MODULE p4zopt !!====================================================================== !! *** MODULE p4zopt *** !! TOP - PISCES : Compute the light availability in the water column !!====================================================================== !! History : 1.0 ! 2004 (O. Aumont) Original code !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 !! 3.2 ! 2009-04 (C. Ethe, G. Madec) optimisation !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Improve light availability of nano & diat !!---------------------------------------------------------------------- #if defined key_pisces !!---------------------------------------------------------------------- !! 'key_pisces' PISCES bio-model !!---------------------------------------------------------------------- !! p4z_opt : light availability in the water column !!---------------------------------------------------------------------- USE trc ! tracer variables USE oce_trc ! tracer-ocean share variables USE sms_pisces ! Source Minus Sink of PISCES USE iom ! I/O manager IMPLICIT NONE PRIVATE PUBLIC p4z_opt ! called in p4zbio.F90 module PUBLIC p4z_opt_init ! called in trcsms_pisces.F90 module PUBLIC p4z_opt_alloc REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: etot, enano, ediat !: PAR for phyto, nano and diat REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: emoy !: averaged PAR in the mixed layer INTEGER :: nksrp ! levels below which the light cannot penetrate ( depth larger than 391 m) REAL(wp) :: parlux = 0.43_wp / 3._wp REAL(wp), DIMENSION(3,61), PUBLIC :: xkrgb !: tabulated attenuation coefficients for RGB absorption !!* 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_opt( kt, jnt ) !!--------------------------------------------------------------------- !! *** ROUTINE p4z_opt *** !! !! ** Purpose : Compute the light availability in the water column !! depending on the depth and the chlorophyll concentration !! !! ** Method : - ??? !!--------------------------------------------------------------------- ! INTEGER, INTENT(in) :: kt, jnt ! ocean time step ! INTEGER :: ji, jj, jk INTEGER :: irgb REAL(wp) :: zchl, zxsi0r REAL(wp) :: zc0 , zc1 , zc2, zc3, z1_dep REAL(wp), POINTER, DIMENSION(:,: ) :: zdepmoy, zetmp, zetmp1, zetmp2 REAL(wp), POINTER, DIMENSION(:,:,:) :: zekg, zekr, zekb, ze0, ze1, ze2, ze3 !!--------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('p4z_opt') ! ! Allocate temporary workspace CALL wrk_alloc( jpi, jpj, zdepmoy, zetmp, zetmp1, zetmp2 ) CALL wrk_alloc( jpi, jpj, jpk, zekg, zekr, zekb, ze0, ze1, ze2, ze3 ) ! Initialisation of variables used to compute PAR ! ----------------------------------------------- ze1 (:,:,jpk) = 0._wp ze2 (:,:,jpk) = 0._wp ze3 (:,:,jpk) = 0._wp ! !* attenuation coef. function of Chlorophyll and wavelength (Red-Green-Blue) DO jk = 1, jpkm1 ! -------------------------------------------------------- !CDIR NOVERRCHK DO jj = 1, jpj !CDIR NOVERRCHK DO ji = 1, jpi zchl = ( trn(ji,jj,jk,jpnch) + trn(ji,jj,jk,jpdch) + rtrn ) * 1.e6 zchl = MIN( 10. , MAX( 0.05, zchl ) ) irgb = NINT( 41 + 20.* LOG10( zchl ) + rtrn ) ! zekb(ji,jj,jk) = xkrgb(1,irgb) * fse3t(ji,jj,jk) zekg(ji,jj,jk) = xkrgb(2,irgb) * fse3t(ji,jj,jk) zekr(ji,jj,jk) = xkrgb(3,irgb) * fse3t(ji,jj,jk) END DO END DO END DO ! !* Photosynthetically Available Radiation (PAR) ! ! -------------------------------------- !CDIR NOVERRCHK DO jj = 1, jpj !CDIR NOVERRCHK DO ji = 1, jpi zc1 = parlux * qsr(ji,jj) * EXP( -0.5 * zekb(ji,jj,1) ) zc2 = parlux * qsr(ji,jj) * EXP( -0.5 * zekg(ji,jj,1) ) zc3 = parlux * qsr(ji,jj) * EXP( -0.5 * zekr(ji,jj,1) ) ze1 (ji,jj,1) = zc1 ze2 (ji,jj,1) = zc2 ze3 (ji,jj,1) = zc3 etot (ji,jj,1) = ( zc1 + zc2 + zc3 ) enano(ji,jj,1) = ( 2.1 * zc1 + 0.42 * zc2 + 0.4 * zc3 ) ediat(ji,jj,1) = ( 1.6 * zc1 + 0.69 * zc2 + 0.7 * zc3 ) END DO END DO DO jk = 2, nksrp !CDIR NOVERRCHK DO jj = 1, jpj !CDIR NOVERRCHK DO ji = 1, jpi zc1 = ze1(ji,jj,jk-1) * EXP( -0.5 * ( zekb(ji,jj,jk-1) + zekb(ji,jj,jk) ) ) zc2 = ze2(ji,jj,jk-1) * EXP( -0.5 * ( zekg(ji,jj,jk-1) + zekg(ji,jj,jk) ) ) zc3 = ze3(ji,jj,jk-1) * EXP( -0.5 * ( zekr(ji,jj,jk-1) + zekr(ji,jj,jk) ) ) ze1 (ji,jj,jk) = zc1 ze2 (ji,jj,jk) = zc2 ze3 (ji,jj,jk) = zc3 etot (ji,jj,jk) = ( zc1 + zc2 + zc3 ) enano(ji,jj,jk) = ( 2.1 * zc1 + 0.42 * zc2 + 0.4 * zc3 ) ediat(ji,jj,jk) = ( 1.6 * zc1 + 0.69 * zc2 + 0.7 * zc3 ) END DO END DO END DO IF( ln_qsr_bio ) THEN !* heat flux accros w-level (used in the dynamics) ! ! ------------------------ zxsi0r = 1.e0 / rn_si0 ! ze0 (:,:,1) = rn_abs * qsr(:,:) ze1 (:,:,1) = parlux * qsr(:,:) ! surface value : separation in R-G-B + near surface ze2 (:,:,1) = parlux * qsr(:,:) ze3 (:,:,1) = parlux * qsr(:,:) etot3(:,:,1) = qsr(:,:) * tmask(:,:,1) ! DO jk = 2, nksrp + 1 !CDIR NOVERRCHK DO jj = 1, jpj !CDIR NOVERRCHK DO ji = 1, jpi zc0 = ze0(ji,jj,jk-1) * EXP( -fse3t(ji,jj,jk-1) * zxsi0r ) zc1 = ze1(ji,jj,jk-1) * EXP( -zekb(ji,jj,jk-1 ) ) zc2 = ze2(ji,jj,jk-1) * EXP( -zekg(ji,jj,jk-1 ) ) zc3 = ze3(ji,jj,jk-1) * EXP( -zekr(ji,jj,jk-1 ) ) ze0(ji,jj,jk) = zc0 ze1(ji,jj,jk) = zc1 ze2(ji,jj,jk) = zc2 ze3(ji,jj,jk) = zc3 etot3(ji,jj,jk) = ( zc0 + zc1 + zc2 + zc3 ) * tmask(ji,jj,jk) END DO ! END DO ! END DO ! ENDIF ! !* Euphotic depth and level neln(:,:) = 1 ! ------------------------ heup(:,:) = 300. DO jk = 2, nksrp DO jj = 1, jpj DO ji = 1, jpi IF( etot(ji,jj,jk) >= 0.0043 * qsr(ji,jj) ) THEN neln(ji,jj) = jk+1 ! Euphotic level : 1rst T-level strictly below Euphotic layer ! ! nb: ensure the compatibility with nmld_trc definition in trd_mld_trc_zint heup(ji,jj) = fsdepw(ji,jj,jk+1) ! Euphotic layer depth ENDIF END DO END DO END DO heup(:,:) = MIN( 300., heup(:,:) ) ! !* mean light over the mixed layer zdepmoy(:,:) = 0.e0 ! ------------------------------- zetmp (:,:) = 0.e0 zetmp1 (:,:) = 0.e0 zetmp2 (:,:) = 0.e0 DO jk = 1, nksrp !CDIR NOVERRCHK DO jj = 1, jpj !CDIR NOVERRCHK DO ji = 1, jpi IF( fsdepw(ji,jj,jk+1) <= hmld(ji,jj) ) THEN zetmp (ji,jj) = zetmp (ji,jj) + etot (ji,jj,jk) * fse3t(ji,jj,jk) zetmp1 (ji,jj) = zetmp1 (ji,jj) + enano(ji,jj,jk) * fse3t(ji,jj,jk) zetmp2 (ji,jj) = zetmp2 (ji,jj) + ediat(ji,jj,jk) * fse3t(ji,jj,jk) zdepmoy(ji,jj) = zdepmoy(ji,jj) + fse3t(ji,jj,jk) ENDIF END DO END DO END DO ! emoy(:,:,:) = etot(:,:,:) ! DO jk = 1, nksrp !CDIR NOVERRCHK DO jj = 1, jpj !CDIR NOVERRCHK DO ji = 1, jpi IF( fsdepw(ji,jj,jk+1) <= hmld(ji,jj) ) THEN z1_dep = 1. / ( zdepmoy(ji,jj) + rtrn ) emoy (ji,jj,jk) = zetmp (ji,jj) * z1_dep enano(ji,jj,jk) = zetmp1(ji,jj) * z1_dep ediat(ji,jj,jk) = zetmp2(ji,jj) * z1_dep ENDIF END DO END DO END DO IF( ln_diatrc ) THEN ! save output diagnostics ! IF( lk_iomput ) THEN IF( jnt == nrdttrc ) THEN CALL iom_put( "Heup", heup(:,: ) * tmask(:,:,1) ) ! euphotic layer deptht CALL iom_put( "PAR" , etot(:,:,:) * tmask(:,:,:) ) ! Photosynthetically Available Radiation ENDIF ELSE trc2d(:,:, jp_pcs0_2d + 10) = heup(:,: ) * tmask(:,:,1) trc3d(:,:,:,jp_pcs0_3d + 3) = etot(:,:,:) * tmask(:,:,:) ENDIF ! ENDIF ! CALL wrk_dealloc( jpi, jpj, zdepmoy, zetmp, zetmp1, zetmp2 ) CALL wrk_dealloc( jpi, jpj, jpk, zekg, zekr, zekb, ze0, ze1, ze2, ze3 ) ! IF( nn_timing == 1 ) CALL timing_stop('p4z_opt') ! END SUBROUTINE p4z_opt SUBROUTINE p4z_opt_init !!---------------------------------------------------------------------- !! *** ROUTINE p4z_opt_init *** !! !! ** Purpose : Initialization of tabulated attenuation coef !!---------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('p4z_opt_init') ! CALL trc_oce_rgb( xkrgb ) ! tabulated attenuation coefficients nksrp = trc_oce_ext_lev( r_si2, 0.33e2 ) ! max level of light extinction (Blue Chl=0.01) ! IF(lwp) WRITE(numout,*) ' level of light extinction = ', nksrp, ' ref depth = ', gdepw_0(nksrp+1), ' m' ! etot (:,:,:) = 0._wp enano(:,:,:) = 0._wp ediat(:,:,:) = 0._wp IF( ln_qsr_bio ) etot3(:,:,:) = 0._wp ! IF( nn_timing == 1 ) CALL timing_stop('p4z_opt_init') ! END SUBROUTINE p4z_opt_init INTEGER FUNCTION p4z_opt_alloc() !!---------------------------------------------------------------------- !! *** ROUTINE p4z_opt_alloc *** !!---------------------------------------------------------------------- ALLOCATE( etot (jpi,jpj,jpk) , enano(jpi,jpj,jpk) , & & ediat(jpi,jpj,jpk) , emoy (jpi,jpj,jpk) , STAT=p4z_opt_alloc ) ! IF( p4z_opt_alloc /= 0 ) CALL ctl_warn('p4z_opt_alloc : failed to allocate arrays.') ! END FUNCTION p4z_opt_alloc #else !!---------------------------------------------------------------------- !! Dummy module : No PISCES bio-model !!---------------------------------------------------------------------- CONTAINS SUBROUTINE p4z_opt ! Empty routine END SUBROUTINE p4z_opt #endif !!====================================================================== END MODULE p4zopt