| 1 | subroutine optci(PLEV,TLEV,DTAUI,TAUCUMI, & |
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| 2 | QXIAER,QSIAER,GIAER,COSBI,WBARI,TAUAERO, & |
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| 3 | TMID,PMID,TAUGSURF,QVAR,MUVAR) |
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| 4 | |
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| 5 | use radinc_h |
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| 6 | use radcommon_h, only: gasi,tlimit,wrefVAR,Cmk,tgasref,pfgasref,wnoi,scalep,indi |
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| 7 | use gases_h |
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| 8 | implicit none |
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| 9 | |
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| 10 | !================================================================== |
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| 11 | ! |
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| 12 | ! Purpose |
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| 13 | ! ------- |
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| 14 | ! Calculates longwave optical constants at each level. For each |
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| 15 | ! layer and spectral interval in the IR it calculates WBAR, DTAU |
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| 16 | ! and COSBAR. For each level it calculates TAU. |
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| 17 | ! |
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| 18 | ! TAUI(L,LW) is the cumulative optical depth at level L (or alternatively |
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| 19 | ! at the *bottom* of layer L), LW is the spectral wavelength interval. |
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| 20 | ! |
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| 21 | ! TLEV(L) - Temperature at the layer boundary (i.e., level) |
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| 22 | ! PLEV(L) - Pressure at the layer boundary (i.e., level) |
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| 23 | ! |
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| 24 | ! Authors |
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| 25 | ! ------- |
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| 26 | ! Adapted from the NASA Ames code by R. Wordsworth (2009) |
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| 27 | ! |
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| 28 | !================================================================== |
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| 29 | |
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| 30 | #include "comcstfi.h" |
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| 31 | #include "callkeys.h" |
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| 32 | |
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| 33 | |
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| 34 | real*8 DTAUI(L_NLAYRAD,L_NSPECTI,L_NGAUSS) |
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| 35 | real*8 DTAUKI(L_LEVELS+1,L_NSPECTI,L_NGAUSS) |
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| 36 | real*8 TAUI(L_NLEVRAD,L_NSPECTI,L_NGAUSS) |
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| 37 | real*8 TAUCUMI(L_LEVELS,L_NSPECTI,L_NGAUSS) |
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| 38 | real*8 PLEV(L_LEVELS) |
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| 39 | real*8 TLEV(L_LEVELS) |
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| 40 | real*8 TMID(L_LEVELS), PMID(L_LEVELS) |
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| 41 | real*8 COSBI(L_NLAYRAD,L_NSPECTI,L_NGAUSS) |
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| 42 | real*8 WBARI(L_NLAYRAD,L_NSPECTI,L_NGAUSS) |
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| 43 | |
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| 44 | ! for aerosols |
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| 45 | real*8 QXIAER(L_LEVELS+1,L_NSPECTI,NAERKIND) |
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| 46 | real*8 QSIAER(L_LEVELS+1,L_NSPECTI,NAERKIND) |
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| 47 | real*8 GIAER(L_LEVELS+1,L_NSPECTI,NAERKIND) |
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| 48 | real*8 TAUAERO(L_LEVELS+1,NAERKIND) |
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| 49 | real*8 TAUAEROLK(L_LEVELS+1,L_NSPECTI,NAERKIND) |
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| 50 | real*8 TAEROS(L_LEVELS,L_NSPECTI,NAERKIND) |
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| 51 | |
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| 52 | integer L, NW, NG, K, LK, IAER |
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| 53 | integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS) |
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| 54 | real*8 ANS, TAUGAS |
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| 55 | real*8 DPR(L_LEVELS), U(L_LEVELS) |
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| 56 | real*8 LCOEF(4), LKCOEF(L_LEVELS,4) |
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| 57 | |
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| 58 | real*8 taugsurf(L_NSPECTI,L_NGAUSS-1) |
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| 59 | real*8 DCONT,DAERO |
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| 60 | double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc |
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| 61 | double precision p_cross |
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| 62 | |
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| 63 | ! variable species mixing ratio variables |
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| 64 | real*8 QVAR(L_LEVELS), WRATIO(L_LEVELS), MUVAR(L_LEVELS) |
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| 65 | real*8 KCOEF(4) |
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| 66 | integer NVAR(L_LEVELS) |
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| 67 | |
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| 68 | ! temporary variables for multiple aerosol calculation |
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| 69 | real*8 atemp |
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| 70 | real*8 btemp(L_NLAYRAD,L_NSPECTI) |
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| 71 | |
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| 72 | ! variables for k in units m^-1 |
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| 73 | real*8 dz(L_LEVELS) |
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| 74 | !real*8 rho !! see test below |
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| 75 | |
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| 76 | integer igas, jgas |
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| 77 | |
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| 78 | integer interm |
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| 79 | |
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| 80 | !--- Kasting's CIA ---------------------------------------- |
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| 81 | !real*8, parameter :: Ci(L_NSPECTI)=[ & |
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| 82 | ! 3.8E-5, 1.2E-5, 2.8E-6, 7.6E-7, 4.5E-7, 2.3E-7, & |
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| 83 | ! 5.4E-7, 1.6E-6, 0.0, & |
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| 84 | ! 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
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| 85 | ! 0.0, 4.0E-7, 4.0E-6, 1.4E-5, & |
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| 86 | ! 1.0E-5, 1.2E-6, 2.0E-7, 5.0E-8, 3.0E-8, 0.0 ] |
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| 87 | !real*8, parameter :: Ti(L_NSPECTI)=[ -2.2, -1.9, & |
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| 88 | ! -1.7, -1.7, -1.7, -1.7, -1.7, -1.7, & |
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| 89 | ! 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, & |
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| 90 | ! -1.7,-1.7,-1.7,-1.7,-1.7,-1.7,-1.7, -1.7,0.0 ] |
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| 91 | !---------------------------------------------------------- |
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| 92 | |
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| 93 | !! AS: to save time in computing continuum (see bilinearbig) |
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| 94 | IF (.not.ALLOCATED(indi)) THEN |
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| 95 | ALLOCATE(indi(L_NSPECTI,ngasmx,ngasmx)) |
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| 96 | indi = -9999 ! this initial value means "to be calculated" |
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| 97 | ENDIF |
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| 98 | |
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| 99 | !======================================================================= |
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| 100 | ! Determine the total gas opacity throughout the column, for each |
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| 101 | ! spectral interval, NW, and each Gauss point, NG. |
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| 102 | |
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| 103 | taugsurf(:,:) = 0.0 |
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| 104 | dpr(:) = 0.0 |
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| 105 | lkcoef(:,:) = 0.0 |
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| 106 | |
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| 107 | do K=2,L_LEVELS |
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| 108 | DPR(k) = PLEV(K)-PLEV(K-1) |
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| 109 | |
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| 110 | !--- Kasting's CIA ---------------------------------------- |
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| 111 | !dz(k)=dpr(k)*189.02*TMID(K)/(0.03720*PMID(K)) |
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| 112 | ! this is CO2 path length (in cm) as written by Francois |
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| 113 | ! delta_z = delta_p * R_specific * T / (g * P) |
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| 114 | ! But Kasting states that W is in units of _atmosphere_ cm |
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| 115 | ! So we do |
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| 116 | !dz(k)=dz(k)*(PMID(K)/1013.25) |
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| 117 | !dz(k)=dz(k)/100.0 ! in m for SI calc |
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| 118 | !---------------------------------------------------------- |
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| 119 | |
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| 120 | ! if we have continuum opacities, we need dz |
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| 121 | if(kastprof)then |
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| 122 | dz(k) = dpr(k)*(1000.0d0*8.3145d0/muvar(k))*TMID(K)/(g*PMID(K)) |
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| 123 | U(k) = (Cmk*mugaz/(muvar(k)))*DPR(k) |
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| 124 | else |
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| 125 | dz(k) = dpr(k)*R*TMID(K)/(g*PMID(K)) |
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| 126 | U(k) = Cmk*DPR(k) ! only Cmk line in optci.F |
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| 127 | endif |
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| 128 | |
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| 129 | call tpindex(PMID(K),TMID(K),QVAR(K),pfgasref,tgasref,WREFVAR, & |
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| 130 | LCOEF,MT(K),MP(K),NVAR(K),WRATIO(K)) |
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| 131 | |
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| 132 | do LK=1,4 |
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| 133 | LKCOEF(K,LK) = LCOEF(LK) |
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| 134 | end do |
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| 135 | end do ! levels |
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| 136 | |
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| 137 | |
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| 138 | do iaer=1,naerkind |
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| 139 | DO NW=1,L_NSPECTI |
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| 140 | do K=2,L_LEVELS |
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| 141 | TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXIAER(K,NW,IAER) |
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| 142 | end do ! levels |
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| 143 | END DO |
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| 144 | end do |
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| 145 | |
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| 146 | do NW=1,L_NSPECTI |
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| 147 | |
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| 148 | do K=2,L_LEVELS |
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| 149 | |
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| 150 | ! continuum absorption |
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| 151 | DCONT = 0.0d0 |
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| 152 | |
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| 153 | if(continuum.and.(.not.graybody))then |
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| 154 | ! include continua if necessary |
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| 155 | wn_cont = dble(wnoi(nw)) |
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| 156 | T_cont = dble(TMID(k)) |
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| 157 | do igas=1,ngasmx |
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| 158 | |
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| 159 | if(gfrac(igas).eq.-1)then ! variable |
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| 160 | p_cont = dble(PMID(k)*scalep*QVAR(k)) ! qvar = mol/mol |
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| 161 | else |
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| 162 | p_cont = dble(PMID(k)*scalep*gfrac(igas)*(1.-QVAR(k))) |
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| 163 | endif |
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| 164 | |
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| 165 | dtemp=0.0d0 |
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| 166 | if(igas.eq.igas_N2)then |
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| 167 | |
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| 168 | interm = indi(nw,igas,igas) |
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| 169 | call interpolateN2N2(wn_cont,T_cont,p_cont,dtemp,.false.,interm) |
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| 170 | indi(nw,igas,igas) = interm |
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| 171 | |
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| 172 | elseif(igas.eq.igas_H2)then |
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| 173 | |
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| 174 | ! first do self-induced absorption |
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| 175 | interm = indi(nw,igas,igas) |
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| 176 | call interpolateH2H2(wn_cont,T_cont,p_cont,dtemp,.false.,interm) |
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| 177 | indi(nw,igas,igas) = interm |
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| 178 | |
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| 179 | ! then cross-interactions with other gases |
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| 180 | do jgas=1,ngasmx |
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| 181 | p_cross = dble(PMID(k)*scalep*gfrac(jgas)*(1.-QVAR(k))) |
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| 182 | dtempc = 0.0d0 |
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| 183 | if(jgas.eq.igas_N2)then |
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| 184 | interm = indi(nw,igas,jgas) |
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| 185 | call interpolateN2H2(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm) |
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| 186 | indi(nw,igas,jgas) = interm |
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| 187 | elseif(jgas.eq.igas_He)then |
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| 188 | interm = indi(nw,igas,jgas) |
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| 189 | call interpolateH2He(wn_cont,T_cont,p_cross,p_cont,dtempc,.false.,interm) |
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| 190 | indi(nw,igas,jgas) = interm |
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| 191 | endif |
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| 192 | dtemp = dtemp + dtempc |
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| 193 | enddo |
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| 194 | |
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| 195 | elseif(igas.eq.igas_H2O.and.T_cont.gt.200.0)then |
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| 196 | |
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| 197 | p_air = dble(PMID(k)*scalep) - p_cont ! note assumes background is air! |
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| 198 | if(H2Ocont_simple)then |
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| 199 | call interpolateH2Ocont_PPC(wn_cont,T_cont,p_cont,p_air,dtemp,.false.) |
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| 200 | else |
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| 201 | interm = indi(nw,igas,igas) |
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| 202 | call interpolateH2Ocont_CKD(wn_cont,T_cont,p_cont,p_air,dtemp,.false.,interm) |
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| 203 | indi(nw,igas,igas) = interm |
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| 204 | endif |
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| 205 | |
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| 206 | endif |
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| 207 | |
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| 208 | DCONT = DCONT + dtemp |
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| 209 | |
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| 210 | enddo |
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| 211 | |
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| 212 | ! Oobleck test |
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| 213 | !rho = PMID(k)*scalep / (TMID(k)*286.99) |
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| 214 | !if(WNOI(nw).gt.300.0 .and. WNOI(nw).lt.500.0)then |
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| 215 | ! DCONT = rho * 0.125 * 4.6e-4 |
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| 216 | !elseif(WNOI(nw).gt.500.0 .and. WNOI(nw).lt.700.0)then |
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| 217 | ! DCONT = 1000*dpr(k) * 1.0 * 4.6e-4 / g |
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| 218 | ! DCONT = rho * 1.0 * 4.6e-4 |
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| 219 | !elseif(WNOI(nw).gt.700.0 .and. WNOI(nw).lt.900.0)then |
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| 220 | ! DCONT = rho * 0.125 * 4.6e-4 |
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| 221 | !endif |
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| 222 | |
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| 223 | DCONT = DCONT*dz(k) |
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| 224 | |
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| 225 | endif |
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| 226 | |
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| 227 | ! aerosol absorption |
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| 228 | DAERO=SUM(TAEROS(K,NW,1:naerkind)) |
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| 229 | |
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| 230 | do ng=1,L_NGAUSS-1 |
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| 231 | |
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| 232 | ! Now compute TAUGAS |
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| 233 | |
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| 234 | ! Interpolate between water mixing ratios |
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| 235 | ! WRATIO = 0.0 if the requested water amount is equal to, or outside the |
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| 236 | ! the water data range |
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| 237 | |
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| 238 | if(L_REFVAR.eq.1)then ! added by RW for special no variable case |
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| 239 | KCOEF(1) = GASI(MT(K),MP(K),1,NW,NG) |
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| 240 | KCOEF(2) = GASI(MT(K),MP(K)+1,1,NW,NG) |
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| 241 | KCOEF(3) = GASI(MT(K)+1,MP(K)+1,1,NW,NG) |
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| 242 | KCOEF(4) = GASI(MT(K)+1,MP(K),1,NW,NG) |
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| 243 | else |
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| 244 | |
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| 245 | KCOEF(1) = GASI(MT(K),MP(K),NVAR(K),NW,NG) + WRATIO(K)* & |
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| 246 | (GASI(MT(K),MP(K),NVAR(K)+1,NW,NG) - & |
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| 247 | GASI(MT(K),MP(K),NVAR(K),NW,NG)) |
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| 248 | |
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| 249 | KCOEF(2) = GASI(MT(K),MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* & |
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| 250 | (GASI(MT(K),MP(K)+1,NVAR(K)+1,NW,NG) - & |
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| 251 | GASI(MT(K),MP(K)+1,NVAR(K),NW,NG)) |
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| 252 | |
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| 253 | KCOEF(3) = GASI(MT(K)+1,MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* & |
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| 254 | (GASI(MT(K)+1,MP(K)+1,NVAR(K)+1,NW,NG) - & |
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| 255 | GASI(MT(K)+1,MP(K)+1,NVAR(K),NW,NG)) |
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| 256 | |
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| 257 | KCOEF(4) = GASI(MT(K)+1,MP(K),NVAR(K),NW,NG) + WRATIO(K)* & |
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| 258 | (GASI(MT(K)+1,MP(K),NVAR(K)+1,NW,NG) - & |
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| 259 | GASI(MT(K)+1,MP(K),NVAR(K),NW,NG)) |
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| 260 | |
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| 261 | endif |
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| 262 | |
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| 263 | ! Interpolate the gaseous k-coefficients to the requested T,P values |
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| 264 | |
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| 265 | ANS = LKCOEF(K,1)*KCOEF(1) + LKCOEF(K,2)*KCOEF(2) + & |
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| 266 | LKCOEF(K,3)*KCOEF(3) + LKCOEF(K,4)*KCOEF(4) |
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| 267 | |
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| 268 | TAUGAS = U(k)*ANS |
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| 269 | |
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| 270 | TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT |
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| 271 | DTAUKI(K,nw,ng) = TAUGAS & |
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| 272 | + DCONT & ! For parameterized continuum absorption |
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| 273 | + DAERO ! For aerosol absorption |
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| 274 | |
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| 275 | end do |
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| 276 | |
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| 277 | ! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS), |
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| 278 | ! which holds continuum opacity only |
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| 279 | |
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| 280 | NG = L_NGAUSS |
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| 281 | DTAUKI(K,nw,ng) = 0.d0 & |
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| 282 | + DCONT & ! For parameterized continuum absorption |
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| 283 | + DAERO ! For aerosol absorption |
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| 284 | |
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| 285 | end do |
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| 286 | end do |
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| 287 | |
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| 288 | DTAUKI(L_LEVELS+1,1:L_NSPECTI,1:L_NGAUSS)=0.d0 |
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| 289 | !======================================================================= |
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| 290 | ! Now the full treatment for the layers, where besides the opacity |
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| 291 | ! we need to calculate the scattering albedo and asymmetry factors |
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| 292 | |
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| 293 | do iaer=1,naerkind |
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| 294 | DO NW=1,L_NSPECTI |
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| 295 | DO K=2,L_LEVELS+1 |
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| 296 | TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER)*QSIAER(K,NW,IAER) |
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| 297 | ENDDO |
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| 298 | ENDDO |
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| 299 | end do |
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| 300 | |
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| 301 | DO NW=1,L_NSPECTI |
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| 302 | DO L=1,L_NLAYRAD |
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| 303 | K = 2*L+1 |
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| 304 | btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) + SUM(TAUAEROLK(K+1,NW,1:naerkind)) |
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| 305 | END DO ! L vertical loop |
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| 306 | END DO ! NW spectral loop |
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| 307 | |
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| 308 | |
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| 309 | DO NW=1,L_NSPECTI |
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| 310 | NG = L_NGAUSS |
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| 311 | DO L=1,L_NLAYRAD |
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| 312 | |
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| 313 | K = 2*L+1 |
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| 314 | DTAUI(L,nw,ng) = DTAUKI(K,NW,NG) + DTAUKI(K+1,NW,NG)! + 1.e-50 |
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| 315 | |
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| 316 | atemp = 0. |
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| 317 | if(DTAUI(L,NW,NG) .GT. 1.0D-9) then |
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| 318 | do iaer=1,naerkind |
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| 319 | atemp = atemp + & |
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| 320 | GIAER(K,NW,IAER) * TAUAEROLK(K,NW,IAER) + & |
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| 321 | GIAER(K+1,NW,IAER) * TAUAEROLK(K+1,NW,IAER) |
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| 322 | end do |
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| 323 | WBARI(L,nw,ng) = btemp(L,nw) / DTAUI(L,NW,NG) |
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| 324 | else |
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| 325 | WBARI(L,nw,ng) = 0.0D0 |
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| 326 | DTAUI(L,NW,NG) = 1.0D-9 |
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| 327 | endif |
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| 328 | |
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| 329 | if(btemp(L,nw) .GT. 0.0d0) then |
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| 330 | cosbi(L,NW,NG) = atemp/btemp(L,nw) |
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| 331 | else |
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| 332 | cosbi(L,NW,NG) = 0.0D0 |
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| 333 | end if |
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| 334 | |
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| 335 | END DO ! L vertical loop |
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| 336 | |
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| 337 | ! Now the other Gauss points, if needed. |
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| 338 | |
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| 339 | DO NG=1,L_NGAUSS-1 |
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| 340 | IF(TAUGSURF(NW,NG) .gt. TLIMIT) THEN |
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| 341 | |
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| 342 | DO L=1,L_NLAYRAD |
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| 343 | K = 2*L+1 |
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| 344 | DTAUI(L,nw,ng) = DTAUKI(K,NW,NG)+DTAUKI(K+1,NW,NG)! + 1.e-50 |
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| 345 | |
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| 346 | if(DTAUI(L,NW,NG) .GT. 1.0D-9) then |
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| 347 | |
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| 348 | WBARI(L,nw,ng) = btemp(L,nw) / DTAUI(L,NW,NG) |
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| 349 | |
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| 350 | else |
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| 351 | WBARI(L,nw,ng) = 0.0D0 |
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| 352 | DTAUI(L,NW,NG) = 1.0D-9 |
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| 353 | endif |
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| 354 | |
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| 355 | cosbi(L,NW,NG) = cosbi(L,NW,L_NGAUSS) |
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| 356 | END DO ! L vertical loop |
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| 357 | END IF |
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| 358 | |
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| 359 | END DO ! NG Gauss loop |
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| 360 | END DO ! NW spectral loop |
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| 361 | |
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| 362 | ! Total extinction optical depths |
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| 363 | |
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| 364 | DO NG=1,L_NGAUSS ! full gauss loop |
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| 365 | DO NW=1,L_NSPECTI |
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| 366 | TAUCUMI(1,NW,NG)=0.0D0 |
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| 367 | DO K=2,L_LEVELS |
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| 368 | TAUCUMI(K,NW,NG)=TAUCUMI(K-1,NW,NG)+DTAUKI(K,NW,NG) |
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| 369 | END DO |
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| 370 | END DO ! end full gauss loop |
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| 371 | END DO |
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| 372 | |
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| 373 | ! be aware when comparing with textbook results |
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| 374 | ! (e.g. Pierrehumbert p. 218) that |
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| 375 | ! taucumi does not take the <cos theta>=0.5 factor into |
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| 376 | ! account. It is the optical depth for a vertically |
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| 377 | ! ascending ray with angle theta = 0. |
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| 378 | |
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| 379 | !open(127,file='taucum.out') |
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| 380 | !do nw=1,L_NSPECTI |
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| 381 | ! write(127,*) taucumi(L_LEVELS,nw,L_NGAUSS) |
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| 382 | !enddo |
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| 383 | !close(127) |
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| 384 | |
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| 385 | ! print*,'WBARI' |
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| 386 | ! print*,WBARI |
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| 387 | ! print*,'DTAUI' |
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| 388 | ! print*,DTAUI |
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| 389 | ! call abort |
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| 390 | |
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| 391 | |
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| 392 | return |
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| 393 | |
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| 394 | |
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| 395 | end subroutine optci |
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| 396 | |
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| 397 | |
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| 398 | |
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