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) optimisaion !!---------------------------------------------------------------------- #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 trc_oce ! ocean-tracer share variables USE sms_pisces ! Source Minus Sink of PISCES USE iom IMPLICIT NONE PRIVATE PUBLIC p4z_opt ! called in p4zbio.F90 module REAL(wp), PUBLIC, DIMENSION(jpi,jpj,jpk) :: etot, enano, ediat !: PAR for phyto, nano and diat REAL(wp), PUBLIC, DIMENSION(jpi,jpj,jpk) :: 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 / 3.e0 REAL(wp), DIMENSION(3,61), PUBLIC :: xkrgb !: tabulated attenuation coefficients for RGB absorption !!* 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_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, jc INTEGER :: irgb REAL(wp) :: zchl, zxsi0r REAL(wp) :: zc0 , zc1 , zc2, zc3 REAL(wp), DIMENSION(jpi,jpj) :: zdepmoy, zetmp REAL(wp), DIMENSION(jpi,jpj,jpk) :: zekg, zekr, zekb REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze1 , ze2 , ze3, ze0 #if defined key_trc_diaadd && defined key_iomput REAL(wp), DIMENSION(jpi,jpj) :: zw2d REAL(wp), DIMENSION(jpi,jpj,jpk) :: zw3d #endif !!--------------------------------------------------------------------- ! !* tabulated attenuation coef. IF( kt * jnt == nittrc000 ) THEN ! ! level of light extinction nksrp = trc_oce_ext_lev( rn_si2, 0.33e2 ) IF(lwp) THEN WRITE(numout,*) WRITE(numout,*) ' level max of computation of qsr = ', nksrp, ' ref depth = ', gdepw_0(nksrp+1), ' m' ENDIF !! CALL trc_oce_rgb( xkrgb ) ! tabulated attenuation coefficients CALL trc_oce_rgb_read( xkrgb ) ! tabulated attenuation coefficients etot (:,:,:) = 0.e0 enano(:,:,:) = 0.e0 ediat(:,:,:) = 0.e0 IF( ln_qsr_bio ) etot3(:,:,:) = 0.e0 ENDIF ! Initialisation of variables used to compute PAR ! ----------------------------------------------- ze1 (:,:,jpk) = 0.e0 ze2 (:,:,jpk) = 0.e0 ze3 (:,:,jpk) = 0.e0 ! !* 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( 0.03, 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 !!gm Potential BUG must discuss with Olivier about this implementation.... !!gm the questions are : - PAR at T-point or mean PAR over T-level.... !!gm - shallow water: no penetration of light through the bottom.... ! !* 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 emoy (:,:,:) = 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) 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) ) & & emoy(ji,jj,jk) = zetmp(ji,jj) / ( zdepmoy(ji,jj) + rtrn ) END DO END DO END DO #if defined key_trc_diaadd # if ! defined key_iomput ! save for outputs trc2d(:,:, jp_pcs0_2d + 10) = heup(:,: ) * tmask(:,:,1) trc3d(:,:,:,jp_pcs0_3d + 3) = etot(:,:,:) * tmask(:,:,:) # else ! write diagnostics zw2d(:,: ) = heup(:,: ) * tmask(:,:,1) zw3d(:,:,:) = etot(:,:,:) * tmask(:,:,:) IF( jnt == nrdttrc ) CALL iom_put( "Heup", zw2d ) IF( jnt == nrdttrc ) CALL iom_put( "PAR" , zw3d ) # endif #endif ! END SUBROUTINE p4z_opt #else !!---------------------------------------------------------------------- !! Dummy module : No PISCES bio-model !!---------------------------------------------------------------------- CONTAINS SUBROUTINE p4z_opt ! Empty routine END SUBROUTINE p4z_opt #endif !!====================================================================== END MODULE p4zopt