| [3443] | 1 | MODULE p4zfechem |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE p4zfechem *** |
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| 4 | !! TOP : PISCES Compute iron chemistry and scavenging |
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| 5 | !!====================================================================== |
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| [3461] | 6 | !! History : 3.5 ! 2012-07 (O. Aumont, A. Tagliabue, C. Ethe) Original code |
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| [3443] | 7 | !!---------------------------------------------------------------------- |
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| 8 | #if defined key_pisces |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! 'key_top' and TOP models |
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| 11 | !! 'key_pisces' PISCES bio-model |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! p4z_fechem : Compute remineralization/scavenging of iron |
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| 14 | !! p4z_fechem_init : Initialisation of parameters for remineralisation |
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| 15 | !! p4z_fechem_alloc : Allocate remineralisation variables |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | USE oce_trc ! shared variables between ocean and passive tracers |
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| 18 | USE trc ! passive tracers common variables |
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| 19 | USE sms_pisces ! PISCES Source Minus Sink variables |
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| 20 | USE p4zopt ! optical model |
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| 21 | USE p4zche ! chemical model |
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| 22 | USE p4zsbc ! Boundary conditions from sediments |
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| 23 | USE prtctl_trc ! print control for debugging |
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| 24 | USE iom ! I/O manager |
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| 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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| 29 | PUBLIC p4z_fechem ! called in p4zbio.F90 |
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| 30 | PUBLIC p4z_fechem_init ! called in trcsms_pisces.F90 |
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| 31 | |
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| 32 | !! * Shared module variables |
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| [4147] | 33 | LOGICAL :: ln_fechem !: boolean for complex iron chemistry following Tagliabue and voelker |
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| 34 | LOGICAL :: ln_ligvar !: boolean for variable ligand concentration following Tagliabue and voelker |
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| 35 | REAL(wp), PUBLIC :: xlam1 !: scavenging rate of Iron |
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| 36 | REAL(wp), PUBLIC :: xlamdust !: scavenging rate of Iron by dust |
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| 37 | REAL(wp), PUBLIC :: ligand !: ligand concentration in the ocean |
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| [3443] | 38 | |
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| [3446] | 39 | REAL(wp) :: kl1, kl2, kb1, kb2, ks, kpr, spd, con, kth |
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| [3443] | 40 | |
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| [6041] | 41 | !! * Substitutions |
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| 42 | # include "domzgr_substitute.h90" |
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| [3443] | 43 | !!---------------------------------------------------------------------- |
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| 44 | !! NEMO/TOP 3.3 , NEMO Consortium (2010) |
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| 45 | !! $Id: p4zrem.F90 3160 2011-11-20 14:27:18Z cetlod $ |
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| 46 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 47 | !!---------------------------------------------------------------------- |
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| 48 | CONTAINS |
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| 49 | |
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| [5385] | 50 | SUBROUTINE p4z_fechem( kt, knt ) |
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| [3443] | 51 | !!--------------------------------------------------------------------- |
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| 52 | !! *** ROUTINE p4z_fechem *** |
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| 53 | !! |
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| 54 | !! ** Purpose : Compute remineralization/scavenging of iron |
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| 55 | !! |
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| 56 | !! ** Method : 2 different chemistry models are available for iron |
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| 57 | !! (1) The simple chemistry model of Aumont and Bopp (2006) |
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| 58 | !! based on one ligand and one inorganic form |
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| 59 | !! (2) The complex chemistry model of Tagliabue and |
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| 60 | !! Voelker (2009) based on 2 ligands, 2 inorganic forms |
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| 61 | !! and one particulate form (ln_fechem) |
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| 62 | !!--------------------------------------------------------------------- |
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| 63 | ! |
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| [5385] | 64 | INTEGER, INTENT(in) :: kt, knt ! ocean time step |
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| [3443] | 65 | ! |
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| 66 | INTEGER :: ji, jj, jk, jic |
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| [3446] | 67 | REAL(wp) :: zdep, zlam1a, zlam1b, zlamfac |
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| 68 | REAL(wp) :: zkeq, zfeequi, zfesatur, zfecoll |
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| 69 | REAL(wp) :: zdenom1, zscave, zaggdfea, zaggdfeb, zcoag |
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| [3443] | 70 | REAL(wp) :: ztrc, zdust |
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| 71 | #if ! defined key_kriest |
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| 72 | REAL(wp) :: zdenom, zdenom2 |
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| 73 | #endif |
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| 74 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zTL1, zFe3, ztotlig |
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| 75 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zFeL1, zFeL2, zTL2, zFe2, zFeP |
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| [3446] | 76 | REAL(wp) :: zkox, zkph1, zkph2, zph, zionic, ztligand |
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| [3443] | 77 | REAL(wp) :: za, zb, zc, zkappa1, zkappa2, za0, za1, za2 |
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| 78 | REAL(wp) :: zxs, zfunc, zp, zq, zd, zr, zphi, zfff, zp3, zq2 |
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| 79 | REAL(wp) :: ztfe, zoxy |
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| 80 | REAL(wp) :: zstep |
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| 81 | CHARACTER (len=25) :: charout |
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| 82 | !!--------------------------------------------------------------------- |
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| 83 | ! |
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| 84 | IF( nn_timing == 1 ) CALL timing_start('p4z_fechem') |
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| 85 | ! |
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| 86 | ! Allocate temporary workspace |
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| [3531] | 87 | CALL wrk_alloc( jpi, jpj, jpk, zFe3, zFeL1, zTL1, ztotlig ) |
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| 88 | zFe3 (:,:,:) = 0. |
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| 89 | zFeL1(:,:,:) = 0. |
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| 90 | zTL1 (:,:,:) = 0. |
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| 91 | IF( ln_fechem ) THEN |
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| 92 | CALL wrk_alloc( jpi, jpj, jpk, zFe2, zFeL2, zTL2, zFeP ) |
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| 93 | zFe2 (:,:,:) = 0. |
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| 94 | zFeL2(:,:,:) = 0. |
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| 95 | zTL2 (:,:,:) = 0. |
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| 96 | zFeP (:,:,:) = 0. |
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| 97 | ENDIF |
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| [3461] | 98 | |
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| [3443] | 99 | ! Total ligand concentration : Ligands can be chosen to be constant or variable |
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| 100 | ! Parameterization from Tagliabue and Voelker (2011) |
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| 101 | ! ------------------------------------------------- |
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| 102 | IF( ln_ligvar ) THEN |
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| [5385] | 103 | ztotlig(:,:,:) = 0.09 * trb(:,:,:,jpdoc) * 1E6 + ligand * 1E9 |
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| [3446] | 104 | ztotlig(:,:,:) = MIN( ztotlig(:,:,:), 10. ) |
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| [3443] | 105 | ELSE |
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| 106 | ztotlig(:,:,:) = ligand * 1E9 |
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| 107 | ENDIF |
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| 108 | |
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| 109 | IF( ln_fechem ) THEN |
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| 110 | ! ------------------------------------------------------------ |
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| 111 | ! NEW FE CHEMISTRY ROUTINE from Tagliabue and Volker (2009) |
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| 112 | ! This model is based on two ligands, Fe2+, Fe3+ and Fep |
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| 113 | ! Chemistry is supposed to be fast enough to be at equilibrium |
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| 114 | ! ------------------------------------------------------------ |
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| 115 | DO jk = 1, jpkm1 |
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| 116 | DO jj = 1, jpj |
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| 117 | DO ji = 1, jpi |
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| [3461] | 118 | ! Calculate ligand concentrations : assume 2/3rd of excess goes to |
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| 119 | ! strong ligands (L1) and 1/3rd to weak ligands (L2) |
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| [3446] | 120 | ztligand = ztotlig(ji,jj,jk) - ligand * 1E9 |
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| [3461] | 121 | zTL1(ji,jj,jk) = 0.000001 + 0.67 * ztligand |
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| 122 | zTL2(ji,jj,jk) = ligand * 1E9 - 0.000001 + 0.33 * ztligand |
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| [3443] | 123 | ! ionic strength from Millero et al. 1987 |
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| 124 | zionic = 19.9201 * tsn(ji,jj,jk,jp_sal) / ( 1000. - 1.00488 * tsn(ji,jj,jk,jp_sal) + rtrn ) |
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| 125 | zph = -LOG10( MAX( hi(ji,jj,jk), rtrn) ) |
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| [5385] | 126 | zoxy = trb(ji,jj,jk,jpoxy) * ( rhop(ji,jj,jk) / 1.e3 ) |
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| [3461] | 127 | ! Fe2+ oxydation rate from Santana-Casiano et al. (2005) |
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| [4153] | 128 | zkox = 35.407 - 6.7109 * zph + 0.5342 * zph * zph - 5362.6 / ( tsn(ji,jj,jk,jp_tem) + 273.15 ) & |
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| [3461] | 129 | & - 0.04406 * SQRT( tsn(ji,jj,jk,jp_sal) ) - 0.002847 * tsn(ji,jj,jk,jp_sal) |
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| 130 | zkox = ( 10.** zkox ) * spd |
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| 131 | zkox = zkox * MAX( 1.e-6, zoxy) / ( chemo2(ji,jj,jk) + rtrn ) |
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| [3443] | 132 | ! PHOTOREDUCTION of complexed iron : Tagliabue and Arrigo (2006) |
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| [3461] | 133 | zkph2 = MAX( 0., 15. * etot(ji,jj,jk) / ( etot(ji,jj,jk) + 2. ) ) |
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| 134 | zkph1 = zkph2 / 5. |
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| [3443] | 135 | ! pass the dfe concentration from PISCES |
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| [5385] | 136 | ztfe = trb(ji,jj,jk,jpfer) * 1e9 |
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| [3443] | 137 | ! ---------------------------------------------------------- |
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| 138 | ! ANALYTICAL SOLUTION OF ROOTS OF THE FE3+ EQUATION |
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| 139 | ! As shown in Tagliabue and Voelker (2009), Fe3+ is the root of a 3rd order polynom. |
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| 140 | ! ---------------------------------------------------------- |
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| 141 | ! calculate some parameters |
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| 142 | za = 1 + ks / kpr |
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| [3446] | 143 | zb = 1 + ( zkph1 + kth ) / ( zkox + rtrn ) |
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| [3443] | 144 | zc = 1 + zkph2 / ( zkox + rtrn ) |
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| [3446] | 145 | zkappa1 = ( kb1 + zkph1 + kth ) / kl1 |
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| 146 | zkappa2 = ( kb2 + zkph2 ) / kl2 |
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| [3443] | 147 | za2 = zTL1(ji,jj,jk) * zb / za + zTL2(ji,jj,jk) * zc / za + zkappa1 + zkappa2 - ztfe / za |
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| 148 | za1 = zkappa2 * zTL1(ji,jj,jk) * zb / za + zkappa1 * zTL2(ji,jj,jk) * zc / za & |
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| 149 | & + zkappa1 * zkappa2 - ( zkappa1 + zkappa2 ) * ztfe / za |
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| 150 | za0 = -zkappa1 * zkappa2 * ztfe / za |
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| 151 | zp = za1 - za2 * za2 / 3. |
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| 152 | zq = za2 * za2 * za2 * 2. / 27. - za2 * za1 / 3. + za0 |
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| 153 | zp3 = zp / 3. |
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| 154 | zq2 = zq / 2. |
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| 155 | zd = zp3 * zp3 * zp3 + zq2 * zq2 |
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| 156 | zr = zq / ABS( zq ) * SQRT( ABS( zp ) / 3. ) |
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| 157 | ! compute the roots |
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| 158 | IF( zp > 0.) THEN |
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| [3450] | 159 | ! zphi = ASINH( zq / ( 2. * zr * zr * zr ) ) |
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| 160 | zphi = zq / ( 2. * zr * zr * zr ) |
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| [3461] | 161 | zphi = LOG( zphi + SQRT( zphi * zphi + 1 ) ) ! asinh(x) = log(x + sqrt(x^2+1)) |
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| [3443] | 162 | zxs = -2. * zr * SINH( zphi / 3. ) - za1 / 3. |
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| 163 | ELSE |
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| 164 | IF( zd > 0. ) THEN |
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| 165 | zfff = MAX( 1., zq / ( 2. * zr * zr * zr ) ) |
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| [3461] | 166 | ! zphi = ACOSH( zfff ) |
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| 167 | zphi = LOG( zfff + SQRT( zfff * zfff - 1 ) ) ! acosh(x) = log(x + sqrt(x^2-1)) |
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| [3443] | 168 | zxs = -2. * zr * COSH( zphi / 3. ) - za1 / 3. |
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| 169 | ELSE |
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| [3461] | 170 | zfff = MIN( 1., zq / ( 2. * zr * zr * zr ) ) |
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| [3456] | 171 | zphi = ACOS( zfff ) |
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| [3443] | 172 | DO jic = 1, 3 |
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| 173 | zfunc = -2 * zr * COS( zphi / 3. + 2. * FLOAT( jic - 1 ) * rpi / 3. ) - za2 / 3. |
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| 174 | IF( zfunc > 0. .AND. zfunc <= ztfe) zxs = zfunc |
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| 175 | END DO |
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| 176 | ENDIF |
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| 177 | ENDIF |
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| 178 | ! solve for the other Fe species |
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| 179 | zFe3(ji,jj,jk) = MAX( 0., zxs ) |
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| 180 | zFep(ji,jj,jk) = MAX( 0., ( ks * zFe3(ji,jj,jk) / kpr ) ) |
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| [3448] | 181 | zkappa2 = ( kb2 + zkph2 ) / kl2 |
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| 182 | zFeL2(ji,jj,jk) = MAX( 0., ( zFe3(ji,jj,jk) * zTL2(ji,jj,jk) ) / ( zkappa2 + zFe3(ji,jj,jk) ) ) |
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| 183 | zFeL1(ji,jj,jk) = MAX( 0., ( ztfe / zb - za / zb * zFe3(ji,jj,jk) - zc / zb * zFeL2(ji,jj,jk) ) ) |
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| 184 | zFe2 (ji,jj,jk) = MAX( 0., ( ( zkph1 * zFeL1(ji,jj,jk) + zkph2 * zFeL2(ji,jj,jk) ) / zkox ) ) |
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| [3443] | 185 | END DO |
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| 186 | END DO |
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| 187 | END DO |
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| 188 | ELSE |
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| 189 | ! ------------------------------------------------------------ |
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| 190 | ! OLD FE CHEMISTRY ROUTINE from Aumont and Bopp (2006) |
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| 191 | ! This model is based on one ligand and Fe' |
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| 192 | ! Chemistry is supposed to be fast enough to be at equilibrium |
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| 193 | ! ------------------------------------------------------------ |
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| 194 | DO jk = 1, jpkm1 |
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| 195 | DO jj = 1, jpj |
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| 196 | DO ji = 1, jpi |
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| 197 | zTL1(ji,jj,jk) = ztotlig(ji,jj,jk) |
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| 198 | zkeq = fekeq(ji,jj,jk) |
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| 199 | zfesatur = zTL1(ji,jj,jk) * 1E-9 |
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| [5385] | 200 | ztfe = trb(ji,jj,jk,jpfer) |
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| [3443] | 201 | ! Fe' is the root of a 2nd order polynom |
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| [3448] | 202 | zFe3 (ji,jj,jk) = ( -( 1. + zfesatur * zkeq - zkeq * ztfe ) & |
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| [3443] | 203 | & + SQRT( ( 1. + zfesatur * zkeq - zkeq * ztfe )**2 & |
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| 204 | & + 4. * ztfe * zkeq) ) / ( 2. * zkeq ) |
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| [3448] | 205 | zFe3 (ji,jj,jk) = zFe3(ji,jj,jk) * 1E9 |
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| [5385] | 206 | zFeL1(ji,jj,jk) = MAX( 0., trb(ji,jj,jk,jpfer) * 1E9 - zFe3(ji,jj,jk) ) |
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| [3443] | 207 | END DO |
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| 208 | END DO |
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| 209 | END DO |
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| 210 | ! |
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| 211 | ENDIF |
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| [6041] | 212 | ! |
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| [3531] | 213 | zdust = 0. ! if no dust available |
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| [6041] | 214 | ! |
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| [3443] | 215 | DO jk = 1, jpkm1 |
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| 216 | DO jj = 1, jpj |
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| 217 | DO ji = 1, jpi |
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| 218 | zstep = xstep |
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| 219 | # if defined key_degrad |
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| 220 | zstep = zstep * facvol(ji,jj,jk) |
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| 221 | # endif |
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| 222 | ! Scavenging rate of iron. This scavenging rate depends on the load of particles of sea water. |
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| 223 | ! This parameterization assumes a simple second order kinetics (k[Particles][Fe]). |
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| 224 | ! Scavenging onto dust is also included as evidenced from the DUNE experiments. |
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| 225 | ! -------------------------------------------------------------------------------------- |
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| [3446] | 226 | IF( ln_fechem ) THEN |
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| [4521] | 227 | zfeequi = ( zFe3(ji,jj,jk) + zFe2(ji,jj,jk) + zFeP(ji,jj,jk) ) * 1E-9 |
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| [3446] | 228 | zfecoll = ( 0.3 * zFeL1(ji,jj,jk) + 0.5 * zFeL2(ji,jj,jk) ) * 1E-9 |
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| 229 | ELSE |
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| 230 | zfeequi = zFe3(ji,jj,jk) * 1E-9 |
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| 231 | zfecoll = 0.5 * zFeL1(ji,jj,jk) * 1E-9 |
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| 232 | ENDIF |
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| [3443] | 233 | #if defined key_kriest |
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| [5385] | 234 | ztrc = ( trb(ji,jj,jk,jppoc) + trb(ji,jj,jk,jpcal) + trb(ji,jj,jk,jpgsi) ) * 1.e6 |
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| [3443] | 235 | #else |
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| [5385] | 236 | ztrc = ( trb(ji,jj,jk,jppoc) + trb(ji,jj,jk,jpgoc) + trb(ji,jj,jk,jpcal) + trb(ji,jj,jk,jpgsi) ) * 1.e6 |
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| [3443] | 237 | #endif |
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| [4800] | 238 | IF( ln_dust ) zdust = dust(ji,jj) / ( wdust / rday ) * tmask(ji,jj,jk) ! dust in kg/m2/s |
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| [3443] | 239 | zlam1b = 3.e-5 + xlamdust * zdust + xlam1 * ztrc |
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| 240 | zscave = zfeequi * zlam1b * zstep |
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| 241 | |
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| 242 | ! Compute the different ratios for scavenging of iron |
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| 243 | ! to later allocate scavenged iron to the different organic pools |
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| 244 | ! --------------------------------------------------------- |
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| [5385] | 245 | zdenom1 = xlam1 * trb(ji,jj,jk,jppoc) / zlam1b |
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| [3780] | 246 | #if ! defined key_kriest |
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| [5385] | 247 | zdenom2 = xlam1 * trb(ji,jj,jk,jpgoc) / zlam1b |
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| [3443] | 248 | #endif |
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| 249 | |
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| 250 | ! Increased scavenging for very high iron concentrations found near the coasts |
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| 251 | ! due to increased lithogenic particles and let say it is unknown processes (precipitation, ...) |
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| 252 | ! ----------------------------------------------------------- |
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| [3475] | 253 | zlamfac = MAX( 0.e0, ( gphit(ji,jj) + 55.) / 30. ) |
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| 254 | zlamfac = MIN( 1. , zlamfac ) |
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| 255 | zdep = MIN( 1., 1000. / fsdept(ji,jj,jk) ) |
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| [5385] | 256 | zlam1b = xlam1 * MAX( 0.e0, ( trb(ji,jj,jk,jpfer) * 1.e9 - ztotlig(ji,jj,jk) ) ) |
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| 257 | zcoag = zfeequi * zlam1b * zstep + 1E-4 * ( 1. - zlamfac ) * zdep * zstep * trb(ji,jj,jk,jpfer) |
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| [3443] | 258 | |
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| 259 | ! Compute the coagulation of colloidal iron. This parameterization |
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| 260 | ! could be thought as an equivalent of colloidal pumping. |
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| 261 | ! It requires certainly some more work as it is very poorly constrained. |
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| 262 | ! ---------------------------------------------------------------- |
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| [5385] | 263 | zlam1a = ( 0.369 * 0.3 * trb(ji,jj,jk,jpdoc) + 102.4 * trb(ji,jj,jk,jppoc) ) * xdiss(ji,jj,jk) & |
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| 264 | & + ( 114. * 0.3 * trb(ji,jj,jk,jpdoc) + 5.09E3 * trb(ji,jj,jk,jppoc) ) |
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| [3475] | 265 | zaggdfea = zlam1a * zstep * zfecoll |
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| [3443] | 266 | #if defined key_kriest |
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| [3446] | 267 | zaggdfeb = 0. |
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| 268 | ! |
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| 269 | tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) - zscave - zaggdfea - zaggdfeb - zcoag |
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| 270 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + zscave * zdenom1 + zaggdfea + zaggdfeb |
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| [3443] | 271 | #else |
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| [5385] | 272 | zlam1b = 3.53E3 * trb(ji,jj,jk,jpgoc) * xdiss(ji,jj,jk) |
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| [3446] | 273 | zaggdfeb = zlam1b * zstep * zfecoll |
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| 274 | ! |
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| 275 | tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) - zscave - zaggdfea - zaggdfeb - zcoag |
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| 276 | tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + zscave * zdenom1 + zaggdfea |
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| 277 | tra(ji,jj,jk,jpbfe) = tra(ji,jj,jk,jpbfe) + zscave * zdenom2 + zaggdfeb |
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| [3443] | 278 | #endif |
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| 279 | END DO |
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| 280 | END DO |
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| 281 | END DO |
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| 282 | ! |
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| [3446] | 283 | ! Define the bioavailable fraction of iron |
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| 284 | ! ---------------------------------------- |
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| 285 | IF( ln_fechem ) THEN |
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| [5385] | 286 | biron(:,:,:) = MAX( 0., trb(:,:,:,jpfer) - zFeP(:,:,:) * 1E-9 ) |
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| [3446] | 287 | ELSE |
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| [5385] | 288 | biron(:,:,:) = trb(:,:,:,jpfer) |
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| [3446] | 289 | ENDIF |
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| [3443] | 290 | |
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| 291 | ! Output of some diagnostics variables |
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| 292 | ! --------------------------------- |
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| [5385] | 293 | IF( lk_iomput .AND. knt == nrdttrc ) THEN |
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| [4996] | 294 | IF( iom_use("Fe3") ) CALL iom_put("Fe3" , zFe3 (:,:,:) * tmask(:,:,:) ) ! Fe3+ |
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| 295 | IF( iom_use("FeL1") ) CALL iom_put("FeL1" , zFeL1 (:,:,:) * tmask(:,:,:) ) ! FeL1 |
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| 296 | IF( iom_use("TL1") ) CALL iom_put("TL1" , zTL1 (:,:,:) * tmask(:,:,:) ) ! TL1 |
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| 297 | IF( iom_use("Totlig") ) CALL iom_put("Totlig" , ztotlig(:,:,:) * tmask(:,:,:) ) ! TL |
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| 298 | IF( iom_use("Biron") ) CALL iom_put("Biron" , biron (:,:,:) * 1e9 * tmask(:,:,:) ) ! biron |
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| 299 | IF( ln_fechem ) THEN |
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| 300 | IF( iom_use("Fe2") ) CALL iom_put("Fe2" , zFe2 (:,:,:) * tmask(:,:,:) ) ! Fe2+ |
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| 301 | IF( iom_use("FeL2") ) CALL iom_put("FeL2" , zFeL2 (:,:,:) * tmask(:,:,:) ) ! FeL2 |
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| 302 | IF( iom_use("FeP") ) CALL iom_put("FeP" , zFeP (:,:,:) * tmask(:,:,:) ) ! FeP |
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| 303 | IF( iom_use("TL2") ) CALL iom_put("TL2" , zTL2 (:,:,:) * tmask(:,:,:) ) ! TL2 |
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| [3443] | 304 | ENDIF |
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| 305 | ENDIF |
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| 306 | |
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| 307 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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| [3449] | 308 | WRITE(charout, FMT="('fechem')") |
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| [3443] | 309 | CALL prt_ctl_trc_info(charout) |
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| 310 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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| 311 | ENDIF |
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| 312 | ! |
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| [3448] | 313 | CALL wrk_dealloc( jpi, jpj, jpk, zFe3, zFeL1, zTL1, ztotlig ) |
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| 314 | IF( ln_fechem ) CALL wrk_dealloc( jpi, jpj, jpk, zFe2, zFeL2, zTL2, zFeP ) |
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| [3443] | 315 | ! |
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| 316 | IF( nn_timing == 1 ) CALL timing_stop('p4z_fechem') |
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| 317 | ! |
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| 318 | END SUBROUTINE p4z_fechem |
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| 319 | |
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| 320 | |
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| 321 | SUBROUTINE p4z_fechem_init |
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| 322 | !!---------------------------------------------------------------------- |
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| 323 | !! *** ROUTINE p4z_fechem_init *** |
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| 324 | !! |
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| 325 | !! ** Purpose : Initialization of iron chemistry parameters |
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| 326 | !! |
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| 327 | !! ** Method : Read the nampisfer namelist and check the parameters |
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| 328 | !! called at the first timestep |
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| 329 | !! |
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| 330 | !! ** input : Namelist nampisfer |
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| 331 | !! |
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| 332 | !!---------------------------------------------------------------------- |
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| 333 | NAMELIST/nampisfer/ ln_fechem, ln_ligvar, xlam1, xlamdust, ligand |
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| [4147] | 334 | INTEGER :: ios ! Local integer output status for namelist read |
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| [3443] | 335 | |
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| [4147] | 336 | REWIND( numnatp_ref ) ! Namelist nampisfer in reference namelist : Pisces iron chemistry |
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| 337 | READ ( numnatp_ref, nampisfer, IOSTAT = ios, ERR = 901) |
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| 338 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampisfer in reference namelist', lwp ) |
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| [3443] | 339 | |
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| [4147] | 340 | REWIND( numnatp_cfg ) ! Namelist nampisfer in configuration namelist : Pisces iron chemistry |
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| 341 | READ ( numnatp_cfg, nampisfer, IOSTAT = ios, ERR = 902 ) |
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| 342 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nampisfer in configuration namelist', lwp ) |
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| [4624] | 343 | IF(lwm) WRITE ( numonp, nampisfer ) |
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| [4147] | 344 | |
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| [3443] | 345 | IF(lwp) THEN ! control print |
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| 346 | WRITE(numout,*) ' ' |
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| 347 | WRITE(numout,*) ' Namelist parameters for Iron chemistry, nampisfer' |
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| 348 | WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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| 349 | WRITE(numout,*) ' enable complex iron chemistry scheme ln_fechem =', ln_fechem |
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| 350 | WRITE(numout,*) ' variable concentration of ligand ln_ligvar =', ln_ligvar |
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| 351 | WRITE(numout,*) ' scavenging rate of Iron xlam1 =', xlam1 |
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| 352 | WRITE(numout,*) ' scavenging rate of Iron by dust xlamdust =', xlamdust |
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| 353 | WRITE(numout,*) ' ligand concentration in the ocean ligand =', ligand |
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| 354 | ENDIF |
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| 355 | ! |
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| 356 | IF( ln_fechem ) THEN |
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| 357 | ! initialization of some constants used by the complexe chemistry scheme |
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| 358 | ! ---------------------------------------------------------------------- |
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| [3446] | 359 | spd = 3600. * 24. |
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| [3443] | 360 | con = 1.E9 |
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| 361 | ! LIGAND KINETICS (values from Witter et al. 2000) |
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| [3461] | 362 | ! Weak (L2) ligands |
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| 363 | ! Phaeophytin |
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| 364 | kl2 = 12.2E5 * spd / con |
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| 365 | kb2 = 12.3E-6 * spd |
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| 366 | ! Strong (L1) ligands |
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| 367 | ! Saccharides |
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| 368 | ! kl1 = 12.2E5 * spd / con |
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| 369 | ! kb1 = 12.3E-6 * spd |
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| 370 | ! DFOB- |
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| 371 | kl1 = 19.6e5 * spd / con |
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| 372 | kb1 = 1.5e-6 * spd |
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| [3443] | 373 | ! pcp and remin of Fe3p |
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| 374 | ks = 0.075 |
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| 375 | kpr = 0.05 |
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| [3446] | 376 | ! thermal reduction of Fe3 |
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| 377 | kth = 0.0048 * 24. |
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| [3461] | 378 | ! |
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| [3443] | 379 | ENDIF |
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| 380 | ! |
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| 381 | END SUBROUTINE p4z_fechem_init |
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| 382 | |
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| 383 | #else |
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| 384 | !!====================================================================== |
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| 385 | !! Dummy module : No PISCES bio-model |
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| 386 | !!====================================================================== |
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| 387 | CONTAINS |
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| 388 | SUBROUTINE p4z_fechem ! Empty routine |
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| 389 | END SUBROUTINE p4z_fechem |
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| 390 | #endif |
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| 391 | |
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| 392 | !!====================================================================== |
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| 393 | END MODULE p4zfechem |
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