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 !: part of calcite not dissolved in mesozoo guts REAL(wp), PUBLIC :: xprefc !: mesozoo preference for POC REAL(wp), PUBLIC :: xprefp !: mesozoo preference for nanophyto REAL(wp), PUBLIC :: xprefz !: mesozoo preference for diatoms REAL(wp), PUBLIC :: xprefpoc !: mesozoo preference for POC REAL(wp), PUBLIC :: xthresh2zoo !: zoo feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2dia !: diatoms feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2phy !: nanophyto feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2poc !: poc feeding threshold for mesozooplankton REAL(wp), PUBLIC :: xthresh2 !: feeding threshold for mesozooplankton REAL(wp), PUBLIC :: resrat2 !: exsudation rate of mesozooplankton REAL(wp), PUBLIC :: mzrat2 !: microzooplankton mortality rate REAL(wp), PUBLIC :: grazrat2 !: maximal mesozoo grazing rate REAL(wp), PUBLIC :: xkgraz2 !: non assimilated fraction of P by mesozoo REAL(wp), PUBLIC :: unass2 !: Efficicency of mesozoo growth REAL(wp), PUBLIC :: sigma2 !: Fraction of mesozoo excretion as DOM REAL(wp), PUBLIC :: epsher2 !: half sturation constant for grazing 2 REAL(wp), PUBLIC :: grazflux !: 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 REAL(wp) :: zfact , zstep, zfood, zfoodlim, zproport REAL(wp) :: zmortzgoc, zfrac, zfracfe, zratio, zratio2 REAL(wp) :: zepshert, zepsherv, zgrarsig, zgraztot, zgraztotn, zgraztotf REAL(wp) :: zgrarem2, zgrafer2, zgrapoc2, zprcaca, zmortz2, zgrasrat, zgrasratn #if defined key_kriest REAL znumpoc #endif REAL(wp) :: zrespz2, ztortz2, zgrazd, zgrazz, zgrazpof REAL(wp) :: zgrazn, zgrazpoc, zgraznf, zgrazf REAL(wp) :: zgrazfffp, zgrazfffg, zgrazffep, zgrazffeg CHARACTER (len=25) :: charout REAL(wp), POINTER, DIMENSION(:,:,:) :: zgrazing, zw3d !!--------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('p4z_meso') ! IF( lk_iomput ) THEN CALL wrk_alloc( jpi, jpj, jpk, zgrazing ) zgrazing(:,:,:) = 0._wp ENDIF DO jk = 1, jpkm1 DO jj = 1, jpj DO ji = 1, jpi zcompam = MAX( ( trn(ji,jj,jk,jpmes) - 1.e-9 ), 0.e0 ) # if defined key_degrad zstep = xstep * facvol(ji,jj,jk) # else zstep = xstep # endif zfact = zstep * tgfunc2(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 ) ! Size effect of nanophytoplankton on grazing : the smaller it is, the less prone ! it is to predation by mesozooplankton ! ------------------------------------------------------------------------------- zcompaph = MAX( ( trn(ji,jj,jk,jpphy) - xthresh2phy ), 0.e0 ) & & * MIN(1., MAX( 0., ( quotan(ji,jj,jk) - 0.2) / 0.3 ) ) zcompapoc = MAX( ( trn(ji,jj,jk,jppoc) - xthresh2poc ), 0.e0 ) zfood = xprefc * zcompadi + xprefz * zcompaz + xprefp * zcompaph + xprefpoc * zcompapoc zfoodlim = MAX( 0., zfood - MIN( 0.5 * 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 zgrazffeg = grazflux * zstep * wsbio4(ji,jj,jk) & & * tgfunc2(ji,jj,jk) * trn(ji,jj,jk,jpgoc) * trn(ji,jj,jk,jpmes) zgrazfffg = zgrazffeg * trn(ji,jj,jk,jpbfe) / (trn(ji,jj,jk,jpgoc) + rtrn) # endif zgrazffep = grazflux * zstep * wsbio3(ji,jj,jk) & & * tgfunc2(ji,jj,jk) * trn(ji,jj,jk,jppoc) * trn(ji,jj,jk,jpmes) zgrazfffp = zgrazffep * trn(ji,jj,jk,jpsfe) / (trn(ji,jj,jk,jppoc) + rtrn) ! # if ! defined key_kriest zgraztot = zgrazd + zgrazz + zgrazn + zgrazpoc + zgrazffep + zgrazffeg ! Compute the proportion of filter feeders zproport = (zgrazffep + zgrazffeg)/(rtrn + zgraztot) ! Compute fractionation of aggregates. It is assumed that ! diatoms based aggregates are more prone to fractionation ! since they are more porous (marine snow instead of fecal pellets) zratio = trn(ji,jj,jk,jpgsi) / ( trn(ji,jj,jk,jpgoc) + rtrn ) zratio2 = zratio * zratio zfrac = zproport * grazflux * zstep * wsbio4(ji,jj,jk) & & * trn(ji,jj,jk,jpgoc) * trn(ji,jj,jk,jpmes) & & * ( 0.2 + 3.8 * zratio2 / ( 1.**2 + zratio2 ) ) zfracfe = zfrac * trn(ji,jj,jk,jpbfe) / (trn(ji,jj,jk,jpgoc) + rtrn) zgrazffep = zproport * zgrazffep zgrazffeg = zproport * zgrazffeg zgrazfffp = zproport * zgrazfffp zgrazfffg = zproport * zgrazfffg zgraztot = zgrazd + zgrazz + zgrazn + zgrazpoc + zgrazffep + zgrazffeg zgraztotn = zgrazd * quotad(ji,jj,jk) + zgrazz + zgrazn * quotan(ji,jj,jk) & & + zgrazpoc + zgrazffep + zgrazffeg zgraztotf = zgrazf + zgraznf + zgrazz * ferat3 + zgrazpof + zgrazfffp + zgrazfffg # else zgraztot = zgrazd + zgrazz + zgrazn + zgrazpoc + zgrazffep ! Compute the proportion of filter feeders zproport = zgrazffep / ( zgraztot + rtrn ) zgrazffep = zproport * zgrazffep zgrazfffp = zproport * zgrazfffp zgraztot = zgrazd + zgrazz + zgrazn + zgrazpoc + zgrazffep zgraztotn = zgrazd * quotad(ji,jj,jk) + zgrazz + zgrazn * quotan(ji,jj,jk) + zgrazpoc + zgrazffep zgraztotf = zgrazf + zgraznf + zgrazz * ferat3 + zgrazpof + zgrazfffp # endif ! Total grazing ( grazing by microzoo is already computed in p4zmicro ) IF( lk_iomput ) zgrazing(ji,jj,jk) = zgraztot ! Mesozooplankton efficiency ! -------------------------- zgrasrat = ( zgraztotf +rtrn )/ ( zgraztot + rtrn ) zgrasratn = ( zgraztotn +rtrn )/ ( zgraztot + rtrn ) zepshert = MIN( 1., zgrasratn, zgrasrat / ferat3) zepsherv = zepshert * MIN( epsher2, (1. - unass2) * zgrasrat / ferat3, (1. - unass2) * zgrasratn ) zgrarem2 = zgraztot * ( 1. - zepsherv - unass2 ) & & + ( 1. - epsher2 - unass2 ) / ( 1. - epsher2 ) * ztortz2 zgrafer2 = zgraztot * MAX( 0. , ( 1. - unass2 ) * zgrasrat - ferat3 * zepsherv ) & & + ferat3 * ( ( 1. - epsher2 - unass2 ) /( 1. - epsher2 ) * ztortz2 ) 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 zmortz2 = ztortz2 + zrespz2 zmortzgoc = unass2 / ( 1. - epsher2 ) * 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,jpdsi) = tra(ji,jj,jk,jpdsi) - zgrazd * trn(ji,jj,jk,jpdsi) / ( trn(ji,jj,jk,jpdia) + rtrn ) tra(ji,jj,jk,jpgsi) = tra(ji,jj,jk,jpgsi) + zgrazd * trn(ji,jj,jk,jpdsi) / ( 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 ! calcite production zprcaca = xfracal(ji,jj,jk) * zgrazn 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) + zmortzgoc - zgrazpoc - zgrazffep + zgrapoc2 tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) - zgrazpoc * znumpoc + zgrapoc2 * xkr_dmeso & & + zmortzgoc * xkr_dmeso - zgrazffep * znumpoc * wsbio4(ji,jj,jk) / ( wsbio3(ji,jj,jk) + rtrn ) tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + ferat3 * zmortzgoc - zgrazfffp - zgrazpof & & + zgraztotf * unass2 #else tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) - zgrazpoc - zgrazffep + zfrac tra(ji,jj,jk,jpgoc) = tra(ji,jj,jk,jpgoc) + zmortzgoc - zgrazffeg + zgrapoc2 - zfrac tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) - zgrazpof - zgrazfffp + zfracfe tra(ji,jj,jk,jpbfe) = tra(ji,jj,jk,jpbfe) + ferat3 * zmortzgoc - zgrazfffg & & + zgraztotf * unass2 - zfracfe #endif END DO END DO END DO ! IF( lk_iomput .AND. jnt == nrdttrc ) THEN CALL wrk_alloc( jpi, jpj, jpk, zw3d ) IF( iom_use( "GRAZ2" ) ) THEN zw3d(:,:,:) = zgrazing(:,:,:) * 1.e+3 * rfact2r * tmask(:,:,:) ! Total grazing of phyto by zooplankton CALL iom_put( "GRAZ2", zw3d ) ENDIF IF( iom_use( "PCAL" ) ) THEN zw3d(:,:,:) = prodcal(:,:,:) * 1.e+3 * rfact2r * tmask(:,:,:) ! Calcite production CALL iom_put( "PCAL", zw3d ) ENDIF CALL wrk_dealloc( jpi, jpj, jpk, zw3d ) 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 ! IF( lk_iomput ) CALL wrk_dealloc( jpi, jpj, jpk, zgrazing ) ! IF( nn_timing == 1 ) CALL timing_stop('p4z_meso') ! 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 INTEGER :: ios ! Local integer output status for namelist read REWIND( numnatp_ref ) ! Namelist nampismes in reference namelist : Pisces mesozooplankton READ ( numnatp_ref, nampismes, IOSTAT = ios, ERR = 901) 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampismes in reference namelist', lwp ) REWIND( numnatp_cfg ) ! Namelist nampismes in configuration namelist : Pisces mesozooplankton READ ( numnatp_cfg, nampismes, IOSTAT = ios, ERR = 902 ) 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampismes in configuration namelist', lwp ) IF(lwm) WRITE ( numonp, 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