MODULE p4zmicro !!====================================================================== !! *** MODULE p4zmicro *** !! TOP : PISCES Compute the sources/sinks for microzooplankton !!====================================================================== !! History : 1.0 ! 2004 (O. Aumont) Original code !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 !!---------------------------------------------------------------------- #if defined key_pisces !!---------------------------------------------------------------------- !! 'key_pisces' PISCES bio-model !!---------------------------------------------------------------------- !! p4z_micro : Compute the sources/sinks for microzooplankton !! p4z_micro_init : Initialize and read the appropriate namelist !!---------------------------------------------------------------------- USE trc USE oce_trc ! USE trc ! USE sms_pisces ! USE prtctl_trc USE p4zint USE p4zsink USE iom IMPLICIT NONE PRIVATE PUBLIC p4z_micro ! called in p4zbio.F90 !! * Shared module variables REAL(wp), PUBLIC :: & xpref2c = 0.0_wp , & !: xpref2p = 0.5_wp , & !: xpref2d = 0.5_wp , & !: resrat = 0.03_wp , & !: mzrat = 0.0_wp , & !: grazrat = 4.0_wp , & !: xkgraz = 20E-6_wp , & !: unass = 0.3_wp , & !: sigma1 = 0.6_wp , & !: epsher = 0.33_wp !!* Substitution # include "top_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) !! $Id$ !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE p4z_micro( kt,jnt ) !!--------------------------------------------------------------------- !! *** ROUTINE p4z_micro *** !! !! ** Purpose : Compute the sources/sinks for microzooplankton !! !! ** Method : - ??? !!--------------------------------------------------------------------- INTEGER, INTENT(in) :: kt, jnt ! ocean time step INTEGER :: ji, jj, jk REAL(wp) :: zcompadi, zcompadi2, zcompaz , zcompaph, zcompapoc REAL(wp) :: zgraze , zdenom , zdenom2 REAL(wp) :: zfact , zstep , zinano , zidiat, zipoc REAL(wp) :: zgrarem, zgrafer, zgrapoc, zprcaca, zmortz REAL(wp), DIMENSION(jpi,jpj,jpk) :: zrespz,ztortz REAL(wp), DIMENSION(jpi,jpj,jpk) :: zgrazp, zgrazm, zgrazsd REAL(wp), DIMENSION(jpi,jpj,jpk) :: zgrazmf, zgrazsf, zgrazpf CHARACTER (len=25) :: charout !!--------------------------------------------------------------------- IF( ( kt * jnt ) == nittrc000 ) CALL p4z_micro_init ! Initialization (first time-step only) zrespz (:,:,:) = 0. ztortz (:,:,:) = 0. zgrazp (:,:,:) = 0. zgrazm (:,:,:) = 0. zgrazsd(:,:,:) = 0. zgrazmf(:,:,:) = 0. zgrazsf(:,:,:) = 0. zgrazpf(:,:,:) = 0. #if defined key_trc_dia3d grazing(:,:,:) = 0. !: Initialisation of grazing #endif zstep = rfact2 / rday ! Time step duration for biology DO jk = 1, jpkm1 DO jj = 1, jpj DO ji = 1, jpi zcompaz = MAX( ( trn(ji,jj,jk,jpzoo) - 1.e-9 ), 0.e0 ) # if defined key_off_degrad zfact = zstep * tgfunc(ji,jj,jk) * zcompaz *facvol(ji,jj,jk) # else zfact = zstep * tgfunc(ji,jj,jk) * zcompaz # endif ! Respiration rates of both zooplankton ! ------------------------------------- zrespz(ji,jj,jk) = resrat * zfact * ( 1.+ 3.* nitrfac(ji,jj,jk) ) & & * trn(ji,jj,jk,jpzoo) / ( xkmort + trn(ji,jj,jk,jpzoo) ) ! Zooplankton mortality. A square function has been selected with ! no real reason except that it seems to be more stable and may ! mimic predation. ! --------------------------------------------------------------- ztortz(ji,jj,jk) = mzrat * 1.e6 * zfact * trn(ji,jj,jk,jpzoo) END DO END DO END DO DO jk = 1,jpkm1 DO jj = 1,jpj DO ji = 1,jpi zcompadi = MAX( ( trn(ji,jj,jk,jpdia) - 1.e-8 ), 0.e0 ) zcompadi2 = MIN( zcompadi, 5.e-7 ) zcompaph = MAX( ( trn(ji,jj,jk,jpphy) - 2.e-7 ), 0.e0 ) zcompapoc = MAX( ( trn(ji,jj,jk,jppoc) - 1.e-8 ), 0.e0 ) ! Microzooplankton grazing ! ------------------------ zdenom2 = 1./ ( xpref2p * zcompaph + xpref2c * zcompapoc + xpref2d * zcompadi2 + rtrn ) zgraze = grazrat * zstep * tgfunc(ji,jj,jk) & # if defined key_off_degrad & * facvol(ji,jj,jk) & # endif & * trn(ji,jj,jk,jpzoo) zinano = xpref2p * zcompaph * zdenom2 zipoc = xpref2c * zcompapoc * zdenom2 zidiat = xpref2d * zcompadi2 * zdenom2 zdenom = 1./ ( xkgraz + zinano * zcompaph + zipoc * zcompapoc + zidiat * zcompadi2 ) zgrazp(ji,jj,jk) = zgraze * zinano * zcompaph * zdenom zgrazm(ji,jj,jk) = zgraze * zipoc * zcompapoc * zdenom zgrazsd(ji,jj,jk) = zgraze * zidiat * zcompadi2 * zdenom zgrazpf (ji,jj,jk) = zgrazp(ji,jj,jk) * trn(ji,jj,jk,jpnfe) / (trn(ji,jj,jk,jpphy) + rtrn) zgrazmf(ji,jj,jk) = zgrazm(ji,jj,jk) * trn(ji,jj,jk,jpsfe) / (trn(ji,jj,jk,jppoc) + rtrn) zgrazsf(ji,jj,jk) = zgrazsd(ji,jj,jk) * trn(ji,jj,jk,jpdfe) / (trn(ji,jj,jk,jpdia) + rtrn) END DO END DO END DO #if defined key_trc_dia3d ! Grazing by microzooplankton grazing(:,:,:) = grazing(:,:,:) + zgrazp(:,:,:) + zgrazm(:,:,:) + zgrazsd(:,:,:) #endif DO jk = 1,jpkm1 DO jj = 1,jpj DO ji = 1,jpi ! Various remineralization and excretion terms ! -------------------------------------------- zgrarem = ( zgrazp(ji,jj,jk) + zgrazm(ji,jj,jk) + zgrazsd(ji,jj,jk) ) & & * ( 1.- epsher - unass ) zgrafer = ( zgrazpf(ji,jj,jk) + zgrazsf(ji,jj,jk) + zgrazmf(ji,jj,jk) ) & & * ( 1.- epsher - unass ) + epsher * & & ( zgrazm(ji,jj,jk) * MAX((trn(ji,jj,jk,jpsfe) /(trn(ji,jj,jk,jppoc)+ rtrn)-ferat3),0.e0) & & + zgrazp(ji,jj,jk) * MAX((trn(ji,jj,jk,jpnfe)/(trn(ji,jj,jk,jpphy)+ rtrn)-ferat3),0.e0) & & + zgrazsd(ji,jj,jk) * MAX((trn(ji,jj,jk,jpdfe)/(trn(ji,jj,jk,jpdia)+ rtrn)-ferat3),0.e0 ) ) zgrapoc = ( zgrazp(ji,jj,jk) + zgrazm(ji,jj,jk) + zgrazsd(ji,jj,jk) ) * unass ! Update of the TRA arrays ! ------------------------ tra(ji,jj,jk,jppo4) = tra(ji,jj,jk,jppo4) + zgrarem * sigma1 tra(ji,jj,jk,jpnh4) = tra(ji,jj,jk,jpnh4) + zgrarem * sigma1 tra(ji,jj,jk,jpdoc) = tra(ji,jj,jk,jpdoc) + zgrarem * (1.-sigma1) tra(ji,jj,jk,jpoxy) = tra(ji,jj,jk,jpoxy) - o2ut * zgrarem * sigma1 tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) + zgrafer tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zgrapoc tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zgrarem * sigma1 #if defined key_kriest tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) + zgrapoc * xkr_ddiat #endif END DO END DO END DO ! ! Update the arrays TRA which contain the biological sources and sinks ! -------------------------------------------------------------------- DO jk = 1, jpkm1 DO jj = 1, jpj DO ji = 1, jpi zmortz = ztortz(ji,jj,jk) + zrespz(ji,jj,jk) tra(ji,jj,jk,jpzoo) = tra(ji,jj,jk,jpzoo) - zmortz & & + epsher * ( zgrazp(ji,jj,jk) + zgrazm(ji,jj,jk) + zgrazsd(ji,jj,jk)) tra(ji,jj,jk,jpphy) = tra(ji,jj,jk,jpphy) - zgrazp(ji,jj,jk) tra(ji,jj,jk,jpdia) = tra(ji,jj,jk,jpdia) - zgrazsd(ji,jj,jk) tra(ji,jj,jk,jpnch) = tra(ji,jj,jk,jpnch) - zgrazp(ji,jj,jk) & & * trn(ji,jj,jk,jpnch)/(trn(ji,jj,jk,jpphy)+rtrn) tra(ji,jj,jk,jpdch) = tra(ji,jj,jk,jpdch) - zgrazsd(ji,jj,jk) & & * trn(ji,jj,jk,jpdch)/(trn(ji,jj,jk,jpdia)+rtrn) tra(ji,jj,jk,jpbsi) = tra(ji,jj,jk,jpbsi) - zgrazsd(ji,jj,jk) & & * trn(ji,jj,jk,jpbsi)/(trn(ji,jj,jk,jpdia)+rtrn) tra(ji,jj,jk,jpdsi) = tra(ji,jj,jk,jpdsi) + zgrazsd(ji,jj,jk) & & * trn(ji,jj,jk,jpbsi)/(trn(ji,jj,jk,jpdia)+rtrn) tra(ji,jj,jk,jpnfe) = tra(ji,jj,jk,jpnfe) - zgrazpf(ji,jj,jk) tra(ji,jj,jk,jpdfe) = tra(ji,jj,jk,jpdfe) - zgrazsf(ji,jj,jk) tra(ji,jj,jk,jppoc) = tra(ji,jj,jk,jppoc) + zmortz - zgrazm(ji,jj,jk) tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + ferat3 * zmortz & & + unass * ( zgrazpf(ji,jj,jk) + zgrazsf (ji,jj,jk)) & & - (1.-unass) * zgrazmf(ji,jj,jk) zprcaca = xfracal(ji,jj,jk) * unass * zgrazp(ji,jj,jk) #if defined key_trc_dia3d prodcal(ji,jj,jk) = prodcal(ji,jj,jk) + zprcaca ! prodcal=prodcal(nanophy)+prodcal(microzoo)+prodcal(mesozoo) #endif zprcaca = part * 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 tra(ji,jj,jk,jpnum) = tra(ji,jj,jk,jpnum) + ( zmortz - zgrazm(ji,jj,jk) ) * xkr_ddiat #endif END DO END DO END DO ! IF(ln_ctl) THEN ! print mean trends (used for debugging) WRITE(charout, FMT="('micro')") CALL prt_ctl_trc_info(charout) CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) ENDIF END SUBROUTINE p4z_micro SUBROUTINE p4z_micro_init !!---------------------------------------------------------------------- !! *** ROUTINE p4z_micro_init *** !! !! ** Purpose : Initialization of microzooplankton parameters !! !! ** Method : Read the nampiszoo namelist and check the parameters !! called at the first timestep (nittrc000) !! !! ** input : Namelist nampiszoo !! !!---------------------------------------------------------------------- NAMELIST/nampiszoo/ grazrat,resrat,mzrat,xpref2c, xpref2p, & & xpref2d, xkgraz, epsher, sigma1, unass REWIND( numnat ) ! read numnat READ ( numnat, nampiszoo ) IF(lwp) THEN ! control print WRITE(numout,*) ' ' WRITE(numout,*) ' Namelist parameters for microzooplankton, nampiszoo' WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' WRITE(numout,*) ' zoo preference for POC xpref2c =', xpref2c WRITE(numout,*) ' zoo preference for nano xpref2p =', xpref2p WRITE(numout,*) ' zoo preference for diatoms xpref2d =', xpref2d WRITE(numout,*) ' exsudation rate of microzooplankton resrat =', resrat WRITE(numout,*) ' microzooplankton mortality rate mzrat =', mzrat WRITE(numout,*) ' maximal microzoo grazing rate grazrat =', grazrat WRITE(numout,*) ' non assimilated fraction of P by microzoo unass =', unass WRITE(numout,*) ' Efficicency of microzoo growth epsher =', epsher WRITE(numout,*) ' Fraction of microzoo excretion as DOM sigma1 =', sigma1 WRITE(numout,*) ' half sturation constant for grazing 1 xkgraz =', xkgraz ENDIF END SUBROUTINE p4z_micro_init #else !!====================================================================== !! Dummy module : No PISCES bio-model !!====================================================================== CONTAINS SUBROUTINE p4z_micro ! Empty routine END SUBROUTINE p4z_micro #endif !!====================================================================== END MODULE p4zmicro