| 1 | module lwu_mod |
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| 2 | |
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| 3 | implicit none |
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| 4 | |
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| 5 | contains |
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| 6 | |
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| 7 | subroutine lwu (kdlon,kflev |
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| 8 | & ,dp,plev,tlay,aerosol |
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| 9 | & ,QIRsQREF3d,omegaIR3d,gIR3d |
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| 10 | & ,aer_t,co2_u,co2_up |
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| 11 | & ,tautotal,omegtotal,gtotal) |
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| 12 | |
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| 13 | c---------------------------------------------------------------------- |
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| 14 | c LWU computes - co2: longwave effective absorber amounts including |
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| 15 | c pressure and temperature effects |
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| 16 | c - aerosols: amounts for every band |
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| 17 | c transmission for bandes 1 and 2 of co2 |
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| 18 | c---------------------------------------------------------------------- |
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| 19 | |
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| 20 | c----------------------------------------------------------------------- |
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| 21 | c ATTENTION AUX UNITES: |
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| 22 | c le facteur 10*g fait passer des kg m-2 aux g cm-2 |
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| 23 | c----------------------------------------------------------------------- |
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| 24 | c! modif diffusion |
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| 25 | c! on ne change rien a la bande CO2 : les quantites d'absorbant CO2 |
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| 26 | c! sont multipliees par 1.66 |
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| 27 | c! pview= 1/cos(teta0)=1.66 |
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| 28 | c |
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| 29 | c Modif J.-B. Madeleine: Computing optical properties of dust and |
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| 30 | c water-ice crystals in each gridbox. Optical parameters of |
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| 31 | c water-ice clouds are convolved to crystal sizes predicted by |
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| 32 | c the microphysical scheme. |
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| 33 | c |
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| 34 | c MODIF : FF : removing the monster bug on water ice clouds 11/2010 |
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| 35 | c |
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| 36 | c MODIF : TN : corrected bug if very big water ice clouds 04/2012 |
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| 37 | c----------------------------------------------------------------------- |
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| 38 | |
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| 39 | use dimradmars_mod, only: ndlo2, nir, nuco2, ndlon, nflev |
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| 40 | use dimradmars_mod, only: naerkind |
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| 41 | use yomlw_h, only: nlaylte, tref, at, bt, cst_voigt |
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| 42 | use comcstfi_h, only: g |
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| 43 | implicit none |
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| 44 | |
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| 45 | c---------------------------------------------------------------------- |
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| 46 | c 0.1 arguments |
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| 47 | c --------- |
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| 48 | c inputs: |
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| 49 | c ------- |
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| 50 | integer,intent(in) :: kdlon ! part of ngrid |
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| 51 | integer,intent(in) :: kflev ! part of nalyer |
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| 52 | |
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| 53 | real,intent(in) :: dp(ndlo2,kflev) ! layer pressure thickness (Pa) |
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| 54 | real,intent(in) :: plev(ndlo2,kflev+1) ! level pressure (Pa) |
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| 55 | real,intent(in) :: tlay(ndlo2,kflev) ! layer temperature (K) |
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| 56 | real,intent(in) :: aerosol(ndlo2,kflev,naerkind) ! aerosol extinction optical depth |
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| 57 | c at reference wavelength "longrefvis" set |
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| 58 | c in dimradmars_mod , in each layer, for one of |
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| 59 | c the "naerkind" kind of aerosol optical properties. |
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| 60 | real,intent(in) :: QIRsQREF3d(ndlo2,kflev,nir,naerkind) ! 3d ext. coef. |
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| 61 | real,intent(in) :: omegaIR3d(ndlo2,kflev,nir,naerkind) ! 3d ssa |
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| 62 | real,intent(in) :: gIR3d(ndlo2,kflev,nir,naerkind) ! 3d assym. param. |
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| 63 | |
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| 64 | c outputs: |
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| 65 | c -------- |
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| 66 | real,intent(out) :: aer_t(ndlo2,nuco2,kflev+1) ! transmission (aer) |
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| 67 | real,intent(out) :: co2_u(ndlo2,nuco2,kflev+1) ! absorber amounts (co2) |
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| 68 | real,intent(out) :: co2_up(ndlo2,nuco2,kflev+1) ! idem scaled by the pressure (co2) |
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| 69 | |
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| 70 | real,intent(out) :: tautotal(ndlo2,kflev,nir) ! \ Total single scattering |
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| 71 | real,intent(out) :: omegtotal(ndlo2,kflev,nir) ! > properties (Addition of the |
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| 72 | real,intent(out) :: gtotal(ndlo2,kflev,nir) ! / NAERKIND aerosols properties) |
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| 73 | |
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| 74 | c---------------------------------------------------------------------- |
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| 75 | c 0.2 local arrays |
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| 76 | c ------------ |
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| 77 | |
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| 78 | integer jl,jk,jkl,ja,n |
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| 79 | |
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| 80 | real aer_a (ndlon,nir,nflev+1) ! absorber amounts (aer) ABSORPTION |
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| 81 | real co2c ! co2 concentration (pa/pa) |
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| 82 | real pview ! cosecant of viewing angle |
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| 83 | real pref ! reference pressure (1013 mb = 101325 Pa) |
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| 84 | real tx,tx2 |
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| 85 | real phi (ndlon,nuco2) |
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| 86 | real psi (ndlon,nuco2) |
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| 87 | real plev2 (ndlon,nflev+1) |
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| 88 | real zzz |
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| 89 | |
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| 90 | real ray,coefsize,coefsizew,coefsizeg |
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| 91 | |
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| 92 | c************************************************************************ |
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| 93 | c---------------------------------------------------------------------- |
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| 94 | c 0.3 Initialisation |
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| 95 | c ------------- |
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| 96 | |
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| 97 | pview = 1.66 |
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| 98 | co2c = 0.95 |
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| 99 | pref = 101325. |
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| 100 | |
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| 101 | do jk=1,nlaylte+1 |
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| 102 | do jl=1,kdlon |
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| 103 | plev2(jl,jk)=plev(jl,jk)*plev(jl,jk) |
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| 104 | enddo |
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| 105 | enddo |
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| 106 | |
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| 107 | c---------------------------------------------------------------------- |
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| 108 | c Computing TOTAL single scattering parameters by adding properties of |
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| 109 | c all the NAERKIND kind of aerosols in each IR band |
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| 110 | |
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| 111 | tautotal(:,:,:)=0 |
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| 112 | omegtotal(:,:,:)=0 |
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| 113 | gtotal(:,:,:)=0 |
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| 114 | |
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| 115 | do n=1,naerkind |
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| 116 | do ja=1,nir |
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| 117 | do jk=1,nlaylte |
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| 118 | do jl = 1,kdlon |
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| 119 | tautotal(jl,jk,ja)=tautotal(jl,jk,ja) + |
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| 120 | & QIRsQREF3d(jl,jk,ja,n)*aerosol(jl,jk,n) |
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| 121 | omegtotal(jl,jk,ja) = omegtotal(jl,jk,ja) + |
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| 122 | & QIRsQREF3d(jl,jk,ja,n)*aerosol(jl,jk,n)* |
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| 123 | & omegaIR3d(jl,jk,ja,n) |
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| 124 | gtotal(jl,jk,ja) = gtotal(jl,jk,ja) + |
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| 125 | & QIRsQREF3d(jl,jk,ja,n)*aerosol(jl,jk,n)* |
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| 126 | & omegaIR3d(jl,jk,ja,n)*gIR3d(jl,jk,ja,n) |
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| 127 | enddo |
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| 128 | enddo |
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| 129 | enddo |
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| 130 | enddo |
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| 131 | do ja=1,nir |
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| 132 | do jk=1,nlaylte |
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| 133 | do jl = 1,kdlon |
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| 134 | gtotal(jl,jk,ja)=gtotal(jl,jk,ja)/omegtotal(jl,jk,ja) |
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| 135 | omegtotal(jl,jk,ja)=omegtotal(jl,jk,ja)/tautotal(jl,jk,ja) |
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| 136 | enddo |
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| 137 | enddo |
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| 138 | enddo |
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| 139 | |
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| 140 | c---------------------------------------------------------------------- |
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| 141 | c 1.0 cumulative (aerosol) amounts (for every band) |
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| 142 | c ---------------------------- |
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| 143 | |
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| 144 | jk=nlaylte+1 |
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| 145 | do ja=1,nir |
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| 146 | do jl = 1 , kdlon |
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| 147 | aer_a(jl,ja,jk)=0. |
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| 148 | enddo |
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| 149 | enddo |
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| 150 | |
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| 151 | do jk=1,nlaylte |
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| 152 | jkl=nlaylte+1-jk |
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| 153 | do ja=1,nir |
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| 154 | do jl=1,kdlon |
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| 155 | aer_a(jl,ja,jkl)=aer_a(jl,ja,jkl+1)+ |
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| 156 | & tautotal(jl,jkl,ja)*(1.-omegtotal(jl,jkl,ja)) |
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| 157 | enddo |
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| 158 | enddo |
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| 159 | enddo |
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| 160 | |
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| 161 | c---------------------------------------------------------------------- |
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| 162 | c 1.0 bands 1 and 2 of co2 |
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| 163 | c -------------------- |
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| 164 | |
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| 165 | jk=nlaylte+1 |
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| 166 | do ja=1,nuco2 |
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| 167 | do jl = 1 , kdlon |
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| 168 | co2_u(jl,ja,jk)=0. |
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| 169 | co2_up(jl,ja,jk)=0. |
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| 170 | aer_t(jl,ja,jk)=1. |
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| 171 | enddo |
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| 172 | enddo |
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| 173 | |
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| 174 | do jk=1,nlaylte |
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| 175 | jkl=nlaylte+1-jk |
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| 176 | do ja=1,nuco2 |
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| 177 | do jl=1,kdlon |
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| 178 | |
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| 179 | c introduces temperature effects on absorber(co2) amounts |
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| 180 | c ------------------------------------------------------- |
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| 181 | tx = sign(min(abs(tlay(jl,jkl)-tref),70.) |
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| 182 | . ,tlay(jl,jkl)-tref) |
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| 183 | tx2=tx*tx |
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| 184 | phi(jl,ja)=at(1,ja)*tx+bt(1,ja)*tx2 |
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| 185 | psi(jl,ja)=at(2,ja)*tx+bt(2,ja)*tx2 |
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| 186 | phi(jl,ja)=exp(phi(jl,ja)/cst_voigt(2,ja)) |
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| 187 | psi(jl,ja)=exp(2.*psi(jl,ja)) |
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| 188 | |
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| 189 | c cumulative absorber(co2) amounts |
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| 190 | c -------------------------------- |
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| 191 | co2_u(jl,ja,jkl)=co2_u(jl,ja,jkl+1) |
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| 192 | . + pview/(10*g)*phi(jl,ja)*dp(jl,jkl)*co2c |
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| 193 | |
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| 194 | co2_up(jl,ja,jkl)=co2_up(jl,ja,jkl+1) |
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| 195 | . + pview/(10*g*2*pref)*psi(jl,ja) |
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| 196 | . * (plev2(jl,jkl)-plev2(jl,jkl+1))*co2c |
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| 197 | |
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| 198 | |
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| 199 | c (aerosol) transmission |
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| 200 | c ---------------------- |
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| 201 | c on calcule directement les transmissions pour les aerosols. |
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| 202 | c on multiplie le Qext par 1-omega dans la bande du CO2. |
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| 203 | c et pourquoi pas d'abord? hourdin@lmd.ens.fr |
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| 204 | |
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| 205 | c TN 04/12 : if very big water ice clouds, aer_t is strictly rounded |
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| 206 | c to zero in lower levels, which is a source of NaN |
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| 207 | !aer_t(jl,ja,jkl)=exp(-pview*aer_a(jl,ja,jkl)) |
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| 208 | aer_t(jl,ja,jkl)=max(exp(-pview*aer_a(jl,ja,jkl)),1e-30) |
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| 209 | |
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| 210 | |
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| 211 | enddo |
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| 212 | enddo |
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| 213 | enddo |
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| 214 | |
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| 215 | c---------------------------------------------------------------------- |
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| 216 | end subroutine lwu |
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| 217 | |
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| 218 | end module lwu_mod |
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