[935] | 1 | MODULE p4zflx |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE p4zflx *** |
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| 4 | !! TOP : PISCES CALCULATES GAS EXCHANGE AND CHEMISTRY AT SEA SURFACE |
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| 5 | !!====================================================================== |
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| 6 | !! History : - ! 1988-07 (E. MAIER-REIMER) Original code |
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| 7 | !! - ! 1998 (O. Aumont) additions |
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| 8 | !! - ! 1999 (C. Le Quere) modifications |
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| 9 | !! 1.0 ! 2004 (O. Aumont) modifications |
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| 10 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | #if defined key_pisces |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !! 'key_pisces' PISCES bio-model |
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| 15 | !!---------------------------------------------------------------------- |
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| 16 | !! p4z_flx : CALCULATES GAS EXCHANGE AND CHEMISTRY AT SEA SURFACE |
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| 17 | !! p4z_flx_init : Read the namelist |
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| 18 | !!---------------------------------------------------------------------- |
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| 19 | USE trc |
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| 20 | USE oce_trc ! |
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[1119] | 21 | USE trc |
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[1073] | 22 | USE sms_pisces |
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[935] | 23 | USE prtctl_trc |
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| 24 | USE p4zche |
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[1457] | 25 | USE iom |
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[1534] | 26 | #if defined key_cpl_carbon_cycle |
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| 27 | USE sbc_oce , ONLY : atm_co2 |
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| 28 | #endif |
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[1298] | 29 | USE lib_mpp |
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| 30 | |
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[935] | 31 | IMPLICIT NONE |
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| 32 | PRIVATE |
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| 33 | |
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[1073] | 34 | PUBLIC p4z_flx |
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[935] | 35 | |
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| 36 | REAL(wp) :: & ! pre-industrial atmospheric [co2] (ppm) |
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[1457] | 37 | atcox = 0.20946 , & !: |
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| 38 | atcco2 = 278. !: |
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[935] | 39 | |
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[1534] | 40 | REAL(wp) :: & |
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[1735] | 41 | xconv = 0.01/3600 !: coefficients for conversion |
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[1534] | 42 | |
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[1735] | 43 | INTEGER :: nspyr !: number of timestep per year |
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| 44 | |
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[1534] | 45 | #if defined key_cpl_carbon_cycle |
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| 46 | REAL(wp), PUBLIC, DIMENSION(jpi,jpj) :: & |
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| 47 | oce_co2 !: ocean carbon flux |
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| 48 | REAL(wp) :: & |
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| 49 | t_atm_co2_flx, & !: Total atmospheric carbon flux per year |
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| 50 | t_oce_co2_flx !: Total ocean carbon flux per year |
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| 51 | #endif |
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| 52 | |
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[935] | 53 | !!* Substitution |
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[1808] | 54 | # include "top_substitute.h90" |
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[935] | 55 | !!---------------------------------------------------------------------- |
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| 56 | !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) |
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[1152] | 57 | !! $Id$ |
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[935] | 58 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 59 | !!---------------------------------------------------------------------- |
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| 60 | |
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| 61 | CONTAINS |
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| 62 | |
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| 63 | SUBROUTINE p4z_flx ( kt ) |
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| 64 | !!--------------------------------------------------------------------- |
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| 65 | !! *** ROUTINE p4z_flx *** |
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| 66 | !! |
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| 67 | !! ** Purpose : CALCULATES GAS EXCHANGE AND CHEMISTRY AT SEA SURFACE |
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| 68 | !! |
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| 69 | !! ** Method : - ??? |
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| 70 | !!--------------------------------------------------------------------- |
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| 71 | INTEGER, INTENT(in) :: kt |
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[1735] | 72 | INTEGER :: ji, jj, jrorr |
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[1457] | 73 | REAL(wp) :: ztc, ztc2, ztc3, zws, zkgwan |
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[935] | 74 | REAL(wp) :: zfld, zflu, zfld16, zflu16, zfact |
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[1457] | 75 | REAL(wp) :: zph, zah2, zbot, zdic, zalk, zsch_o2, zalka, zsch_co2 |
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[1534] | 76 | REAL(wp), DIMENSION(jpi,jpj) :: zkgco2, zkgo2, zh2co3 |
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[1457] | 77 | #if defined key_trc_diaadd && defined key_iomput |
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[1678] | 78 | REAL(wp), DIMENSION(jpi,jpj) :: zcflx, zoflx, zkg, zdpco2, zdpo2 |
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[1457] | 79 | #endif |
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[935] | 80 | CHARACTER (len=25) :: charout |
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| 81 | |
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| 82 | !!--------------------------------------------------------------------- |
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| 83 | |
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| 84 | |
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| 85 | IF( kt == nittrc000 ) CALL p4z_flx_init ! Initialization (first time-step only) |
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| 86 | |
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| 87 | ! SURFACE CHEMISTRY (PCO2 AND [H+] IN |
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| 88 | ! SURFACE LAYER); THE RESULT OF THIS CALCULATION |
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| 89 | ! IS USED TO COMPUTE AIR-SEA FLUX OF CO2 |
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| 90 | |
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| 91 | DO jrorr = 1, 10 |
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| 92 | |
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| 93 | !CDIR NOVERRCHK |
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| 94 | DO jj = 1, jpj |
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| 95 | !CDIR NOVERRCHK |
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| 96 | DO ji = 1, jpi |
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| 97 | |
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| 98 | ! DUMMY VARIABLES FOR DIC, H+, AND BORATE |
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| 99 | zbot = borat(ji,jj,1) |
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| 100 | zfact = rhop(ji,jj,1) / 1000. + rtrn |
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| 101 | zdic = trn(ji,jj,1,jpdic) / zfact |
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| 102 | zph = MAX( hi(ji,jj,1), 1.e-10 ) / zfact |
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| 103 | zalka = trn(ji,jj,1,jptal) / zfact |
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| 104 | |
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| 105 | ! CALCULATE [ALK]([CO3--], [HCO3-]) |
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| 106 | zalk = zalka - ( akw3(ji,jj,1) / zph - zph + zbot / ( 1.+ zph / akb3(ji,jj,1) ) ) |
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| 107 | |
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| 108 | ! CALCULATE [H+] AND [H2CO3] |
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| 109 | zah2 = SQRT( (zdic-zalk)**2 + 4.* ( zalk * ak23(ji,jj,1) & |
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| 110 | & / ak13(ji,jj,1) ) * ( 2.* zdic - zalk ) ) |
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| 111 | zah2 = 0.5 * ak13(ji,jj,1) / zalk * ( ( zdic - zalk ) + zah2 ) |
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| 112 | zh2co3(ji,jj) = ( 2.* zdic - zalk ) / ( 2.+ ak13(ji,jj,1) / zah2 ) * zfact |
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| 113 | hi(ji,jj,1) = zah2 * zfact |
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| 114 | END DO |
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| 115 | END DO |
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| 116 | END DO |
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| 117 | |
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| 118 | |
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| 119 | ! -------------- |
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| 120 | ! COMPUTE FLUXES |
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| 121 | ! -------------- |
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| 122 | |
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| 123 | ! FIRST COMPUTE GAS EXCHANGE COEFFICIENTS |
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| 124 | ! ------------------------------------------- |
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| 125 | |
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| 126 | !CDIR NOVERRCHK |
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| 127 | DO jj = 1, jpj |
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| 128 | !CDIR NOVERRCHK |
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| 129 | DO ji = 1, jpi |
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[1457] | 130 | ztc = MIN( 35., tn(ji,jj,1) ) |
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| 131 | ztc2 = ztc * ztc |
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| 132 | ztc3 = ztc * ztc2 |
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| 133 | ! Compute the schmidt Number both O2 and CO2 |
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| 134 | zsch_co2 = 2073.1 - 125.62 * ztc + 3.6276 * ztc2 - 0.043126 * ztc3 |
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| 135 | zsch_o2 = 1953.4 - 128.0 * ztc + 3.9918 * ztc2 - 0.050091 * ztc3 |
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[1007] | 136 | ! wind speed |
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[1457] | 137 | zws = wndm(ji,jj) * wndm(ji,jj) |
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| 138 | ! Compute the piston velocity for O2 and CO2 |
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| 139 | zkgwan = 0.3 * zws + 2.5 * ( 0.5246 + 0.016256 * ztc + 0.00049946 * ztc2 ) |
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[935] | 140 | # if defined key_off_degrad |
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[1457] | 141 | zkgwan = zkgwan * xconv * ( 1.- fr_i(ji,jj) ) * tmask(ji,jj,1) * facvol(ji,jj,1) |
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| 142 | #else |
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| 143 | zkgwan = zkgwan * xconv * ( 1.- fr_i(ji,jj) ) * tmask(ji,jj,1) |
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| 144 | #endif |
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| 145 | ! compute gas exchange for CO2 and O2 |
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| 146 | zkgco2(ji,jj) = zkgwan * SQRT( 660./ zsch_co2 ) |
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| 147 | zkgo2 (ji,jj) = zkgwan * SQRT( 660./ zsch_o2 ) |
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[935] | 148 | END DO |
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| 149 | END DO |
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| 150 | |
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| 151 | DO jj = 1, jpj |
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| 152 | DO ji = 1, jpi |
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| 153 | ! Compute CO2 flux for the sea and air |
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[1534] | 154 | #if ! defined key_cpl_carbon_cycle |
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[935] | 155 | zfld = atcco2 * tmask(ji,jj,1) * chemc(ji,jj,1) * zkgco2(ji,jj) |
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| 156 | zflu = zh2co3(ji,jj) * tmask(ji,jj,1) * zkgco2(ji,jj) |
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[1534] | 157 | #else |
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| 158 | zfld = atm_co2(ji,jj) * tmask(ji,jj,1) * chemc(ji,jj,1) * zkgco2(ji,jj) |
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| 159 | zflu = zh2co3(ji,jj) * tmask(ji,jj,1) * zkgco2(ji,jj) |
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[935] | 160 | ! compute flux of carbon |
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[1534] | 161 | oce_co2(ji,jj) = ( zfld - zflu ) * rfact & |
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[935] | 162 | & * e1t(ji,jj) * e2t(ji,jj) * tmask(ji,jj,1) * 1000. |
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[1534] | 163 | #endif |
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| 164 | tra(ji,jj,1,jpdic) = tra(ji,jj,1,jpdic) + ( zfld - zflu ) / fse3t(ji,jj,1) |
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[935] | 165 | |
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| 166 | ! Compute O2 flux |
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[1678] | 167 | zfld16 = atcox * chemc(ji,jj,2) * tmask(ji,jj,1) * zkgo2(ji,jj) |
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[935] | 168 | zflu16 = trn(ji,jj,1,jpoxy) * tmask(ji,jj,1) * zkgo2(ji,jj) |
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| 169 | tra(ji,jj,1,jpoxy) = tra(ji,jj,1,jpoxy) + ( zfld16 - zflu16 ) / fse3t(ji,jj,1) |
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| 170 | |
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[1534] | 171 | #if defined key_trc_diaadd |
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[935] | 172 | ! Save diagnostics |
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[1534] | 173 | # if ! defined key_iomput |
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| 174 | trc2d(ji,jj,jp_pcs0_2d ) = ( zfld - zflu ) * 1000. * tmask(ji,jj,1) |
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[1329] | 175 | trc2d(ji,jj,jp_pcs0_2d + 1) = ( zfld16 - zflu16 ) * 1000. * tmask(ji,jj,1) |
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| 176 | trc2d(ji,jj,jp_pcs0_2d + 2) = zkgco2(ji,jj) * tmask(ji,jj,1) |
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[1678] | 177 | trc2d(ji,jj,jp_pcs0_2d + 3) = ( atcco2 - zh2co3(ji,jj) / ( chemc(ji,jj,1) + rtrn ) ) & |
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| 178 | & * tmask(ji,jj,1) |
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[1534] | 179 | # else |
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[1457] | 180 | zcflx(ji,jj) = ( zfld - zflu ) * 1000. * tmask(ji,jj,1) |
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| 181 | zoflx(ji,jj) = ( zfld16 - zflu16 ) * 1000. * tmask(ji,jj,1) |
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| 182 | zkg (ji,jj) = zkgco2(ji,jj) * tmask(ji,jj,1) |
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[1678] | 183 | zdpco2(ji,jj) = ( atcco2 - zh2co3(ji,jj) / ( chemc(ji,jj,1) + rtrn ) ) & |
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| 184 | & * tmask(ji,jj,1) |
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| 185 | zdpo2 (ji,jj) = ( atcox - trn(ji,jj,1,jpoxy) / ( chemc(ji,jj,2) + rtrn ) ) & |
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| 186 | & * tmask(ji,jj,1) |
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[1534] | 187 | # endif |
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| 188 | #endif |
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[1457] | 189 | END DO |
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| 190 | END DO |
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| 191 | |
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[1534] | 192 | #if defined key_cpl_carbon_cycle |
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[935] | 193 | ! Total Flux of Carbon |
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[1534] | 194 | DO jj = 1, jpj |
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[935] | 195 | DO ji = 1, jpi |
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[1534] | 196 | t_atm_co2_flx = t_atm_co2_flx + atm_co2(ji,jj) * tmask_i(ji,jj) |
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| 197 | t_oce_co2_flx = t_oce_co2_flx + oce_co2(ji,jj) * tmask_i(ji,jj) |
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[935] | 198 | END DO |
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| 199 | END DO |
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| 200 | |
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| 201 | IF( MOD( kt, nspyr ) == 0 ) THEN |
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[1534] | 202 | IF( lk_mpp ) THEN |
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| 203 | CALL mpp_sum( t_atm_co2_flx ) ! sum over the global domain |
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| 204 | CALL mpp_sum( t_oce_co2_flx ) ! sum over the global domain |
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| 205 | ENDIF |
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[1830] | 206 | ! Conversion in GtC/yr ; negative for outgoing from ocean |
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| 207 | t_oce_co2_flx = (-1.) * t_oce_co2_flx * 12. / 1.e15 |
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| 208 | ! |
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[935] | 209 | WRITE(numout,*) ' Atmospheric pCO2 :' |
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[1534] | 210 | WRITE(numout,*) '-------------------- : ',kt,' ',t_atm_co2_flx |
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[935] | 211 | WRITE(numout,*) '(ppm)' |
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[1830] | 212 | WRITE(numout,*) 'Total Flux of Carbon out of the ocean :' |
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| 213 | WRITE(numout,*) '-------------------- : ',t_oce_co2_flx |
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| 214 | WRITE(numout,*) '(GtC/yr)' |
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[1534] | 215 | t_atm_co2_flx = 0. |
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| 216 | t_oce_co2_flx = 0. |
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[1830] | 217 | # if defined key_iomput |
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| 218 | CALL iom_put( "tatpco2" , t_atm_co2_flx ) |
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| 219 | CALL iom_put( "tco2flx" , t_oce_co2_flx ) |
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| 220 | #endif |
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[935] | 221 | ENDIF |
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[1534] | 222 | #endif |
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[935] | 223 | |
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| 224 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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| 225 | WRITE(charout, FMT="('flx ')") |
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| 226 | CALL prt_ctl_trc_info(charout) |
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| 227 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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| 228 | ENDIF |
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| 229 | |
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[1457] | 230 | # if defined key_trc_diaadd && defined key_iomput |
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[1678] | 231 | CALL iom_put( "Cflx" , zcflx ) |
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| 232 | CALL iom_put( "Oflx" , zoflx ) |
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| 233 | CALL iom_put( "Kg" , zkg ) |
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| 234 | CALL iom_put( "Dpco2", zdpco2 ) |
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| 235 | CALL iom_put( "Dpo2" , zdpo2 ) |
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[1457] | 236 | #endif |
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[935] | 237 | |
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| 238 | END SUBROUTINE p4z_flx |
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| 239 | |
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| 240 | SUBROUTINE p4z_flx_init |
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| 241 | |
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| 242 | !!---------------------------------------------------------------------- |
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| 243 | !! *** ROUTINE p4z_flx_init *** |
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| 244 | !! |
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| 245 | !! ** Purpose : Initialization of atmospheric conditions |
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| 246 | !! |
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[1119] | 247 | !! ** Method : Read the nampisext namelist and check the parameters |
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[935] | 248 | !! called at the first timestep (nittrc000) |
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[1119] | 249 | !! ** input : Namelist nampisext |
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[935] | 250 | !! |
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| 251 | !!---------------------------------------------------------------------- |
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| 252 | |
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[1119] | 253 | NAMELIST/nampisext/ atcco2 |
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[935] | 254 | |
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| 255 | REWIND( numnat ) ! read numnat |
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[1119] | 256 | READ ( numnat, nampisext ) |
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[935] | 257 | |
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| 258 | IF(lwp) THEN ! control print |
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| 259 | WRITE(numout,*) ' ' |
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[1119] | 260 | WRITE(numout,*) ' Namelist parameters for air-sea exchange, nampisext' |
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[935] | 261 | WRITE(numout,*) ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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| 262 | WRITE(numout,*) ' Atmospheric pCO2 atcco2 =', atcco2 |
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| 263 | ENDIF |
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| 264 | |
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[1735] | 265 | ! number of time step per year |
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| 266 | nspyr = INT( nyear_len(1) * rday / rdt ) |
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| 267 | |
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[1534] | 268 | #if defined key_cpl_carbon_cycle |
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| 269 | ! Initialization of Flux of Carbon |
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| 270 | oce_co2(:,:) = 0. |
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| 271 | t_atm_co2_flx = 0. |
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| 272 | t_oce_co2_flx = 0. |
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| 273 | #endif |
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[1298] | 274 | |
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[935] | 275 | END SUBROUTINE p4z_flx_init |
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| 276 | |
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| 277 | #else |
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| 278 | !!====================================================================== |
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| 279 | !! Dummy module : No PISCES bio-model |
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| 280 | !!====================================================================== |
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| 281 | CONTAINS |
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| 282 | SUBROUTINE p4z_flx( kt ) ! Empty routine |
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| 283 | INTEGER, INTENT( in ) :: kt |
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| 284 | WRITE(*,*) 'p4z_flx: You should not have seen this print! error?', kt |
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| 285 | END SUBROUTINE p4z_flx |
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| 286 | #endif |
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| 287 | |
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| 288 | !!====================================================================== |
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| 289 | END MODULE p4zflx |
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