MODULE p4zlys !!====================================================================== !! *** MODULE p4zlys *** !! TOP : PISCES !!====================================================================== !! History : - ! 1988-07 (E. MAIER-REIMER) Original code !! - ! 1998 (O. Aumont) additions !! - ! 1999 (C. Le Quere) modifications !! 1.0 ! 2004 (O. Aumont) modifications !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 !! ! 2011-02 (J. Simeon, J. Orr) Calcon salinity dependence !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Improvment of calcite dissolution !!---------------------------------------------------------------------- #if defined key_pisces !!---------------------------------------------------------------------- !! 'key_pisces' PISCES bio-model !!---------------------------------------------------------------------- !! p4z_lys : Compute the CaCO3 dissolution !! p4z_lys_init : Read the namelist parameters !!---------------------------------------------------------------------- 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_trc ! print control for debugging USE iom ! I/O manager IMPLICIT NONE PRIVATE PUBLIC p4z_lys ! called in trcsms_pisces.F90 PUBLIC p4z_lys_init ! called in trcsms_pisces.F90 !! * Shared module variables REAL(wp), PUBLIC :: kdca !: diss. rate constant calcite REAL(wp), PUBLIC :: nca !: order of reaction for calcite dissolution !! * Module variables REAL(wp) :: calcon = 1.03E-2 !: mean calcite concentration [Ca2+] in sea water [mole/kg solution] INTEGER :: rmtss !: number of seconds per month !!---------------------------------------------------------------------- !! NEMO/TOP 3.3 , NEMO Consortium (2010) !! $Id$ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE p4z_lys( kt, knt ) !!--------------------------------------------------------------------- !! *** ROUTINE p4z_lys *** !! !! ** Purpose : CALCULATES DEGREE OF CACO3 SATURATION IN THE WATER !! COLUMN, DISSOLUTION/PRECIPITATION OF CACO3 AND LOSS !! OF CACO3 TO THE CACO3 SEDIMENT POOL. !! !! ** Method : - ??? !!--------------------------------------------------------------------- ! INTEGER, INTENT(in) :: kt, knt ! ocean time step INTEGER :: ji, jj, jk, jn REAL(wp) :: zalk, zdic, zph, zah2 REAL(wp) :: zdispot, zfact, zcalcon, zalka, zaldi REAL(wp) :: zomegaca, zexcess, zexcess0 CHARACTER (len=25) :: charout REAL(wp), POINTER, DIMENSION(:,:,:) :: zco3, zcaldiss !!--------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('p4z_lys') ! CALL wrk_alloc( jpi, jpj, jpk, zco3, zcaldiss ) ! zco3 (:,:,:) = 0. zcaldiss(:,:,:) = 0. ! ------------------------------------------- ! COMPUTE [CO3--] and [H+] CONCENTRATIONS ! ------------------------------------------- DO jn = 1, 5 ! BEGIN OF ITERATION ! !CDIR NOVERRCHK DO jk = 1, jpkm1 !CDIR NOVERRCHK DO jj = 1, jpj !CDIR NOVERRCHK DO ji = 1, jpi zfact = rhop(ji,jj,jk) / 1000. + rtrn zph = hi(ji,jj,jk) * tmask(ji,jj,jk) / zfact + ( 1.-tmask(ji,jj,jk) ) * 1.e-9 ! [H+] zdic = trb(ji,jj,jk,jpdic) / zfact zalka = trb(ji,jj,jk,jptal) / zfact ! CALCULATE [ALK]([CO3--], [HCO3-]) zalk = zalka - ( akw3(ji,jj,jk) / zph - zph / ( aphscale(ji,jj,jk) + rtrn ) & & + borat(ji,jj,jk) / ( 1. + zph / akb3(ji,jj,jk) ) ) ! CALCULATE [H+] and [CO3--] zaldi = zdic - zalk zah2 = SQRT( zaldi * zaldi + 4.* ( zalk * ak23(ji,jj,jk) / ak13(ji,jj,jk) ) * ( zdic + zaldi ) ) zah2 = 0.5 * ak13(ji,jj,jk) / zalk * ( zaldi + zah2 ) ! zco3(ji,jj,jk) = zalk / ( 2. + zah2 / ak23(ji,jj,jk) ) * zfact hi(ji,jj,jk) = zah2 * zfact END DO END DO END DO ! END DO ! --------------------------------------------------------- ! CALCULATE DEGREE OF CACO3 SATURATION AND CORRESPONDING ! DISSOLOUTION AND PRECIPITATION OF CACO3 (BE AWARE OF ! MGCO3) ! --------------------------------------------------------- DO jk = 1, jpkm1 DO jj = 1, jpj DO ji = 1, jpi ! DEVIATION OF [CO3--] FROM SATURATION VALUE ! Salinity dependance in zomegaca and divide by rhop/1000 to have good units zcalcon = calcon * ( tsn(ji,jj,jk,jp_sal) / 35._wp ) zfact = rhop(ji,jj,jk) / 1000._wp zomegaca = ( zcalcon * zco3(ji,jj,jk) * zfact ) / aksp(ji,jj,jk) ! SET DEGREE OF UNDER-/SUPERSATURATION excess(ji,jj,jk) = 1._wp - zomegaca zexcess0 = MAX( 0., excess(ji,jj,jk) ) zexcess = zexcess0**nca ! AMOUNT CACO3 (12C) THAT RE-ENTERS SOLUTION ! (ACCORDING TO THIS FORMULATION ALSO SOME PARTICULATE ! CACO3 GETS DISSOLVED EVEN IN THE CASE OF OVERSATURATION) zdispot = kdca * zexcess * trb(ji,jj,jk,jpcal) # if defined key_degrad zdispot = zdispot * facvol(ji,jj,jk) # endif ! CHANGE OF [CO3--] , [ALK], PARTICULATE [CACO3], ! AND [SUM(CO2)] DUE TO CACO3 DISSOLUTION/PRECIPITATION zcaldiss(ji,jj,jk) = zdispot * rfact2 / rmtss ! calcite dissolution zco3(ji,jj,jk) = zco3(ji,jj,jk) + zcaldiss(ji,jj,jk) ! tra(ji,jj,jk,jptal) = tra(ji,jj,jk,jptal) + 2. * zcaldiss(ji,jj,jk) tra(ji,jj,jk,jpcal) = tra(ji,jj,jk,jpcal) - zcaldiss(ji,jj,jk) tra(ji,jj,jk,jpdic) = tra(ji,jj,jk,jpdic) + zcaldiss(ji,jj,jk) END DO END DO END DO ! IF( lk_iomput .AND. knt == nrdttrc ) THEN IF( iom_use( "PH" ) ) CALL iom_put( "PH" , -1. * LOG10( hi(:,:,:) ) * tmask(:,:,:) ) IF( iom_use( "CO3" ) ) CALL iom_put( "CO3" , zco3(:,:,:) * 1.e+3 * tmask(:,:,:) ) IF( iom_use( "CO3sat" ) ) CALL iom_put( "CO3sat", aksp(:,:,:) * 1.e+3 / calcon * tmask(:,:,:) ) IF( iom_use( "DCAL" ) ) CALL iom_put( "DCAL" , zcaldiss(:,:,:) * 1.e+3 * rfact2r * tmask(:,:,:) ) ELSE IF( ln_diatrc ) THEN trc3d(:,:,:,jp_pcs0_3d ) = -1. * LOG10( hi(:,:,:) ) * tmask(:,:,:) trc3d(:,:,:,jp_pcs0_3d + 1) = zco3(:,:,:) * tmask(:,:,:) trc3d(:,:,:,jp_pcs0_3d + 2) = aksp(:,:,:) / calcon * tmask(:,:,:) ENDIF ENDIF ! IF(ln_ctl) THEN ! print mean trends (used for debugging) WRITE(charout, FMT="('lys ')") CALL prt_ctl_trc_info(charout) CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) ENDIF ! CALL wrk_dealloc( jpi, jpj, jpk, zco3, zcaldiss ) ! IF( nn_timing == 1 ) CALL timing_stop('p4z_lys') ! END SUBROUTINE p4z_lys SUBROUTINE p4z_lys_init !!---------------------------------------------------------------------- !! *** ROUTINE p4z_lys_init *** !! !! ** Purpose : Initialization of CaCO3 dissolution parameters !! !! ** Method : Read the nampiscal namelist and check the parameters !! called at the first timestep (nittrc000) !! !! ** input : Namelist nampiscal !! !!---------------------------------------------------------------------- INTEGER :: ji, jj, jk INTEGER :: ios ! Local integer output status for namelist read REAL(wp) :: zcaralk, zbicarb, zco3 REAL(wp) :: ztmas, ztmas1 NAMELIST/nampiscal/ kdca, nca !!---------------------------------------------------------------------- REWIND( numnatp_ref ) ! Namelist nampiscal in reference namelist : Pisces CaCO3 dissolution READ ( numnatp_ref, nampiscal, IOSTAT = ios, ERR = 901) 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampiscal in reference namelist', lwp ) REWIND( numnatp_cfg ) ! Namelist nampiscal in configuration namelist : Pisces CaCO3 dissolution READ ( numnatp_cfg, nampiscal, IOSTAT = ios, ERR = 902 ) 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampiscal in configuration namelist', lwp ) IF(lwm) WRITE ( numonp, nampiscal ) IF(lwp) THEN ! control print WRITE(numout,*) ' ' WRITE(numout,*) ' Namelist parameters for CaCO3 dissolution, nampiscal' WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' WRITE(numout,*) ' diss. rate constant calcite (per month) kdca =', kdca WRITE(numout,*) ' order of reaction for calcite dissolution nca =', nca ENDIF ! Number of seconds per month rmtss = nyear_len(1) * rday / raamo ! END SUBROUTINE p4z_lys_init #else !!====================================================================== !! Dummy module : No PISCES bio-model !!====================================================================== CONTAINS SUBROUTINE p4z_lys( kt ) ! Empty routine INTEGER, INTENT( in ) :: kt WRITE(*,*) 'p4z_lys: You should not have seen this print! error?', kt END SUBROUTINE p4z_lys #endif !!====================================================================== END MODULE p4zlys