| 1 | SUBROUTINE callsedim(ngrid,nlay, ptimestep, |
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| 2 | $ pplev,zlev, pt, |
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| 3 | & pq, pdqfi, pdqsed,pdqs_sed,nq) |
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| 4 | IMPLICIT NONE |
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| 5 | |
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| 6 | !================================================================== |
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| 7 | ! |
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| 8 | ! Purpose |
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| 9 | ! ------- |
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| 10 | ! Calculates sedimentation of aerosols depending on their |
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| 11 | ! density and radius. |
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| 12 | ! |
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| 13 | ! Authors |
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| 14 | ! ------- |
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| 15 | ! F. Forget (1999) |
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| 16 | ! Tracer generalisation by E. Millour (2009) |
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| 17 | ! |
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| 18 | !================================================================== |
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| 19 | |
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| 20 | c----------------------------------------------------------------------- |
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| 21 | c declarations: |
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| 22 | c ------------- |
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| 23 | |
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| 24 | #include "dimensions.h" |
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| 25 | #include "dimphys.h" |
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| 26 | #include "comcstfi.h" |
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| 27 | #include "tracer.h" |
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| 28 | #include "callkeys.h" |
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| 29 | |
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| 30 | #include "fisice.h" |
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| 31 | c |
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| 32 | c arguments: |
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| 33 | c ---------- |
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| 34 | |
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| 35 | INTEGER ngrid ! number of horizontal grid points |
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| 36 | INTEGER nlay ! number of atmospheric layers |
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| 37 | REAL ptimestep ! physics time step (s) |
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| 38 | REAL pplev(ngrid,nlay+1) ! pressure at inter-layers (Pa) |
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| 39 | REAL pt(ngrid,nlay) ! temperature at mid-layer (K) |
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| 40 | REAL zlev(ngrid,nlay+1) ! altitude at layer boundaries |
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| 41 | |
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| 42 | |
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| 43 | c Traceurs : |
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| 44 | integer nq ! number of tracers |
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| 45 | real pq(ngrid,nlay,nq) ! tracers (kg/kg) |
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| 46 | real pdqfi(ngrid,nlay,nq) ! tendency before sedimentation (kg/kg.s-1) |
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| 47 | real pdqsed(ngrid,nlay,nq) ! tendency due to sedimentation (kg/kg.s-1) |
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| 48 | real pdqs_sed(ngrid,nq) ! flux at surface (kg.m-2.s-1) |
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| 49 | |
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| 50 | c local: |
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| 51 | c ------ |
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| 52 | |
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| 53 | INTEGER l,ig, iq |
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| 54 | |
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| 55 | real zqi(ngridmx,nlayermx) ! to locally store tracers |
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| 56 | real masse (ngridmx,nlayermx) ! Layer mass (kg.m-2) |
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| 57 | real epaisseur (ngridmx,nlayermx) ! Layer thickness (m) |
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| 58 | real wq(ngridmx,nlayermx+1) ! displaced tracer mass (kg.m-2) |
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| 59 | c real dens(ngridmx,nlayermx) ! Mean density of the ice part. accounting for dust core |
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| 60 | real rfall(ngridmx,nlayermx) |
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| 61 | |
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| 62 | |
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| 63 | LOGICAL firstcall |
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| 64 | SAVE firstcall |
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| 65 | DATA firstcall/.true./ |
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| 66 | |
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| 67 | c ** un petit test de coherence |
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| 68 | c -------------------------- |
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| 69 | |
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| 70 | IF (firstcall) THEN |
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| 71 | IF(ngrid.NE.ngridmx) THEN |
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| 72 | PRINT*,'STOP dans callsedim' |
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| 73 | PRINT*,'probleme de dimensions :' |
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| 74 | PRINT*,'ngrid =',ngrid |
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| 75 | PRINT*,'ngridmx =',ngridmx |
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| 76 | STOP |
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| 77 | ENDIF |
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| 78 | |
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| 79 | firstcall=.false. |
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| 80 | ENDIF ! of IF (firstcall) |
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| 81 | |
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| 82 | !======================================================================= |
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| 83 | ! Preliminary calculation of the layer characteristics |
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| 84 | ! (mass (kg.m-2), thickness (m), etc. |
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| 85 | |
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| 86 | |
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| 87 | do l=1,nlay |
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| 88 | do ig=1, ngrid |
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| 89 | masse(ig,l)=(pplev(ig,l) - pplev(ig,l+1)) /g |
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| 90 | epaisseur(ig,l)= zlev(ig,l+1) - zlev(ig,l) |
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| 91 | end do |
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| 92 | end do |
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| 93 | |
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| 94 | do iq=1,nq |
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| 95 | if(radius(iq).gt.1.e-9) then ! no sedimentation for gases (defined by radius=0) |
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| 96 | |
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| 97 | ! The value of q is updated after the other parameterisations |
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| 98 | |
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| 99 | do l=1,nlay |
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| 100 | do ig=1,ngrid |
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| 101 | ! store locally updated tracers |
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| 102 | zqi(ig,l)=pq(ig,l,iq)+pdqfi(ig,l,iq)*ptimestep |
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| 103 | ! if (iceparty.and.(iq.eq.igcm_h2o_ice)) then |
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| 104 | if (iq.eq.igcm_h2o_ice) then |
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| 105 | c On affecte un rayon moyen aux poussieres a chaque altitude du type : |
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| 106 | c r(z)=r0*exp(-z/H) avec r0=0.8 micron et H=18 km. |
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| 107 | c '''''''''''''''''''''''''''''''''''''''''''''''' |
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| 108 | rfall(ig,l)=max( rice(ig,l)*1.5,rdust(ig,l) ) |
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| 109 | c modif FranckMM pour ameliorer cycle H2O: rfall= 20 microns |
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| 110 | rfall(ig,l)=min(rfall(ig,l),1.e-4) |
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| 111 | endif |
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| 112 | enddo |
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| 113 | enddo ! of do l=1,nlay |
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| 114 | |
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| 115 | !======================================================================= |
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| 116 | ! Calculate the transport due to sedimentation for each tracer |
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| 117 | |
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| 118 | if (iq.eq.igcm_h2o_ice) then |
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| 119 | !if (iceparty.and.(iq.eq.igcm_h2o_ice)) then |
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| 120 | call newsedim(ngrid,nlay,ngrid*nlay,ptimestep, |
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| 121 | & pplev,masse,epaisseur,pt,rfall,rho_q(iq),zqi,wq) |
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| 122 | else |
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| 123 | call newsedim(ngrid,nlay,1,ptimestep, |
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| 124 | & pplev,masse,epaisseur,pt,radius(iq),rho_q(iq),zqi,wq) |
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| 125 | endif |
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| 126 | |
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| 127 | !======================================================================= |
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| 128 | ! Calculate the tendencies |
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| 129 | |
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| 130 | do ig=1,ngrid |
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| 131 | ! Ehouarn: with new way of tracking tracers by name, this is simply |
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| 132 | pdqs_sed(ig,iq)=wq(ig,1)/ptimestep |
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| 133 | end do |
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| 134 | |
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| 135 | DO l = 1, nlay |
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| 136 | DO ig=1,ngrid |
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| 137 | pdqsed(ig,l,iq)=(zqi(ig,l)- |
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| 138 | $ (pq(ig,l,iq) + pdqfi(ig,l,iq)*ptimestep))/ptimestep |
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| 139 | ENDDO |
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| 140 | ENDDO |
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| 141 | |
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| 142 | endif ! of if(radius(iq).gt.1.e-9) |
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| 143 | enddo ! of do iq=1,nq |
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| 144 | |
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| 145 | RETURN |
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| 146 | END |
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| 147 | |
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