| [135] | 1 | SUBROUTINE OPTCV(DTAUV,TAUV,TAUCUMV,PLEV, |
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| 2 | & QXVAER,QSVAER,GVAER,WBARV,COSBV, |
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| 3 | & TAURAY,TAUAERO,TMID,PMID,TAUGSURF,QVAR) |
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| 4 | |
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| 5 | use radinc_h |
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| 6 | use radcommon_h, only: gasv, tlimit, wrefVAR, Cmk, tgasref, |
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| 7 | & pfgasref |
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| 8 | |
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| 9 | implicit none |
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| 10 | |
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| 11 | !================================================================== |
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| 12 | ! |
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| 13 | ! Purpose |
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| 14 | ! ------- |
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| 15 | ! Calculates shortwave optical constants at each level. |
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| 16 | ! |
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| 17 | ! Authors |
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| 18 | ! ------- |
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| 19 | ! Adapted from the NASA Ames code by R. Wordsworth (2009) |
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| 20 | ! |
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| 21 | !================================================================== |
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| 22 | |
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| 23 | |
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| 24 | C |
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| 25 | C THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL |
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| 26 | C IT CALCUALTES FOR EACH LAYER, FOR EACH SPECRAL INTERVAL IN THE VISUAL |
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| 27 | C LAYER: WBAR, DTAU, COSBAR |
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| 28 | C LEVEL: TAU |
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| 29 | C |
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| 30 | C TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code |
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| 31 | C layer L. NW is spectral wavelength interval, ng the Gauss point index. |
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| 32 | C |
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| 33 | C TLEV(L) - Temperature at the layer boundary |
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| 34 | C PLEV(L) - Pressure at the layer boundary (i.e. level) |
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| 35 | C GASV(NT,NPS,NW,NG) - Visual CO2 k-coefficients |
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| 36 | C |
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| 37 | C----------------------------------------------------------------------C |
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| 38 | |
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| 39 | #include "callkeys.h" |
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| 40 | #include "comcstfi.h" |
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| 41 | |
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| 42 | real*8 DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS) |
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| 43 | real*8 DTAUKV(L_LEVELS+1,L_NSPECTV,L_NGAUSS) |
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| 44 | real*8 TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS) |
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| 45 | real*8 TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS) |
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| 46 | real*8 PLEV(L_LEVELS) |
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| 47 | real*8 TMID(L_LEVELS), PMID(L_LEVELS) |
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| 48 | real*8 COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS) |
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| 49 | real*8 WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS) |
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| 50 | real*8 TAURAY(L_NSPECTV) |
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| 51 | |
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| 52 | ! For aerosols |
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| 53 | real*8 QXVAER(L_LEVELS+1,L_NSPECTV,NAERKIND) |
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| 54 | real*8 QSVAER(L_LEVELS+1,L_NSPECTV,NAERKIND) |
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| 55 | real*8 GVAER(L_LEVELS+1,L_NSPECTV,NAERKIND) |
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| 56 | real*8 TAUAERO(L_LEVELS+1,NAERKIND) |
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| 57 | real*8 TAUAEROLK(L_LEVELS+1,L_NSPECTV,NAERKIND) |
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| 58 | real*8 TAEROS(L_LEVELS,L_NSPECTV,NAERKIND) |
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| 59 | |
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| 60 | integer L, NW, NG, K, NG1(L_NSPECTV), LK, IAER |
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| 61 | integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS) |
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| 62 | real*8 ANS, TAUGAS |
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| 63 | real*8 TRAY(L_LEVELS,L_NSPECTV) |
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| 64 | real*8 DPR(L_LEVELS), U(L_LEVELS) |
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| 65 | real*8 LCOEF(4), LKCOEF(L_LEVELS,4) |
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| 66 | |
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| 67 | real*8 taugsurf(L_NSPECTV,L_NGAUSS-1), TRAYAER |
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| 68 | |
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| 69 | ! Water mixing ratio variables |
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| 70 | real*8 QVAR(L_LEVELS), WRATIO(L_LEVELS) |
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| 71 | real*8 KCOEF(4) |
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| 72 | integer NVAR(L_LEVELS) |
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| 73 | |
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| 74 | ! temporary variables for multiple aerosol calculation |
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| 75 | real*8 atemp, btemp, ctemp |
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| 76 | |
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| 77 | ! variables for k in units m^-1 |
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| 78 | real*8 rho, dz |
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| 79 | |
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| 80 | !======================================================================= |
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| 81 | ! Determine the total gas opacity throughout the column, for each |
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| 82 | ! spectral interval, NW, and each Gauss point, NG. |
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| 83 | ! Calculate the continuum opacities, i.e., those that do not depend on |
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| 84 | ! NG, the Gauss index. |
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| 85 | |
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| 86 | do K=2,L_LEVELS |
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| 87 | DPR(k) = PLEV(K)-PLEV(K-1) |
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| 88 | |
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| 89 | |
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| 90 | rho = PLEV(K)/(R*TMID(K)) |
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| 91 | dz = -DPR(k)/(g*rho) |
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| 92 | !print*,'rho=',rho |
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| 93 | !print*,'dz=',dz |
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| 94 | |
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| 95 | U(k) = Cmk*DPR(k) |
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| 96 | |
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| 97 | call tpindex(PMID(K),TMID(K),QVAR(K),pfgasref,tgasref,WREFVAR, |
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| 98 | * LCOEF,MT(K),MP(K),NVAR(K),WRATIO(K)) |
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| 99 | |
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| 100 | do LK=1,4 |
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| 101 | LKCOEF(K,LK) = LCOEF(LK) |
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| 102 | end do |
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| 103 | |
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| 104 | DO NW=1,L_NSPECTV |
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| 105 | TRAY(K,NW) = TAURAY(NW) * DPR(K) |
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| 106 | |
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| 107 | do iaer=1,naerkind |
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| 108 | TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXVAER(K,NW,IAER) |
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| 109 | end do |
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| 110 | ! |
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| 111 | |
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| 112 | END DO |
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| 113 | end do |
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| 114 | |
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| 115 | ! TRAYAER is Tau RAYleigh scattering, plus AERosol opacity |
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| 116 | |
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| 117 | |
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| 118 | ! we ignore K=1... hope this is ok... |
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| 119 | do K=2,L_LEVELS |
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| 120 | do NW=1,L_NSPECTV |
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| 121 | |
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| 122 | TRAYAER = TRAY(K,NW) |
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| 123 | do iaer=1,naerkind |
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| 124 | TRAYAER = TRAYAER + TAEROS(K,NW,IAER) |
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| 125 | end do |
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| 126 | |
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| 127 | do NG=1,L_NGAUSS-1 |
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| 128 | |
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| 129 | !======================================================================= |
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| 130 | ! Now compute TAUGAS |
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| 131 | ! Interpolate between water mixing ratios |
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| 132 | ! WRATIO = 0.0 if the requested water amount is equal to, or outside the |
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| 133 | ! the water data range |
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| 134 | |
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| 135 | if (L_REFVAR.eq.1)then ! added by RW for special no variable case |
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| 136 | KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG) |
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| 137 | KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG) |
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| 138 | KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG) |
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| 139 | KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG) |
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| 140 | else |
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| 141 | KCOEF(1) = GASV(MT(K),MP(K),NVAR(K),NW,NG) + WRATIO(K)* |
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| 142 | * (GASV(MT(K),MP(K),NVAR(K)+1,NW,NG) - |
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| 143 | * GASV(MT(K),MP(K),NVAR(K),NW,NG)) |
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| 144 | |
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| 145 | KCOEF(2) = GASV(MT(K),MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* |
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| 146 | * (GASV(MT(K),MP(K)+1,NVAR(K)+1,NW,NG) - |
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| 147 | * GASV(MT(K),MP(K)+1,NVAR(K),NW,NG)) |
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| 148 | |
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| 149 | KCOEF(3) = GASV(MT(K)+1,MP(K)+1,NVAR(K),NW,NG) + WRATIO(K)* |
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| 150 | * (GASV(MT(K)+1,MP(K)+1,NVAR(K)+1,NW,NG) - |
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| 151 | * GASV(MT(K)+1,MP(K)+1,NVAR(K),NW,NG)) |
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| 152 | |
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| 153 | KCOEF(4) = GASV(MT(K)+1,MP(K),NVAR(K),NW,NG) + WRATIO(K)* |
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| 154 | * (GASV(MT(K)+1,MP(K),NVAR(K)+1,NW,NG) - |
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| 155 | * GASV(MT(K)+1,MP(K),NVAR(K),NW,NG)) |
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| 156 | endif |
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| 157 | |
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| 158 | ! Interpolate the gaseous k-coefficients to the requested T,P values |
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| 159 | |
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| 160 | ANS = LKCOEF(K,1)*KCOEF(1) + LKCOEF(K,2)*KCOEF(2) + |
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| 161 | * LKCOEF(K,3)*KCOEF(3) + LKCOEF(K,4)*KCOEF(4) |
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| 162 | |
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| 163 | TAUGAS = U(k)*ANS |
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| 164 | TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS |
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| 165 | DTAUKV(K,nw,ng) = TAUGAS + TRAYAER |
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| 166 | end do |
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| 167 | |
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| 168 | |
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| 169 | ! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS), |
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| 170 | ! which holds continuum opacity only |
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| 171 | |
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| 172 | NG = L_NGAUSS |
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| 173 | DTAUKV(K,nw,ng) = TRAY(K,NW) |
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| 174 | do iaer=1,naerkind |
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| 175 | DTAUKV(K,nw,ng) = DTAUKV(K,nw,ng) + TAEROS(K,NW,IAER) |
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| 176 | end do |
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| 177 | |
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| 178 | end do |
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| 179 | end do |
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| 180 | |
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| 181 | |
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| 182 | !======================================================================= |
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| 183 | ! Now the full treatment for the layers, where besides the opacity |
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| 184 | ! we need to calculate the scattering albedo and asymmetry factors |
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| 185 | |
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| 186 | DO NW=1,L_NSPECTV |
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| 187 | DO K=2,L_LEVELS |
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| 188 | do iaer=1,naerkind |
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| 189 | TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER) * QSVAER(K,NW,IAER) |
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| 190 | end do |
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| 191 | ENDDO |
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| 192 | ENDDO |
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| 193 | |
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| 194 | |
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| 195 | DO NW=1,L_NSPECTV |
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| 196 | DO NG=1,L_NGAUSS |
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| 197 | DO L=1,L_NLAYRAD-1 |
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| 198 | K = 2*L+1 |
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| 199 | |
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| 200 | DTAUV(L,nw,ng) = DTAUKV(K,NW,NG)+DTAUKV(K+1,NW,NG) |
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| 201 | |
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| 202 | atemp=0. |
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| 203 | btemp=TRAY(K,NW) + TRAY(K+1,NW) |
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| 204 | ctemp=0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) |
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| 205 | do iaer=1,naerkind |
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| 206 | atemp = atemp + |
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| 207 | * GVAER(K,NW,IAER) * TAUAEROLK(K,NW,IAER) + |
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| 208 | * GVAER(K+1,NW,IAER) * TAUAEROLK(K+1,NW,IAER) |
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| 209 | btemp = btemp + |
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| 210 | * TAUAEROLK(K,NW,IAER) + TAUAEROLK(K+1,NW,IAER) |
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| 211 | ctemp = ctemp + |
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| 212 | * TAUAEROLK(K,NW,IAER) + TAUAEROLK(K+1,NW,IAER) |
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| 213 | end do |
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| 214 | |
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| 215 | COSBV(L,NW,NG) = atemp/btemp |
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| 216 | WBARV(L,nw,ng) = ctemp/DTAUV(L,nw,ng) |
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| 217 | |
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| 218 | END DO |
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| 219 | |
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| 220 | ! No vertical averaging on bottom layer |
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| 221 | |
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| 222 | L = L_NLAYRAD |
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| 223 | K = 2*L+1 |
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| 224 | DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) |
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| 225 | |
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| 226 | atemp=0. |
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| 227 | btemp=TRAY(K,NW) |
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| 228 | ctemp=0.9999*TRAY(K,NW) |
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| 229 | do iaer=1,naerkind |
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| 230 | atemp = atemp + GVAER(K,NW,IAER) * TAUAEROLK(K,NW,IAER) |
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| 231 | btemp = btemp + TAUAEROLK(K,NW,IAER) |
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| 232 | ctemp = ctemp + TAUAEROLK(K,NW,IAER) |
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| 233 | end do |
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| 234 | COSBV(L,NW,NG) = atemp/btemp |
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| 235 | WBARV(L,nw,ng) = ctemp/DTAUV(L,nw,ng) |
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| 236 | |
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| 237 | END DO ! NG gauss point loop |
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| 238 | END DO ! NW spectral loop |
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| 239 | |
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| 240 | |
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| 241 | |
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| 242 | ! Total extinction optical depths |
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| 243 | |
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| 244 | DO NW=1,L_NSPECTV |
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| 245 | DO NG=1,L_NGAUSS ! full gauss loop |
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| 246 | TAUV(1,NW,NG)=0.0D0 |
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| 247 | DO L=1,L_NLAYRAD |
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| 248 | TAUV(L+1,NW,NG)=TAUV(L,NW,NG)+DTAUV(L,NW,NG) |
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| 249 | END DO |
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| 250 | |
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| 251 | TAUCUMV(1,NW,NG)=0.0D0 |
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| 252 | DO K=2,L_LEVELS |
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| 253 | TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG) |
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| 254 | END DO |
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| 255 | END DO ! end full gauss loop |
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| 256 | END DO |
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| 257 | |
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| 258 | |
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| 259 | RETURN |
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| 260 | END |
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