[935] | 1 | MODULE p4zlim |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE p4zlim *** |
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| 4 | !! TOP : PISCES |
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| 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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[3294] | 8 | !! 3.4 ! 2011-04 (O. Aumont, C. Ethe) Limitation for iron modelled in quota |
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[935] | 9 | !!---------------------------------------------------------------------- |
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| 10 | #if defined key_pisces |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_pisces' PISCES bio-model |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !! p4z_lim : Compute the nutrients limitation terms |
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| 15 | !! p4z_lim_init : Read the namelist |
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| 16 | !!---------------------------------------------------------------------- |
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[3294] | 17 | USE oce_trc ! Shared ocean-passive tracers variables |
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| 18 | USE trc ! Tracers defined |
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| 19 | USE sms_pisces ! PISCES variables |
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| 20 | USE p4zopt ! Optical |
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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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[1073] | 25 | PUBLIC p4z_lim |
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[2528] | 26 | PUBLIC p4z_lim_init |
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[935] | 27 | |
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| 28 | !! * Shared module variables |
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[3294] | 29 | REAL(wp), PUBLIC :: conc0 = 2.e-6_wp !: NO3, PO4 half saturation |
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| 30 | REAL(wp), PUBLIC :: conc1 = 8.e-6_wp !: Phosphate half saturation for diatoms |
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| 31 | REAL(wp), PUBLIC :: conc2 = 1.e-9_wp !: Iron half saturation for nanophyto |
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| 32 | REAL(wp), PUBLIC :: conc2m = 3.e-9_wp !: Max iron half saturation for nanophyto |
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| 33 | REAL(wp), PUBLIC :: conc3 = 2.e-9_wp !: Iron half saturation for diatoms |
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| 34 | REAL(wp), PUBLIC :: conc3m = 8.e-9_wp !: Max iron half saturation for diatoms |
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| 35 | REAL(wp), PUBLIC :: xsizedia = 5.e-7_wp !: Minimum size criteria for diatoms |
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| 36 | REAL(wp), PUBLIC :: xsizephy = 1.e-6_wp !: Minimum size criteria for nanophyto |
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| 37 | REAL(wp), PUBLIC :: concnnh4 = 1.e-7_wp !: NH4 half saturation for phyto |
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| 38 | REAL(wp), PUBLIC :: concdnh4 = 4.e-7_wp !: NH4 half saturation for diatoms |
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| 39 | REAL(wp), PUBLIC :: xksi1 = 2.E-6_wp !: half saturation constant for Si uptake |
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| 40 | REAL(wp), PUBLIC :: xksi2 = 3.33e-6_wp !: half saturation constant for Si/C |
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| 41 | REAL(wp), PUBLIC :: xkdoc = 417.e-6_wp !: 2nd half-sat. of DOC remineralization |
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| 42 | REAL(wp), PUBLIC :: concfebac = 1.E-11_wp !: Fe half saturation for bacteria |
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| 43 | REAL(wp), PUBLIC :: qnfelim = 7.E-6_wp !: optimal Fe quota for nanophyto |
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| 44 | REAL(wp), PUBLIC :: qdfelim = 7.E-6_wp !: optimal Fe quota for diatoms |
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| 45 | REAL(wp), PUBLIC :: caco3r = 0.16_wp !: mean rainratio |
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[935] | 46 | |
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[3294] | 47 | ! Coefficient for iron limitation |
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| 48 | REAL(wp) :: xcoef1 = 0.0016 / 55.85 |
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| 49 | REAL(wp) :: xcoef2 = 1.21E-5 * 14. / 55.85 / 7.625 * 0.5 * 1.5 |
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| 50 | REAL(wp) :: xcoef3 = 1.15E-4 * 14. / 55.85 / 7.625 * 0.5 |
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[935] | 51 | !!* Substitution |
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[1800] | 52 | # include "top_substitute.h90" |
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[935] | 53 | !!---------------------------------------------------------------------- |
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[2528] | 54 | !! NEMO/TOP 3.3 , NEMO Consortium (2010) |
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[1152] | 55 | !! $Id$ |
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[2528] | 56 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[935] | 57 | !!---------------------------------------------------------------------- |
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| 58 | |
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| 59 | CONTAINS |
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| 60 | |
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[2528] | 61 | SUBROUTINE p4z_lim( kt ) |
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[935] | 62 | !!--------------------------------------------------------------------- |
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| 63 | !! *** ROUTINE p4z_lim *** |
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| 64 | !! |
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| 65 | !! ** Purpose : Compute the co-limitations by the various nutrients |
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| 66 | !! for the various phytoplankton species |
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| 67 | !! |
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| 68 | !! ** Method : - ??? |
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| 69 | !!--------------------------------------------------------------------- |
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[3294] | 70 | ! |
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[2528] | 71 | INTEGER, INTENT(in) :: kt |
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[3294] | 72 | ! |
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[935] | 73 | INTEGER :: ji, jj, jk |
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| 74 | REAL(wp) :: zlim1, zlim2, zlim3, zlim4, zno3, zferlim |
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[3294] | 75 | REAL(wp) :: zconcd, zconcd2, zconcn, zconcn2 |
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| 76 | REAL(wp) :: z1_trndia, z1_trnphy, ztem1, ztem2, zetot1, zetot2 |
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| 77 | REAL(wp) :: zdenom, zratio, zironmin |
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| 78 | REAL(wp) :: zconc1d, zconc1dnh4, zconc0n, zconc0nnh4 |
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[935] | 79 | !!--------------------------------------------------------------------- |
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[3294] | 80 | ! |
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| 81 | IF( nn_timing == 1 ) CALL timing_start('p4z_lim') |
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| 82 | ! |
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[935] | 83 | DO jk = 1, jpkm1 |
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| 84 | DO jj = 1, jpj |
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| 85 | DO ji = 1, jpi |
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[3294] | 86 | |
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| 87 | ! Tuning of the iron concentration to a minimum level that is set to the detection limit |
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| 88 | !------------------------------------- |
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| 89 | zno3 = trn(ji,jj,jk,jpno3) / 40.e-6 |
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| 90 | zferlim = MAX( 2e-11 * zno3 * zno3, 5e-12 ) |
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| 91 | zferlim = MIN( zferlim, 3e-11 ) |
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[935] | 92 | trn(ji,jj,jk,jpfer) = MAX( trn(ji,jj,jk,jpfer), zferlim ) |
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| 93 | |
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[3294] | 94 | ! Computation of a variable Ks for iron on diatoms taking into account |
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| 95 | ! that increasing biomass is made of generally bigger cells |
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| 96 | !------------------------------------------------ |
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| 97 | zconcd = MAX( 0.e0 , trn(ji,jj,jk,jpdia) - xsizedia ) |
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| 98 | zconcd2 = trn(ji,jj,jk,jpdia) - zconcd |
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| 99 | zconcn = MAX( 0.e0 , trn(ji,jj,jk,jpphy) - xsizephy ) |
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| 100 | zconcn2 = trn(ji,jj,jk,jpphy) - zconcn |
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| 101 | z1_trnphy = 1. / ( trn(ji,jj,jk,jpphy) + rtrn ) |
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| 102 | z1_trndia = 1. / ( trn(ji,jj,jk,jpdia) + rtrn ) |
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[935] | 103 | |
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[3294] | 104 | concdfe(ji,jj,jk) = MAX( conc3 , ( zconcd2 * conc3 + conc3m * zconcd ) * z1_trndia ) |
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| 105 | zconc1d = MAX( 2.* conc0 , ( zconcd2 * 2. * conc0 + conc1 * zconcd ) * z1_trndia ) |
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| 106 | zconc1dnh4 = MAX( 2.* concnnh4, ( zconcd2 * 2. * concnnh4 + concdnh4 * zconcd ) * z1_trndia ) |
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[935] | 107 | |
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[3294] | 108 | concnfe(ji,jj,jk) = MAX( conc2 , ( zconcn2 * conc2 + conc2m * zconcn ) * z1_trnphy ) |
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| 109 | zconc0n = MAX( conc0 , ( zconcn2 * conc0 + 2. * conc0 * zconcn ) * z1_trnphy ) |
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| 110 | zconc0nnh4 = MAX( concnnh4 , ( zconcn2 * concnnh4 + 2. * concnnh4 * zconcn ) * z1_trnphy ) |
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[935] | 111 | |
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[3294] | 112 | ! Michaelis-Menten Limitation term for nutrients Small flagellates |
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| 113 | ! ----------------------------------------------- |
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| 114 | zdenom = 1. / ( zconc0n * zconc0nnh4 + zconc0nnh4 * trn(ji,jj,jk,jpno3) + zconc0n * trn(ji,jj,jk,jpnh4) ) |
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| 115 | xnanono3(ji,jj,jk) = trn(ji,jj,jk,jpno3) * zconc0nnh4 * zdenom |
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| 116 | xnanonh4(ji,jj,jk) = trn(ji,jj,jk,jpnh4) * zconc0n * zdenom |
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| 117 | ! |
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| 118 | zlim1 = xnanono3(ji,jj,jk) + xnanonh4(ji,jj,jk) |
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| 119 | zlim2 = trn(ji,jj,jk,jppo4) / ( trn(ji,jj,jk,jppo4) + zconc0nnh4 ) |
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| 120 | zratio = trn(ji,jj,jk,jpnfe) * z1_trnphy |
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| 121 | zironmin = xcoef1 * trn(ji,jj,jk,jpnch) * z1_trnphy + xcoef2 * zlim1 + xcoef3 * xnanono3(ji,jj,jk) |
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| 122 | zlim3 = MAX( 0.,( zratio - zironmin ) / qnfelim ) |
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| 123 | xlimnfe(ji,jj,jk) = MIN( 1., zlim3 ) |
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[935] | 124 | xlimphy(ji,jj,jk) = MIN( zlim1, zlim2, zlim3 ) |
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[3294] | 125 | ! |
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| 126 | zlim1 = trn(ji,jj,jk,jpnh4) / ( concnnh4 + trn(ji,jj,jk,jpnh4) ) |
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| 127 | zlim3 = trn(ji,jj,jk,jpfer) / ( concfebac+ trn(ji,jj,jk,jpfer) ) |
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| 128 | zlim4 = trn(ji,jj,jk,jpdoc) / ( xkdoc + trn(ji,jj,jk,jpdoc) ) |
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[935] | 129 | xlimbac(ji,jj,jk) = MIN( zlim1, zlim2, zlim3 ) * zlim4 |
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| 130 | |
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[3294] | 131 | ! Michaelis-Menten Limitation term for nutrients Diatoms |
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| 132 | ! ---------------------------------------------- |
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| 133 | zdenom = 1. / ( zconc1d * zconc1dnh4 + zconc1dnh4 * trn(ji,jj,jk,jpno3) + zconc1d * trn(ji,jj,jk,jpnh4) ) |
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| 134 | xdiatno3(ji,jj,jk) = trn(ji,jj,jk,jpno3) * zconc1dnh4 * zdenom |
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| 135 | xdiatnh4(ji,jj,jk) = trn(ji,jj,jk,jpnh4) * zconc1d * zdenom |
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| 136 | ! |
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| 137 | zlim1 = xdiatno3(ji,jj,jk) + xdiatnh4(ji,jj,jk) |
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| 138 | zlim2 = trn(ji,jj,jk,jppo4) / ( trn(ji,jj,jk,jppo4) + zconc1dnh4 ) |
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| 139 | zlim3 = trn(ji,jj,jk,jpsil) / ( trn(ji,jj,jk,jpsil) + xksi(ji,jj) ) |
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| 140 | zratio = trn(ji,jj,jk,jpdfe)/(trn(ji,jj,jk,jpdia)+rtrn) |
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| 141 | zironmin = xcoef1 * trn(ji,jj,jk,jpdch) * z1_trndia + xcoef2 * zlim1 + xcoef3 * xdiatno3(ji,jj,jk) |
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| 142 | zlim4 = MAX( 0., ( zratio - zironmin ) / qdfelim ) |
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| 143 | xlimdfe(ji,jj,jk) = MIN( 1., zlim4 ) |
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[935] | 144 | xlimdia(ji,jj,jk) = MIN( zlim1, zlim2, zlim3, zlim4 ) |
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[3294] | 145 | xlimsi(ji,jj,jk) = MIN( zlim1, zlim2, zlim4 ) |
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| 146 | END DO |
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[935] | 147 | END DO |
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| 148 | END DO |
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| 149 | |
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| 150 | ! Compute the fraction of nanophytoplankton that is made of calcifiers |
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| 151 | ! -------------------------------------------------------------------- |
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| 152 | DO jk = 1, jpkm1 |
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| 153 | DO jj = 1, jpj |
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| 154 | DO ji = 1, jpi |
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[3294] | 155 | zlim1 = ( trn(ji,jj,jk,jpno3) * concnnh4 + trn(ji,jj,jk,jpnh4) * conc0 ) & |
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| 156 | & / ( conc0 * concnnh4 + concnnh4 * trn(ji,jj,jk,jpno3) + conc0 * trn(ji,jj,jk,jpnh4) ) |
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| 157 | zlim2 = trn(ji,jj,jk,jppo4) / ( trn(ji,jj,jk,jppo4) + concnnh4 ) |
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| 158 | zlim3 = trn(ji,jj,jk,jpfer) / ( trn(ji,jj,jk,jpfer) + concfebac ) |
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| 159 | ztem1 = MAX( 0., tsn(ji,jj,jk,jp_tem) ) |
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| 160 | ztem2 = tsn(ji,jj,jk,jp_tem) - 10. |
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| 161 | zetot1 = MAX( 0., etot(ji,jj,jk) - 1.) / ( 4. + etot(ji,jj,jk) ) |
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| 162 | zetot2 = 1. / ( 30. + etot(ji,jj,jk) ) |
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| 163 | |
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| 164 | xfracal(ji,jj,jk) = caco3r * MIN( zlim1, zlim2, zlim3 ) & |
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| 165 | & * ztem1 / ( 0.1 + ztem1 ) & |
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| 166 | & * MAX( 1., trn(ji,jj,jk,jpphy) * 1.e6 / 2. ) & |
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| 167 | & * 2.325 * zetot1 * 30. * zetot2 & |
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| 168 | & * ( 1. + EXP(-ztem2 * ztem2 / 25. ) ) & |
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| 169 | & * MIN( 1., 50. / ( hmld(ji,jj) + rtrn ) ) |
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[935] | 170 | xfracal(ji,jj,jk) = MIN( 0.8 , xfracal(ji,jj,jk) ) |
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[3294] | 171 | xfracal(ji,jj,jk) = MAX( 0.02, xfracal(ji,jj,jk) ) |
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[935] | 172 | END DO |
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| 173 | END DO |
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| 174 | END DO |
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| 175 | ! |
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[3294] | 176 | IF( nn_timing == 1 ) CALL timing_stop('p4z_lim') |
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| 177 | ! |
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[935] | 178 | END SUBROUTINE p4z_lim |
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| 179 | |
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| 180 | SUBROUTINE p4z_lim_init |
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| 181 | |
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| 182 | !!---------------------------------------------------------------------- |
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| 183 | !! *** ROUTINE p4z_lim_init *** |
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| 184 | !! |
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| 185 | !! ** Purpose : Initialization of nutrient limitation parameters |
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| 186 | !! |
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[1119] | 187 | !! ** Method : Read the nampislim namelist and check the parameters |
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[3294] | 188 | !! called at the first timestep (nittrc000) |
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[935] | 189 | !! |
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[1119] | 190 | !! ** input : Namelist nampislim |
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[935] | 191 | !! |
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| 192 | !!---------------------------------------------------------------------- |
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| 193 | |
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[1119] | 194 | NAMELIST/nampislim/ conc0, conc1, conc2, conc2m, conc3, conc3m, & |
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[3294] | 195 | & xsizedia, xsizephy, concnnh4, concdnh4, & |
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| 196 | & xksi1, xksi2, xkdoc, concfebac, qnfelim, qdfelim, caco3r |
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[935] | 197 | |
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[3294] | 198 | REWIND( numnatp ) ! read numnat |
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| 199 | READ ( numnatp, nampislim ) |
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[935] | 200 | |
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| 201 | IF(lwp) THEN ! control print |
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| 202 | WRITE(numout,*) ' ' |
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[1119] | 203 | WRITE(numout,*) ' Namelist parameters for nutrient limitations, nampislim' |
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[935] | 204 | WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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[3294] | 205 | WRITE(numout,*) ' mean rainratio caco3r = ', caco3r |
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| 206 | WRITE(numout,*) ' NO3, PO4 half saturation conc0 = ', conc0 |
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| 207 | WRITE(numout,*) ' half saturation constant for Si uptake xksi1 = ', xksi1 |
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| 208 | WRITE(numout,*) ' half saturation constant for Si/C xksi2 = ', xksi2 |
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| 209 | WRITE(numout,*) ' 2nd half-sat. of DOC remineralization xkdoc = ', xkdoc |
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| 210 | WRITE(numout,*) ' Phosphate half saturation for diatoms conc1 = ', conc1 |
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| 211 | WRITE(numout,*) ' Iron half saturation for phyto conc2 = ', conc2 |
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| 212 | WRITE(numout,*) ' Max iron half saturation for phyto conc2m = ', conc2m |
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| 213 | WRITE(numout,*) ' Iron half saturation for diatoms conc3 = ', conc3 |
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| 214 | WRITE(numout,*) ' Maxi iron half saturation for diatoms conc3m = ', conc3m |
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| 215 | WRITE(numout,*) ' Minimum size criteria for diatoms xsizedia = ', xsizedia |
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| 216 | WRITE(numout,*) ' Minimum size criteria for nanophyto xsizephy = ', xsizephy |
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| 217 | WRITE(numout,*) ' NH4 half saturation for phyto concnnh4 = ', concnnh4 |
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| 218 | WRITE(numout,*) ' NH4 half saturation for diatoms concdnh4 = ', concdnh4 |
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| 219 | WRITE(numout,*) ' Fe half saturation for bacteria concfebac = ', concfebac |
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| 220 | WRITE(numout,*) ' optimal Fe quota for nano. qnfelim = ', qnfelim |
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| 221 | WRITE(numout,*) ' Optimal Fe quota for diatoms qdfelim = ', qdfelim |
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[935] | 222 | ENDIF |
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| 223 | |
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| 224 | END SUBROUTINE p4z_lim_init |
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| 225 | |
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| 226 | #else |
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| 227 | !!====================================================================== |
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| 228 | !! Dummy module : No PISCES bio-model |
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| 229 | !!====================================================================== |
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| 230 | CONTAINS |
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| 231 | SUBROUTINE p4z_lim ! Empty routine |
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| 232 | END SUBROUTINE p4z_lim |
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| 233 | #endif |
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| 234 | |
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| 235 | !!====================================================================== |
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| 236 | END MODULE p4zlim |
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