MODULE p4zligand
!!======================================================================
!! *** MODULE p4zligand ***
!! TOP : PISCES Compute remineralization/dissolution of organic ligands
!!=========================================================================
!! History : 3.6 ! 2016-03 (O. Aumont, A. Tagliabue) Quota model and reorganization
!!----------------------------------------------------------------------
!! p4z_ligand : Compute remineralization/dissolution of organic ligands
!! p4z_ligand_init: Initialisation of parameters for remineralisation
!!----------------------------------------------------------------------
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 prtctl ! print control for debugging
USE iom ! I/O manager
IMPLICIT NONE
PRIVATE
PUBLIC p4z_ligand ! called in p4zbio.F90
PUBLIC p4z_ligand_init ! called in trcsms_pisces.F90
REAL(wp), PUBLIC :: rlgw !: lifetime (years) of weak ligands
REAL(wp), PUBLIC :: rlgs !: lifetime (years) of strong ligands
REAL(wp), PUBLIC :: rlig !: Remin ligand production
REAL(wp), PUBLIC :: prlgw !: Photochemical of weak ligand
REAL(wp), PUBLIC :: xklig !: 1/2 saturation constant of photolysis
!! * Substitutions
# include "do_loop_substitute.h90"
!!----------------------------------------------------------------------
!! NEMO/TOP 4.0 , NEMO Consortium (2018)
!! $Id: p4zligand.F90 15459 2021-10-29 08:19:18Z cetlod $
!! Software governed by the CeCILL license (see ./LICENSE)
!!----------------------------------------------------------------------
CONTAINS
SUBROUTINE p4z_ligand( kt, knt, Kbb, Krhs )
!!---------------------------------------------------------------------
!! *** ROUTINE p4z_ligand ***
!!
!! ** Purpose : Compute remineralization/scavenging of organic ligands
!!---------------------------------------------------------------------
INTEGER, INTENT(in) :: kt, knt ! ocean time step
INTEGER, INTENT(in) :: Kbb, Krhs ! time level indices
!
INTEGER :: ji, jj, jk
REAL(wp) :: zlgwp, zlgwpr, zlgwr, zlablgw
REAL(wp) :: zlam1a, zlam1b, zaggliga, zligco
REAL(wp), DIMENSION(jpi,jpj,jpk) :: zligrem, zligpr, zligprod, zlcoll3d
CHARACTER (len=25) :: charout
!!---------------------------------------------------------------------
!
IF( ln_timing ) CALL timing_start('p4z_ligand')
!
DO_3D( nn_hls, nn_hls, nn_hls, nn_hls, 1, jpkm1)
!
! ------------------------------------------------------------------
! Remineralization of iron ligands
! ------------------------------------------------------------------
! production from remineralisation of organic matter
zlgwp = orem(ji,jj,jk) * rlig
! decay of weak ligand
! This is based on the idea that as LGW is lower
! there is a larger fraction of refractory OM
zlgwr = ( 1.0 / rlgs * MAX(0., tr(ji,jj,jk,jplgw,Kbb) - xfecolagg(ji,jj,jk) * 1.0E-9 ) &
& + 1.0 / rlgw * xfecolagg(ji,jj,jk) * 1.0E-9 ) / ( rtrn + tr(ji,jj,jk,jplgw,Kbb) )
zlgwr = zlgwr * tgfunc(ji,jj,jk) * ( xstep / nyear_len(1) ) * blim(ji,jj,jk) * tr(ji,jj,jk,jplgw,Kbb)
! photochem loss of weak ligand
zlgwpr = prlgw * xstep * etot(ji,jj,jk) * tr(ji,jj,jk,jplgw,Kbb)**3 * (1. - fr_i(ji,jj)) &
& / ( tr(ji,jj,jk,jplgw,Kbb)**2 + (xklig)**2)
! Coagulation of ligands due to various processes (Brownian, shear, diff. sedimentation
! xcoagfe is computed in p4zfechem
! -------------------------------------------------------------------------------------
! 50% of the ligands are supposed to be in the colloidal size fraction
! as for FeL
zligco = 0.5 * MAX(0., tr(ji,jj,jk,jplgw,Kbb) - xfecolagg(ji,jj,jk) * 1.0E-9 )
zaggliga = xcoagfe(ji,jj,jk) * xstep * zligco
tr(ji,jj,jk,jplgw,Krhs) = tr(ji,jj,jk,jplgw,Krhs) + zlgwp - zlgwr - zlgwpr - zaggliga
!
zligrem(ji,jj,jk) = zlgwr
zligpr(ji,jj,jk) = zlgwpr
zligprod(ji,jj,jk) = zlgwp
zlcoll3d(ji,jj,jk) = zaggliga
END_3D
!
! Output of some diagnostics variables
! ---------------------------------
IF( lk_iomput .AND. knt == nrdttrc ) THEN
IF( iom_use( "LIGREM" ) ) THEN
zligrem(:,:,jpk) = 0. ; CALL iom_put( "LIGREM", zligrem(:,:,:) * 1e9 * 1.e+3 * rfact2r * tmask(:,:,:) )
ENDIF
IF( iom_use( "LIGPR" ) ) THEN
zligpr(:,:,jpk) = 0. ; CALL iom_put( "LIGPR" , zligpr(:,:,:) * 1e9 * 1.e+3 * rfact2r * tmask(:,:,:) )
ENDIF
IF( iom_use( "LPRODR" ) ) THEN
zligprod(:,:,jpk) = 0. ; CALL iom_put( "LPRODR", zligprod(:,:,:) * 1e9 * 1.e+3 * rfact2r * tmask(:,:,:) )
ENDIF
IF( iom_use( "LGWCOLL" ) ) THEN
zlcoll3d(:,:,jpk) = 0. ; CALL iom_put( "LGWCOLL", zlcoll3d(:,:,:) * 1.e9 * 1.e+3 * rfact2r * tmask(:,:,:) )
ENDIF
ENDIF
!
IF(sn_cfctl%l_prttrc) THEN ! print mean trends (used for debugging)
WRITE(charout, FMT="('ligand1')")
CALL prt_ctl_info( charout, cdcomp = 'top' )
CALL prt_ctl(tab4d_1=tr(:,:,:,:,Krhs), mask1=tmask, clinfo=ctrcnm)
ENDIF
!
IF( ln_timing ) CALL timing_stop('p4z_ligand')
!
END SUBROUTINE p4z_ligand
SUBROUTINE p4z_ligand_init
!!----------------------------------------------------------------------
!! *** ROUTINE p4z_ligand_init ***
!!
!! ** Purpose : Initialization of remineralization parameters
!!
!! ** Method : Read the nampislig namelist and check the parameters
!!
!! ** input : Namelist nampislig
!!----------------------------------------------------------------------
INTEGER :: ios ! Local integer
!
NAMELIST/nampislig/ rlgw, prlgw, rlgs, rlig, xklig
!!----------------------------------------------------------------------
!
IF(lwp) THEN
WRITE(numout,*)
WRITE(numout,*) 'p4z_ligand_init : remineralization/scavenging of organic ligands'
WRITE(numout,*) '~~~~~~~~~~~~~~~'
ENDIF
READ ( numnatp_ref, nampislig, IOSTAT = ios, ERR = 901)
901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampislig in reference namelist' )
READ ( numnatp_cfg, nampislig, IOSTAT = ios, ERR = 902 )
902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nampislig in configuration namelist' )
IF(lwm) WRITE ( numonp, nampislig )
!
IF(lwp) THEN ! control print
WRITE(numout,*) ' Namelist : nampislig'
WRITE(numout,*) ' Lifetime (years) of weak ligands rlgw =', rlgw
WRITE(numout,*) ' Remin ligand production per unit C rlig =', rlig
WRITE(numout,*) ' Photolysis of weak ligand prlgw =', prlgw
WRITE(numout,*) ' Lifetime (years) of strong ligands rlgs =', rlgs
WRITE(numout,*) ' 1/2 saturation for photolysis xklig =', xklig
ENDIF
!
END SUBROUTINE p4z_ligand_init
!!======================================================================
END MODULE p4zligand