of Chl is too low as it grazes |
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| 139 | ! too strongly on winning organisms. We use a generalized |
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| 140 | ! switching parameterization proposed by Morozov and |
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| 141 | ! Petrovskii (2013) |
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| 142 | ! ------------------------------------------------------------ |
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| 143 | ! The width of the selection window is increased when preys |
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| 144 | ! have low abundance, .i.e. zooplankton become less specific |
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| 145 | ! to avoid starvation. |
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| 146 | ! ---------------------------------------------------------- |
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| 147 | zsigma = 1.0 - zdenom**2/(0.05**2+zdenom**2) |
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| 148 | zsigma = 0.5 + 1.0*zsigma |
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| 149 | zdiffdn = exp( -ABS(log(1.67 * sizen(ji,jj,jk) / (5.0 * sized(ji,jj,jk) + rtrn )) )**2 / zsigma**2) |
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| 150 | ztmp1 = xprefn * zcompaph * ( zcompaph + zdiffdn * zcompadi ) / ( 1.0 + zdiffdn ) |
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| 151 | ztmp2 = xprefd * zcompadi * ( zdiffdn * zcompaph + zcompadi ) / ( 1.0 + zdiffdn ) |
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| 152 | ztmp3 = xprefc * zcompapoc**2 |
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| 153 | ztmptot = ztmp1 + ztmp2 + ztmp3 + rtrn |
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| 154 | ztmp1 = ztmp1 / ztmptot |
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| 155 | ztmp2 = ztmp2 / ztmptot |
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| 156 | ztmp3 = ztmp3 / ztmptot |
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[3443] | 157 | |
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[12759] | 158 | zgraznc = zgraze * ztmp1 * zdenom |
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| 159 | zgrazdc = zgraze * ztmp2 * zdenom |
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| 160 | zgrazpoc = zgraze * ztmp3 * zdenom |
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| 161 | |
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| 162 | zgraznf = zgraznc * trb(ji,jj,jk,jpnfe) / (trb(ji,jj,jk,jpphy) + rtrn) |
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| 163 | zgrazpof = zgrazpoc * trb(ji,jj,jk,jpsfe) / (trb(ji,jj,jk,jppoc) + rtrn) |
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| 164 | zgrazdf = zgrazdc * trb(ji,jj,jk,jpdfe) / (trb(ji,jj,jk,jpdia) + rtrn) |
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[3443] | 165 | ! |
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[12759] | 166 | zgraztotc = zgraznc + zgrazpoc + zgrazdc |
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| 167 | zgraztotf = zgraznf + zgrazdf + zgrazpof |
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| 168 | zgraztotn = zgraznc * quotan(ji,jj,jk) + zgrazpoc + zgrazdc * quotad(ji,jj,jk) |
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[3443] | 169 | |
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| 170 | ! Grazing by microzooplankton |
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[10362] | 171 | zgrazing(ji,jj,jk) = zgraztotc |
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[3443] | 172 | |
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[12537] | 173 | ! Microzooplankton efficiency. |
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| 174 | ! We adopt a formulation proposed by Mitra et al. (2007) |
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| 175 | ! The gross growth efficiency is controled by the most limiting nutrient. |
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| 176 | ! Growth is also further decreased when the food quality is poor. This is currently |
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| 177 | ! hard coded : it can be decreased by up to 50% (zepsherq) |
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| 178 | ! GGE can also be decreased when food quantity is high, zepsherf (Montagnes and |
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| 179 | ! Fulton, 2012) |
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| 180 | ! ----------------------------------------------------------------------------- |
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[12759] | 181 | zgrasratf = ( zgraztotf + rtrn ) / ( zgraztotc + rtrn ) |
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[10362] | 182 | zgrasratn = ( zgraztotn + rtrn ) / ( zgraztotc + rtrn ) |
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[12759] | 183 | zepshert = MIN( 1., zgrasratn, zgrasratf / ferat3) |
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[10362] | 184 | zbeta = MAX(0., (epsher - epshermin) ) |
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| 185 | zepsherf = epshermin + zbeta / ( 1.0 + 0.04E6 * 12. * zfood * zbeta ) |
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[12349] | 186 | zepsherq = 0.5 + (1.0 - 0.5) * zepshert * ( 1.0 + 1.0 ) / ( zepshert + 1.0 ) |
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| 187 | zepsherv = zepsherf * zepshert * zepsherq |
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[12759] | 188 | zgrafer = zgraztotc * MAX( 0. , ( 1. - unass ) * zgrasratf - ferat3 * zepsherv ) |
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[10362] | 189 | zgrarem = zgraztotc * ( 1. - zepsherv - unass ) |
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| 190 | zgrapoc = zgraztotc * unass |
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| 191 | |
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[3443] | 192 | ! Update of the TRA arrays |
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| 193 | ! ------------------------ |
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| 194 | zgrarsig = zgrarem * sigma1 |
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| 195 | tra(ji,jj,jk,jppo4) = tra(ji,jj,jk,jppo4) + zgrarsig |
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| 196 | tra(ji,jj,jk,jpnh4) = tra(ji,jj,jk,jpnh4) + zgrarsig |
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| 197 | tra(ji,jj,jk,jpdoc) = tra(ji,jj,jk,jpdoc) + zgrarem - zgrarsig |
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[7646] | 198 | ! |
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[10362] | 199 | IF( ln_ligand ) THEN |
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| 200 | tra(ji,jj,jk,jplgw) = tra(ji,jj,jk,jplgw) + (zgrarem - zgrarsig) * ldocz |
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| 201 | zzligprod(ji,jj,jk) = (zgrarem - zgrarsig) * ldocz |
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| 202 | ENDIF |
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[7646] | 203 | ! |
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[3443] | 204 | tra(ji,jj,jk,jpoxy) = tra(ji,jj,jk,jpoxy) - o2ut * zgrarsig |
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| 205 | tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) + zgrafer |
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[10362] | 206 | zfezoo(ji,jj,jk) = zgrafer |
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[3443] | 207 | tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zgrapoc |
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[10362] | 208 | prodpoc(ji,jj,jk) = prodpoc(ji,jj,jk) + zgrapoc |
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[3443] | 209 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + zgraztotf * unass |
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| 210 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zgrarsig |
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| 211 | tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) + rno3 * zgrarsig |
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| 212 | zmortz = ztortz + zrespz |
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[10362] | 213 | tra(ji,jj,jk,jpzoo) = tra(ji,jj,jk,jpzoo) - zmortz + zepsherv * zgraztotc |
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[12759] | 214 | tra(ji,jj,jk,jpphy) = tra(ji,jj,jk,jpphy) - zgraznc |
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| 215 | tra(ji,jj,jk,jpdia) = tra(ji,jj,jk,jpdia) - zgrazdc |
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| 216 | tra(ji,jj,jk,jpnch) = tra(ji,jj,jk,jpnch) - zgraznc * trb(ji,jj,jk,jpnch)/(trb(ji,jj,jk,jpphy)+rtrn) |
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| 217 | tra(ji,jj,jk,jpdch) = tra(ji,jj,jk,jpdch) - zgrazdc * trb(ji,jj,jk,jpdch)/(trb(ji,jj,jk,jpdia)+rtrn) |
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| 218 | tra(ji,jj,jk,jpdsi) = tra(ji,jj,jk,jpdsi) - zgrazdc * trb(ji,jj,jk,jpdsi)/(trb(ji,jj,jk,jpdia)+rtrn) |
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| 219 | tra(ji,jj,jk,jpgsi) = tra(ji,jj,jk,jpgsi) + zgrazdc * trb(ji,jj,jk,jpdsi)/(trb(ji,jj,jk,jpdia)+rtrn) |
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| 220 | tra(ji,jj,jk,jpnfe) = tra(ji,jj,jk,jpnfe) - zgraznf |
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| 221 | tra(ji,jj,jk,jpdfe) = tra(ji,jj,jk,jpdfe) - zgrazdf |
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| 222 | tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zmortz - zgrazpoc |
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[7646] | 223 | prodpoc(ji,jj,jk) = prodpoc(ji,jj,jk) + zmortz |
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[12759] | 224 | conspoc(ji,jj,jk) = conspoc(ji,jj,jk) - zgrazpoc |
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| 225 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + ferat3 * zmortz - zgrazpof |
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[3443] | 226 | ! |
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[12537] | 227 | ! Calcite remineralization due to zooplankton activity |
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| 228 | ! part of the ingested calcite is dissolving in the acidic gut |
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[12759] | 229 | zprcaca = xfracal(ji,jj,jk) * zgraznc |
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[3443] | 230 | prodcal(ji,jj,jk) = prodcal(ji,jj,jk) + zprcaca ! prodcal=prodcal(nanophy)+prodcal(microzoo)+prodcal(mesozoo) |
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| 231 | ! |
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| 232 | zprcaca = part * zprcaca |
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| 233 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) - zprcaca |
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| 234 | tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) - 2. * zprcaca |
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| 235 | tra(ji,jj,jk,jpcal) = tra(ji,jj,jk,jpcal) + zprcaca |
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| 236 | END DO |
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| 237 | END DO |
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| 238 | END DO |
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| 239 | ! |
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[7646] | 240 | IF( lk_iomput ) THEN |
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| 241 | IF( knt == nrdttrc ) THEN |
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[9125] | 242 | ALLOCATE( zw3d(jpi,jpj,jpk) ) |
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[7646] | 243 | IF( iom_use( "GRAZ1" ) ) THEN |
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[7753] | 244 | zw3d(:,:,:) = zgrazing(:,:,:) * 1.e+3 * rfact2r * tmask(:,:,:) ! Total grazing of phyto by zooplankton |
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[7646] | 245 | CALL iom_put( "GRAZ1", zw3d ) |
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| 246 | ENDIF |
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[10362] | 247 | IF( iom_use( "FEZOO" ) ) THEN |
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| 248 | zw3d(:,:,:) = zfezoo(:,:,:) * 1e9 * 1.e+3 * rfact2r * tmask(:,:,:) ! |
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| 249 | CALL iom_put( "FEZOO", zw3d ) |
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| 250 | ENDIF |
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| 251 | IF( iom_use( "LPRODZ" ) .AND. ln_ligand ) THEN |
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| 252 | zw3d(:,:,:) = zzligprod(:,:,:) * 1e9 * 1.e+3 * rfact2r * tmask(:,:,:) |
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| 253 | CALL iom_put( "LPRODZ" , zw3d ) |
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| 254 | ENDIF |
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[9125] | 255 | DEALLOCATE( zw3d ) |
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[4996] | 256 | ENDIF |
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[3446] | 257 | ENDIF |
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| 258 | ! |
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[10374] | 259 | IF (ln_ligand) DEALLOCATE( zzligprod ) |
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[10367] | 260 | ! |
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[9169] | 261 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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[3443] | 262 | WRITE(charout, FMT="('micro')") |
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| 263 | CALL prt_ctl_trc_info(charout) |
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| 264 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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| 265 | ENDIF |
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| 266 | ! |
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[9124] | 267 | IF( ln_timing ) CALL timing_stop('p4z_micro') |
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[3443] | 268 | ! |
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| 269 | END SUBROUTINE p4z_micro |
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| 270 | |
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| 271 | |
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| 272 | SUBROUTINE p4z_micro_init |
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| 273 | !!---------------------------------------------------------------------- |
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| 274 | !! *** ROUTINE p4z_micro_init *** |
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| 275 | !! |
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| 276 | !! ** Purpose : Initialization of microzooplankton parameters |
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| 277 | !! |
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[12537] | 278 | !! ** Method : Read the namp4zzoo namelist and check the parameters |
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[3443] | 279 | !! called at the first timestep (nittrc000) |
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| 280 | !! |
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[12537] | 281 | !! ** input : Namelist namp4zzoo |
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[3443] | 282 | !! |
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| 283 | !!---------------------------------------------------------------------- |
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[9124] | 284 | INTEGER :: ios ! Local integer |
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| 285 | ! |
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[10362] | 286 | NAMELIST/namp4zzoo/ part, grazrat, resrat, mzrat, xprefn, xprefc, & |
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| 287 | & xprefd, xthreshdia, xthreshphy, xthreshpoc, & |
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| 288 | & xthresh, xkgraz, epsher, epshermin, sigma1, unass |
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[9124] | 289 | !!---------------------------------------------------------------------- |
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| 290 | ! |
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[9169] | 291 | IF(lwp) THEN |
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| 292 | WRITE(numout,*) |
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| 293 | WRITE(numout,*) 'p4z_micro_init : Initialization of microzooplankton parameters' |
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| 294 | WRITE(numout,*) '~~~~~~~~~~~~~~' |
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| 295 | ENDIF |
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| 296 | ! |
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[12537] | 297 | REWIND( numnatp_ref ) ! Namelist namp4zzoo in reference namelist : Pisces microzooplankton |
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[7646] | 298 | READ ( numnatp_ref, namp4zzoo, IOSTAT = ios, ERR = 901) |
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[11536] | 299 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namp4zzoo in reference namelist' ) |
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[12537] | 300 | REWIND( numnatp_cfg ) ! Namelist namp4zzoo in configuration namelist : Pisces microzooplankton |
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[7646] | 301 | READ ( numnatp_cfg, namp4zzoo, IOSTAT = ios, ERR = 902 ) |
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[11536] | 302 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namp4zzoo in configuration namelist' ) |
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[9169] | 303 | IF(lwm) WRITE( numonp, namp4zzoo ) |
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[9124] | 304 | ! |
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[3443] | 305 | IF(lwp) THEN ! control print |
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[9169] | 306 | WRITE(numout,*) ' Namelist : namp4zzoo' |
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| 307 | WRITE(numout,*) ' part of calcite not dissolved in microzoo guts part =', part |
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[10362] | 308 | WRITE(numout,*) ' microzoo preference for POC xprefc =', xprefc |
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| 309 | WRITE(numout,*) ' microzoo preference for nano xprefn =', xprefn |
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| 310 | WRITE(numout,*) ' microzoo preference for diatoms xprefd =', xprefd |
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[9169] | 311 | WRITE(numout,*) ' diatoms feeding threshold for microzoo xthreshdia =', xthreshdia |
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| 312 | WRITE(numout,*) ' nanophyto feeding threshold for microzoo xthreshphy =', xthreshphy |
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| 313 | WRITE(numout,*) ' poc feeding threshold for microzoo xthreshpoc =', xthreshpoc |
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| 314 | WRITE(numout,*) ' feeding threshold for microzooplankton xthresh =', xthresh |
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| 315 | WRITE(numout,*) ' exsudation rate of microzooplankton resrat =', resrat |
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| 316 | WRITE(numout,*) ' microzooplankton mortality rate mzrat =', mzrat |
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| 317 | WRITE(numout,*) ' maximal microzoo grazing rate grazrat =', grazrat |
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| 318 | WRITE(numout,*) ' non assimilated fraction of P by microzoo unass =', unass |
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| 319 | WRITE(numout,*) ' Efficicency of microzoo growth epsher =', epsher |
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[10362] | 320 | WRITE(numout,*) ' Minimum efficicency of microzoo growth epshermin =', epshermin |
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[9169] | 321 | WRITE(numout,*) ' Fraction of microzoo excretion as DOM sigma1 =', sigma1 |
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| 322 | WRITE(numout,*) ' half sturation constant for grazing 1 xkgraz =', xkgraz |
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[3443] | 323 | ENDIF |
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[9124] | 324 | ! |
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[3443] | 325 | END SUBROUTINE p4z_micro_init |
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| 326 | |
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| 327 | !!====================================================================== |
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[5656] | 328 | END MODULE p4zmicro |
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