[8436] | 1 | MODULE asmlogchlbal_medusa |
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[8428] | 2 | !!====================================================================== |
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[8436] | 3 | !! *** MODULE asmlogchlbal_medusa *** |
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| 4 | !! Calculate increments to MEDUSA based on surface logchl increments |
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[8428] | 5 | !! |
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| 6 | !! IMPORTANT NOTE: This calls the bioanalysis routine of Hemmings et al. |
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| 7 | !! For licensing reasons this is kept in its own internal Met Office |
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| 8 | !! branch (dev/frdf/vn3.6_nitrogen_balancing) rather than in the Paris |
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| 9 | !! repository, and must be merged in when building. |
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| 10 | !! |
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| 11 | !!====================================================================== |
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[8436] | 12 | !! History : 3.6 ! 2017-08 (D. Ford) Adapted from asmlogchlbal_hadocc |
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[8428] | 13 | !!---------------------------------------------------------------------- |
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[8436] | 14 | #if defined key_asminc && defined key_medusa && defined key_foam_medusa |
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[8428] | 15 | !!---------------------------------------------------------------------- |
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| 16 | !! 'key_asminc' : assimilation increment interface |
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[8436] | 17 | !! 'key_medusa' : MEDUSA model |
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| 18 | !! 'key_foam_medusa' : MEDUSA extras for FOAM OBS and ASM |
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[8428] | 19 | !!---------------------------------------------------------------------- |
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[8436] | 20 | !! asm_logchl_bal_medusa : routine to calculate increments to MEDUSA |
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[8428] | 21 | !!---------------------------------------------------------------------- |
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| 22 | USE par_kind, ONLY: wp ! kind parameters |
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| 23 | USE par_oce, ONLY: jpi, jpj, jpk ! domain array sizes |
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| 24 | USE dom_oce, ONLY: gdepw_n ! domain information |
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| 25 | USE zdfmxl ! mixed layer depth |
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[8485] | 26 | USE zdftmx, ONLY: ln_tmx_itf, & ! Indonesian Throughflow |
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| 27 | & mask_itf ! tidal mixing mask |
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[8428] | 28 | USE iom ! i/o |
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[8436] | 29 | USE sms_medusa ! MEDUSA parameters |
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| 30 | USE par_medusa ! MEDUSA parameters |
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[8428] | 31 | USE par_trc, ONLY: jptra ! Tracer parameters |
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| 32 | USE bioanalysis ! Nitrogen balancing |
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| 33 | |
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| 34 | IMPLICIT NONE |
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| 35 | PRIVATE |
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| 36 | |
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[8436] | 37 | PUBLIC asm_logchl_bal_medusa |
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[8428] | 38 | |
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| 39 | ! Default values for biological assimilation parameters |
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| 40 | ! Should match Hemmings et al. (2008) |
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| 41 | REAL(wp), PARAMETER :: balnutext = 0.6 !: Default nutrient balancing factor |
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| 42 | REAL(wp), PARAMETER :: balnutmin = 0.1 !: Fraction of phytoplankton loss to nutrient |
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| 43 | REAL(wp), PARAMETER :: r = 1 !: Reliability of model specific growth rate |
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| 44 | REAL(wp), PARAMETER :: beta_g = 0.05 !: Low rate bias correction for growth rate estimator |
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| 45 | REAL(wp), PARAMETER :: beta_l = 0.05 !: Low rate bias correction for primary loss rate estimator |
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| 46 | REAL(wp), PARAMETER :: beta_m = 0.05 !: Low rate bias correction for secondary loss rate estimator |
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| 47 | REAL(wp), PARAMETER :: a_g = 0.2 !: Error s.d. for log10 of growth rate estimator |
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| 48 | REAL(wp), PARAMETER :: a_l = 0.4 !: Error s.d. for log10 of primary loss rate estimator |
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| 49 | REAL(wp), PARAMETER :: a_m = 0.7 !: Error s.d. for log10 of secondary loss rate estimator |
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| 50 | REAL(wp), PARAMETER :: zfracb0 = 0.7 !: Base zooplankton fraction of loss to Z & D |
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| 51 | REAL(wp), PARAMETER :: zfracb1 = 0 !: Phytoplankton sensitivity of zooplankton fraction |
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| 52 | REAL(wp), PARAMETER :: qrfmax = 1.1 !: Maximum nutrient limitation reduction factor |
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| 53 | REAL(wp), PARAMETER :: qafmax = 1.1 !: Maximum nutrient limitation amplification factor |
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| 54 | REAL(wp), PARAMETER :: zrfmax = 2 !: Maximum zooplankton reduction factor |
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| 55 | REAL(wp), PARAMETER :: zafmax = 2 !: Maximum zooplankton amplification factor |
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| 56 | REAL(wp), PARAMETER :: prfmax = 10 !: Maximum phytoplankton reduction factor (secondary) |
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| 57 | REAL(wp), PARAMETER :: incphymin = 0.0001 !: Minimum size of non-zero phytoplankton increment |
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| 58 | REAL(wp), PARAMETER :: integnstep = 20 !: Number of steps for p.d.f. integral evaluation |
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| 59 | REAL(wp), PARAMETER :: pthreshold = 0.01 !: Fractional threshold level for setting p.d.f. |
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| 60 | ! |
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| 61 | LOGICAL, PARAMETER :: diag_active = .TRUE. !: Depth-independent diagnostics |
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| 62 | LOGICAL, PARAMETER :: diag_fulldepth_active = .TRUE. !: Full-depth diagnostics |
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| 63 | LOGICAL, PARAMETER :: gl_active = .TRUE. !: Growth/loss-based balancing |
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| 64 | LOGICAL, PARAMETER :: nbal_active = .TRUE. !: Nitrogen balancing |
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| 65 | LOGICAL, PARAMETER :: subsurf_active = .TRUE. !: Increments below MLD |
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| 66 | LOGICAL, PARAMETER :: deepneg_active = .FALSE. !: Negative primary increments below MLD |
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| 67 | LOGICAL, PARAMETER :: deeppos_active = .FALSE. !: Positive primary increments below MLD |
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| 68 | LOGICAL, PARAMETER :: nutprof_active = .TRUE. !: Secondary increments |
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| 69 | |
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| 70 | CONTAINS |
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| 71 | |
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[8436] | 72 | SUBROUTINE asm_logchl_bal_medusa( logchl_bkginc, aincper, mld_choice_bgc, & |
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| 73 | & k_maxchlinc, ld_logchlbal, & |
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| 74 | & pgrow_avg_bkg, ploss_avg_bkg, & |
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| 75 | & phyt_avg_bkg, mld_max_bkg, & |
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[8440] | 76 | & tracer_bkg, logchl_balinc ) |
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[8428] | 77 | !!--------------------------------------------------------------------------- |
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[8436] | 78 | !! *** ROUTINE asm_logchl_bal_medusa *** |
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[8428] | 79 | !! |
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[8436] | 80 | !! ** Purpose : calculate increments to MEDUSA from logchl increments |
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[8428] | 81 | !! |
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| 82 | !! ** Method : convert logchl increments to chl increments |
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[8436] | 83 | !! average up MEDUSA to look like HadOCC |
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[8428] | 84 | !! call nitrogen balancing scheme |
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[8436] | 85 | !! separate back out to MEDUSA |
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[8428] | 86 | !! |
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| 87 | !! ** Action : populate logchl_balinc |
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| 88 | !! |
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| 89 | !! References : Hemmings et al., 2008, J. Mar. Res. |
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| 90 | !! Ford et al., 2012, Ocean Sci. |
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| 91 | !!--------------------------------------------------------------------------- |
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| 92 | !! |
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| 93 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: logchl_bkginc ! logchl increments |
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| 94 | REAL(wp), INTENT(in ) :: aincper ! Assimilation period |
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| 95 | INTEGER, INTENT(in ) :: mld_choice_bgc ! MLD criterion |
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| 96 | REAL(wp), INTENT(in ) :: k_maxchlinc ! Max chl increment |
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| 97 | LOGICAL, INTENT(in ) :: ld_logchlbal ! Balancing y/n |
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[8436] | 98 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: pgrow_avg_bkg ! Avg phyto growth |
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| 99 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: ploss_avg_bkg ! Avg phyto loss |
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| 100 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: phyt_avg_bkg ! Avg phyto |
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| 101 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: mld_max_bkg ! Max MLD |
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[8440] | 102 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj,jpk,jptra) :: tracer_bkg ! State variables |
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[8428] | 103 | REAL(wp), INTENT( out), DIMENSION(jpi,jpj,jpk,jptra) :: logchl_balinc ! Balancing increments |
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| 104 | !! |
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[8436] | 105 | INTEGER :: ji, jj, jk, jn ! Loop counters |
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[8428] | 106 | INTEGER :: jkmax ! Loop index |
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| 107 | INTEGER, DIMENSION(6) :: i_tracer ! Tracer indices |
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[8436] | 108 | REAL(wp) :: n2be_p ! N:biomass for total phy |
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| 109 | REAL(wp) :: n2be_z ! N:biomass for total zoo |
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| 110 | REAL(wp) :: n2be_d ! N:biomass for detritus |
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| 111 | REAL(wp) :: zfrac_chn ! Fraction of jpchn |
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| 112 | REAL(wp) :: zfrac_chd ! Fraction of jpchd |
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| 113 | REAL(wp) :: zfrac_phn ! Fraction of jpphn |
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| 114 | REAL(wp) :: zfrac_phd ! Fraction of jpphd |
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| 115 | REAL(wp) :: zfrac_zmi ! Fraction of jpzmi |
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| 116 | REAL(wp) :: zfrac_zme ! Fraction of jpzme |
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| 117 | REAL(wp) :: zrat_pds_phd ! Ratio of jppds:jpphd |
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| 118 | REAL(wp) :: zrat_chd_phd ! Ratio of jpchd:jpphd |
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| 119 | REAL(wp) :: zrat_chn_phn ! Ratio of jpchn:jpphn |
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| 120 | REAL(wp) :: zrat_dtc_det ! Ratio of jpdtc:jpdet |
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[8428] | 121 | REAL(wp), DIMENSION(jpi,jpj) :: chl_inc ! Chlorophyll increments |
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[8436] | 122 | REAL(wp), DIMENSION(jpi,jpj) :: medusa_chl ! MEDUSA total chlorophyll |
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| 123 | REAL(wp), DIMENSION(jpi,jpj) :: cchl_p ! C:Chl for total phy |
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[8428] | 124 | REAL(wp), DIMENSION(jpi,jpj) :: zmld ! Mixed layer depth |
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| 125 | REAL(wp), DIMENSION(16) :: modparm ! Model parameters |
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| 126 | REAL(wp), DIMENSION(20) :: assimparm ! Assimilation parameters |
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| 127 | REAL(wp), DIMENSION(jpi,jpj,jpk,6) :: bstate ! Background state |
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| 128 | REAL(wp), DIMENSION(jpi,jpj,jpk,6) :: outincs ! Balancing increments |
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| 129 | REAL(wp), DIMENSION(jpi,jpj,22) :: diag ! Depth-indep diagnostics |
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| 130 | REAL(wp), DIMENSION(jpi,jpj,jpk,22) :: diag_fulldepth ! Full-depth diagnostics |
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| 131 | !!--------------------------------------------------------------------------- |
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| 132 | |
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| 133 | ! Convert log10(chlorophyll) increment back to a chlorophyll increment |
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| 134 | ! In order to transform logchl incs to chl incs, need to account for model |
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| 135 | ! background, cannot simply do 10^logchl_bkginc. Need to: |
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| 136 | ! 1) Add logchl inc to log10(background) to get log10(analysis) |
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| 137 | ! 2) Take 10^log10(analysis) to get analysis |
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| 138 | ! 3) Subtract background from analysis to get chl incs |
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| 139 | ! If k_maxchlinc > 0 then cap total absolute chlorophyll increment at that value |
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[8440] | 140 | medusa_chl(:,:) = tracer_bkg(:,:,1,jpchn) + tracer_bkg(:,:,1,jpchd) |
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[8428] | 141 | DO jj = 1, jpj |
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| 142 | DO ji = 1, jpi |
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[8436] | 143 | IF ( medusa_chl(ji,jj) > 0.0 ) THEN |
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| 144 | chl_inc(ji,jj) = 10**( LOG10( medusa_chl(ji,jj) ) + logchl_bkginc(ji,jj) ) - medusa_chl(ji,jj) |
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[8428] | 145 | IF ( k_maxchlinc > 0.0 ) THEN |
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| 146 | chl_inc(ji,jj) = MAX( -1.0 * k_maxchlinc, MIN( chl_inc(ji,jj), k_maxchlinc ) ) |
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| 147 | ENDIF |
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| 148 | ELSE |
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| 149 | chl_inc(ji,jj) = 0.0 |
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| 150 | ENDIF |
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| 151 | END DO |
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| 152 | END DO |
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| 153 | |
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| 154 | ! Select mixed layer |
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| 155 | SELECT CASE( mld_choice_bgc ) |
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| 156 | CASE ( 1 ) ! Turbocline/mixing depth [W points] |
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| 157 | zmld(:,:) = hmld(:,:) |
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| 158 | CASE ( 2 ) ! Density criterion (0.01 kg/m^3 change from 10m) [W points] |
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| 159 | zmld(:,:) = hmlp(:,:) |
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| 160 | CASE ( 3 ) ! Kara MLD [Interpolated] |
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| 161 | #if defined key_karaml |
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| 162 | IF ( ln_kara ) THEN |
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| 163 | zmld(:,:) = hmld_kara(:,:) |
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| 164 | ELSE |
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| 165 | CALL ctl_stop( ' Kara mixed layer requested for LogChl assimilation,', & |
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| 166 | & ' but ln_kara=.false.' ) |
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| 167 | ENDIF |
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| 168 | #else |
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| 169 | CALL ctl_stop( ' Kara mixed layer requested for LogChl assimilation,', & |
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| 170 | & ' but is not defined' ) |
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| 171 | #endif |
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| 172 | CASE ( 4 ) ! Temperature criterion (0.2 K change from surface) [T points] |
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| 173 | !zmld(:,:) = hmld_tref(:,:) |
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| 174 | CALL ctl_stop( ' hmld_tref mixed layer requested for LogChl assimilation,', & |
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| 175 | & ' but is not available in this version' ) |
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| 176 | CASE ( 5 ) ! Density criterion (0.01 kg/m^3 change from 10m) [T points] |
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| 177 | zmld(:,:) = hmlpt(:,:) |
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| 178 | END SELECT |
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| 179 | |
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| 180 | IF ( ld_logchlbal ) THEN ! Nitrogen balancing |
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| 181 | |
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[8436] | 182 | ! Set up model parameters to be passed into Hemmings balancing routine. |
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| 183 | ! For now these are hardwired to the standard HadOCC parameter values |
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| 184 | ! (except C:N ratios) as this is what the scheme was developed for. |
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| 185 | ! Obviously, HadOCC and MEDUSA are rather different models, so this |
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| 186 | ! isn't ideal, but there's not always direct analogues between the two |
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| 187 | ! parameter sets, so it's the easiest way to get something running. |
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| 188 | ! In the longer term, some serious MarMOT-based development is required. |
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| 189 | modparm(1) = 0.1 ! grow_sat |
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| 190 | modparm(2) = 2.0 ! psmax |
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| 191 | modparm(3) = 0.845 ! par |
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| 192 | modparm(4) = 0.02 ! alpha |
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| 193 | modparm(5) = 0.05 ! resp_rate |
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| 194 | modparm(6) = 0.05 ! pmort_rate |
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| 195 | modparm(7) = 0.01 ! phyto_min |
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| 196 | modparm(8) = 0.05 ! z_mort_1 |
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| 197 | modparm(9) = 1.0 ! z_mort_2 |
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| 198 | modparm(10) = ( xthetapn + xthetapd ) / 2.0 ! c2n_p |
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| 199 | modparm(11) = ( xthetazmi + xthetazme ) / 2.0 ! c2n_z |
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| 200 | modparm(12) = xthetad ! c2n_d |
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| 201 | modparm(13) = 0.01 ! graze_threshold |
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| 202 | modparm(14) = 2.0 ! holling_coef |
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| 203 | modparm(15) = 0.5 ! graze_sat |
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| 204 | modparm(16) = 2.0 ! graze_max |
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[8428] | 205 | |
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| 206 | ! Set up assimilation parameters to be passed into balancing routine |
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| 207 | ! Not sure what assimparm(1) is meant to be, but it doesn't get used |
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| 208 | assimparm(2) = balnutext |
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| 209 | assimparm(3) = balnutmin |
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| 210 | assimparm(4) = r |
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| 211 | assimparm(5) = beta_g |
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| 212 | assimparm(6) = beta_l |
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| 213 | assimparm(7) = beta_m |
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| 214 | assimparm(8) = a_g |
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| 215 | assimparm(9) = a_l |
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| 216 | assimparm(10) = a_m |
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| 217 | assimparm(11) = zfracb0 |
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| 218 | assimparm(12) = zfracb1 |
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| 219 | assimparm(13) = qrfmax |
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| 220 | assimparm(14) = qafmax |
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| 221 | assimparm(15) = zrfmax |
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| 222 | assimparm(16) = zafmax |
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| 223 | assimparm(17) = prfmax |
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| 224 | assimparm(18) = incphymin |
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| 225 | assimparm(19) = integnstep |
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| 226 | assimparm(20) = pthreshold |
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| 227 | |
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| 228 | ! Set up external tracer indices array bstate |
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| 229 | i_tracer(1) = 1 ! nutrient |
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| 230 | i_tracer(2) = 2 ! phytoplankton |
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| 231 | i_tracer(3) = 3 ! zooplankton |
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| 232 | i_tracer(4) = 4 ! detritus |
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| 233 | i_tracer(5) = 5 ! DIC |
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| 234 | i_tracer(6) = 6 ! Alkalinity |
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| 235 | |
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| 236 | ! Set background state |
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[8440] | 237 | bstate(:,:,:,i_tracer(1)) = tracer_bkg(:,:,:,jpdin) |
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| 238 | bstate(:,:,:,i_tracer(2)) = tracer_bkg(:,:,:,jpphn) + tracer_bkg(:,:,:,jpphd) |
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| 239 | bstate(:,:,:,i_tracer(3)) = tracer_bkg(:,:,:,jpzmi) + tracer_bkg(:,:,:,jpzme) |
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| 240 | bstate(:,:,:,i_tracer(4)) = tracer_bkg(:,:,:,jpdet) |
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| 241 | bstate(:,:,:,i_tracer(5)) = tracer_bkg(:,:,:,jpdic) |
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| 242 | bstate(:,:,:,i_tracer(6)) = tracer_bkg(:,:,:,jpalk) |
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[8428] | 243 | |
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[8436] | 244 | ! Calculate carbon to chlorophyll ratio for combined phytoplankton |
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| 245 | ! and nitrogen to biomass equivalent for PZD |
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| 246 | ! Hardwire nitrogen mass to 14.01 for now as it doesn't seem to be set in MEDUSA |
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| 247 | cchl_p(:,:) = 0.0 |
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| 248 | DO jj = 1, jpj |
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| 249 | DO ji = 1, jpi |
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[8440] | 250 | IF ( ( tracer_bkg(ji,jj,1,jpchn) + tracer_bkg(ji,jj,1,jpchd ) ) .GT. 0.0 ) THEN |
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| 251 | cchl_p(ji,jj) = ( ( tracer_bkg(ji,jj,1,jpphn) * xthetapn ) + ( tracer_bkg(ji,jj,1,jpphd) * xthetapd ) ) / & |
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| 252 | & ( tracer_bkg(ji,jj,1,jpchn) + tracer_bkg(ji,jj,1,jpchd ) ) |
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[8436] | 253 | ENDIF |
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| 254 | END DO |
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| 255 | END DO |
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| 256 | n2be_p = 14.01 + ( xmassc * ( ( xthetapn + xthetapd ) / 2.0 ) ) |
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| 257 | n2be_z = 14.01 + ( xmassc * ( ( xthetazmi + xthetazme ) / 2.0 ) ) |
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| 258 | n2be_d = 14.01 + ( xmassc * xthetad ) |
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| 259 | |
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[8428] | 260 | ! Call nitrogen balancing routine |
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[8436] | 261 | CALL bio_analysis( jpi, jpj, jpk, gdepw_n(:,:,2:jpk), i_tracer, modparm, & |
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| 262 | & n2be_p, n2be_z, n2be_d, assimparm, & |
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| 263 | & INT(aincper), 1, INT(SUM(tmask,3)), tmask(:,:,:), & |
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| 264 | & zmld(:,:), mld_max_bkg(:,:), chl_inc(:,:), cchl_p(:,:), & |
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| 265 | & nbal_active, phyt_avg_bkg(:,:), & |
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| 266 | & gl_active, pgrow_avg_bkg(:,:), ploss_avg_bkg(:,:), & |
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| 267 | & subsurf_active, deepneg_active, & |
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| 268 | & deeppos_active, nutprof_active, & |
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| 269 | & bstate, outincs, & |
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| 270 | & diag_active, diag, & |
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[8428] | 271 | & diag_fulldepth_active, diag_fulldepth ) |
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[8436] | 272 | |
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| 273 | ! Loop over each grid point partioning the increments |
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| 274 | logchl_balinc(:,:,:,:) = 0.0 |
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| 275 | DO jk = 1, jpk |
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| 276 | DO jj = 1, jpj |
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| 277 | DO ji = 1, jpi |
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| 278 | |
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[8440] | 279 | IF ( ( tracer_bkg(ji,jj,jk,jpphn) > 0.0 ) .AND. ( tracer_bkg(ji,jj,jk,jpphd) > 0.0 ) ) THEN |
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[8436] | 280 | ! Phytoplankton nitrogen and silicate split up based on existing ratios |
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[8440] | 281 | zfrac_phn = tracer_bkg(ji,jj,jk,jpphn) / (tracer_bkg(ji,jj,jk,jpphn) + tracer_bkg(ji,jj,jk,jpphd)) |
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[8436] | 282 | zfrac_phd = 1.0 - zfrac_phn |
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[8440] | 283 | zrat_pds_phd = tracer_bkg(ji,jj,jk,jppds) / tracer_bkg(ji,jj,jk,jpphd) |
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[8436] | 284 | logchl_balinc(ji,jj,jk,jpphn) = outincs(ji,jj,jk,i_tracer(2)) * zfrac_phn |
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| 285 | logchl_balinc(ji,jj,jk,jpphd) = outincs(ji,jj,jk,i_tracer(2)) * zfrac_phd |
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| 286 | logchl_balinc(ji,jj,jk,jppds) = logchl_balinc(ji,jj,jk,jpphd) * zrat_pds_phd |
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| 287 | |
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| 288 | ! Chlorophyll split up based on existing ratios to phytoplankton nitrogen |
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| 289 | ! Not using chl_inc directly as it's only 2D |
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| 290 | ! This method should give same results at surface as splitting chl_inc would |
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[8440] | 291 | zrat_chn_phn = tracer_bkg(ji,jj,jk,jpchn) / tracer_bkg(ji,jj,jk,jpphn) |
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| 292 | zrat_chd_phd = tracer_bkg(ji,jj,jk,jpchd) / tracer_bkg(ji,jj,jk,jpphd) |
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[8436] | 293 | logchl_balinc(ji,jj,jk,jpchn) = logchl_balinc(ji,jj,jk,jpphn) * zrat_chn_phn |
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| 294 | logchl_balinc(ji,jj,jk,jpchd) = logchl_balinc(ji,jj,jk,jpphd) * zrat_chd_phd |
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| 295 | ENDIF |
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| 296 | |
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[8440] | 297 | IF ( ( tracer_bkg(ji,jj,jk,jpzmi) > 0.0 ) .AND. ( tracer_bkg(ji,jj,jk,jpzme) > 0.0 ) ) THEN |
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[8436] | 298 | ! Zooplankton nitrogen split up based on existing ratios |
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[8440] | 299 | zfrac_zmi = tracer_bkg(ji,jj,jk,jpzmi) / (tracer_bkg(ji,jj,jk,jpzmi) + tracer_bkg(ji,jj,jk,jpzme)) |
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[8436] | 300 | zfrac_zme = 1.0 - zfrac_zmi |
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| 301 | logchl_balinc(ji,jj,jk,jpzmi) = outincs(ji,jj,jk,i_tracer(3)) * zfrac_zmi |
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| 302 | logchl_balinc(ji,jj,jk,jpzme) = outincs(ji,jj,jk,i_tracer(3)) * zfrac_zme |
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| 303 | ENDIF |
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| 304 | |
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| 305 | ! Nitrogen nutrient straight from balancing scheme |
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| 306 | logchl_balinc(ji,jj,jk,jpdin) = outincs(ji,jj,jk,i_tracer(1)) |
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| 307 | |
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| 308 | ! Nitrogen detritus straight from balancing scheme |
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| 309 | logchl_balinc(ji,jj,jk,jpdet) = outincs(ji,jj,jk,i_tracer(4)) |
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| 310 | |
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| 311 | ! DIC straight from balancing scheme |
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| 312 | logchl_balinc(ji,jj,jk,jpdic) = outincs(ji,jj,jk,i_tracer(5)) |
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| 313 | |
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| 314 | ! Alkalinity straight from balancing scheme |
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| 315 | logchl_balinc(ji,jj,jk,jpalk) = outincs(ji,jj,jk,i_tracer(6)) |
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| 316 | |
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| 317 | ! Remove diatom silicate increment from nutrient silicate to conserve mass |
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[8440] | 318 | IF ( ( tracer_bkg(ji,jj,jk,jpsil) - logchl_balinc(ji,jj,jk,jppds) ) > 0.0 ) THEN |
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[8436] | 319 | logchl_balinc(ji,jj,jk,jpsil) = logchl_balinc(ji,jj,jk,jppds) * (-1.0) |
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| 320 | ENDIF |
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| 321 | |
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[8440] | 322 | IF ( ( tracer_bkg(ji,jj,jk,jpdet) > 0.0 ) .AND. ( tracer_bkg(ji,jj,jk,jpdtc) > 0.0 ) ) THEN |
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[8436] | 323 | ! Carbon detritus based on existing ratios |
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[8440] | 324 | zrat_dtc_det = tracer_bkg(ji,jj,jk,jpdtc) / tracer_bkg(ji,jj,jk,jpdet) |
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[8436] | 325 | logchl_balinc(ji,jj,jk,jpdtc) = logchl_balinc(ji,jj,jk,jpdet) * zrat_dtc_det |
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| 326 | ENDIF |
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| 327 | |
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| 328 | ! Do nothing with iron or oxygen for the time being |
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| 329 | logchl_balinc(ji,jj,jk,jpfer) = 0.0 |
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| 330 | logchl_balinc(ji,jj,jk,jpoxy) = 0.0 |
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| 331 | |
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| 332 | END DO |
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| 333 | END DO |
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| 334 | END DO |
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[8428] | 335 | |
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| 336 | ELSE ! No nitrogen balancing |
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| 337 | |
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[8436] | 338 | ! Initialise individual chlorophyll increments to zero |
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| 339 | logchl_balinc(:,:,:,jpchn) = 0.0 |
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| 340 | logchl_balinc(:,:,:,jpchd) = 0.0 |
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[8428] | 341 | |
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[8436] | 342 | ! Split up total surface chlorophyll increments |
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| 343 | DO jj = 1, jpj |
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| 344 | DO ji = 1, jpi |
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| 345 | IF ( medusa_chl(ji,jj) > 0.0 ) THEN |
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[8440] | 346 | zfrac_chn = tracer_bkg(ji,jj,1,jpchn) / medusa_chl(ji,jj) |
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[8436] | 347 | zfrac_chd = 1.0 - zfrac_chn |
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| 348 | logchl_balinc(ji,jj,1,jpchn) = chl_inc(ji,jj) * zfrac_chn |
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| 349 | logchl_balinc(ji,jj,1,jpchd) = chl_inc(ji,jj) * zfrac_chd |
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| 350 | ENDIF |
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| 351 | END DO |
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| 352 | END DO |
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[8428] | 353 | |
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| 354 | ! Propagate through mixed layer |
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| 355 | DO jj = 1, jpj |
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| 356 | DO ji = 1, jpi |
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| 357 | ! |
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| 358 | jkmax = jpk-1 |
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| 359 | DO jk = jpk-1, 1, -1 |
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| 360 | IF ( ( zmld(ji,jj) > gdepw_n(ji,jj,jk) ) .AND. & |
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| 361 | & ( zmld(ji,jj) <= gdepw_n(ji,jj,jk+1) ) ) THEN |
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| 362 | zmld(ji,jj) = gdepw_n(ji,jj,jk+1) |
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| 363 | jkmax = jk |
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| 364 | ENDIF |
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| 365 | END DO |
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| 366 | ! |
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| 367 | DO jk = 2, jkmax |
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[8436] | 368 | logchl_balinc(ji,jj,jk,jpchn) = logchl_balinc(ji,jj,1,jpchn) |
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| 369 | logchl_balinc(ji,jj,jk,jpchd) = logchl_balinc(ji,jj,1,jpchd) |
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[8428] | 370 | END DO |
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| 371 | ! |
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| 372 | END DO |
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| 373 | END DO |
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| 374 | |
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| 375 | ! Set other balancing increments to zero |
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[8436] | 376 | logchl_balinc(:,:,:,jpphn) = 0.0 |
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| 377 | logchl_balinc(:,:,:,jpphd) = 0.0 |
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| 378 | logchl_balinc(:,:,:,jppds) = 0.0 |
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| 379 | logchl_balinc(:,:,:,jpzmi) = 0.0 |
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| 380 | logchl_balinc(:,:,:,jpzme) = 0.0 |
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| 381 | logchl_balinc(:,:,:,jpdin) = 0.0 |
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| 382 | logchl_balinc(:,:,:,jpsil) = 0.0 |
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| 383 | logchl_balinc(:,:,:,jpfer) = 0.0 |
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| 384 | logchl_balinc(:,:,:,jpdet) = 0.0 |
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| 385 | logchl_balinc(:,:,:,jpdtc) = 0.0 |
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| 386 | logchl_balinc(:,:,:,jpdic) = 0.0 |
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| 387 | logchl_balinc(:,:,:,jpalk) = 0.0 |
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| 388 | logchl_balinc(:,:,:,jpoxy) = 0.0 |
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| 389 | |
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[8428] | 390 | ENDIF |
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[8485] | 391 | |
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| 392 | ! If performing extra tidal mixing in the Indonesian Throughflow, |
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| 393 | ! increments have been found to make the carbon cycle unstable |
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| 394 | ! Therefore, mask these out |
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| 395 | IF ( ln_tmx_itf ) THEN |
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| 396 | DO jn = 1, jptra |
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| 397 | DO jk = 1, jpk |
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| 398 | logchl_balinc(:,:,jk,jn) = logchl_balinc(:,:,jk,jn) * ( 1.0 - mask_itf(:,:) ) |
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| 399 | END DO |
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| 400 | END DO |
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| 401 | ENDIF |
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[8428] | 402 | |
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[8436] | 403 | END SUBROUTINE asm_logchl_bal_medusa |
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[8428] | 404 | |
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| 405 | #else |
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| 406 | !!---------------------------------------------------------------------- |
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| 407 | !! Default option : Empty routine |
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| 408 | !!---------------------------------------------------------------------- |
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| 409 | CONTAINS |
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[8436] | 410 | SUBROUTINE asm_logchl_bal_medusa( logchl_bkginc, aincper, mld_choice_bgc, & |
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[8440] | 411 | & k_maxchlinc, ld_logchlbal, & |
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| 412 | & pgrow_avg_bkg, ploss_avg_bkg, & |
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| 413 | & phyt_avg_bkg, mld_max_bkg, & |
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| 414 | & tracer_bkg, logchl_balinc ) |
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[8428] | 415 | REAL :: logchl_bkginc(:,:) |
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| 416 | REAL :: aincper |
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| 417 | INTEGER :: mld_choice_bgc |
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| 418 | REAL :: k_maxchlinc |
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[8440] | 419 | LOGICAL :: ld_logchlbal |
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| 420 | REAL :: pgrow_avg_bkg(:,:) |
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| 421 | REAL :: ploss_avg_bkg(:,:) |
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| 422 | REAL :: phyt_avg_bkg(:,:) |
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| 423 | REAL :: mld_max_bkg(:,:) |
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| 424 | REAL :: tracer_bkg(:,:,:,:) |
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| 425 | REAL :: logchl_balinc(:,:,:,:) |
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[8436] | 426 | WRITE(*,*) 'asm_logchl_bal_medusa: You should not have seen this print! error?' |
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| 427 | END SUBROUTINE asm_logchl_bal_medusa |
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[8428] | 428 | #endif |
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| 429 | |
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| 430 | !!====================================================================== |
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[8436] | 431 | END MODULE asmlogchlbal_medusa |
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