[10225] | 1 | MODULE sedorg |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE seddsr *** |
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| 4 | !! Sediment : dissolution and reaction in pore water related |
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| 5 | !! related to organic matter |
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| 6 | !!===================================================================== |
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| 7 | !! * Modules used |
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| 8 | USE sed ! sediment global variable |
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| 9 | USE sed_oce |
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| 10 | USE sedini |
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| 11 | USE seddiff |
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| 12 | USE seddsr |
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| 13 | USE lib_mpp ! distribued memory computing library |
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| 14 | USE lib_fortran |
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| 15 | |
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| 16 | IMPLICIT NONE |
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| 17 | PRIVATE |
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| 18 | |
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| 19 | PUBLIC sed_org |
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| 20 | |
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| 21 | !! * Module variables |
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| 22 | |
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| 23 | REAL(wp) :: zadsnh4 |
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| 24 | |
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| 25 | !! $Id: seddsr.F90 5215 2015-04-15 16:11:56Z nicolasmartin $ |
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| 26 | CONTAINS |
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| 27 | |
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| 28 | SUBROUTINE sed_org( kt ) |
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| 29 | !!---------------------------------------------------------------------- |
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| 30 | !! *** ROUTINE sed_org *** |
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| 31 | !! |
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| 32 | !! ** Purpose : computes pore water diffusion and reaction |
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| 33 | !! |
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| 34 | !! ** Methode : Computation of the redox reactions in sediment. |
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| 35 | !! The main redox reactions are solved in sed_dsr whereas |
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| 36 | !! the secondary reactions are solved in sed_dsr_redoxb. |
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| 37 | !! A strand spliting approach is being used here (see |
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| 38 | !! sed_dsr_redoxb for more information). |
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| 39 | !! Diffusive fluxes are computed in sed_diff |
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| 40 | !! |
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| 41 | !! History : |
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| 42 | !! ! 98-08 (E. Maier-Reimer, Christoph Heinze ) Original code |
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| 43 | !! ! 04-10 (N. Emprin, M. Gehlen ) f90 |
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| 44 | !! ! 06-04 (C. Ethe) Re-organization |
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| 45 | !! ! 19-08 (O. Aumont) Debugging and improvement of the model. |
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| 46 | !! The original method is replaced by a |
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| 47 | !! Strand splitting method which deals |
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| 48 | !! well with stiff reactions. |
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| 49 | !!---------------------------------------------------------------------- |
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| 50 | !! Arguments |
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| 51 | INTEGER, INTENT(in) :: kt |
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| 52 | ! --- local variables |
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| 53 | INTEGER :: ji, jk, js, jw, jnt ! dummy looop indices |
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| 54 | REAL(wp) :: zadsnh4 |
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| 55 | !! |
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| 56 | !!---------------------------------------------------------------------- |
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| 57 | |
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| 58 | IF( ln_timing ) CALL timing_start('sed_org') |
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| 59 | ! |
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| 60 | IF( kt == nitsed000 ) THEN |
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| 61 | IF (lwp) THEN |
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| 62 | WRITE(numsed,*) ' sed_org : Organic degradation related reactions and diffusion' |
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| 63 | WRITE(numsed,*) ' ' |
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| 64 | ENDIF |
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| 65 | ! ! |
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| 66 | dens_mol_wgt(1:jpsol) = denssol / mol_wgt(1:jpsol) |
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| 67 | ! |
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| 68 | ENDIF |
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| 69 | |
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| 70 | dtsed2 = dtsed / REAL( nrseddt, wp ) |
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| 71 | |
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| 72 | ! 1. Change of geometry |
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| 73 | ! Increase of dz3d(2) thickness : dz3d(2) = dz3d(2)+dzdep |
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| 74 | ! Warning : no change for dz(2) |
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| 75 | !--------------------------------------------------------- |
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| 76 | dz3d(1:jpoce,2) = dz3d(1:jpoce,2) + dzdep(1:jpoce) |
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| 77 | |
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| 78 | ! New values for volw3d(:,2) and vols3d(:,2) |
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| 79 | ! Warning : no change neither for volw(2) nor vols(2) |
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| 80 | !------------------------------------------------------ |
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| 81 | volw3d(1:jpoce,2) = dz3d(1:jpoce,2) * por(2) |
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| 82 | vols3d(1:jpoce,2) = dz3d(1:jpoce,2) * por1(2) |
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| 83 | |
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| 84 | ! 2. Change of previous solid fractions (due to volum changes) for k=2 |
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| 85 | !--------------------------------------------------------------------- |
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| 86 | |
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| 87 | DO js = 1, jpsol |
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| 88 | DO ji = 1, jpoce |
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| 89 | solcp(ji,2,js) = solcp(ji,2,js) * dz(2) / dz3d(ji,2) |
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| 90 | ENDDO |
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| 91 | END DO |
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| 92 | |
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| 93 | ! 3. New solid fractions (including solid rain fractions) for k=2 |
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| 94 | !------------------------------------------------------------------ |
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| 95 | DO js = 1, jpsol |
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| 96 | DO ji = 1, jpoce |
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| 97 | IF (raintg(ji) .ne. 0) THEN |
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| 98 | solcp(ji,2,js) = solcp(ji,2,js) + & |
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| 99 | & ( rainrg(ji,js) / raintg(ji) ) * ( dzdep(ji) / dz3d(ji,2) ) |
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| 100 | ! rainrm are temporary cancel |
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| 101 | rainrm(ji,js) = 0. |
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| 102 | ENDIF |
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| 103 | END DO |
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| 104 | ENDDO |
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| 105 | |
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| 106 | ! 4. Adjustment of bottom water concen.(pwcp(1)): |
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| 107 | ! We impose that pwcp(2) is constant. Including dzdep in dz3d(:,2) we assume |
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| 108 | ! that dzdep has got a porosity of por(2). So pore water volum of jk=2 increase. |
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| 109 | ! To keep pwcp(2) cste we must compensate this "increase" by a slight adjusment |
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| 110 | ! of bottom water concentration. |
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| 111 | ! This adjustment is compensate at the end of routine |
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| 112 | !------------------------------------------------------------- |
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| 113 | DO jw = 1, jpwat |
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| 114 | DO ji = 1, jpoce |
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| 115 | pwcp(ji,1,jw) = pwcp(ji,1,jw) - & |
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| 116 | & pwcp(ji,2,jw) * dzdep(ji) * por(2) / ( dzkbot(ji) + rtrn ) |
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| 117 | END DO |
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| 118 | ENDDO |
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| 119 | |
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| 120 | zadsnh4 = 1.0 / ( 1.0 + adsnh4 ) |
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| 121 | |
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| 122 | ! -------------------------------------------------- |
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| 123 | ! Computation of the diffusivities |
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| 124 | ! -------------------------------------------------- |
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| 125 | |
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| 126 | DO js = 1, jpwat |
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| 127 | DO jk = 1, jpksed |
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| 128 | DO ji = 1, jpoce |
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| 129 | diff(ji,jk,js) = ( diff1(js) + diff2(js) * temp(ji) ) / ( 1.0 - 2.0 * log( por(jk) ) ) |
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| 130 | END DO |
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| 131 | END DO |
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| 132 | END DO |
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| 133 | |
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| 134 | ! Impact of bioirrigation and adsorption on diffusion |
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| 135 | ! --------------------------------------------------- |
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| 136 | |
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| 137 | diff(:,:,jwnh4) = diff(:,:,jwnh4) * ( 1.0 + irrig(:,:) ) * zadsnh4 |
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| 138 | diff(:,:,jwsil) = diff(:,:,jwsil) * ( 1.0 + irrig(:,:) ) |
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| 139 | diff(:,:,jwoxy) = diff(:,:,jwoxy) * ( 1.0 + irrig(:,:) ) |
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| 140 | diff(:,:,jwdic) = diff(:,:,jwdic) * ( 1.0 + irrig(:,:) ) |
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| 141 | diff(:,:,jwno3) = diff(:,:,jwno3) * ( 1.0 + irrig(:,:) ) |
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| 142 | diff(:,:,jwpo4) = diff(:,:,jwpo4) * ( 1.0 + irrig(:,:) ) |
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| 143 | diff(:,:,jwalk) = diff(:,:,jwalk) * ( 1.0 + irrig(:,:) ) |
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| 144 | diff(:,:,jwh2s) = diff(:,:,jwh2s) * ( 1.0 + irrig(:,:) ) |
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| 145 | diff(:,:,jwso4) = diff(:,:,jwso4) * ( 1.0 + irrig(:,:) ) |
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| 146 | diff(:,:,jwfe2) = diff(:,:,jwfe2) * ( 1.0 + 0.2 * irrig(:,:) ) |
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| 147 | |
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| 148 | DO jnt = 1, nrseddt |
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| 149 | CALL sed_diff( kt, jnt ) ! 1st pass in diffusion to get values at t+1/2 |
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| 150 | CALL sed_dsr ( kt, jnt ) ! Dissolution reaction |
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| 151 | CALL sed_diff( kt, jnt ) ! 2nd pass in diffusion to get values at t+1 |
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| 152 | END DO |
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| 153 | |
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| 154 | |
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| 155 | IF( ln_timing ) CALL timing_stop('sed_org') |
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| 156 | ! |
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| 157 | END SUBROUTINE sed_org |
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| 158 | |
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| 159 | END MODULE sedorg |
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