| 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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| 10 | #if defined key_pisces |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_pisces' PISCES bio-model |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !! p4z_micro : Compute the sources/sinks for microzooplankton |
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| 15 | !! p4z_micro_init : Initialize and read the appropriate namelist |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | USE oce_trc ! shared variables between ocean and passive tracers |
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| 18 | USE trc ! passive tracers common variables |
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| 19 | USE sms_pisces ! PISCES Source Minus Sink variables |
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| 20 | USE p4zlim ! Co-limitations |
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| 21 | USE p4zsink ! vertical flux of particulate matter due to sinking |
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| 22 | USE p4zint ! interpolation and computation of various fields |
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| 23 | USE p4zprod ! production |
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| 24 | USE prtctl_trc ! print control for debugging |
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| 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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| 29 | PUBLIC p4z_micro ! called in p4zbio.F90 |
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| 30 | PUBLIC p4z_micro_init ! called in trcsms_pisces.F90 |
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| 31 | PUBLIC p4z_micro_alloc ! called in trcsms_pisces.F90 |
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| 32 | |
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| 33 | !! * Shared module variables |
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| 34 | REAL(wp), PUBLIC :: part = 0.5_wp !: part of calcite not dissolved in microzoo guts |
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| 35 | REAL(wp), PUBLIC :: xpref2c = 0.2_wp !: microzoo preference for POC |
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| 36 | REAL(wp), PUBLIC :: xpref2p = 1.0_wp !: microzoo preference for nanophyto |
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| 37 | REAL(wp), PUBLIC :: xpref2d = 0.6_wp !: microzoo preference for diatoms |
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| 38 | REAL(wp), PUBLIC :: xthreshdia = 1E-8_wp !: diatoms feeding threshold for microzooplankton |
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| 39 | REAL(wp), PUBLIC :: xthreshphy = 2E-7_wp !: nanophyto threshold for microzooplankton |
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| 40 | REAL(wp), PUBLIC :: xthreshpoc = 1E-8_wp !: poc threshold for microzooplankton |
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| 41 | REAL(wp), PUBLIC :: xthresh = 0._wp !: feeding threshold for microzooplankton |
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| 42 | REAL(wp), PUBLIC :: resrat = 0.03_wp !: exsudation rate of microzooplankton |
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| 43 | REAL(wp), PUBLIC :: mzrat = 0.0_wp !: microzooplankton mortality rate |
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| 44 | REAL(wp), PUBLIC :: grazrat = 3.0_wp !: maximal microzoo grazing rate |
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| 45 | REAL(wp), PUBLIC :: xkgraz = 20E-6_wp !: non assimilated fraction of P by microzoo |
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| 46 | REAL(wp), PUBLIC :: unass = 0.3_wp !: Efficicency of microzoo growth |
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| 47 | REAL(wp), PUBLIC :: sigma1 = 0.6_wp !: Fraction of microzoo excretion as DOM |
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| 48 | REAL(wp), PUBLIC :: epsher = 0.3_wp !: half sturation constant for grazing 1 |
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| 49 | |
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| 50 | |
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| 51 | !!* Substitution |
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| 52 | # include "top_substitute.h90" |
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| 53 | !!---------------------------------------------------------------------- |
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| 54 | !! NEMO/TOP 3.3 , NEMO Consortium (2010) |
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| 55 | !! $Id$ |
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| 56 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 57 | !!---------------------------------------------------------------------- |
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| 58 | |
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| 59 | CONTAINS |
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| 60 | |
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| 61 | SUBROUTINE p4z_micro( kt ) |
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| 62 | !!--------------------------------------------------------------------- |
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| 63 | !! *** ROUTINE p4z_micro *** |
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| 64 | !! |
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| 65 | !! ** Purpose : Compute the sources/sinks for microzooplankton |
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| 66 | !! |
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| 67 | !! ** Method : - ??? |
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| 68 | !!--------------------------------------------------------------------- |
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| 69 | INTEGER, INTENT(in) :: kt ! ocean time step |
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| 70 | INTEGER :: ji, jj, jk |
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| 71 | REAL(wp) :: zcompadi, zcompaz , zcompaph, zcompapoc |
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| 72 | REAL(wp) :: zgraze , zdenom, zdenom2, zncratio |
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| 73 | REAL(wp) :: zfact , zstep, zfood, zfoodlim |
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| 74 | REAL(wp) :: zepshert, zepsherv, zgrarsig, zgraztot, zgraztotf |
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| 75 | REAL(wp) :: zgrarem, zgrafer, zgrapoc, zprcaca, zmortz |
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| 76 | REAL(wp) :: zrespz, ztortz, zgrasrat |
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| 77 | REAL(wp) :: zgrazp, zgrazm, zgrazsd |
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| 78 | REAL(wp) :: zgrazmf, zgrazsf, zgrazpf |
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| 79 | CHARACTER (len=25) :: charout |
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| 80 | !!--------------------------------------------------------------------- |
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| 81 | ! |
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| 82 | IF( nn_timing == 1 ) CALL timing_start('p4z_micro') |
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| 83 | ! |
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| 84 | grazing(:,:,:) = 0. !: grazing set to zero |
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| 85 | DO jk = 1, jpkm1 |
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| 86 | DO jj = 1, jpj |
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| 87 | DO ji = 1, jpi |
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| 88 | zcompaz = MAX( ( trn(ji,jj,jk,jpzoo) - 1.e-8 ), 0.e0 ) |
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| 89 | zstep = xstep |
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| 90 | # if defined key_degrad |
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| 91 | zstep = zstep * facvol(ji,jj,jk) |
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| 92 | # endif |
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| 93 | zfact = zstep * tgfunc2(ji,jj,jk) * zcompaz |
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| 94 | |
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| 95 | ! Respiration rates of both zooplankton |
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| 96 | ! ------------------------------------- |
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| 97 | zrespz = resrat * zfact * trn(ji,jj,jk,jpzoo) / ( 2. * xkmort + trn(ji,jj,jk,jpzoo) ) & |
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| 98 | & + resrat * zfact * 3. * nitrfac(ji,jj,jk) |
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| 99 | |
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| 100 | ! Zooplankton mortality. A square function has been selected with |
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| 101 | ! no real reason except that it seems to be more stable and may mimic predation. |
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| 102 | ! --------------------------------------------------------------- |
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| 103 | ztortz = mzrat * 1.e6 * zfact * trn(ji,jj,jk,jpzoo) |
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| 104 | |
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| 105 | zcompadi = MIN( MAX( ( trn(ji,jj,jk,jpdia) - xthreshdia ), 0.e0 ), xsizedia ) |
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| 106 | zcompaph = MAX( ( trn(ji,jj,jk,jpphy) - xthreshphy ), 0.e0 ) |
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| 107 | zcompapoc = MAX( ( trn(ji,jj,jk,jppoc) - xthreshpoc ), 0.e0 ) |
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| 108 | |
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| 109 | ! Microzooplankton grazing |
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| 110 | ! ------------------------ |
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| 111 | zfood = xpref2p * zcompaph + xpref2c * zcompapoc + xpref2d * zcompadi |
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| 112 | zfoodlim = MAX( 0. , zfood - xthresh ) |
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| 113 | zdenom = zfoodlim / ( xkgraz + zfoodlim ) |
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| 114 | zdenom2 = zdenom / ( zfood + rtrn ) |
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| 115 | zgraze = grazrat * zstep * tgfunc2(ji,jj,jk) * trn(ji,jj,jk,jpzoo) |
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| 116 | |
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| 117 | zgrazp = zgraze * xpref2p * zcompaph * zdenom2 |
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| 118 | zgrazm = zgraze * xpref2c * zcompapoc * zdenom2 |
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| 119 | zgrazsd = zgraze * xpref2d * zcompadi * zdenom2 |
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| 120 | |
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| 121 | zgrazpf = zgrazp * trn(ji,jj,jk,jpnfe) / (trn(ji,jj,jk,jpphy) + rtrn) |
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| 122 | zgrazmf = zgrazm * trn(ji,jj,jk,jpsfe) / (trn(ji,jj,jk,jppoc) + rtrn) |
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| 123 | zgrazsf = zgrazsd * trn(ji,jj,jk,jpdfe) / (trn(ji,jj,jk,jpdia) + rtrn) |
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| 124 | ! |
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| 125 | zgraztot = zgrazp + zgrazm + zgrazsd |
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| 126 | zgraztotf = zgrazpf + zgrazsf + zgrazmf |
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| 127 | |
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| 128 | ! Grazing by microzooplankton |
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| 129 | grazing(ji,jj,jk) = grazing(ji,jj,jk) + zgraztot |
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| 130 | |
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| 131 | ! Various remineralization and excretion terms |
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| 132 | ! -------------------------------------------- |
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| 133 | zgrasrat = zgraztotf / ( zgraztot + rtrn ) |
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| 134 | zncratio = ( xpref2p * zcompaph * quotan(ji,jj,jk) & |
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| 135 | & + xpref2d * zcompadi * quotad(ji,jj,jk) + xpref2c * zcompapoc ) / ( zfood + rtrn ) |
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| 136 | zepshert = epsher * MIN( 1., zncratio ) |
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| 137 | zepsherv = zepshert * MIN( 1., zgrasrat / ferat3 ) |
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| 138 | zgrafer = zgraztot * MAX( 0. , ( 1. - unass ) * zgrasrat - ferat3 * zepshert ) |
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| 139 | zgrarem = zgraztot * ( 1. - zepsherv - unass ) |
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| 140 | zgrapoc = zgraztot * unass |
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| 141 | |
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| 142 | ! Update of the TRA arrays |
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| 143 | ! ------------------------ |
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| 144 | zgrarsig = zgrarem * sigma1 |
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| 145 | tra(ji,jj,jk,jppo4) = tra(ji,jj,jk,jppo4) + zgrarsig |
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| 146 | tra(ji,jj,jk,jpnh4) = tra(ji,jj,jk,jpnh4) + zgrarsig |
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| 147 | tra(ji,jj,jk,jpdoc) = tra(ji,jj,jk,jpdoc) + zgrarem - zgrarsig |
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| 148 | tra(ji,jj,jk,jpoxy) = tra(ji,jj,jk,jpoxy) - o2ut * zgrarsig |
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| 149 | tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) + zgrafer |
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| 150 | tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zgrapoc |
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| 151 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + zgraztotf * unass |
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| 152 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zgrarsig |
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| 153 | tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) + rno3 * zgrarsig |
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| 154 | #if defined key_kriest |
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| 155 | tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) + zgrapoc * xkr_ddiat |
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| 156 | #endif |
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| 157 | ! Update the arrays TRA which contain the biological sources and sinks |
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| 158 | ! -------------------------------------------------------------------- |
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| 159 | zmortz = ztortz + zrespz |
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| 160 | tra(ji,jj,jk,jpzoo) = tra(ji,jj,jk,jpzoo) - zmortz + zepsherv * zgraztot |
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| 161 | tra(ji,jj,jk,jpphy) = tra(ji,jj,jk,jpphy) - zgrazp |
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| 162 | tra(ji,jj,jk,jpdia) = tra(ji,jj,jk,jpdia) - zgrazsd |
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| 163 | 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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| 164 | 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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| 165 | 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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| 166 | 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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| 167 | tra(ji,jj,jk,jpnfe) = tra(ji,jj,jk,jpnfe) - zgrazpf |
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| 168 | tra(ji,jj,jk,jpdfe) = tra(ji,jj,jk,jpdfe) - zgrazsf |
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| 169 | tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zmortz - zgrazm |
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| 170 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + ferat3 * zmortz - zgrazmf |
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| 171 | zprcaca = xfracal(ji,jj,jk) * zgrazp |
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| 172 | ! |
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| 173 | ! calcite production |
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| 174 | prodcal(ji,jj,jk) = prodcal(ji,jj,jk) + zprcaca ! prodcal=prodcal(nanophy)+prodcal(microzoo)+prodcal(mesozoo) |
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| 175 | ! |
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| 176 | zprcaca = part * zprcaca |
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| 177 | tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) - zprcaca |
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| 178 | tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) - 2. * zprcaca |
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| 179 | tra(ji,jj,jk,jpcal) = tra(ji,jj,jk,jpcal) + zprcaca |
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| 180 | #if defined key_kriest |
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| 181 | tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) + ( zmortz - zgrazm ) * xkr_ddiat |
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| 182 | #endif |
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| 183 | END DO |
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| 184 | END DO |
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| 185 | END DO |
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| 186 | ! |
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| 187 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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| 188 | WRITE(charout, FMT="('micro')") |
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| 189 | CALL prt_ctl_trc_info(charout) |
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| 190 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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| 191 | ENDIF |
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| 192 | ! |
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| 193 | IF( nn_timing == 1 ) CALL timing_stop('p4z_micro') |
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| 194 | ! |
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| 195 | END SUBROUTINE p4z_micro |
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| 196 | |
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| 197 | |
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| 198 | SUBROUTINE p4z_micro_init |
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| 199 | |
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| 200 | !!---------------------------------------------------------------------- |
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| 201 | !! *** ROUTINE p4z_micro_init *** |
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| 202 | !! |
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| 203 | !! ** Purpose : Initialization of microzooplankton parameters |
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| 204 | !! |
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| 205 | !! ** Method : Read the nampiszoo namelist and check the parameters |
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| 206 | !! called at the first timestep (nittrc000) |
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| 207 | !! |
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| 208 | !! ** input : Namelist nampiszoo |
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| 209 | !! |
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| 210 | !!---------------------------------------------------------------------- |
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| 211 | |
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| 212 | NAMELIST/nampiszoo/ part, grazrat, resrat, mzrat, xpref2c, xpref2p, & |
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| 213 | & xpref2d, xthreshdia, xthreshphy, xthreshpoc, & |
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| 214 | & xthresh, xkgraz, epsher, sigma1, unass |
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| 215 | |
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| 216 | REWIND( numnatp ) ! read numnatp |
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| 217 | READ ( numnatp, nampiszoo ) |
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| 218 | |
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| 219 | IF(lwp) THEN ! control print |
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| 220 | WRITE(numout,*) ' ' |
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| 221 | WRITE(numout,*) ' Namelist parameters for microzooplankton, nampiszoo' |
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| 222 | WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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| 223 | WRITE(numout,*) ' part of calcite not dissolved in microzoo guts part =', part |
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| 224 | WRITE(numout,*) ' microzoo preference for POC xpref2c =', xpref2c |
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| 225 | WRITE(numout,*) ' microzoo preference for nano xpref2p =', xpref2p |
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| 226 | WRITE(numout,*) ' microzoo preference for diatoms xpref2d =', xpref2d |
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| 227 | WRITE(numout,*) ' diatoms feeding threshold for microzoo xthreshdia =', xthreshdia |
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| 228 | WRITE(numout,*) ' nanophyto feeding threshold for microzoo xthreshphy =', xthreshphy |
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| 229 | WRITE(numout,*) ' poc feeding threshold for microzoo xthreshpoc =', xthreshpoc |
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| 230 | WRITE(numout,*) ' feeding threshold for microzooplankton xthresh =', xthresh |
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| 231 | WRITE(numout,*) ' exsudation rate of microzooplankton resrat =', resrat |
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| 232 | WRITE(numout,*) ' microzooplankton mortality rate mzrat =', mzrat |
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| 233 | WRITE(numout,*) ' maximal microzoo grazing rate grazrat =', grazrat |
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| 234 | WRITE(numout,*) ' non assimilated fraction of P by microzoo unass =', unass |
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| 235 | WRITE(numout,*) ' Efficicency of microzoo growth epsher =', epsher |
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| 236 | WRITE(numout,*) ' Fraction of microzoo excretion as DOM sigma1 =', sigma1 |
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| 237 | WRITE(numout,*) ' half sturation constant for grazing 1 xkgraz =', xkgraz |
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| 238 | ENDIF |
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| 239 | |
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| 240 | END SUBROUTINE p4z_micro_init |
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| 241 | |
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| 242 | INTEGER FUNCTION p4z_micro_alloc() |
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| 243 | !!---------------------------------------------------------------------- |
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| 244 | !! *** ROUTINE p4z_micro_alloc *** |
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| 245 | !!---------------------------------------------------------------------- |
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| 246 | ALLOCATE( grazing(jpi,jpj,jpk), STAT=p4z_micro_alloc ) |
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| 247 | IF( p4z_micro_alloc /= 0 ) CALL ctl_warn('p4z_micro_alloc : failed to allocate arrays.') |
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| 248 | |
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| 249 | END FUNCTION p4z_micro_alloc |
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| 250 | |
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| 251 | #else |
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| 252 | !!====================================================================== |
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| 253 | !! Dummy module : No PISCES bio-model |
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| 254 | !!====================================================================== |
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| 255 | CONTAINS |
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| 256 | SUBROUTINE p4z_micro ! Empty routine |
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| 257 | END SUBROUTINE p4z_micro |
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| 258 | #endif |
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| 259 | |
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| 260 | !!====================================================================== |
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| 261 | END MODULE p4zmicro |
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