MODULE p4zsink !!====================================================================== !! *** MODULE p4zsink *** !! TOP : PISCES vertical flux of particulate matter due to gravitational sinking !!====================================================================== !! History : 1.0 ! 2004 (O. Aumont) Original code !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Change aggregation formula !! 3.5 ! 2012-07 (O. Aumont) Introduce potential time-splitting !!---------------------------------------------------------------------- !! p4z_sink : Compute vertical flux of particulate matter due to gravitational sinking !! p4z_sink_init : Unitialisation of sinking speed parameters !! p4z_sink_alloc : Allocate sinking speed variables !!---------------------------------------------------------------------- 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 trcsink ! General routine to compute sedimentation USE prtctl_trc ! print control for debugging USE iom ! I/O manager USE lib_mpp IMPLICIT NONE PRIVATE PUBLIC p4z_sink ! called in p4zbio.F90 PUBLIC p4z_sink_init ! called in trcsms_pisces.F90 PUBLIC p4z_sink_alloc REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinking, sinking2 !: POC sinking fluxes ! ! (different meanings depending on the parameterization) REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkingn, sinking2n !: POC sinking fluxes REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkingp, sinking2p !: POC sinking fluxes REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkcal, sinksil !: CaCO3 and BSi sinking fluxes REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkfer !: Small BFe sinking fluxes REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkfer2 !: Big iron sinking fluxes INTEGER :: ik100 !! * Substitutions # include "do_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/TOP 4.0 , NEMO Consortium (2018) !! $Id$ !! Software governed by the CeCILL license (see ./LICENSE) !!---------------------------------------------------------------------- CONTAINS !!---------------------------------------------------------------------- !! 'standard sinking parameterisation' ??? !!---------------------------------------------------------------------- SUBROUTINE p4z_sink ( kt, knt, Kbb, Kmm, Krhs ) !!--------------------------------------------------------------------- !! *** ROUTINE p4z_sink *** !! !! ** Purpose : Compute vertical flux of particulate matter due to !! gravitational sinking !! !! ** Method : - ??? !!--------------------------------------------------------------------- INTEGER, INTENT(in) :: kt, knt INTEGER, INTENT(in) :: Kbb, Kmm, Krhs ! time level indices INTEGER :: ji, jj, jk CHARACTER (len=25) :: charout REAL(wp) :: zmax, zfact !!--------------------------------------------------------------------- ! IF( ln_timing ) CALL timing_start('p4z_sink') ! Initialization of some global variables ! --------------------------------------- prodpoc(:,:,:) = 0. conspoc(:,:,:) = 0. prodgoc(:,:,:) = 0. consgoc(:,:,:) = 0. ! ! Sinking speeds of detritus is increased with depth as shown ! by data and from the coagulation theory ! ----------------------------------------------------------- DO_3D_11_11( 1, jpkm1 ) zmax = MAX( heup_01(ji,jj), hmld(ji,jj) ) zfact = MAX( 0., gdepw(ji,jj,jk+1,Kmm) - zmax ) / wsbio2scale wsbio4(ji,jj,jk) = wsbio2 + MAX(0., ( wsbio2max - wsbio2 )) * zfact END_3D ! limit the values of the sinking speeds to avoid numerical instabilities wsbio3(:,:,:) = wsbio ! ! Initializa to zero all the sinking arrays ! ----------------------------------------- sinking (:,:,:) = 0.e0 sinking2(:,:,:) = 0.e0 sinkcal (:,:,:) = 0.e0 sinkfer (:,:,:) = 0.e0 sinksil (:,:,:) = 0.e0 sinkfer2(:,:,:) = 0.e0 ! Compute the sedimentation term using p4zsink2 for all the sinking particles ! ----------------------------------------------------- CALL trc_sink( kt, Kbb, Kmm, wsbio3, sinking , jppoc, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio3, sinkfer , jpsfe, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio4, sinking2, jpgoc, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio4, sinkfer2, jpbfe, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio4, sinksil , jpgsi, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio4, sinkcal , jpcal, rfact2 ) IF( ln_p5z ) THEN sinkingn (:,:,:) = 0.e0 sinking2n(:,:,:) = 0.e0 sinkingp (:,:,:) = 0.e0 sinking2p(:,:,:) = 0.e0 ! Compute the sedimentation term using p4zsink2 for all the sinking particles ! ----------------------------------------------------- CALL trc_sink( kt, Kbb, Kmm, wsbio3, sinkingn , jppon, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio3, sinkingp , jppop, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio4, sinking2n, jpgon, rfact2 ) CALL trc_sink( kt, Kbb, Kmm, wsbio4, sinking2p, jpgop, rfact2 ) ENDIF ! Total carbon export per year IF( iom_use( "tcexp" ) .OR. ( ln_check_mass .AND. kt == nitend .AND. knt == nrdttrc ) ) & & t_oce_co2_exp = glob_sum( 'p4zsink', ( sinking(:,:,ik100) + sinking2(:,:,ik100) ) * e1e2t(:,:) * tmask(:,:,1) ) ! IF( lk_iomput .AND. knt == nrdttrc ) THEN zfact = 1.e+3 * rfact2r ! conversion from mol/l/kt to mol/m3/s ! CALL iom_put( "EPC100" , ( sinking(:,:,ik100) + sinking2(:,:,ik100) ) * zfact * tmask(:,:,1) ) ! Export of carbon at 100m CALL iom_put( "EPFE100" , ( sinkfer(:,:,ik100) + sinkfer2(:,:,ik100) ) * zfact * tmask(:,:,1) ) ! Export of iron at 100m CALL iom_put( "EPCAL100", sinkcal(:,:,ik100) * zfact * tmask(:,:,1) ) ! Export of calcite at 100m CALL iom_put( "EPSI100" , sinksil(:,:,ik100) * zfact * tmask(:,:,1) ) ! Export of bigenic silica at 100m CALL iom_put( "EXPC" , ( sinking(:,:,:) + sinking2(:,:,:) ) * zfact * tmask(:,:,:) ) ! Export of carbon in the water column CALL iom_put( "EXPFE" , ( sinkfer(:,:,:) + sinkfer2(:,:,:) ) * zfact * tmask(:,:,:) ) ! Export of iron CALL iom_put( "EXPCAL" , sinkcal(:,:,:) * zfact * tmask(:,:,:) ) ! Export of calcite CALL iom_put( "EXPSI" , sinksil(:,:,:) * zfact * tmask(:,:,:) ) ! Export of bigenic silica CALL iom_put( "tcexp" , t_oce_co2_exp * zfact ) ! molC/s ! ENDIF ! IF(sn_cfctl%l_prttrc) THEN ! print mean trends (used for debugging) WRITE(charout, FMT="('sink')") CALL prt_ctl_trc_info(charout) CALL prt_ctl_trc(tab4d=tr(:,:,:,:,Krhs), mask=tmask, clinfo=ctrcnm) ENDIF ! IF( ln_timing ) CALL timing_stop('p4z_sink') ! END SUBROUTINE p4z_sink SUBROUTINE p4z_sink_init !!---------------------------------------------------------------------- !! *** ROUTINE p4z_sink_init *** !!---------------------------------------------------------------------- INTEGER :: jk !!---------------------------------------------------------------------- ! ik100 = 10 ! last level where depth less than 100 m DO jk = jpkm1, 1, -1 IF( gdept_1d(jk) > 100. ) ik100 = jk - 1 END DO IF (lwp) WRITE(numout,*) IF (lwp) WRITE(numout,*) ' Level corresponding to 100m depth ', ik100 + 1 IF (lwp) WRITE(numout,*) ! t_oce_co2_exp = 0._wp ! END SUBROUTINE p4z_sink_init INTEGER FUNCTION p4z_sink_alloc() !!---------------------------------------------------------------------- !! *** ROUTINE p4z_sink_alloc *** !!---------------------------------------------------------------------- INTEGER :: ierr(2) !!---------------------------------------------------------------------- ! ierr(:) = 0 ! ALLOCATE( sinking(jpi,jpj,jpk) , sinking2(jpi,jpj,jpk) , & & sinkcal(jpi,jpj,jpk) , sinksil (jpi,jpj,jpk) , & & sinkfer2(jpi,jpj,jpk) , & & sinkfer(jpi,jpj,jpk) , STAT=ierr(1) ) ! IF( ln_p5z ) ALLOCATE( sinkingn(jpi,jpj,jpk), sinking2n(jpi,jpj,jpk) , & & sinkingp(jpi,jpj,jpk), sinking2p(jpi,jpj,jpk) , STAT=ierr(2) ) ! p4z_sink_alloc = MAXVAL( ierr ) IF( p4z_sink_alloc /= 0 ) CALL ctl_stop( 'STOP', 'p4z_sink_alloc : failed to allocate arrays.' ) ! END FUNCTION p4z_sink_alloc !!====================================================================== END MODULE p4zsink