[934] | 1 | MODULE trcopt |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE trcopt *** |
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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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[1445] | 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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[934] | 12 | !!---------------------------------------------------------------------- |
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| 13 | #if defined key_lobster |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | !! 'key_lobster' LOBSTER bio-model |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | !! trc_opt : Compute the light availability in the water column |
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| 18 | !!---------------------------------------------------------------------- |
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| 19 | USE oce_trc ! |
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[1119] | 20 | USE trc |
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[1071] | 21 | USE sms_lobster |
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[934] | 22 | USE prtctl_trc ! Print control for debbuging |
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| 23 | |
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| 24 | IMPLICIT NONE |
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| 25 | PRIVATE |
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| 26 | |
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| 27 | PUBLIC trc_opt ! called in trcprg.F90 |
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| 28 | |
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| 29 | !!* Substitution |
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[1800] | 30 | # include "top_substitute.h90" |
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[934] | 31 | !!---------------------------------------------------------------------- |
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[2528] | 32 | !! NEMO/TOP 3.3 , NEMO Consortium (2010) |
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[1146] | 33 | !! $Id$ |
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[2528] | 34 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[934] | 35 | !!---------------------------------------------------------------------- |
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| 36 | |
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| 37 | CONTAINS |
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| 38 | |
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| 39 | SUBROUTINE trc_opt( kt ) |
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| 40 | !!--------------------------------------------------------------------- |
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| 41 | !! *** ROUTINE trc_opt *** |
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| 42 | !! |
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| 43 | !! ** Purpose : computes the light propagation in the water column |
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| 44 | !! and the euphotic layer depth |
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| 45 | !! |
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| 46 | !! ** Method : local par is computed in w layers using light propagation |
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| 47 | !! mean par in t layers are computed by integration |
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[1445] | 48 | !! |
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| 49 | !!gm please remplace the '???' by true comments |
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| 50 | !! ** Action : xpar ??? |
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| 51 | !! neln ??? |
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| 52 | !! xze ??? |
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[934] | 53 | !!--------------------------------------------------------------------- |
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[2715] | 54 | !! |
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[934] | 55 | INTEGER, INTENT( in ) :: kt ! index of the time stepping |
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[1445] | 56 | !! |
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| 57 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 58 | CHARACTER (len=25) :: charout ! temporary character |
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| 59 | REAL(wp) :: zpig ! log of the total pigment |
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| 60 | REAL(wp) :: zkr, zkg ! total absorption coefficient in red and green |
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| 61 | REAL(wp) :: zcoef ! temporary scalar |
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[3294] | 62 | REAL(wp), POINTER, DIMENSION(:,: ) :: zpar100, zpar0m |
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| 63 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zparr, zparg |
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[934] | 64 | !!--------------------------------------------------------------------- |
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[3294] | 65 | ! |
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| 66 | IF( nn_timing == 1 ) CALL timing_start('trc_opt') |
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| 67 | ! |
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| 68 | ! Allocate temporary workspace |
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| 69 | CALL wrk_alloc( jpi, jpj, zpar100, zpar0m ) |
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| 70 | CALL wrk_alloc( jpi, jpj, jpk, zparr, zparg ) |
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[934] | 71 | |
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[3294] | 72 | IF( kt == nittrc000 ) THEN |
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[934] | 73 | IF(lwp) WRITE(numout,*) |
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[1445] | 74 | IF(lwp) WRITE(numout,*) ' trc_opt : LOBSTER optic-model' |
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| 75 | IF(lwp) WRITE(numout,*) ' ~~~~~~~ ' |
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[934] | 76 | ENDIF |
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| 77 | |
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[1445] | 78 | ! ! surface irradiance |
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| 79 | zpar0m (:,:) = qsr (:,:) * 0.43 ! ------------------ |
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[934] | 80 | zpar100(:,:) = zpar0m(:,:) * 0.01 |
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| 81 | xpar (:,:,1) = zpar0m(:,:) |
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[1445] | 82 | zparr (:,:,1) = zpar0m(:,:) * 0.5 |
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| 83 | zparg (:,:,1) = zpar0m(:,:) * 0.5 |
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[934] | 84 | |
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[1445] | 85 | ! ! Photosynthetically Available Radiation (PAR) |
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| 86 | zcoef = 12 * redf / rcchl / rpig ! -------------------------------------- |
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| 87 | DO jk = 2, jpk ! local par at w-levels |
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[934] | 88 | DO jj = 1, jpj |
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| 89 | DO ji = 1, jpi |
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[2528] | 90 | zpig = LOG( MAX( TINY(0.), trn(ji,jj,jk-1,jp_lob_phy) ) * zcoef ) |
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[1445] | 91 | zkr = xkr0 + xkrp * EXP( xlr * zpig ) |
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| 92 | zkg = xkg0 + xkgp * EXP( xlg * zpig ) |
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[934] | 93 | zparr(ji,jj,jk) = zparr(ji,jj,jk-1) * EXP( -zkr * fse3t(ji,jj,jk-1) ) |
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| 94 | zparg(ji,jj,jk) = zparg(ji,jj,jk-1) * EXP( -zkg * fse3t(ji,jj,jk-1) ) |
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| 95 | END DO |
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| 96 | END DO |
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| 97 | END DO |
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[1445] | 98 | DO jk = 1, jpkm1 ! mean par at t-levels |
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[934] | 99 | DO jj = 1, jpj |
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| 100 | DO ji = 1, jpi |
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[2528] | 101 | zpig = LOG( MAX( TINY(0.), trn(ji,jj,jk,jp_lob_phy) ) * zcoef ) |
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[1445] | 102 | zkr = xkr0 + xkrp * EXP( xlr * zpig ) |
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| 103 | zkg = xkg0 + xkgp * EXP( xlg * zpig ) |
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| 104 | zparr(ji,jj,jk) = zparr(ji,jj,jk) / ( zkr * fse3t(ji,jj,jk) ) * ( 1 - EXP( -zkr * fse3t(ji,jj,jk) ) ) |
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| 105 | zparg(ji,jj,jk) = zparg(ji,jj,jk) / ( zkg * fse3t(ji,jj,jk) ) * ( 1 - EXP( -zkg * fse3t(ji,jj,jk) ) ) |
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[934] | 106 | xpar (ji,jj,jk) = MAX( zparr(ji,jj,jk) + zparg(ji,jj,jk), 1.e-15 ) |
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| 107 | END DO |
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| 108 | END DO |
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| 109 | END DO |
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| 110 | |
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[1445] | 111 | ! ! Euphotic layer |
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| 112 | ! ! -------------- |
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| 113 | neln(:,:) = 1 ! euphotic layer level |
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| 114 | DO jk = 1, jpk ! (i.e. 1rst T-level strictly below EL bottom) |
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[934] | 115 | DO jj = 1, jpj |
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[1176] | 116 | DO ji = 1, jpi |
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[1445] | 117 | IF( xpar(ji,jj,jk) >= zpar100(ji,jj) ) neln(ji,jj) = jk + 1 |
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| 118 | ! ! nb. this is to ensure compatibility with |
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| 119 | ! ! nmld_trc definition in trd_mld_trc_zint |
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[1176] | 120 | END DO |
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[934] | 121 | END DO |
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[1445] | 122 | END DO |
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| 123 | ! ! Euphotic layer depth |
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[1176] | 124 | DO jj = 1, jpj |
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| 125 | DO ji = 1, jpi |
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[1445] | 126 | xze(ji,jj) = fsdepw(ji,jj,neln(ji,jj)) |
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[934] | 127 | END DO |
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[1445] | 128 | END DO |
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[934] | 129 | |
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[1176] | 130 | |
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[1445] | 131 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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[934] | 132 | WRITE(charout, FMT="('opt')") |
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[1445] | 133 | CALL prt_ctl_trc_info( charout ) |
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[1119] | 134 | CALL prt_ctl_trc( tab4d=trn, mask=tmask, clinfo=ctrcnm ) |
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[934] | 135 | ENDIF |
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[1445] | 136 | ! |
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[3294] | 137 | CALL wrk_dealloc( jpi, jpj, zpar100, zpar0m ) |
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| 138 | CALL wrk_dealloc( jpi, jpj, jpk, zparr, zparg ) |
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[2715] | 139 | ! |
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[3294] | 140 | IF( nn_timing == 1 ) CALL timing_stop('trc_opt') |
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| 141 | ! |
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[934] | 142 | END SUBROUTINE trc_opt |
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| 143 | |
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| 144 | #else |
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| 145 | !!====================================================================== |
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| 146 | !! Dummy module : No PISCES bio-model |
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| 147 | !!====================================================================== |
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| 148 | CONTAINS |
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| 149 | SUBROUTINE trc_opt( kt ) ! Empty routine |
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| 150 | INTEGER, INTENT( in ) :: kt |
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| 151 | WRITE(*,*) 'trc_opt: You should not have seen this print! error?', kt |
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| 152 | END SUBROUTINE trc_opt |
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| 153 | #endif |
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| 154 | |
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| 155 | !!====================================================================== |
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| 156 | END MODULE trcopt |
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