[935] | 1 | MODULE p4zopt |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE p4zopt *** |
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[1445] | 4 | !! TOP - PISCES : Compute the light availability in the water column |
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[935] | 5 | !!====================================================================== |
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| 6 | !! History : 1.0 ! 2004 (O. Aumont) Original code |
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| 7 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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[1445] | 8 | !! 3.2 ! 2009-04 (C. Ethe, G. Madec) optimisaion |
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[935] | 9 | !!---------------------------------------------------------------------- |
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[1445] | 10 | #if defined key_pisces |
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[935] | 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_pisces' PISCES bio-model |
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| 13 | !!---------------------------------------------------------------------- |
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[1445] | 14 | !! p4z_opt : light availability in the water column |
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[935] | 15 | !!---------------------------------------------------------------------- |
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[1445] | 16 | USE trc ! tracer variables |
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| 17 | USE oce_trc ! tracer-ocean share variables |
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| 18 | USE trc_oce ! ocean-tracer share variables |
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| 19 | USE sms_pisces ! Source Minus Sink of PISCES |
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[1457] | 20 | USE iom |
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[935] | 21 | |
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| 22 | IMPLICIT NONE |
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| 23 | PRIVATE |
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| 24 | |
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[1445] | 25 | PUBLIC p4z_opt ! called in p4zbio.F90 module |
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[935] | 26 | |
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[1445] | 27 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj,jpk) :: etot, enano, ediat !: PAR for phyto, nano and diat |
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| 28 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj,jpk) :: emoy !: averaged PAR in the mixed layer |
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[935] | 29 | |
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[1445] | 30 | INTEGER :: nksrp ! levels below which the light cannot penetrate ( depth larger than 391 m) |
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| 31 | REAL(wp) :: & |
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| 32 | parlux = 0.43 / 3.e0 |
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[935] | 33 | |
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[1445] | 34 | REAL(wp), DIMENSION(3,61), PUBLIC :: xkrgb !: tabulated attenuation coefficients for RGB absorption |
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| 35 | |
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[935] | 36 | !!* Substitution |
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[2007] | 37 | # include "top_substitute.h90" |
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[935] | 38 | !!---------------------------------------------------------------------- |
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| 39 | !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) |
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[1152] | 40 | !! $Id$ |
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[935] | 41 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 42 | !!---------------------------------------------------------------------- |
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| 43 | |
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| 44 | CONTAINS |
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| 45 | |
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| 46 | SUBROUTINE p4z_opt(kt, jnt) |
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| 47 | !!--------------------------------------------------------------------- |
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| 48 | !! *** ROUTINE p4z_opt *** |
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| 49 | !! |
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| 50 | !! ** Purpose : Compute the light availability in the water column |
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| 51 | !! depending on the depth and the chlorophyll concentration |
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| 52 | !! |
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| 53 | !! ** Method : - ??? |
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| 54 | !!--------------------------------------------------------------------- |
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| 55 | INTEGER, INTENT(in) :: kt, jnt ! ocean time step |
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[1445] | 56 | INTEGER :: ji, jj, jk, jc |
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[935] | 57 | INTEGER :: irgb |
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[1445] | 58 | REAL(wp) :: zchl, zxsi0r |
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| 59 | REAL(wp) :: zc0 , zc1 , zc2, zc3 |
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[935] | 60 | REAL(wp), DIMENSION(jpi,jpj) :: zdepmoy, zetmp |
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| 61 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zekg, zekr, zekb |
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[1445] | 62 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ze1 , ze2 , ze3, ze0 |
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[935] | 63 | !!--------------------------------------------------------------------- |
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| 64 | |
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| 65 | |
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[1445] | 66 | ! !* tabulated attenuation coef. |
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| 67 | IF( kt * jnt == nittrc000 ) THEN |
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| 68 | ! ! level of light extinction |
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| 69 | nksrp = trc_oce_ext_lev( rn_si2, 0.33e2 ) |
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| 70 | IF(lwp) THEN |
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| 71 | WRITE(numout,*) |
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| 72 | WRITE(numout,*) ' level max of computation of qsr = ', nksrp, ' ref depth = ', gdepw_0(nksrp+1), ' m' |
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| 73 | ENDIF |
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| 74 | !! CALL trc_oce_rgb( xkrgb ) ! tabulated attenuation coefficients |
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| 75 | CALL trc_oce_rgb_read( xkrgb ) ! tabulated attenuation coefficients |
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| 76 | etot (:,:,:) = 0.e0 |
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| 77 | enano(:,:,:) = 0.e0 |
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| 78 | ediat(:,:,:) = 0.e0 |
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| 79 | IF( ln_qsr_bio ) etot3(:,:,:) = 0.e0 |
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| 80 | ENDIF |
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[935] | 81 | |
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| 82 | |
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| 83 | ! Initialisation of variables used to compute PAR |
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| 84 | ! ----------------------------------------------- |
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[1445] | 85 | ze1 (:,:,jpk) = 0.e0 |
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| 86 | ze2 (:,:,jpk) = 0.e0 |
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| 87 | ze3 (:,:,jpk) = 0.e0 |
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[935] | 88 | |
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[1445] | 89 | ! !* attenuation coef. function of Chlorophyll and wavelength (Red-Green-Blue) |
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| 90 | DO jk = 1, jpkm1 ! -------------------------------------------------------- |
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| 91 | !CDIR NOVERRCHK |
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[935] | 92 | DO jj = 1, jpj |
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[1445] | 93 | !CDIR NOVERRCHK |
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[935] | 94 | DO ji = 1, jpi |
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| 95 | zchl = ( trn(ji,jj,jk,jpnch) + trn(ji,jj,jk,jpdch) + rtrn ) * 1.e6 |
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[1445] | 96 | zchl = MIN( 10. , MAX( 0.03, zchl ) ) |
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| 97 | irgb = NINT( 41 + 20.* LOG10( zchl ) + rtrn ) |
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| 98 | ! |
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| 99 | zekb(ji,jj,jk) = xkrgb(1,irgb) * fse3t(ji,jj,jk) |
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| 100 | zekg(ji,jj,jk) = xkrgb(2,irgb) * fse3t(ji,jj,jk) |
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| 101 | zekr(ji,jj,jk) = xkrgb(3,irgb) * fse3t(ji,jj,jk) |
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[935] | 102 | END DO |
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| 103 | END DO |
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| 104 | END DO |
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| 105 | |
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[1445] | 106 | !!gm Potential BUG must discuss with Olivier about this implementation.... |
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| 107 | !!gm the questions are : - PAR at T-point or mean PAR over T-level.... |
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| 108 | !!gm - shallow water: no penetration of light through the bottom.... |
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[935] | 109 | |
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| 110 | |
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[1445] | 111 | ! !* Photosynthetically Available Radiation (PAR) |
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| 112 | ! ! -------------------------------------- |
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[935] | 113 | !CDIR NOVERRCHK |
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[1445] | 114 | DO jj = 1, jpj |
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[935] | 115 | !CDIR NOVERRCHK |
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[1445] | 116 | DO ji = 1, jpi |
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| 117 | zc1 = parlux * qsr(ji,jj) * EXP( -0.5 * zekb(ji,jj,1) ) |
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| 118 | zc2 = parlux * qsr(ji,jj) * EXP( -0.5 * zekg(ji,jj,1) ) |
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| 119 | zc3 = parlux * qsr(ji,jj) * EXP( -0.5 * zekr(ji,jj,1) ) |
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| 120 | ze1 (ji,jj,1) = zc1 |
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| 121 | ze2 (ji,jj,1) = zc2 |
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| 122 | ze3 (ji,jj,1) = zc3 |
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| 123 | etot (ji,jj,1) = ( zc1 + zc2 + zc3 ) |
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| 124 | enano(ji,jj,1) = ( 2.1 * zc1 + 0.42 * zc2 + 0.4 * zc3 ) |
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| 125 | ediat(ji,jj,1) = ( 1.6 * zc1 + 0.69 * zc2 + 0.7 * zc3 ) |
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[935] | 126 | END DO |
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| 127 | END DO |
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| 128 | |
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[1445] | 129 | |
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| 130 | DO jk = 2, nksrp |
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[935] | 131 | !CDIR NOVERRCHK |
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| 132 | DO jj = 1, jpj |
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| 133 | !CDIR NOVERRCHK |
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| 134 | DO ji = 1, jpi |
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[1445] | 135 | zc1 = ze1(ji,jj,jk-1) * EXP( -0.5 * ( zekb(ji,jj,jk-1) + zekb(ji,jj,jk) ) ) |
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| 136 | zc2 = ze2(ji,jj,jk-1) * EXP( -0.5 * ( zekg(ji,jj,jk-1) + zekg(ji,jj,jk) ) ) |
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| 137 | zc3 = ze3(ji,jj,jk-1) * EXP( -0.5 * ( zekr(ji,jj,jk-1) + zekr(ji,jj,jk) ) ) |
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| 138 | ze1 (ji,jj,jk) = zc1 |
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| 139 | ze2 (ji,jj,jk) = zc2 |
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| 140 | ze3 (ji,jj,jk) = zc3 |
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| 141 | etot (ji,jj,jk) = ( zc1 + zc2 + zc3 ) |
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| 142 | enano(ji,jj,jk) = ( 2.1 * zc1 + 0.42 * zc2 + 0.4 * zc3 ) |
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| 143 | ediat(ji,jj,jk) = ( 1.6 * zc1 + 0.69 * zc2 + 0.7 * zc3 ) |
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[935] | 144 | END DO |
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| 145 | END DO |
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[1445] | 146 | END DO |
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[935] | 147 | |
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[1445] | 148 | IF( ln_qsr_bio ) THEN !* heat flux accros w-level (used in the dynamics) |
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| 149 | ! ! ------------------------ |
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| 150 | zxsi0r = 1.e0 / rn_si0 |
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| 151 | ! |
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| 152 | ze0 (:,:,1) = rn_abs * qsr(:,:) |
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| 153 | ze1 (:,:,1) = parlux * qsr(:,:) ! surface value : separation in R-G-B + near surface |
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| 154 | ze2 (:,:,1) = parlux * qsr(:,:) |
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| 155 | ze3 (:,:,1) = parlux * qsr(:,:) |
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| 156 | etot3(:,:,1) = qsr(:,:) * tmask(:,:,1) |
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| 157 | ! |
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| 158 | DO jk = 2, nksrp+1 |
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[935] | 159 | !CDIR NOVERRCHK |
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| 160 | DO jj = 1, jpj |
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| 161 | !CDIR NOVERRCHK |
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| 162 | DO ji = 1, jpi |
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[1445] | 163 | zc0 = ze0(ji,jj,jk-1) * EXP( -fse3t(ji,jj,jk-1) * zxsi0r ) |
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| 164 | zc1 = ze1(ji,jj,jk-1) * EXP( -zekb(ji,jj,jk-1 ) ) |
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| 165 | zc2 = ze2(ji,jj,jk-1) * EXP( -zekg(ji,jj,jk-1 ) ) |
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| 166 | zc3 = ze3(ji,jj,jk-1) * EXP( -zekr(ji,jj,jk-1 ) ) |
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| 167 | ze0(ji,jj,jk) = zc0 |
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| 168 | ze1(ji,jj,jk) = zc1 |
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| 169 | ze2(ji,jj,jk) = zc2 |
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| 170 | ze3(ji,jj,jk) = zc3 |
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| 171 | etot3(ji,jj,jk) = ( zc0 + zc1 + zc2 + zc3 ) * tmask(ji,jj,jk) |
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| 172 | END DO |
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| 173 | ! |
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[935] | 174 | END DO |
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[1445] | 175 | ! |
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| 176 | END DO |
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| 177 | ! |
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[935] | 178 | ENDIF |
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| 179 | |
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[1445] | 180 | ! !* Euphotic depth and level |
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| 181 | neln(:,:) = 1 ! ------------------------ |
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[1180] | 182 | heup(:,:) = 300. |
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[935] | 183 | |
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[1445] | 184 | DO jk = 2, nksrp |
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[935] | 185 | DO jj = 1, jpj |
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[1180] | 186 | DO ji = 1, jpi |
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| 187 | IF( etot(ji,jj,jk) >= 0.0043 * qsr(ji,jj) ) THEN |
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[1445] | 188 | neln(ji,jj) = jk+1 ! Euphotic level : 1rst T-level strictly below Euphotic layer |
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| 189 | ! ! nb: ensure the compatibility with nmld_trc definition in trd_mld_trc_zint |
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| 190 | heup(ji,jj) = fsdepw(ji,jj,jk+1) ! Euphotic layer depth |
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| 191 | ENDIF |
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| 192 | END DO |
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[1180] | 193 | END DO |
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[1445] | 194 | END DO |
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[1180] | 195 | |
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[1445] | 196 | heup(:,:) = MIN( 300., heup(:,:) ) |
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[935] | 197 | |
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[1445] | 198 | ! !* mean light over the mixed layer |
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| 199 | zdepmoy(:,:) = 0.e0 ! ------------------------------- |
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[935] | 200 | zetmp (:,:) = 0.e0 |
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| 201 | emoy (:,:,:) = 0.e0 |
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| 202 | |
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[1445] | 203 | DO jk = 1, nksrp |
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| 204 | !CDIR NOVERRCHK |
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[935] | 205 | DO jj = 1, jpj |
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[1445] | 206 | !CDIR NOVERRCHK |
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[935] | 207 | DO ji = 1, jpi |
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| 208 | IF( fsdepw(ji,jj,jk+1) <= hmld(ji,jj) ) THEN |
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| 209 | zetmp (ji,jj) = zetmp (ji,jj) + etot(ji,jj,jk) * fse3t(ji,jj,jk) |
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| 210 | zdepmoy(ji,jj) = zdepmoy(ji,jj) + fse3t(ji,jj,jk) |
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| 211 | ENDIF |
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| 212 | END DO |
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| 213 | END DO |
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| 214 | END DO |
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[1445] | 215 | ! |
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[935] | 216 | emoy(:,:,:) = etot(:,:,:) |
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[1445] | 217 | ! |
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| 218 | DO jk = 1, nksrp |
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| 219 | !CDIR NOVERRCHK |
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[935] | 220 | DO jj = 1, jpj |
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[1445] | 221 | !CDIR NOVERRCHK |
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[935] | 222 | DO ji = 1, jpi |
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[1445] | 223 | IF( fsdepw(ji,jj,jk+1) <= hmld(ji,jj) ) & |
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| 224 | & emoy(ji,jj,jk) = zetmp(ji,jj) / ( zdepmoy(ji,jj) + rtrn ) |
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[935] | 225 | END DO |
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| 226 | END DO |
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| 227 | END DO |
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| 228 | |
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[1457] | 229 | #if defined key_trc_diaadd |
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| 230 | # if ! defined key_iomput |
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| 231 | ! save for outputs |
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| 232 | trc2d(:,:, jp_pcs0_2d + 10) = heup(:,: ) * tmask(:,:,1) |
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| 233 | trc3d(:,:,:,jp_pcs0_3d + 3) = etot(:,:,:) * tmask(:,:,:) |
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| 234 | # else |
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| 235 | ! write diagnostics |
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[2007] | 236 | IF( jnt == nrdttrc ) then |
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| 237 | CALL iom_put( "Heup", heup(:,: ) * tmask(:,:,1) ) ! euphotic layer deptht |
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| 238 | CALL iom_put( "PAR" , etot(:,:,:) * tmask(:,:,:) ) ! Photosynthetically Available Radiation |
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| 239 | ENDIF |
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[935] | 240 | # endif |
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[1457] | 241 | #endif |
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[935] | 242 | ! |
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| 243 | END SUBROUTINE p4z_opt |
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| 244 | |
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| 245 | #else |
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[1445] | 246 | !!---------------------------------------------------------------------- |
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[935] | 247 | !! Dummy module : No PISCES bio-model |
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[1445] | 248 | !!---------------------------------------------------------------------- |
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[935] | 249 | CONTAINS |
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| 250 | SUBROUTINE p4z_opt ! Empty routine |
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| 251 | END SUBROUTINE p4z_opt |
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| 252 | #endif |
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| 253 | |
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| 254 | !!====================================================================== |
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| 255 | END MODULE p4zopt |
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