| 1 | Subroutine aeropacity(ngrid,nlayer,nq,pplay,pplev,pq, & |
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| 2 | aerosol,reffrad,QREFvis3d,QREFir3d,tau_col,cloudfrac,totcloudfrac,clearsky) |
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| 3 | |
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| 4 | use radinc_h, only : L_TAUMAX,naerkind |
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| 5 | use aerosol_mod |
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| 6 | USE comgeomfi_h |
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| 7 | USE tracer_h, only: noms,rho_co2,rho_ice |
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| 8 | use comcstfi_mod, only: g |
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| 9 | use callkeys_mod, only: aerofixco2,aerofixh2o,kastprof,cloudlvl, & |
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| 10 | CLFvarying,CLFfixval,dusttau, & |
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| 11 | pres_bottom_tropo,pres_top_tropo,obs_tau_col_tropo, & |
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| 12 | pres_bottom_strato,pres_top_strato,obs_tau_col_strato |
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| 13 | |
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| 14 | implicit none |
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| 15 | |
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| 16 | !================================================================== |
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| 17 | ! |
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| 18 | ! Purpose |
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| 19 | ! ------- |
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| 20 | ! Compute aerosol optical depth in each gridbox. |
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| 21 | ! |
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| 22 | ! Authors |
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| 23 | ! ------- |
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| 24 | ! F. Forget |
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| 25 | ! F. Montmessin (water ice scheme) |
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| 26 | ! update J.-B. Madeleine (2008) |
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| 27 | ! dust removal, simplification by Robin Wordsworth (2009) |
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| 28 | ! |
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| 29 | ! Input |
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| 30 | ! ----- |
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| 31 | ! ngrid Number of horizontal gridpoints |
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| 32 | ! nlayer Number of layers |
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| 33 | ! nq Number of tracers |
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| 34 | ! pplev Pressure (Pa) at each layer boundary |
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| 35 | ! pq Aerosol mixing ratio |
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| 36 | ! reffrad(ngrid,nlayer,naerkind) Aerosol effective radius |
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| 37 | ! QREFvis3d(ngrid,nlayer,naerkind) \ 3d extinction coefficients |
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| 38 | ! QREFir3d(ngrid,nlayer,naerkind) / at reference wavelengths |
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| 39 | ! |
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| 40 | ! Output |
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| 41 | ! ------ |
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| 42 | ! aerosol Aerosol optical depth in layer l, grid point ig |
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| 43 | ! tau_col Total column optical depth at grid point ig |
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| 44 | ! |
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| 45 | !======================================================================= |
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| 46 | |
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| 47 | INTEGER,INTENT(IN) :: ngrid ! number of atmospheric columns |
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| 48 | INTEGER,INTENT(IN) :: nlayer ! number of atmospheric layers |
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| 49 | INTEGER,INTENT(IN) :: nq ! number of tracers |
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| 50 | REAL,INTENT(IN) :: pplay(ngrid,nlayer) ! mid-layer pressure (Pa) |
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| 51 | REAL,INTENT(IN) :: pplev(ngrid,nlayer+1) ! inter-layer pressure (Pa) |
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| 52 | REAL,INTENT(IN) :: pq(ngrid,nlayer,nq) ! tracers (.../kg_of_air) |
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| 53 | REAL,INTENT(OUT) :: aerosol(ngrid,nlayer,naerkind) ! aerosol optical depth |
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| 54 | REAL,INTENT(IN) :: reffrad(ngrid,nlayer,naerkind) ! aerosol effective radius |
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| 55 | REAL,INTENT(IN) :: QREFvis3d(ngrid,nlayer,naerkind) ! extinction coefficient in the visible |
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| 56 | REAL,INTENT(IN) :: QREFir3d(ngrid,nlayer,naerkind) |
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| 57 | REAL,INTENT(OUT):: tau_col(ngrid) !column integrated visible optical depth |
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| 58 | ! BENJAMIN MODIFS |
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| 59 | real,intent(in) :: cloudfrac(ngrid,nlayer) ! cloud fraction |
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| 60 | real,intent(out) :: totcloudfrac(ngrid) ! total cloud fraction |
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| 61 | logical,intent(in) :: clearsky |
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| 62 | |
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| 63 | real aerosol0 |
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| 64 | |
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| 65 | INTEGER l,ig,iq,iaer |
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| 66 | |
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| 67 | LOGICAL,SAVE :: firstcall=.true. |
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| 68 | !$OMP THREADPRIVATE(firstcall) |
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| 69 | REAL CBRT |
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| 70 | EXTERNAL CBRT |
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| 71 | |
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| 72 | INTEGER,SAVE :: i_co2ice=0 ! co2 ice |
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| 73 | INTEGER,SAVE :: i_h2oice=0 ! water ice |
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| 74 | !$OMP THREADPRIVATE(i_co2ice,i_h2oice) |
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| 75 | CHARACTER(LEN=20) :: tracername ! to temporarily store text |
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| 76 | |
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| 77 | ! for fixed dust profiles |
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| 78 | real topdust, expfactor, zp |
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| 79 | REAL taudusttmp(ngrid) ! Temporary dust opacity used before scaling |
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| 80 | REAL tauh2so4tmp(ngrid) ! Temporary h2so4 opacity used before scaling |
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| 81 | |
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| 82 | real CLFtot |
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| 83 | |
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| 84 | ! identify tracers |
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| 85 | IF (firstcall) THEN |
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| 86 | |
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| 87 | write(*,*) "Tracers found in aeropacity:" |
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| 88 | do iq=1,nq |
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| 89 | tracername=noms(iq) |
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| 90 | if (tracername.eq."co2_ice") then |
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| 91 | i_co2ice=iq |
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| 92 | write(*,*) "i_co2ice=",i_co2ice |
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| 93 | |
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| 94 | endif |
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| 95 | if (tracername.eq."h2o_ice") then |
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| 96 | i_h2oice=iq |
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| 97 | write(*,*) "i_h2oice=",i_h2oice |
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| 98 | endif |
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| 99 | enddo |
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| 100 | |
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| 101 | if (noaero) then |
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| 102 | print*, "No active aerosols found in aeropacity" |
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| 103 | else |
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| 104 | print*, "If you would like to use aerosols, make sure any old" |
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| 105 | print*, "start files are updated in newstart using the option" |
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| 106 | print*, "q=0" |
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| 107 | write(*,*) "Active aerosols found in aeropacity:" |
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| 108 | endif |
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| 109 | |
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| 110 | if ((iaero_co2.ne.0).and.(.not.noaero)) then |
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| 111 | print*, 'iaero_co2= ',iaero_co2 |
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| 112 | endif |
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| 113 | if (iaero_h2o.ne.0) then |
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| 114 | print*,'iaero_h2o= ',iaero_h2o |
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| 115 | endif |
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| 116 | if (iaero_dust.ne.0) then |
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| 117 | print*,'iaero_dust= ',iaero_dust |
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| 118 | endif |
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| 119 | if (iaero_h2so4.ne.0) then |
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| 120 | print*,'iaero_h2so4= ',iaero_h2so4 |
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| 121 | endif |
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| 122 | if (iaero_back2lay.ne.0) then |
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| 123 | print*,'iaero_back2lay= ',iaero_back2lay |
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| 124 | endif |
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| 125 | |
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| 126 | firstcall=.false. |
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| 127 | ENDIF ! of IF (firstcall) |
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| 128 | |
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| 129 | |
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| 130 | ! --------------------------------------------------------- |
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| 131 | !================================================================== |
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| 132 | ! CO2 ice aerosols |
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| 133 | !================================================================== |
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| 134 | |
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| 135 | if (iaero_co2.ne.0) then |
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| 136 | iaer=iaero_co2 |
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| 137 | ! 1. Initialization |
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| 138 | aerosol(1:ngrid,1:nlayer,iaer)=0.0 |
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| 139 | ! 2. Opacity calculation |
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| 140 | if (noaero) then ! aerosol set to zero |
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| 141 | aerosol(1:ngrid,1:nlayer,iaer)=0.0 |
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| 142 | elseif (aerofixco2.or.(i_co2ice.eq.0)) then ! CO2 ice cloud prescribed |
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| 143 | aerosol(1:ngrid,1:nlayer,iaer)=1.e-9 |
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| 144 | !aerosol(1:ngrid,12,iaer)=4.0 ! single cloud layer option |
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| 145 | else |
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| 146 | DO ig=1, ngrid |
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| 147 | DO l=1,nlayer-1 ! to stop the rad tran bug |
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| 148 | |
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| 149 | aerosol0 = & |
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| 150 | ( 0.75 * QREFvis3d(ig,l,iaer) / & |
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| 151 | ( rho_co2 * reffrad(ig,l,iaer) ) ) * & |
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| 152 | ( pq(ig,l,i_co2ice) + 1.E-9 ) * & |
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| 153 | ( pplev(ig,l) - pplev(ig,l+1) ) / g |
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| 154 | aerosol0 = max(aerosol0,1.e-9) |
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| 155 | aerosol0 = min(aerosol0,L_TAUMAX) |
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| 156 | aerosol(ig,l,iaer) = aerosol0 |
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| 157 | ! aerosol(ig,l,iaer) = 0.0 |
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| 158 | ! print*, aerosol(ig,l,iaer) |
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| 159 | ! using cloud fraction |
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| 160 | ! aerosol(ig,l,iaer) = -log(1 - CLF + CLF*exp(-aerosol0/CLF)) |
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| 161 | ! aerosol(ig,l,iaer) = min(aerosol(ig,l,iaer),L_TAUMAX) |
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| 162 | |
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| 163 | |
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| 164 | ENDDO |
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| 165 | ENDDO |
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| 166 | end if ! if fixed or varying |
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| 167 | end if ! if CO2 aerosols |
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| 168 | !================================================================== |
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| 169 | ! Water ice / liquid |
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| 170 | !================================================================== |
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| 171 | |
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| 172 | if (iaero_h2o.ne.0) then |
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| 173 | iaer=iaero_h2o |
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| 174 | ! 1. Initialization |
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| 175 | aerosol(1:ngrid,1:nlayer,iaer)=0.0 |
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| 176 | ! 2. Opacity calculation |
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| 177 | if (aerofixh2o.or.(i_h2oice.eq.0).or.clearsky) then |
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| 178 | aerosol(1:ngrid,1:nlayer,iaer) =1.e-9 |
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| 179 | |
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| 180 | ! put cloud at cloudlvl |
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| 181 | if(kastprof.and.(cloudlvl.ne.0.0))then |
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| 182 | ig=1 |
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| 183 | do l=1,nlayer |
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| 184 | if(int(cloudlvl).eq.l)then |
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| 185 | !if(cloudlvl.gt.(pplay(ig,l)/pplev(ig,1)))then |
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| 186 | print*,'Inserting cloud at level ',l |
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| 187 | !aerosol(ig,l,iaer)=10.0 |
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| 188 | |
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| 189 | rho_ice=920.0 |
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| 190 | |
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| 191 | ! the Kasting approximation |
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| 192 | aerosol(ig,l,iaer) = & |
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| 193 | ( 0.75 * QREFvis3d(ig,l,iaer) / & |
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| 194 | ( rho_ice * reffrad(ig,l,iaer) ) ) * & |
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| 195 | !( pq(ig,l,i_h2oice) + 1.E-9 ) * & |
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| 196 | ( 4.0e-4 + 1.E-9 ) * & |
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| 197 | ( pplev(ig,l) - pplev(ig,l+1) ) / g |
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| 198 | |
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| 199 | |
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| 200 | open(115,file='clouds.out',form='formatted') |
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| 201 | write(115,*) l,aerosol(ig,l,iaer) |
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| 202 | close(115) |
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| 203 | |
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| 204 | return |
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| 205 | endif |
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| 206 | end do |
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| 207 | |
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| 208 | call abort |
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| 209 | endif |
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| 210 | |
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| 211 | else |
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| 212 | |
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| 213 | do ig=1, ngrid |
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| 214 | do l=1,nlayer-1 ! to stop the rad tran bug |
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| 215 | |
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| 216 | aerosol(ig,l,iaer) = & !modification by BC |
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| 217 | ( 0.75 * QREFvis3d(ig,l,iaer) / & |
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| 218 | ( rho_ice * reffrad(ig,l,iaer) ) ) * & |
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| 219 | ! pq(ig,l,i_h2oice) * & !JL I dropped the +1e-9 here to have the same |
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| 220 | !( pplev(ig,l) - pplev(ig,l+1) ) / g ! opacity in the clearsky=true and the |
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| 221 | ! clear=false/pq=0 case |
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| 222 | ( pq(ig,l,i_h2oice) + 1.E-9 ) * & ! Doing this makes the code unstable, so I have restored it (RW) |
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| 223 | ( pplev(ig,l) - pplev(ig,l+1) ) / g |
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| 224 | |
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| 225 | enddo |
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| 226 | enddo |
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| 227 | |
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| 228 | if(CLFvarying)then |
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| 229 | call totalcloudfrac(ngrid,nlayer,nq,cloudfrac,totcloudfrac,pplev,pq,aerosol(1,1,iaer)) |
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| 230 | do ig=1, ngrid |
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| 231 | do l=1,nlayer-1 ! to stop the rad tran bug |
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| 232 | CLFtot = max(totcloudfrac(ig),0.01) |
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| 233 | aerosol(ig,l,iaer)=aerosol(ig,l,iaer)/CLFtot |
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| 234 | aerosol(ig,l,iaer) = max(aerosol(ig,l,iaer),1.e-9) |
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| 235 | enddo |
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| 236 | enddo |
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| 237 | else |
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| 238 | do ig=1, ngrid |
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| 239 | do l=1,nlayer-1 ! to stop the rad tran bug |
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| 240 | CLFtot = CLFfixval |
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| 241 | aerosol(ig,l,iaer)=aerosol(ig,l,iaer)/CLFtot |
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| 242 | aerosol(ig,l,iaer) = max(aerosol(ig,l,iaer),1.e-9) |
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| 243 | enddo |
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| 244 | enddo |
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| 245 | end if!(CLFvarying) |
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| 246 | endif !(aerofixed.or.(i_h2oice.eq.0).or.clearsky) |
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| 247 | |
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| 248 | end if ! End if h2o aerosol |
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| 249 | |
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| 250 | !================================================================== |
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| 251 | ! Dust |
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| 252 | !================================================================== |
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| 253 | if (iaero_dust.ne.0) then |
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| 254 | iaer=iaero_dust |
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| 255 | ! 1. Initialization |
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| 256 | aerosol(1:ngrid,1:nlayer,iaer)=0.0 |
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| 257 | |
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| 258 | topdust=30.0 ! km (used to be 10.0 km) LK |
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| 259 | |
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| 260 | ! 2. Opacity calculation |
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| 261 | |
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| 262 | ! expfactor=0. |
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| 263 | DO l=1,nlayer-1 |
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| 264 | DO ig=1,ngrid |
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| 265 | ! Typical mixing ratio profile |
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| 266 | |
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| 267 | zp=(pplev(ig,1)/pplay(ig,l))**(70./topdust) |
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| 268 | expfactor=max(exp(0.007*(1.-max(zp,1.))),1.e-3) |
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| 269 | |
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| 270 | ! Vertical scaling function |
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| 271 | aerosol(ig,l,iaer)= (pplev(ig,l)-pplev(ig,l+1)) & |
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| 272 | *expfactor |
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| 273 | |
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| 274 | |
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| 275 | ENDDO |
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| 276 | ENDDO |
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| 277 | |
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| 278 | ! Rescaling each layer to reproduce the choosen (or assimilated) |
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| 279 | ! dust extinction opacity at visible reference wavelength, which |
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| 280 | ! is scaled to the surface pressure pplev(ig,1) |
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| 281 | |
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| 282 | taudusttmp(1:ngrid)=0. |
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| 283 | DO l=1,nlayer |
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| 284 | DO ig=1,ngrid |
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| 285 | taudusttmp(ig) = taudusttmp(ig) & |
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| 286 | + aerosol(ig,l,iaer) |
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| 287 | ENDDO |
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| 288 | ENDDO |
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| 289 | DO l=1,nlayer-1 |
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| 290 | DO ig=1,ngrid |
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| 291 | aerosol(ig,l,iaer) = max(1E-20, & |
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| 292 | dusttau & |
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| 293 | * pplev(ig,1) / pplev(ig,1) & |
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| 294 | * aerosol(ig,l,iaer) & |
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| 295 | / taudusttmp(ig)) |
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| 296 | |
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| 297 | ENDDO |
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| 298 | ENDDO |
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| 299 | end if ! If dust aerosol |
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| 300 | |
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| 301 | !================================================================== |
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| 302 | ! H2SO4 |
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| 303 | !================================================================== |
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| 304 | ! added by LK |
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| 305 | if (iaero_h2so4.ne.0) then |
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| 306 | iaer=iaero_h2so4 |
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| 307 | |
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| 308 | ! 1. Initialization |
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| 309 | aerosol(1:ngrid,1:nlayer,iaer)=0.0 |
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| 310 | |
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| 311 | |
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| 312 | ! 2. Opacity calculation |
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| 313 | |
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| 314 | ! expfactor=0. |
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| 315 | DO l=1,nlayer-1 |
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| 316 | DO ig=1,ngrid |
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| 317 | ! Typical mixing ratio profile |
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| 318 | |
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| 319 | zp=(pplev(ig,1)/pplay(ig,l))**(70./30) !emulating topdust |
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| 320 | expfactor=max(exp(0.007*(1.-max(zp,1.))),1.e-3) |
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| 321 | |
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| 322 | ! Vertical scaling function |
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| 323 | aerosol(ig,l,iaer)= (pplev(ig,l)-pplev(ig,l+1))*expfactor |
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| 324 | |
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| 325 | ENDDO |
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| 326 | ENDDO |
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| 327 | tauh2so4tmp(1:ngrid)=0. |
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| 328 | DO l=1,nlayer |
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| 329 | DO ig=1,ngrid |
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| 330 | tauh2so4tmp(ig) = tauh2so4tmp(ig) + aerosol(ig,l,iaer) |
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| 331 | ENDDO |
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| 332 | ENDDO |
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| 333 | DO l=1,nlayer-1 |
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| 334 | DO ig=1,ngrid |
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| 335 | aerosol(ig,l,iaer) = max(1E-20, & |
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| 336 | 1 & |
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| 337 | * pplev(ig,1) / pplev(ig,1) & |
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| 338 | * aerosol(ig,l,iaer) & |
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| 339 | / tauh2so4tmp(ig)) |
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| 340 | |
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| 341 | ENDDO |
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| 342 | ENDDO |
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| 343 | |
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| 344 | ! 1/700. is assuming a "sulfurtau" of 1 |
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| 345 | ! Sulfur aerosol routine to be improved. |
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| 346 | ! aerosol0 = & |
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| 347 | ! ( 0.75 * QREFvis3d(ig,l,iaer) / & |
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| 348 | ! ( rho_h2so4 * reffrad(ig,l,iaer) ) ) * & |
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| 349 | ! ( pq(ig,l,i_h2so4) + 1.E-9 ) * & |
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| 350 | ! ( pplev(ig,l) - pplev(ig,l+1) ) / g |
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| 351 | ! aerosol0 = max(aerosol0,1.e-9) |
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| 352 | ! aerosol0 = min(aerosol0,L_TAUMAX) |
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| 353 | ! aerosol(ig,l,iaer) = aerosol0 |
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| 354 | |
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| 355 | ! ENDDO |
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| 356 | ! ENDDO |
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| 357 | end if |
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| 358 | |
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| 359 | |
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| 360 | ! --------------------------------------------------------- |
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| 361 | !================================================================== |
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| 362 | ! Two-layer aerosols (unknown composition) |
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| 363 | ! S. Guerlet (2013) |
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| 364 | !================================================================== |
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| 365 | |
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| 366 | if (iaero_back2lay .ne.0) then |
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| 367 | iaer=iaero_back2lay |
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| 368 | ! 1. Initialization |
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| 369 | aerosol(1:ngrid,1:nlayer,iaer)=0.0 |
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| 370 | ! 2. Opacity calculation |
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| 371 | DO ig=1,ngrid |
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| 372 | DO l=1,nlayer-1 |
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| 373 | aerosol(ig,l,iaer) = ( pplev(ig,l) - pplev(ig,l+1) ) |
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| 374 | !! 1. below tropospheric layer: no aerosols |
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| 375 | IF (pplev(ig,l) .gt. pres_bottom_tropo) THEN |
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| 376 | aerosol(ig,l,iaer) = 0.*aerosol(ig,l,iaer) |
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| 377 | !! 2. tropo layer |
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| 378 | ELSEIF (pplev(ig,l) .le. pres_bottom_tropo .and. pplev(ig,l) .ge. pres_top_tropo) THEN |
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| 379 | aerosol(ig,l,iaer) = obs_tau_col_tropo*aerosol(ig,l,iaer) |
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| 380 | !! 3. linear transition |
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| 381 | ELSEIF (pplev(ig,l) .lt. pres_top_tropo .and. pplev(ig,l) .gt. pres_bottom_strato) THEN |
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| 382 | expfactor=log(obs_tau_col_strato/obs_tau_col_tropo)/log(pres_bottom_strato/pres_top_tropo) |
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| 383 | aerosol(ig,l,iaer)= obs_tau_col_tropo*((pplev(ig,l)/pres_top_tropo)**expfactor)*aerosol(ig,l,iaer)/1.5 |
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| 384 | !! 4. strato layer |
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| 385 | ELSEIF (pplev(ig,l) .le. pres_bottom_strato .and. pplev(ig,l) .gt. pres_top_strato) THEN |
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| 386 | aerosol(ig,l,iaer)= obs_tau_col_strato*aerosol(ig,l,iaer) |
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| 387 | !! 5. above strato layer: no aerosols |
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| 388 | ELSEIF (pplev(ig,l) .lt. pres_top_strato) THEN |
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| 389 | aerosol(ig,l,iaer) = 0.*aerosol(ig,l,iaer) |
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| 390 | ENDIF |
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| 391 | ENDDO |
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| 392 | ENDDO |
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| 393 | |
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| 394 | ! 3. Re-normalize to observed total column |
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| 395 | tau_col(:)=0.0 |
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| 396 | DO l=1,nlayer |
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| 397 | DO ig=1,ngrid |
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| 398 | tau_col(ig) = tau_col(ig) & |
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| 399 | + aerosol(ig,l,iaer)/(obs_tau_col_tropo+obs_tau_col_strato) |
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| 400 | ENDDO |
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| 401 | ENDDO |
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| 402 | |
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| 403 | DO ig=1,ngrid |
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| 404 | DO l=1,nlayer-1 |
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| 405 | aerosol(ig,l,iaer)=aerosol(ig,l,iaer)/tau_col(ig) |
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| 406 | ENDDO |
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| 407 | ENDDO |
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| 408 | |
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| 409 | |
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| 410 | end if ! if Two-layer aerosols |
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| 411 | |
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| 412 | |
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| 413 | ! -------------------------------------------------------------------------- |
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| 414 | ! Column integrated visible optical depth in each point (used for diagnostic) |
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| 415 | |
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| 416 | tau_col(:)=0.0 |
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| 417 | do iaer = 1, naerkind |
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| 418 | do l=1,nlayer |
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| 419 | do ig=1,ngrid |
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| 420 | tau_col(ig) = tau_col(ig) + aerosol(ig,l,iaer) |
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| 421 | end do |
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| 422 | end do |
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| 423 | end do |
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| 424 | |
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| 425 | do ig=1,ngrid |
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| 426 | do l=1,nlayer |
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| 427 | do iaer = 1, naerkind |
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| 428 | if(aerosol(ig,l,iaer).gt.1.e3)then |
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| 429 | print*,'WARNING: aerosol=',aerosol(ig,l,iaer) |
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| 430 | print*,'at ig=',ig,', l=',l,', iaer=',iaer |
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| 431 | print*,'QREFvis3d=',QREFvis3d(ig,l,iaer) |
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| 432 | print*,'reffrad=',reffrad(ig,l,iaer) |
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| 433 | endif |
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| 434 | end do |
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| 435 | end do |
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| 436 | end do |
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| 437 | |
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| 438 | do ig=1,ngrid |
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| 439 | if(tau_col(ig).gt.1.e3)then |
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| 440 | print*,'WARNING: tau_col=',tau_col(ig) |
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| 441 | print*,'at ig=',ig |
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| 442 | print*,'aerosol=',aerosol(ig,:,:) |
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| 443 | print*,'QREFvis3d=',QREFvis3d(ig,:,:) |
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| 444 | print*,'reffrad=',reffrad(ig,:,:) |
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| 445 | endif |
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| 446 | end do |
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| 447 | return |
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| 448 | end subroutine aeropacity |
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| 449 | |
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