MODULE p4zmeso !!====================================================================== !! *** MODULE p4zmeso *** !! TOP : PISCES Compute the sources/sinks for mesozooplankton !!====================================================================== !! History : 1.0 ! 2002 (O. Aumont) Original code !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Quota model for iron !!---------------------------------------------------------------------- #if defined key_pisces !!---------------------------------------------------------------------- !! 'key_pisces' PISCES bio-model !!---------------------------------------------------------------------- !! p4z_meso : Compute the sources/sinks for mesozooplankton !! p4z_meso_init : Initialization of the parameters for mesozooplankton !!---------------------------------------------------------------------- USE oce_trc ! shared variables between ocean and passive tracers USE trc ! passive tracers common variables USE sms_pisces ! PISCES Source Minus Sink variables USE p4zsink ! vertical flux of particulate matter due to sinking USE p4zint ! interpolation and computation of various fields USE p4zprod ! production USE prtctl_trc ! print control for debugging USE iom ! I/O manager IMPLICIT NONE PRIVATE PUBLIC p4z_meso ! called in p4zbio.F90 PUBLIC p4z_meso_init ! called in trcsms_pisces.F90 !! * Shared module variables REAL(wp), PUBLIC :: part2 = 0.5_wp !: part of calcite not dissolved in mesozoo guts REAL(wp), PUBLIC :: xprefc = 1.0_wp !: mesozoo preference for POC REAL(wp), PUBLIC :: xprefp = 0.3_wp !: mesozoo preference for nanophyto REAL(wp), PUBLIC :: xprefz = 1.0_wp !: mesozoo preference for diatoms REAL(wp), PUBLIC :: xprefpoc = 0.3_wp !: mesozoo preference for POC REAL(wp), PUBLIC :: xthresh2zoo = 1E-8_wp !: zoo feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2dia = 1E-8_wp !: diatoms feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2phy = 2E-7_wp !: nanophyto feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2poc = 1E-8_wp !: poc feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2 = 0._wp !: feeding threshold for mesozooplankton REAL(wp), PUBLIC :: resrat2 = 0.005_wp !: exsudation rate of mesozooplankton REAL(wp), PUBLIC :: mzrat2 = 0.04_wp !: microzooplankton mortality rate REAL(wp), PUBLIC :: grazrat2 = 0.9_wp !: maximal mesozoo grazing rate REAL(wp), PUBLIC :: xkgraz2 = 20E-6_wp !: non assimilated fraction of P by mesozoo REAL(wp), PUBLIC :: unass2 = 0.3_wp !: Efficicency of mesozoo growth REAL(wp), PUBLIC :: sigma2 = 0.6_wp !: Fraction of mesozoo excretion as DOM REAL(wp), PUBLIC :: epsher2 = 0.3_wp !: half sturation constant for grazing 2 REAL(wp), PUBLIC :: grazflux = 3.E3_wp !: mesozoo flux feeding rate !!* Substitution # include "top_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/TOP 3.3 , NEMO Consortium (2010) !! $Id$ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE p4z_meso( kt, jnt ) !!--------------------------------------------------------------------- !! *** ROUTINE p4z_meso *** !! !! ** Purpose : Compute the sources/sinks for mesozooplankton !! !! ** Method : - ??? !!--------------------------------------------------------------------- INTEGER, INTENT(in) :: kt, jnt ! ocean time step INTEGER :: ji, jj, jk REAL(wp) :: zcompadi, zcompaph, zcompapoc, zcompaz, zcompam REAL(wp) :: zgraze2 , zdenom, zdenom2, zncratio REAL(wp) :: zfact , zstep, zfood, zfoodlim REAL(wp) :: zepshert, zepsherv, zgrarsig, zgraztot, zgraztotf REAL(wp) :: zgrarem2, zgrafer2, zgrapoc2, zprcaca, zmortz2, zgrasrat #if defined key_kriest REAL znumpoc #endif REAL(wp) :: zrespz2, ztortz2, zgrazd, zgrazz, zgrazpof REAL(wp) :: zgrazn, zgrazpoc, zgraznf, zgrazf REAL(wp) :: zgrazfff, zgrazffe CHARACTER (len=25) :: charout REAL(wp) :: zrfact2 !!--------------------------------------------------------------------- DO jk = 1, jpkm1 DO jj = 1, jpj DO ji = 1, jpi zcompam = MAX( ( trn(ji,jj,jk,jpmes) - 1.e-8 ), 0.e0 ) # if defined key_degrad zstep = xstep * facvol(ji,jj,jk) # else zstep = xstep # endif zfact = zstep * tgfunc(ji,jj,jk) * zcompam ! Respiration rates of both zooplankton ! ------------------------------------- zrespz2 = resrat2 * zfact * trn(ji,jj,jk,jpmes) / ( xkmort + trn(ji,jj,jk,jpmes) ) & & + resrat2 * zfact * 3. * nitrfac(ji,jj,jk) ! Zooplankton mortality. A square function has been selected with ! no real reason except that it seems to be more stable and may mimic predation ! --------------------------------------------------------------- ztortz2 = mzrat2 * 1.e6 * zfact * trn(ji,jj,jk,jpmes) ! zcompadi = MAX( ( trn(ji,jj,jk,jpdia) - xthresh2dia ), 0.e0 ) zcompaz = MAX( ( trn(ji,jj,jk,jpzoo) - xthresh2zoo ), 0.e0 ) zcompaph = MAX( ( trn(ji,jj,jk,jpphy) - xthresh2phy ), 0.e0 ) zcompapoc = MAX( ( trn(ji,jj,jk,jppoc) - xthresh2poc ), 0.e0 ) zfood = xprefc * zcompadi + xprefz * zcompaz + xprefp * zcompaph + xprefpoc * zcompapoc zfoodlim = MAX( 0., zfood - xthresh2 ) zdenom = zfoodlim / ( xkgraz2 + zfoodlim ) zdenom2 = zdenom / ( zfood + rtrn ) zgraze2 = grazrat2 * zstep * tgfunc2(ji,jj,jk) * trn(ji,jj,jk,jpmes) zgrazd = zgraze2 * xprefc * zcompadi * zdenom2 zgrazz = zgraze2 * xprefz * zcompaz * zdenom2 zgrazn = zgraze2 * xprefp * zcompaph * zdenom2 zgrazpoc = zgraze2 * xprefpoc * zcompapoc * zdenom2 zgraznf = zgrazn * trn(ji,jj,jk,jpnfe) / ( trn(ji,jj,jk,jpphy) + rtrn) zgrazf = zgrazd * trn(ji,jj,jk,jpdfe) / ( trn(ji,jj,jk,jpdia) + rtrn) zgrazpof = zgrazpoc * trn(ji,jj,jk,jpsfe) / ( trn(ji,jj,jk,jppoc) + rtrn) ! Mesozooplankton flux feeding on GOC ! ---------------------------------- # if ! defined key_kriest zgrazffe = grazflux * zstep * wsbio4(ji,jj,jk) & & * tgfunc2(ji,jj,jk) * trn(ji,jj,jk,jpgoc) * trn(ji,jj,jk,jpmes) zgrazfff = zgrazffe * trn(ji,jj,jk,jpbfe) / (trn(ji,jj,jk,jpgoc) + rtrn) # else zgrazffe = grazflux * zstep * wsbio3(ji,jj,jk) & zgrazfff = zgrazffe * trn(ji,jj,jk,jpsfe) / (trn(ji,jj,jk,jppoc) + rtrn) # endif ! zgraztot = zgrazd + zgrazz + zgrazn + zgrazpoc + zgrazffe zgraztotf = zgrazf + zgraznf + zgrazz * ferat3 + zgrazpof + zgrazfff ! Total grazing ( grazing by microzoo is already computed in p4zmicro ) grazing(ji,jj,jk) = grazing(ji,jj,jk) + zgraztot ! Mesozooplankton efficiency ! -------------------------- zgrasrat = zgraztotf / ( zgraztot + rtrn ) zncratio = ( xprefc * zcompadi * quotad(ji,jj,jk) & & + xprefp * zcompaph * quotan(ji,jj,jk) & & + xprefz * zcompaz & & + xprefpoc * zcompapoc ) / ( zfood + rtrn ) zepshert = epsher2 * MIN( 1., zncratio ) zepsherv = zepshert * MIN( 1., zgrasrat / ferat3 ) zgrarem2 = zgraztot * ( 1. - zepsherv - unass2 ) zgrafer2 = zgraztot * MAX( 0. , ( 1. - unass2 ) * zgrasrat - ferat3 * zepshert ) zgrapoc2 = zgraztot * unass2 ! Update the arrays TRA which contain the biological sources and sinks zgrarsig = zgrarem2 * sigma2 tra(ji,jj,jk,jppo4) = tra(ji,jj,jk,jppo4) + zgrarsig tra(ji,jj,jk,jpnh4) = tra(ji,jj,jk,jpnh4) + zgrarsig tra(ji,jj,jk,jpdoc) = tra(ji,jj,jk,jpdoc) + zgrarem2 - zgrarsig tra(ji,jj,jk,jpoxy) = tra(ji,jj,jk,jpoxy) - o2ut * zgrarsig tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) + zgrafer2 tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zgrarsig tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) + rno3 * zgrarsig #if defined key_kriest tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zgrapoc2 tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) + zgrapoc2 * xkr_dmeso tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + zgraztotf * unass2 #else tra(ji,jj,jk,jpgoc) = tra(ji,jj,jk,jpgoc) + zgrapoc2 tra(ji,jj,jk,jpbfe) = tra(ji,jj,jk,jpbfe) + zgraztotf * unass2 #endif zmortz2 = ztortz2 + zrespz2 tra(ji,jj,jk,jpmes) = tra(ji,jj,jk,jpmes) - zmortz2 + zepsherv * zgraztot tra(ji,jj,jk,jpdia) = tra(ji,jj,jk,jpdia) - zgrazd tra(ji,jj,jk,jpzoo) = tra(ji,jj,jk,jpzoo) - zgrazz tra(ji,jj,jk,jpphy) = tra(ji,jj,jk,jpphy) - zgrazn tra(ji,jj,jk,jpnch) = tra(ji,jj,jk,jpnch) - zgrazn * trn(ji,jj,jk,jpnch) / ( trn(ji,jj,jk,jpphy) + rtrn ) tra(ji,jj,jk,jpdch) = tra(ji,jj,jk,jpdch) - zgrazd * trn(ji,jj,jk,jpdch) / ( trn(ji,jj,jk,jpdia) + rtrn ) tra(ji,jj,jk,jpbsi) = tra(ji,jj,jk,jpbsi) - zgrazd * trn(ji,jj,jk,jpbsi) / ( trn(ji,jj,jk,jpdia) + rtrn ) tra(ji,jj,jk,jpdsi) = tra(ji,jj,jk,jpdsi) + zgrazd * trn(ji,jj,jk,jpbsi) / ( trn(ji,jj,jk,jpdia) + rtrn ) tra(ji,jj,jk,jpnfe) = tra(ji,jj,jk,jpnfe) - zgraznf tra(ji,jj,jk,jpdfe) = tra(ji,jj,jk,jpdfe) - zgrazf zprcaca = xfracal(ji,jj,jk) * zgrazn ! calcite production prodcal(ji,jj,jk) = prodcal(ji,jj,jk) + zprcaca ! prodcal=prodcal(nanophy)+prodcal(microzoo)+prodcal(mesozoo) ! zprcaca = part2 * zprcaca tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) - zprcaca tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) - 2. * zprcaca tra(ji,jj,jk,jpcal) = tra(ji,jj,jk,jpcal) + zprcaca #if defined key_kriest znumpoc = trn(ji,jj,jk,jpnum) / ( trn(ji,jj,jk,jppoc) + rtrn ) tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zmortz2 - zgrazpoc - zgrazffe tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) - zgrazpoc * znumpoc & & + zmortz2 * xkr_dmeso - zgrazffe * znumpoc * wsbio4(ji,jj,jk) / ( wsbio3(ji,jj,jk) + rtrn ) tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + ferat3 * zmortz2 - zgrazfff - zgrazpof #else tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) - zgrazpoc tra(ji,jj,jk,jpgoc) = tra(ji,jj,jk,jpgoc) + zmortz2 - zgrazffe tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) - zgrazpof tra(ji,jj,jk,jpbfe) = tra(ji,jj,jk,jpbfe) + ferat3 * zmortz2 - zgrazfff #endif END DO END DO END DO ! IF( ln_diatrc .AND. lk_iomput ) THEN zrfact2 = 1.e3 * rfact2r grazing(:,:,:) = grazing(:,:,:) * zrfact2 * tmask(:,:,:) ! Total grazing of phyto by zoo prodcal(:,:,:) = prodcal(:,:,:) * zrfact2 * tmask(:,:,:) ! Calcite production IF( jnt == nrdttrc ) THEN CALL iom_put( "GRAZ" , grazing ) ! Total grazing of phyto by zooplankton CALL iom_put( "PCAL" , prodcal ) ! Calcite production ENDIF ENDIF ! IF(ln_ctl) THEN ! print mean trends (used for debugging) WRITE(charout, FMT="('meso')") CALL prt_ctl_trc_info(charout) CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) ENDIF END SUBROUTINE p4z_meso SUBROUTINE p4z_meso_init !!---------------------------------------------------------------------- !! *** ROUTINE p4z_meso_init *** !! !! ** Purpose : Initialization of mesozooplankton parameters !! !! ** Method : Read the nampismes namelist and check the parameters !! called at the first timestep (nittrc000) !! !! ** input : Namelist nampismes !! !!---------------------------------------------------------------------- NAMELIST/nampismes/ part2, grazrat2, resrat2, mzrat2, xprefc, xprefp, xprefz, & & xprefpoc, xthresh2dia, xthresh2phy, xthresh2zoo, xthresh2poc, & & xthresh2, xkgraz2, epsher2, sigma2, unass2, grazflux REWIND( numnatp ) ! read numnatp READ ( numnatp, nampismes ) IF(lwp) THEN ! control print WRITE(numout,*) ' ' WRITE(numout,*) ' Namelist parameters for mesozooplankton, nampismes' WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' WRITE(numout,*) ' part of calcite not dissolved in mesozoo guts part2 =', part2 WRITE(numout,*) ' mesozoo preference for phyto xprefc =', xprefc WRITE(numout,*) ' mesozoo preference for POC xprefp =', xprefp WRITE(numout,*) ' mesozoo preference for zoo xprefz =', xprefz WRITE(numout,*) ' mesozoo preference for poc xprefpoc =', xprefpoc WRITE(numout,*) ' microzoo feeding threshold for mesozoo xthresh2zoo =', xthresh2zoo WRITE(numout,*) ' diatoms feeding threshold for mesozoo xthresh2dia =', xthresh2dia WRITE(numout,*) ' nanophyto feeding threshold for mesozoo xthresh2phy =', xthresh2phy WRITE(numout,*) ' poc feeding threshold for mesozoo xthresh2poc =', xthresh2poc WRITE(numout,*) ' feeding threshold for mesozooplankton xthresh2 =', xthresh2 WRITE(numout,*) ' exsudation rate of mesozooplankton resrat2 =', resrat2 WRITE(numout,*) ' mesozooplankton mortality rate mzrat2 =', mzrat2 WRITE(numout,*) ' maximal mesozoo grazing rate grazrat2 =', grazrat2 WRITE(numout,*) ' mesozoo flux feeding rate grazflux =', grazflux WRITE(numout,*) ' non assimilated fraction of P by mesozoo unass2 =', unass2 WRITE(numout,*) ' Efficicency of Mesozoo growth epsher2 =', epsher2 WRITE(numout,*) ' Fraction of mesozoo excretion as DOM sigma2 =', sigma2 WRITE(numout,*) ' half sturation constant for grazing 2 xkgraz2 =', xkgraz2 ENDIF END SUBROUTINE p4z_meso_init #else !!====================================================================== !! Dummy module : No PISCES bio-model !!====================================================================== CONTAINS SUBROUTINE p4z_meso ! Empty routine END SUBROUTINE p4z_meso #endif !!====================================================================== END MODULE p4zmeso