[3443] | 1 | MODULE p2zopt |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE p2zopt *** |
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| 4 | !! TOP : LOBSTER Compute the light availability in the water column |
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| 5 | !!====================================================================== |
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| 6 | !! History : - ! 1995-05 (M. Levy) Original code |
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| 7 | !! - ! 1999-09 (J.-M. Andre, M. Levy) |
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| 8 | !! - ! 1999-11 (C. Menkes, M.-A. Foujols) itabe initial |
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| 9 | !! - ! 2000-02 (M.A. Foujols) change x**y par exp(y*log(x)) |
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| 10 | !! NEMO 2.0 ! 2007-12 (C. Deltel, G. Madec) F90 |
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| 11 | !! 3.2 ! 2009-04 (C. Ethe, G. Madec) minor optimisation + style |
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| 12 | !!---------------------------------------------------------------------- |
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[9124] | 13 | |
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| 14 | !!---------------------------------------------------------------------- |
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[3443] | 15 | !! p2z_opt : Compute the light availability in the water column |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | USE oce_trc ! |
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| 18 | USE trc |
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| 19 | USE sms_pisces |
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| 20 | USE prtctl_trc ! Print control for debbuging |
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| 21 | |
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| 22 | IMPLICIT NONE |
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| 23 | PRIVATE |
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| 24 | |
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| 25 | PUBLIC p2z_opt ! |
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| 26 | PUBLIC p2z_opt_init ! |
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| 27 | |
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[4147] | 28 | REAL(wp), PUBLIC :: xkr0 !: water coefficient absorption in red |
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| 29 | REAL(wp), PUBLIC :: xkg0 !: water coefficient absorption in green |
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| 30 | REAL(wp), PUBLIC :: xkrp !: pigment coefficient absorption in red |
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| 31 | REAL(wp), PUBLIC :: xkgp !: pigment coefficient absorption in green |
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| 32 | REAL(wp), PUBLIC :: xlr !: exposant for pigment absorption in red |
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| 33 | REAL(wp), PUBLIC :: xlg !: exposant for pigment absorption in green |
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| 34 | REAL(wp), PUBLIC :: rpig !: chla/chla+phea ratio |
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[3443] | 35 | ! |
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[4147] | 36 | REAL(wp), PUBLIC :: rcchl ! Carbone/Chlorophyl ratio [mgC.mgChla-1] |
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| 37 | REAL(wp), PUBLIC :: redf ! redfield ratio (C:N) for phyto |
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| 38 | REAL(wp), PUBLIC :: reddom ! redfield ratio (C:N) for DOM |
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[3443] | 39 | |
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| 40 | !!---------------------------------------------------------------------- |
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[10067] | 41 | !! NEMO/TOP 4.0 , NEMO Consortium (2018) |
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[5215] | 42 | !! $Id$ |
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[10068] | 43 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[3443] | 44 | !!---------------------------------------------------------------------- |
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| 45 | CONTAINS |
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| 46 | |
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| 47 | SUBROUTINE p2z_opt( kt ) |
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| 48 | !!--------------------------------------------------------------------- |
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| 49 | !! *** ROUTINE p2z_opt *** |
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| 50 | !! |
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| 51 | !! ** Purpose : computes the light propagation in the water column |
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| 52 | !! and the euphotic layer depth |
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| 53 | !! |
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| 54 | !! ** Method : local par is computed in w layers using light propagation |
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| 55 | !! mean par in t layers are computed by integration |
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| 56 | !! |
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| 57 | !!gm please remplace the '???' by true comments |
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| 58 | !! ** Action : etot ??? |
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| 59 | !! neln ??? |
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| 60 | !!--------------------------------------------------------------------- |
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| 61 | !! |
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| 62 | INTEGER, INTENT( in ) :: kt ! index of the time stepping |
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| 63 | !! |
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| 64 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 65 | CHARACTER (len=25) :: charout ! temporary character |
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| 66 | REAL(wp) :: zpig ! log of the total pigment |
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| 67 | REAL(wp) :: zkr, zkg ! total absorption coefficient in red and green |
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| 68 | REAL(wp) :: zcoef ! temporary scalar |
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[9125] | 69 | REAL(wp), DIMENSION(jpi,jpj ) :: zpar100, zpar0m |
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| 70 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zparr, zparg |
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[3443] | 71 | !!--------------------------------------------------------------------- |
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| 72 | ! |
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[9124] | 73 | IF( ln_timing ) CALL timing_start('p2z_opt') |
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[3443] | 74 | ! |
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| 75 | |
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| 76 | IF( kt == nittrc000 ) THEN |
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| 77 | IF(lwp) WRITE(numout,*) |
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| 78 | IF(lwp) WRITE(numout,*) ' p2z_opt : LOBSTER optic-model' |
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| 79 | IF(lwp) WRITE(numout,*) ' ~~~~~~~ ' |
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| 80 | ENDIF |
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| 81 | |
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| 82 | ! ! surface irradiance |
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[5385] | 83 | ! ! ------------------ |
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| 84 | IF( ln_dm2dc ) THEN ; zpar0m(:,:) = qsr_mean(:,:) * 0.43 |
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| 85 | ELSE ; zpar0m(:,:) = qsr (:,:) * 0.43 |
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| 86 | ENDIF |
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[3443] | 87 | zpar100(:,:) = zpar0m(:,:) * 0.01 |
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| 88 | zparr (:,:,1) = zpar0m(:,:) * 0.5 |
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| 89 | zparg (:,:,1) = zpar0m(:,:) * 0.5 |
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| 90 | |
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| 91 | ! ! Photosynthetically Available Radiation (PAR) |
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| 92 | zcoef = 12 * redf / rcchl / rpig ! -------------------------------------- |
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| 93 | DO jk = 2, jpk ! local par at w-levels |
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| 94 | DO jj = 1, jpj |
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| 95 | DO ji = 1, jpi |
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| 96 | zpig = LOG( MAX( TINY(0.), trn(ji,jj,jk-1,jpphy) ) * zcoef ) |
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| 97 | zkr = xkr0 + xkrp * EXP( xlr * zpig ) |
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| 98 | zkg = xkg0 + xkgp * EXP( xlg * zpig ) |
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[6140] | 99 | zparr(ji,jj,jk) = zparr(ji,jj,jk-1) * EXP( -zkr * e3t_n(ji,jj,jk-1) ) |
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| 100 | zparg(ji,jj,jk) = zparg(ji,jj,jk-1) * EXP( -zkg * e3t_n(ji,jj,jk-1) ) |
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[3443] | 101 | END DO |
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| 102 | END DO |
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| 103 | END DO |
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| 104 | DO jk = 1, jpkm1 ! mean par at t-levels |
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| 105 | DO jj = 1, jpj |
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| 106 | DO ji = 1, jpi |
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| 107 | zpig = LOG( MAX( TINY(0.), trn(ji,jj,jk,jpphy) ) * zcoef ) |
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| 108 | zkr = xkr0 + xkrp * EXP( xlr * zpig ) |
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| 109 | zkg = xkg0 + xkgp * EXP( xlg * zpig ) |
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[6140] | 110 | zparr(ji,jj,jk) = zparr(ji,jj,jk) / ( zkr * e3t_n(ji,jj,jk) ) * ( 1 - EXP( -zkr * e3t_n(ji,jj,jk) ) ) |
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| 111 | zparg(ji,jj,jk) = zparg(ji,jj,jk) / ( zkg * e3t_n(ji,jj,jk) ) * ( 1 - EXP( -zkg * e3t_n(ji,jj,jk) ) ) |
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[3443] | 112 | etot (ji,jj,jk) = MAX( zparr(ji,jj,jk) + zparg(ji,jj,jk), 1.e-15 ) |
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| 113 | END DO |
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| 114 | END DO |
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| 115 | END DO |
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| 116 | |
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| 117 | ! ! Euphotic layer |
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| 118 | ! ! -------------- |
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| 119 | neln(:,:) = 1 ! euphotic layer level |
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[9019] | 120 | DO jk = 1, jpkm1 ! (i.e. 1rst T-level strictly below EL bottom) |
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[3443] | 121 | DO jj = 1, jpj |
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| 122 | DO ji = 1, jpi |
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| 123 | IF( etot(ji,jj,jk) >= zpar100(ji,jj) ) neln(ji,jj) = jk + 1 |
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| 124 | END DO |
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| 125 | END DO |
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| 126 | END DO |
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| 127 | ! ! Euphotic layer depth |
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| 128 | DO jj = 1, jpj |
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| 129 | DO ji = 1, jpi |
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[6140] | 130 | heup(ji,jj) = gdepw_n(ji,jj,neln(ji,jj)) |
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[3443] | 131 | END DO |
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| 132 | END DO |
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| 133 | |
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| 134 | |
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| 135 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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| 136 | WRITE(charout, FMT="('opt')") |
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| 137 | CALL prt_ctl_trc_info( charout ) |
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| 138 | CALL prt_ctl_trc( tab4d=trn, mask=tmask, clinfo=ctrcnm ) |
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| 139 | ENDIF |
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| 140 | ! |
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[9124] | 141 | IF( ln_timing ) CALL timing_stop('p2z_opt') |
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[3443] | 142 | ! |
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| 143 | END SUBROUTINE p2z_opt |
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| 144 | |
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[9019] | 145 | |
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[3443] | 146 | SUBROUTINE p2z_opt_init |
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| 147 | !!---------------------------------------------------------------------- |
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| 148 | !! *** ROUTINE p2z_opt_init *** |
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| 149 | !! |
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| 150 | !! ** Purpose : optical parameters |
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| 151 | !! |
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| 152 | !! ** Method : Read the namlobopt namelist and check the parameters |
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| 153 | !! |
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| 154 | !!---------------------------------------------------------------------- |
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[9124] | 155 | INTEGER :: ios ! Local integer |
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| 156 | !! |
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[3443] | 157 | NAMELIST/namlobopt/ xkg0, xkr0, xkgp, xkrp, xlg, xlr, rpig |
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| 158 | NAMELIST/namlobrat/ rcchl, redf, reddom |
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| 159 | !!---------------------------------------------------------------------- |
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| 160 | |
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[4147] | 161 | REWIND( numnatp_ref ) ! Namelist namlobopt in reference namelist : Lobster options |
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| 162 | READ ( numnatp_ref, namlobopt, IOSTAT = ios, ERR = 901) |
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[11536] | 163 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namlobopt in reference namelist' ) |
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[3443] | 164 | |
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[4147] | 165 | REWIND( numnatp_cfg ) ! Namelist namlobopt in configuration namelist : Lobster options |
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| 166 | READ ( numnatp_cfg, namlobopt, IOSTAT = ios, ERR = 902 ) |
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[11536] | 167 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namlobopt in configuration namelist' ) |
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[4624] | 168 | IF(lwm) WRITE ( numonp, namlobopt ) |
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[4147] | 169 | |
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[3443] | 170 | IF(lwp) THEN |
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| 171 | WRITE(numout,*) |
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| 172 | WRITE(numout,*) ' Namelist namlobopt' |
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| 173 | WRITE(numout,*) ' green water absorption coeff xkg0 = ', xkg0 |
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| 174 | WRITE(numout,*) ' red water absorption coeff xkr0 = ', xkr0 |
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| 175 | WRITE(numout,*) ' pigment red absorption coeff xkrp = ', xkrp |
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| 176 | WRITE(numout,*) ' pigment green absorption coeff xkgp = ', xkgp |
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| 177 | WRITE(numout,*) ' green chl exposant xlg = ', xlg |
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| 178 | WRITE(numout,*) ' red chl exposant xlr = ', xlr |
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| 179 | WRITE(numout,*) ' chla/chla+phea ratio rpig = ', rpig |
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| 180 | WRITE(numout,*) ' ' |
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| 181 | ENDIF |
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| 182 | ! |
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[4147] | 183 | REWIND( numnatp_ref ) ! Namelist namlobrat in reference namelist : Lobster ratios |
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| 184 | READ ( numnatp_ref, namlobrat, IOSTAT = ios, ERR = 903) |
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[11536] | 185 | 903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namlobrat in reference namelist' ) |
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[3443] | 186 | |
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[4147] | 187 | REWIND( numnatp_cfg ) ! Namelist namlobrat in configuration namelist : Lobster ratios |
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| 188 | READ ( numnatp_cfg, namlobrat, IOSTAT = ios, ERR = 904 ) |
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[11536] | 189 | 904 IF( ios > 0 ) CALL ctl_nam ( ios , 'namlobrat in configuration namelist' ) |
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[4624] | 190 | IF(lwm) WRITE ( numonp, namlobrat ) |
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[4147] | 191 | |
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[3443] | 192 | IF(lwp) THEN |
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| 193 | WRITE(numout,*) ' Namelist namlobrat' |
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| 194 | WRITE(numout,*) ' carbone/chlorophyl ratio rcchl = ', rcchl |
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| 195 | WRITE(numout,*) ' redfield ratio c:n for phyto redf =', redf |
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| 196 | WRITE(numout,*) ' redfield ratio c:n for DOM reddom =', reddom |
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| 197 | WRITE(numout,*) ' ' |
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| 198 | ENDIF |
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| 199 | ! |
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| 200 | END SUBROUTINE p2z_opt_init |
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| 201 | |
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| 202 | !!====================================================================== |
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[9788] | 203 | END MODULE p2zopt |
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