| 1 | SUBROUTINE callsedim(ngrid,nlay, ptimestep, |
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| 2 | & pplev,zlev, pt, pdt, |
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| 3 | & pq, pdqfi, pdqsed,pdqs_sed,nq) |
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| 4 | |
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| 5 | use radinc_h, only : naerkind |
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| 6 | use radii_mod, only: h2o_reffrad |
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| 7 | use aerosol_mod, only : iaero_h2o |
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| 8 | USE tracer_h, only : igcm_co2_ice,igcm_h2o_ice,radius,rho_q |
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| 9 | |
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| 10 | IMPLICIT NONE |
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| 11 | |
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| 12 | !================================================================== |
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| 13 | ! |
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| 14 | ! Purpose |
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| 15 | ! ------- |
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| 16 | ! Calculates sedimentation of aerosols depending on their |
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| 17 | ! density and radius. |
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| 18 | ! |
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| 19 | ! Authors |
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| 20 | ! ------- |
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| 21 | ! F. Forget (1999) |
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| 22 | ! Tracer generalisation by E. Millour (2009) |
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| 23 | ! |
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| 24 | !================================================================== |
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| 25 | |
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| 26 | c----------------------------------------------------------------------- |
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| 27 | c declarations: |
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| 28 | c ------------- |
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| 29 | |
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| 30 | #include "dimensions.h" |
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| 31 | #include "dimphys.h" |
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| 32 | #include "comcstfi.h" |
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| 33 | #include "callkeys.h" |
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| 34 | |
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| 35 | c arguments: |
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| 36 | c ---------- |
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| 37 | |
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| 38 | integer,intent(in):: ngrid ! number of horizontal grid points |
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| 39 | integer,intent(in):: nlay ! number of atmospheric layers |
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| 40 | real,intent(in):: ptimestep ! physics time step (s) |
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| 41 | real,intent(in):: pplev(ngrid,nlay+1) ! pressure at inter-layers (Pa) |
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| 42 | real,intent(in):: pt(ngrid,nlay) ! temperature at mid-layer (K) |
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| 43 | real,intent(in):: pdt(ngrid,nlay) ! tendency on temperature |
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| 44 | real,intent(in):: zlev(ngrid,nlay+1) ! altitude at layer boundaries |
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| 45 | integer,intent(in) :: nq ! number of tracers |
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| 46 | real,intent(in) :: pq(ngrid,nlay,nq) ! tracers (kg/kg) |
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| 47 | real,intent(in) :: pdqfi(ngrid,nlay,nq) ! tendency on tracers before |
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| 48 | ! sedimentation (kg/kg.s-1) |
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| 49 | |
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| 50 | real,intent(out) :: pdqsed(ngrid,nlay,nq) ! tendency due to sedimentation (kg/kg.s-1) |
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| 51 | real,intent(out) :: pdqs_sed(ngrid,nq) ! flux at surface (kg.m-2.s-1) |
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| 52 | |
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| 53 | c local: |
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| 54 | c ------ |
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| 55 | |
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| 56 | INTEGER l,ig, iq |
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| 57 | |
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| 58 | ! for particles with varying radii: |
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| 59 | real reffrad(ngrid,nlay,naerkind) ! particle radius (m) |
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| 60 | real nueffrad(ngrid,nlay,naerkind) ! aerosol effective radius variance |
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| 61 | |
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| 62 | real zqi(ngrid,nlay,nq) ! to locally store tracers |
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| 63 | real zt(ngrid,nlay) ! to locally store temperature (K) |
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| 64 | real masse (ngrid,nlay) ! Layer mass (kg.m-2) |
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| 65 | real epaisseur (ngrid,nlay) ! Layer thickness (m) |
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| 66 | real wq(ngrid,nlay+1) ! displaced tracer mass (kg.m-2) |
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| 67 | c real dens(ngrid,nlayermx) ! Mean density of the ice part. accounting for dust core |
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| 68 | |
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| 69 | |
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| 70 | LOGICAL,SAVE :: firstcall=.true. |
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| 71 | |
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| 72 | c ** un petit test de coherence |
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| 73 | c -------------------------- |
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| 74 | |
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| 75 | IF (firstcall) THEN |
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| 76 | firstcall=.false. |
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| 77 | ! add some tests on presence of required tracers/aerosols: |
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| 78 | if (water) then |
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| 79 | if (igcm_h2o_ice.eq.0) then |
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| 80 | write(*,*) "callsedim error: water=.true.", |
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| 81 | & " but igcm_h2o_ice=0" |
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| 82 | stop |
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| 83 | endif |
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| 84 | if (iaero_h2o.eq.0) then |
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| 85 | write(*,*) "callsedim error: water=.true.", |
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| 86 | & " but iaero_ho2=0" |
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| 87 | stop |
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| 88 | endif |
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| 89 | endif |
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| 90 | ENDIF ! of IF (firstcall) |
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| 91 | |
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| 92 | !======================================================================= |
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| 93 | ! Preliminary calculation of the layer characteristics |
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| 94 | ! (mass (kg.m-2), thickness (m), etc. |
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| 95 | |
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| 96 | do l=1,nlay |
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| 97 | do ig=1, ngrid |
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| 98 | masse(ig,l)=(pplev(ig,l) - pplev(ig,l+1)) /g |
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| 99 | epaisseur(ig,l)= zlev(ig,l+1) - zlev(ig,l) |
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| 100 | zt(ig,l)=pt(ig,l)+pdt(ig,l)*ptimestep |
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| 101 | end do |
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| 102 | end do |
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| 103 | |
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| 104 | !====================================================================== |
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| 105 | ! Calculate the transport due to sedimentation for each tracer |
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| 106 | ! [This has been rearranged by L. Kerber to allow the sedimentation |
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| 107 | ! of general tracers.] |
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| 108 | |
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| 109 | do iq=1,nq |
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| 110 | if((radius(iq).gt.1.e-9).and.(iq.ne.igcm_co2_ice)) then |
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| 111 | ! (no sedim for gases, and co2_ice sedim is done in condense_cloud) |
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| 112 | |
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| 113 | ! store locally updated tracers |
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| 114 | |
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| 115 | do l=1,nlay |
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| 116 | do ig=1, ngrid |
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| 117 | zqi(ig,l,iq)=pq(ig,l,iq)+pdqfi(ig,l,iq)*ptimestep |
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| 118 | enddo |
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| 119 | enddo ! of do l=1,nlay |
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| 120 | |
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| 121 | !====================================================================== |
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| 122 | ! Sedimentation |
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| 123 | !====================================================================== |
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| 124 | ! Water |
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| 125 | if (water.and.(iq.eq.igcm_h2o_ice)) then |
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| 126 | ! compute radii for h2o_ice |
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| 127 | call h2o_reffrad(ngrid,zqi(1,1,igcm_h2o_ice),zt, |
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| 128 | & reffrad(1,1,iaero_h2o),nueffrad(1,1,iaero_h2o)) |
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| 129 | ! call sedimentation for h2o_ice |
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| 130 | call newsedim(ngrid,nlay,ngrid*nlay,ptimestep, |
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| 131 | & pplev,masse,epaisseur,zt,reffrad(1,1,iaero_h2o), |
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| 132 | & rho_q(iq),zqi(1,1,igcm_h2o_ice),wq) |
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| 133 | |
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| 134 | ! General Case |
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| 135 | else |
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| 136 | call newsedim(ngrid,nlay,1,ptimestep, |
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| 137 | & pplev,masse,epaisseur,zt,radius(iq),rho_q(iq), |
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| 138 | & zqi(1,1,iq),wq) |
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| 139 | endif |
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| 140 | |
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| 141 | !======================================================================= |
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| 142 | ! Calculate the tendencies |
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| 143 | !====================================================================== |
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| 144 | |
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| 145 | do ig=1,ngrid |
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| 146 | ! Ehouarn: with new way of tracking tracers by name, this is simply |
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| 147 | pdqs_sed(ig,iq) = wq(ig,1)/ptimestep |
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| 148 | end do |
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| 149 | |
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| 150 | DO l = 1, nlay |
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| 151 | DO ig=1,ngrid |
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| 152 | pdqsed(ig,l,iq)=(zqi(ig,l,iq)- |
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| 153 | & (pq(ig,l,iq) + pdqfi(ig,l,iq)*ptimestep))/ptimestep |
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| 154 | ENDDO |
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| 155 | ENDDO |
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| 156 | endif ! of no gases no co2_ice |
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| 157 | enddo ! of do iq=1,nq |
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| 158 | return |
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| 159 | end |
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