[274] | 1 | CCC$Header$ |
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| 2 | CCC TOP 1.0 , LOCEAN-IPSL (2005) |
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| 3 | C This software is governed by CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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| 4 | C --------------------------------------------------------------------------- |
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[186] | 5 | CDIR$ LIST |
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| 6 | SUBROUTINE p4zrem |
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| 7 | #if defined key_passivetrc && defined key_trc_pisces |
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| 8 | CCC--------------------------------------------------------------------- |
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| 9 | CCC |
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| 10 | CCC ROUTINE p4zrem : PISCES MODEL |
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| 11 | CCC ***************************** |
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| 12 | CCC |
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| 13 | CCC PURPOSE : |
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| 14 | CCC --------- |
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| 15 | CCC Compute remineralization/scavenging of organic compounds |
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| 16 | CCC |
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| 17 | CC INPUT : |
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| 18 | CC ----- |
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| 19 | CC common |
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| 20 | CC all the common defined in opa |
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| 21 | CC |
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| 22 | CC |
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| 23 | CC OUTPUT : : no |
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| 24 | CC ------ |
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| 25 | CC |
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| 26 | CC EXTERNAL : |
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| 27 | CC -------- |
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| 28 | CC None |
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| 29 | CC |
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| 30 | CC MODIFICATIONS: |
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| 31 | CC -------------- |
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| 32 | CC original : 2004 - O. Aumont |
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| 33 | CC---------------------------------------------------------------------- |
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| 34 | CC parameters and commons |
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| 35 | CC ====================== |
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| 36 | CDIR$ NOLIST |
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| 37 | USE oce_trc |
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| 38 | USE trp_trc |
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| 39 | USE sms |
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| 40 | IMPLICIT NONE |
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| 41 | CDIR$ LIST |
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| 42 | CC---------------------------------------------------------------------- |
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| 43 | CC local declarations |
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| 44 | CC ================== |
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| 45 | INTEGER ji, jj, jk |
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| 46 | REAL remip,remik,xlam1b |
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| 47 | REAL xkeq,xfeequi,siremin |
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| 48 | REAL zsatur,zsatur2,znusil |
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| 49 | REAL fesatur(jpi,jpj,jpk) |
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| 50 | CC---------------------------------------------------------------------- |
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| 51 | CC statement functions |
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| 52 | CC =================== |
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| 53 | CDIR$ NOLIST |
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| 54 | #include "domzgr_substitute.h90" |
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| 55 | CDIR$ LIST |
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| 56 | C |
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| 57 | C Computation of the mean phytoplankton concentration as |
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| 58 | C a crude estimate of the bacterial biomass |
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| 59 | C -------------------------------------------------- |
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| 60 | C |
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| 61 | DO jj=1,jpj |
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| 62 | DO ji=1,jpi |
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| 63 | phymoy(ji,jj)=min((trn(ji,jj,1,jpphy)+trn(ji,jj,1,jpdia)) |
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| 64 | . ,3.E-6) |
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| 65 | END DO |
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| 66 | END DO |
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| 67 | |
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| 68 | DO jk = 1,jpk-1 |
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| 69 | DO jj = 1,jpj |
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| 70 | DO ji = 1,jpi |
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| 71 | C |
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| 72 | C DENITRIFICATION FACTOR COMPUTED FROM O2 LEVELS |
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| 73 | C ---------------------------------------------- |
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| 74 | C |
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| 75 | nitrfac(ji,jj,jk)= |
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| 76 | & max(0.,0.4*(6.E-6-trn(ji,jj,jk,jpoxy))/(oxymin+ |
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| 77 | & trn(ji,jj,jk,jpoxy))) |
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| 78 | nitrfac(ji,jj,jk)=min(1.,nitrfac(ji,jj,jk)) |
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| 79 | END DO |
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| 80 | END DO |
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| 81 | END DO |
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| 82 | |
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| 83 | DO jk = 1,jpkm1 |
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| 84 | DO jj = 1,jpj |
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| 85 | DO ji = 1,jpi |
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| 86 | C |
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| 87 | C DOC ammonification. Depends on depth, phytoplankton biomass |
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| 88 | C and a limitation term which is supposed to be a parameterization |
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| 89 | C of the bacterial activity. |
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| 90 | C ---------------------------------------------------------------- |
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| 91 | remik= |
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| 92 | & xremik*rfact2/(rjjss*1.E-6)*tmask(ji,jj,jk) |
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| 93 | & *xlimbac(ji,jj,jk)*phymoy(ji,jj)*max(0.1 |
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| 94 | & ,exp(-max(0.,(fsdept(ji,jj,jk)-hmld(ji,jj)))/200.)) |
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| 95 | # if defined key_off_degrad |
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| 96 | & *facvol(ji,jj,jk) |
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| 97 | # endif |
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| 98 | C |
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| 99 | C Ammonification in oxic waters with oxygen consumption |
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| 100 | C ----------------------------------------------------- |
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| 101 | C |
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| 102 | olimi(ji,jj,jk)=min((trn(ji,jj,jk,jpoxy)-rtrn)/o2ut, |
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| 103 | & remik*(1.-nitrfac(ji,jj,jk))*trn(ji,jj,jk,jpdoc)) |
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| 104 | olimi(ji,jj,jk)=max(0.,olimi(ji,jj,jk)) |
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| 105 | C |
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| 106 | C Ammonification in suboxic waters with denitrification |
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| 107 | C ------------------------------------------------------- |
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| 108 | C |
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| 109 | denitr(ji,jj,jk)=min((trn(ji,jj,jk,jpno3)-rtrn)/6.1, |
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| 110 | & remik*nitrfac(ji,jj,jk)*trn(ji,jj,jk,jpdoc)) |
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| 111 | END DO |
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| 112 | END DO |
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| 113 | END DO |
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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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| 118 | C |
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| 119 | C NH4 nitrification to NO3. Ceased for oxygen concentrations |
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| 120 | C below 2 umol/L. Inhibited at strong light |
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| 121 | C ---------------------------------------------------------- |
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| 122 | C |
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| 123 | onitr(ji,jj,jk)=nitrif*rfact2/rjjss*trn(ji,jj,jk,jpnh4) |
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| 124 | & *1./(1.+emoy(ji,jj,jk))*tmask(ji,jj,jk) |
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| 125 | & *(1.-nitrfac(ji,jj,jk)) |
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| 126 | # if defined key_off_degrad |
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| 127 | & *facvol(ji,jj,jk) |
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| 128 | # endif |
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| 129 | END DO |
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| 130 | END DO |
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| 131 | END DO |
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| 132 | |
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| 133 | DO jk = 1,jpkm1 |
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| 134 | DO jj = 1,jpj |
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| 135 | DO ji = 1,jpi |
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| 136 | C |
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| 137 | C Bacterial uptake of iron. No iron is available in DOC. So |
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| 138 | C Bacteries are obliged to take up iron from the water. Some |
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| 139 | C studies (especially at Papa) have shown this uptake to be |
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| 140 | C significant |
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| 141 | C ---------------------------------------------------------- |
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| 142 | C |
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| 143 | xbactfer(ji,jj,jk)=0.02*20E-6*rfact2 |
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| 144 | & *prmax(ji,jj,jk)*tmask(ji,jj,jk)*xlimphy(ji,jj,jk) |
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| 145 | & *xlimdia(ji,jj,jk)*phymoy(ji,jj)*exp(-max |
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| 146 | & (fsdept(ji,jj,jk)-hmld(ji,jj),0.)/200.) |
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| 147 | END DO |
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| 148 | END DO |
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| 149 | END DO |
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| 150 | C |
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| 151 | DO jk = 1,jpkm1 |
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| 152 | DO jj = 1,jpj |
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| 153 | DO ji = 1,jpi |
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| 154 | C |
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| 155 | C POC disaggregation by turbulence and bacterial activity. |
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| 156 | C ------------------------------------------------------------- |
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| 157 | C |
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| 158 | remip=xremip/rjjss*rfact2*tmask(ji,jj,jk)*(0.25+0.75 |
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| 159 | & *exp(-max((fsdept(ji,jj,jk)-150.),0.)/1000.)) |
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| 160 | # if defined key_off_degrad |
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| 161 | & *facvol(ji,jj,jk) |
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| 162 | # endif |
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| 163 | C |
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| 164 | C POC disaggregation rate is reduced in anoxic zone as shown by |
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| 165 | C sediment traps data. In oxic area, the exponent of the martin's |
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| 166 | C law is around -0.87. In anoxic zone, it is around -0.35. This |
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| 167 | C means a disaggregation constant about 0.5 the value in oxic zones |
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| 168 | C ----------------------------------------------------------------- |
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| 169 | C |
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| 170 | remip=remip*(1.-0.5*nitrfac(ji,jj,jk)) |
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| 171 | C |
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| 172 | orem(ji,jj,jk)=remip*trn(ji,jj,jk,jppoc) |
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| 173 | orem2(ji,jj,jk)=remip*trn(ji,jj,jk,jpgoc) |
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| 174 | ofer(ji,jj,jk)=remip*trn(ji,jj,jk,jpsfe) |
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| 175 | ofer2(ji,jj,jk)=remip*trn(ji,jj,jk,jpbfe) |
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| 176 | C |
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| 177 | END DO |
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| 178 | END DO |
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| 179 | END DO |
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| 180 | |
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| 181 | DO jk = 1,jpkm1 |
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| 182 | DO jj = 1,jpj |
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| 183 | DO ji = 1,jpi |
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| 184 | C |
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| 185 | C Remineralization rate of BSi depedant on T and saturation |
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| 186 | C --------------------------------------------------------- |
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| 187 | C |
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| 188 | zsatur=(sio3eq(ji,jj,jk)-trn(ji,jj,jk,jpsil))/ |
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| 189 | & (sio3eq(ji,jj,jk)+rtrn) |
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| 190 | zsatur2=zsatur*(1.+tn(ji,jj,jk)/400.)**2* |
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| 191 | & (1.+tn(ji,jj,jk)/400.)**2 |
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[260] | 192 | |
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[186] | 193 | znusil=0.225*(1.+tn(ji,jj,jk)/15.)*zsatur+0.775 |
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| 194 | & *exp(9.25*log(zsatur2)) |
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| 195 | |
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| 196 | siremin=xsirem/rjjss*rfact2*tmask(ji,jj,jk)*znusil |
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| 197 | # if defined key_off_degrad |
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| 198 | & *facvol(ji,jj,jk) |
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| 199 | # endif |
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| 200 | C |
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| 201 | osil(ji,jj,jk)=siremin*trn(ji,jj,jk,jpdsi) |
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| 202 | END DO |
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| 203 | END DO |
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| 204 | END DO |
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| 205 | |
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| 206 | DO jk = 1,jpkm1 |
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| 207 | DO jj = 1,jpj |
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| 208 | DO ji = 1,jpi |
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| 209 | C |
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| 210 | C scavenging rate of iron. this scavenging rate depends on the |
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| 211 | C load in particles on which they are adsorbed. The |
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| 212 | C parameterization has been taken from studies on Th |
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| 213 | C ------------------------------------------------------------ |
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| 214 | C |
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| 215 | xkeq=fekeq(ji,jj,jk) |
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| 216 | fesatur(ji,jj,jk)=0.6E-9 |
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| 217 | xfeequi=(-(1.+fesatur(ji,jj,jk)*xkeq-xkeq*trn(ji,jj,jk,jpfer))+ |
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| 218 | & sqrt((1.+fesatur(ji,jj,jk)*xkeq-xkeq*trn(ji,jj,jk,jpfer))**2 |
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| 219 | & +4.*trn(ji,jj,jk,jpfer)*xkeq))/(2.*xkeq) |
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| 220 | |
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| 221 | xlam1b=3E-5+xlam1*(trn(ji,jj,jk,jppoc) |
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| 222 | & +trn(ji,jj,jk,jpgoc)+trn(ji,jj,jk,jpcal)+ |
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| 223 | & trn(ji,jj,jk,jpdsi))*1E6 |
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| 224 | |
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| 225 | xscave(ji,jj,jk)=xfeequi*xlam1b/rjjss*rfact2*tmask(ji,jj,jk) |
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| 226 | # if defined key_off_degrad |
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| 227 | & *facvol(ji,jj,jk) |
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| 228 | # endif |
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| 229 | C |
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| 230 | C Increased scavenging for very high iron concentrations |
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| 231 | C found near the coasts due to increased lithogenic particles |
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| 232 | C and let's say it unknown processes (precipitation, ...) |
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| 233 | C ----------------------------------------------------------- |
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| 234 | C |
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| 235 | xaggdfe(ji,jj,jk)=2.*xlam1*rfact2/rjjss*max(0., |
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| 236 | & (trn(ji,jj,jk,jpfer)*1E9-1.))*trn(ji,jj,jk,jpfer) |
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| 237 | & *tmask(ji,jj,jk) |
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| 238 | # if defined key_off_degrad |
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| 239 | & *facvol(ji,jj,jk) |
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| 240 | # endif |
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| 241 | C |
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| 242 | END DO |
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| 243 | END DO |
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| 244 | END DO |
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| 245 | C |
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| 246 | #endif |
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| 247 | RETURN |
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| 248 | END |
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