[4] | 1 | SUBROUTINE ice_gas(nlay_i,kideb,kiut) |
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| 2 | |
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| 3 | ! |
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| 4 | !-----------------------------------------------------------------------------! |
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| 5 | ! *** ice_gas *** |
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| 6 | ! |
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| 7 | ! Nov 2015 |
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| 8 | ! |
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| 9 | ! Version : source_3.10 |
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| 10 | ! |
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| 11 | ! to do |
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| 12 | ! - put the computation of solubilities in a subroutine |
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| 13 | ! - check conservation |
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| 14 | ! - brine characteristics to subroutinize |
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| 15 | ! - missing carbonate chemistry in the end |
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| 16 | !-----------------------------------------------------------------------------! |
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| 17 | |
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| 18 | USE lib_fortran |
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| 19 | |
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| 20 | INCLUDE 'type.com' |
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| 21 | INCLUDE 'para.com' |
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| 22 | INCLUDE 'const.com' |
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| 23 | INCLUDE 'ice.com' |
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| 24 | INCLUDE 'thermo.com' |
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| 25 | INCLUDE 'bio.com' |
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| 26 | |
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| 27 | REAL(8) :: |
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| 28 | & zsat, |
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| 29 | & zsat_diff |
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| 30 | |
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| 31 | LOGICAL :: |
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| 32 | & ln_write_gas = .TRUE. |
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| 33 | |
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| 34 | !==============================================================================! |
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| 35 | |
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| 36 | IF ( ln_write_gas ) THEN |
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| 37 | |
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| 38 | WRITE(numout,*) |
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| 39 | WRITE(numout,*) ' ** ice_gas : ' |
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| 40 | WRITE(numout,*) ' ~~~~~~~~~~~~ ' |
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| 41 | |
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| 42 | ENDIF |
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| 43 | |
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| 44 | ! |
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| 45 | !------------------------------------------------------------------------------! |
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| 46 | ! 1) Initialize conservation test and gas concentrations |
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| 47 | !------------------------------------------------------------------------------! |
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| 48 | ! |
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| 49 | |
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| 50 | !--- Gas concentrations |
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| 51 | DO jn = 1, ntra_bio |
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| 52 | |
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| 53 | ! Brine concentrations |
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| 54 | IF ( ( flag_active(jn) ) .AND. |
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| 55 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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| 56 | DO layer = 1, nlay_bio |
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| 57 | c_i_bio(jn,layer) = cbu_i_bio(jn,layer) / e_i_bio(layer) |
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| 58 | END DO |
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| 59 | ENDIF |
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| 60 | |
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| 61 | ! Carbonate chemistry |
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| 62 | IF ( ln_carbon ) CALL ice_carb_chem |
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| 63 | |
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| 64 | IF ( ( flag_active(jn) ) .AND. |
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| 65 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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| 66 | DO layer = 1, nlay_bio |
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| 67 | c_gtot_i(jn,layer) = cbu_i_bio(jn,layer) + |
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| 68 | & cbub_i_bio(jn,layer) |
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| 69 | END DO |
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| 70 | |
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| 71 | ENDIF |
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| 72 | |
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| 73 | END DO |
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| 74 | |
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| 75 | !--- Conservation test |
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| 76 | CALL ice_gas_column( ntra_bio , c_gtot_i, deltaz_i_bio, .TRUE., |
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| 77 | & mt_i_gas_init ) |
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| 78 | |
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| 79 | DO jn = 1, ntra_bio |
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| 80 | |
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| 81 | IF ( ( flag_active(jn) ) .AND. |
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| 82 | & ( biotr_i_typ(jn) .EQ. 'gas' ) .AND. |
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| 83 | & ln_write_gas ) THEN |
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| 84 | |
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| 85 | WRITE(numout,*) |
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| 86 | WRITE(numout,*) ' *** Initial values *** ' |
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| 87 | WRITE(numout,*) ' --- time step --- : ', numit |
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| 88 | |
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| 89 | WRITE(numout,*) ' --- Tracer --- : ', biotr_i_nam(jn) |
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| 90 | WRITE(numout,*) 'c_i_bio : ',c_i_bio(jn,layer_00:nlay_bio) |
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| 91 | WRITE(numout,*) 'cbu_i_bio: ',cbu_i_bio(jn,layer_00:nlay_bio) |
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| 92 | WRITE(numout,*) 'cbub_i_bio: ', |
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| 93 | & cbub_i_bio(jn,layer_00:nlay_bio) |
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| 94 | WRITE(numout,*) 'c_gtot_i : ',c_gtot_i(jn,layer_00:nlay_bio) |
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| 95 | WRITE(numout,*) |
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| 96 | WRITE(numout,*) ' mt_i_gas_init : ', mt_i_gas_init(jn) |
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| 97 | |
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| 98 | ENDIF |
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| 99 | |
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| 100 | END DO |
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| 101 | |
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| 102 | ! |
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| 103 | !------------------------------------------------------------------------------! |
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| 104 | ! 2) Bubble formation and dissolution |
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| 105 | !------------------------------------------------------------------------------! |
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| 106 | ! |
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| 107 | |
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| 108 | !--------------------------- |
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| 109 | CALL ice_gas_solu ! Saturation concentrations |
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| 110 | !--------------------------- |
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| 111 | |
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| 112 | IF ( ln_bubform ) THEN |
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| 113 | |
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| 114 | IF ( ln_write_gas ) THEN |
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| 115 | WRITE(numout,*) |
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| 116 | WRITE(numout,*) ' *** Bubble formation and dissolution *** ' |
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| 117 | WRITE(numout,*) |
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| 118 | ENDIF |
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| 119 | |
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| 120 | DO jn = 1, ntra_bio |
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| 121 | |
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| 122 | IF ( flag_active(jn) .AND. |
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| 123 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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| 124 | |
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| 125 | IF ( ln_write_gas ) THEN |
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| 126 | WRITE(numout,*) ' Tracer number : ', jn |
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| 127 | WRITE(numout,*) ' --- ', biotr_i_nam(jn) |
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| 128 | ENDIF |
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| 129 | |
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| 130 | DO layer = 1, nlay_bio |
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| 131 | |
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| 132 | zsat = csat_gas(jn,layer) * sursat_gas |
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| 133 | zsat_diff = zsat - c_i_bio(jn,layer) ! undersaturation |
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| 134 | |
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| 135 | ! bubble formation or dissolution rate |
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| 136 | IF ( zsat_diff .LE. 0 ) THEN ! sursaturation |
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| 137 | zbub_rate = bub_form_rate |
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| 138 | ELSE |
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| 139 | zbub_rate = bub_diss_rate |
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| 140 | ENDIF |
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| 141 | |
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| 142 | ! change in bulk bubble concentration |
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| 143 | zd_cbri = zsat_diff * zbub_rate * ddtb |
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| 144 | zd_cbri = MAX( -c_i_bio(jn,layer), zd_cbri ) ! cannot exhaust brines |
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| 145 | zd_cbri = MIN( cbub_i_bio(jn,layer)/e_i_bio(layer), ! cannot exhaust gas bubbles |
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| 146 | & zd_cbri ) |
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| 147 | c_i_bio(jn,layer) = c_i_bio(jn,layer) + zd_cbri |
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| 148 | |
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| 149 | ! change in bulk bubble concentration |
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| 150 | zd_cbub = - zd_cbri*e_i_bio(layer) |
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| 151 | cbub_i_bio(jn,layer) = cbub_i_bio(jn,layer) + zd_cbub |
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| 152 | |
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| 153 | ! Update bulk concentration |
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| 154 | cbu_i_bio(jn,layer) =e_i_bio(layer)*c_i_bio(jn,layer) |
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| 155 | |
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| 156 | ! Diagnostic % saturation ratio |
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| 157 | pc_sat(jn,layer) = c_i_bio(jn,layer) / |
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| 158 | & csat_gas(jn,layer) * 100. |
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| 159 | |
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| 160 | ! Update DIC for CO2 |
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| 161 | IF ( jn .EQ. jn_co2 ) |
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| 162 | & cbu_i_bio(jn_dic,layer) = |
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| 163 | & cbu_i_bio(jn_dic,layer) - zd_cbub |
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| 164 | |
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| 165 | END DO ! layer |
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| 166 | |
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| 167 | ENDIF ! flags, biotr_i_typ |
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| 168 | |
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| 169 | END DO ! ntra_bio |
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| 170 | ! |
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| 171 | ENDIF ! ln_bubform |
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| 172 | |
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| 173 | ! |
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| 174 | !------------------------------------------------------------------------------! |
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| 175 | ! 3) Bubble rise |
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| 176 | !------------------------------------------------------------------------------! |
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| 177 | ! |
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| 178 | IF ( ln_bubrise ) THEN |
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| 179 | |
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| 180 | IF ( ln_write_gas ) THEN |
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| 181 | WRITE(numout,*) |
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| 182 | WRITE(numout,*) ' *** Bubble rise *** ' |
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| 183 | ENDIF |
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| 184 | |
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| 185 | f_bub(:) = 0. |
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| 186 | |
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| 187 | IF ( ln_write_gas ) WRITE(numout,*) ' *** immediate rise' |
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| 188 | |
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| 189 | DO jn = 1, ntra_bio |
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| 190 | |
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| 191 | IF ( flag_active(jn) .AND. |
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| 192 | & ( biotr_i_typ(jn) .EQ. 'gas' ) ) THEN |
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| 193 | |
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| 194 | IF ( ln_write_gas ) THEN |
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| 195 | WRITE(numout,*) ' Tracer number : ', jn |
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| 196 | WRITE(numout,*) ' --- ', biotr_i_nam(jn) |
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| 197 | ENDIF |
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| 198 | |
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| 199 | DO layer = nlay_bio, 1, -1 |
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| 200 | |
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| 201 | zswitch = 0. ! by default, bubbles rise |
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| 202 | |
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| 203 | ! i_imper_layer: identifies the first impermeable layer above "layer" |
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| 204 | ! if no such layer, then i_imper_layer = 0 and gas get out of the ice |
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| 205 | ! via f_bub |
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| 206 | |
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| 207 | i_imper_layer = 0 |
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| 208 | |
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| 209 | IF ( e_i_bio(layer) .LE. e_thr_bubrise ) THEN |
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| 210 | i_imper_layer = layer |
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| 211 | ELSE |
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| 212 | DO layer_2 = layer - 1, 1, -1 ! find a layer above |
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| 213 | IF ( ( zswitch .LE. 0 ) .AND. |
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| 214 | & ( e_i_bio(layer_2) .LT. e_thr_bubrise ) ) THEN |
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| 215 | zswitch = 1. |
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| 216 | i_imper_layer = MAX(i_imper_layer, layer_2) |
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| 217 | ENDIF ! e_i_bio |
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| 218 | END DO ! layer2 |
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| 219 | ENDIF |
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| 220 | |
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| 221 | ! Transfer gas among layers |
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| 222 | IF ( ( i_imper_layer .GT. 0 ) .AND. |
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| 223 | & ( i_imper_layer .NE. layer ) ) THEN ! in-ice bubble transfer |
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| 224 | cbub_i_bio(jn,i_imper_layer) = ! add gas in the impermeable layer |
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| 225 | & cbub_i_bio(jn,i_imper_layer)+cbub_i_bio(jn,layer) |
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| 226 | cbub_i_bio(jn,layer) = 0. ! remove gas from the permeable layer |
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| 227 | ENDIF |
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| 228 | |
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| 229 | IF ( i_imper_layer .EQ. 0 ) THEN ! ice-atmosphere bubble transfer |
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| 230 | f_bub(jn) = f_bub(jn) + cbub_i_bio(jn,layer) * |
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| 231 | & deltaz_i_bio(layer) / ddtb |
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| 232 | cbub_i_bio(jn,layer) = 0. ! remove gas from the permeable layer |
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| 233 | ENDIF ! i_imper_layer |
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| 234 | |
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| 235 | END DO |
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| 236 | |
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| 237 | ENDIF ! flag_active, biotr_i_typ |
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| 238 | |
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| 239 | END DO ! jn |
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| 240 | |
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| 241 | ENDIF ! ln_bubrise |
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| 242 | |
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| 243 | ! |
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| 244 | !------------------------------------------------------------------------------! |
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| 245 | ! 4) Update total gas concentration |
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| 246 | !------------------------------------------------------------------------------! |
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| 247 | ! |
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| 248 | |
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| 249 | DO jn = 1, ntra_bio |
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| 250 | |
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| 251 | IF ( ( flag_active(jn) ) .AND. |
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| 252 | & ( biotr_i_typ(jn) .EQ. 'gas' ) .AND. |
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| 253 | & ln_write_gas ) THEN |
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| 254 | |
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| 255 | DO layer = 1, nlay_bio ! dégazage des couches 2 à nlay_bio |
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| 256 | c_gtot_i(jn,layer) = cbu_i_bio(jn,layer) + |
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| 257 | & cbub_i_bio(jn,layer) |
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| 258 | END DO |
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| 259 | |
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| 260 | WRITE(numout,*) ' *** After ice_gas *** ' |
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| 261 | |
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| 262 | WRITE(numout,*) ' Tracer : ', biotr_i_nam(jn) |
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| 263 | WRITE(numout,*) ' c_i_bio : ', ( c_i_bio(jn,layer), ! concentration of tracers in brines (mmol m-3) |
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| 264 | & layer = 1, nlay_bio ) |
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| 265 | WRITE(numout,*) ' cbu_i_bio: ', ( cbu_i_bio(jn,layer), ! concentration of tracers in bulk ice |
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| 266 | & layer = 1, nlay_bio ) |
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| 267 | WRITE(numout,*) ' cbub_i_bio : ', ( cbub_i_bio(jn,layer), ! concentration of tracers in bubbles in bulk ice |
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| 268 | & layer = 1, nlay_bio ) |
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| 269 | WRITE(numout,*) ' c_gtot_i : ', ( c_gtot_i(jn,layer), ! concentration of tracers in bubbles + bulk ice |
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| 270 | & layer = 1, nlay_bio ) |
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| 271 | WRITE(numout,*) |
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| 272 | |
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| 273 | ENDIF |
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| 274 | |
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| 275 | ENDDO |
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| 276 | |
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| 277 | ! |
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| 278 | !------------------------------------------------------------------------------! |
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| 279 | ! 4) Conservation test and output |
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| 280 | !------------------------------------------------------------------------------! |
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| 281 | ! |
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| 282 | |
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| 283 | CALL ice_gas_column( ntra_bio , c_gtot_i, deltaz_i_bio, .TRUE., |
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| 284 | & mt_i_gas_final ) |
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| 285 | |
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| 286 | IF ( ln_write_gas ) THEN |
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| 287 | DO jn = 1, ntra_bio |
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| 288 | WRITE(numout,*) ' tracer : ', biotr_i_nam(jn) |
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| 289 | WRITE(numout,*) ' mt_i_gas_init : ', mt_i_gas_init(jn) |
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| 290 | WRITE(numout,*) ' mt_i_gas_final : ', mt_i_gas_final(jn) |
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| 291 | END DO |
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| 292 | ENDIF |
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| 293 | |
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| 294 | DO jn = 1, ntra_bio |
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| 295 | zfbub = f_bub(jn) * ddtb |
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| 296 | WRITE(numout,*) ' tracer : ', biotr_i_nam(jn) |
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| 297 | WRITE(numout,*) ' zfbub : ', zfbub |
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| 298 | |
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| 299 | IF ( ABS( mt_i_gas_init(jn) - mt_i_gas_final(jn) - zfbub ) |
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| 300 | & .GT. 1.0e-10 ) |
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| 301 | & THEN |
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| 302 | WRITE(numout,*) |
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| 303 | WRITE(numout,*) ' ALERT!!! TOTAL GAS NOT CONSERVED ' |
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| 304 | WRITE(numout,*) ' at time step : ', numit |
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| 305 | WRITE(numout,*) ' tracer : ', jn |
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| 306 | WRITE(numout,*) ' mt_i_gas_init : ', mt_i_gas_init(jn) |
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| 307 | WRITE(numout,*) ' mt_i_gas_final : ', mt_i_gas_final(jn) |
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| 308 | WRITE(numout,*) ' diff : ', mt_i_gas_init(jn) - |
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| 309 | & mt_i_gas_final(jn) - zfbub |
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| 310 | WRITE(numout,*) ' zfbub : ', zfbub |
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| 311 | WRITE(numout,*) |
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| 312 | ENDIF |
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| 313 | ENDDO |
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| 314 | |
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| 315 | ! |
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| 316 | !------------------------------------------------------------------------------! |
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| 317 | ! x) Update DIC and carbonate chemistry |
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| 318 | !------------------------------------------------------------------------------! |
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| 319 | ! |
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| 320 | IF ( ln_carbon ) CALL ice_carb_chem |
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| 321 | |
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| 322 | !------------------------------------------------------------------------------! |
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| 323 | ! X) End of the routine |
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| 324 | !------------------------------------------------------------------------------! |
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| 325 | ! |
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| 326 | WRITE(numout,*) |
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| 327 | WRITE(numout,*) ' End of ice_gas ' |
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| 328 | WRITE(numout,*) '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~' |
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| 329 | |
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| 330 | |
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| 331 | !==============================================================================| |
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| 332 | ! Fin de la routine ice_gas |
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| 333 | WRITE(numout,*) |
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| 334 | |
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| 335 | END |
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