| 1 | MODULE optcv_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 OPTCV(DTAUV,TAUV,TAUCUMV,PLEV, & |
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| 8 | QXVAER,QSVAER,GVAER,WBARV,COSBV, & |
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| 9 | TAURAY,TAUAERO,TMID,PMID,TAUGSURF,QVAR,MUVAR) |
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| 10 | |
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| 11 | use radinc_h, only: L_NLAYRAD, L_NLEVRAD, L_LEVELS, L_NSPECTV, L_NGAUSS, L_REFVAR, NAERKIND |
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| 12 | use radcommon_h, only: gasv, tlimit, tgasref, pfgasref,wnov,scalep,indv |
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| 13 | use gases_h, only: gfrac, ngasmx, igas_H2O, igas_CO2 |
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| 14 | use interpolate_continuum_mod, only: interpolate_continuum |
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| 15 | use YOMCST_mod |
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| 16 | |
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| 17 | implicit none |
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| 18 | !#include "YOMCST.h" |
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| 19 | |
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| 20 | !================================================================== |
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| 21 | ! |
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| 22 | ! Purpose |
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| 23 | ! ------- |
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| 24 | ! Calculates shortwave optical constants at each level. |
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| 25 | ! |
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| 26 | ! Authors |
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| 27 | ! ------- |
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| 28 | ! Adapted from the NASA Ames code by R. Wordsworth (2009) |
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| 29 | ! |
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| 30 | !================================================================== |
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| 31 | ! |
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| 32 | ! THIS SUBROUTINE SETS THE OPTICAL CONSTANTS IN THE VISUAL |
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| 33 | ! IT CALCULATES FOR EACH LAYER, FOR EACH SPECTRAL INTERVAL IN THE VISUAL |
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| 34 | ! LAYER: WBAR, DTAU, COSBAR |
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| 35 | ! LEVEL: TAU |
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| 36 | ! |
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| 37 | ! TAUV(L,NW,NG) is the cumulative optical depth at the top of radiation code |
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| 38 | ! layer L. NW is spectral wavelength interval, ng the Gauss point index. |
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| 39 | ! |
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| 40 | ! TLEV(L) - Temperature at the layer boundary |
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| 41 | ! PLEV(L) - Pressure at the layer boundary (i.e. level) |
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| 42 | ! GASV(NT,NPS,NW,NG) - Visible k-coefficients |
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| 43 | ! |
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| 44 | !------------------------------------------------------------------- |
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| 45 | |
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| 46 | |
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| 47 | real*8 DTAUV(L_NLAYRAD,L_NSPECTV,L_NGAUSS) |
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| 48 | real*8 DTAUKV(L_LEVELS,L_NSPECTV,L_NGAUSS) |
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| 49 | real*8 TAUV(L_NLEVRAD,L_NSPECTV,L_NGAUSS) |
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| 50 | real*8 TAUCUMV(L_LEVELS,L_NSPECTV,L_NGAUSS) |
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| 51 | real*8 PLEV(L_LEVELS) |
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| 52 | real*8 TMID(L_LEVELS), PMID(L_LEVELS) |
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| 53 | real*8 COSBV(L_NLAYRAD,L_NSPECTV,L_NGAUSS) |
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| 54 | real*8 WBARV(L_NLAYRAD,L_NSPECTV,L_NGAUSS) |
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| 55 | |
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| 56 | ! for aerosols |
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| 57 | real*8 QXVAER(L_LEVELS,L_NSPECTV,NAERKIND) |
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| 58 | real*8 QSVAER(L_LEVELS,L_NSPECTV,NAERKIND) |
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| 59 | real*8 GVAER(L_LEVELS,L_NSPECTV,NAERKIND) |
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| 60 | real*8 TAUAERO(L_LEVELS,NAERKIND) |
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| 61 | real*8 TAUAEROLK(L_LEVELS,L_NSPECTV,NAERKIND) |
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| 62 | real*8 TAEROS(L_LEVELS,L_NSPECTV,NAERKIND) |
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| 63 | |
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| 64 | integer L, NW, NG, K, LK, IAER |
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| 65 | integer MT(L_LEVELS), MP(L_LEVELS), NP(L_LEVELS) |
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| 66 | real*8 ANS, TAUGAS |
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| 67 | real*8 TAURAY(L_NSPECTV) |
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| 68 | real*8 TRAY(L_LEVELS,L_NSPECTV) |
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| 69 | real*8 DPR(L_LEVELS), U(L_LEVELS) |
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| 70 | real*8 LCOEF(4), LKCOEF(L_LEVELS,4) |
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| 71 | |
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| 72 | real*8 taugsurf(L_NSPECTV,L_NGAUSS-1) |
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| 73 | real*8 DCONT,DAERO |
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| 74 | real*8 DRAYAER |
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| 75 | double precision wn_cont, p_cont, p_air, T_cont, dtemp, dtempc |
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| 76 | double precision p_cross |
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| 77 | |
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| 78 | ! variable species mixing ratio variables |
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| 79 | real*8 QVAR(L_LEVELS), WRATIO(L_LEVELS), MUVAR(L_LEVELS) |
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| 80 | real*8 KCOEF(4) |
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| 81 | integer NVAR(L_LEVELS) |
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| 82 | |
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| 83 | ! temporary variables to reduce memory access time to gasv |
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| 84 | real*8 tmpk(2,2) |
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| 85 | real*8 tmpkvar(2,2,2) |
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| 86 | |
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| 87 | ! temporary variables for multiple aerosol calculation |
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| 88 | real*8 atemp(L_NLAYRAD,L_NSPECTV) |
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| 89 | real*8 btemp(L_NLAYRAD,L_NSPECTV) |
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| 90 | real*8 ctemp(L_NLAYRAD,L_NSPECTV) |
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| 91 | |
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| 92 | ! variables for k in units m^-1 |
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| 93 | real*8 dz(L_LEVELS) |
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| 94 | real*8 Cmk |
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| 95 | |
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| 96 | integer igas, jgas |
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| 97 | |
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| 98 | integer interm |
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| 99 | |
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| 100 | !! AS: to save time in computing continuum (see bilinearbig) |
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| 101 | IF (.not.ALLOCATED(indv)) THEN |
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| 102 | ALLOCATE(indv(L_NSPECTV,ngasmx,ngasmx)) |
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| 103 | indv = -9999 ! this initial value means "to be calculated" |
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| 104 | ENDIF |
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| 105 | |
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| 106 | !======================================================================= |
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| 107 | ! Determine the total gas opacity throughout the column, for each |
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| 108 | ! spectral interval, NW, and each Gauss point, NG. |
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| 109 | ! Calculate the continuum opacities, i.e., those that do not depend on |
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| 110 | ! NG, the Gauss index. |
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| 111 | |
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| 112 | taugsurf(:,:) = 0.0 |
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| 113 | dpr(:) = 0.0 |
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| 114 | lkcoef(:,:) = 0.0 |
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| 115 | Cmk= 0.01 * 1.0 / (RG * RMD * 1.672621e-27) ! q_main=1.0 assumed. |
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| 116 | |
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| 117 | do K=2,L_LEVELS |
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| 118 | DPR(k) = PLEV(K)-PLEV(K-1) |
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| 119 | |
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| 120 | ! if we have continuum opacities, we need dz |
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| 121 | dz(k) = dpr(k)*R*TMID(K)/(RG*PMID(K)) |
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| 122 | U(k) = Cmk*DPR(k) |
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| 123 | |
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| 124 | call tpindex(PMID(K),TMID(K),QVAR(K),pfgasref,tgasref,& |
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| 125 | LCOEF,MT(K),MP(K),NVAR(K),WRATIO(K)) |
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| 126 | |
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| 127 | do LK=1,4 |
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| 128 | LKCOEF(K,LK) = LCOEF(LK) |
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| 129 | end do |
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| 130 | end do ! levels |
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| 131 | |
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| 132 | ! Spectral dependance of aerosol absorption |
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| 133 | !JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR |
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| 134 | ! but visible does not handle very well diffusion in first layer. |
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| 135 | ! The tauaero and tauray are thus set to 0 (a small value for rayleigh because the code crashes otherwise) |
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| 136 | ! in the 4 first semilayers in optcv, but not optci. |
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| 137 | ! This solves random variations of the sw heating at the model top. |
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| 138 | do iaer=1,naerkind |
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| 139 | do NW=1,L_NSPECTV |
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| 140 | TAEROS(1:4,NW,IAER)=0.d0 |
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| 141 | do K=5,L_LEVELS |
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| 142 | TAEROS(K,NW,IAER) = TAUAERO(K,IAER) * QXVAER(K,NW,IAER) |
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| 143 | end do ! levels |
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| 144 | end do |
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| 145 | end do |
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| 146 | |
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| 147 | ! Rayleigh scattering |
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| 148 | do NW=1,L_NSPECTV |
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| 149 | TRAY(1:4,NW) = 1d-30 |
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| 150 | do K=5,L_LEVELS |
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| 151 | TRAY(K,NW) = TAURAY(NW) * DPR(K) |
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| 152 | end do ! levels |
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| 153 | end do |
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| 154 | |
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| 155 | ! we ignore K=1... |
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| 156 | do K=2,L_LEVELS |
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| 157 | |
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| 158 | do NW=1,L_NSPECTV |
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| 159 | |
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| 160 | DRAYAER = TRAY(K,NW) |
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| 161 | ! DRAYAER is Tau RAYleigh scattering, plus AERosol opacity |
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| 162 | do iaer=1,naerkind |
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| 163 | DRAYAER = DRAYAER + TAEROS(K,NW,IAER) |
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| 164 | end do |
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| 165 | |
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| 166 | DCONT = 0.0 ! continuum absorption |
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| 167 | |
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| 168 | ! if(continuum)then |
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| 169 | ! include continua if necessary |
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| 170 | T_cont = dble(TMID(k)) |
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| 171 | do igas=1,ngasmx |
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| 172 | |
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| 173 | if(gfrac(igas).eq.-1)then ! variable |
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| 174 | p_cont = dble(PMID(k)*scalep*QVAR(k)) ! qvar = mol/mol |
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| 175 | else |
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| 176 | p_cont = dble(PMID(k)*scalep*gfrac(igas)*(1.-QVAR(k))) |
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| 177 | endif |
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| 178 | |
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| 179 | do jgas=1,ngasmx |
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| 180 | if(gfrac(jgas).eq.-1)then ! variable |
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| 181 | p_cross = dble(PMID(k)*scalep*QVAR(k)) ! qvar = mol/mol |
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| 182 | else |
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| 183 | p_cross = dble(PMID(k)*scalep*gfrac(jgas)*(1.-QVAR(k))) |
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| 184 | endif |
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| 185 | |
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| 186 | dtemp=0.0 |
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| 187 | |
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| 188 | ! For Venus: only H2O and CO2 |
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| 189 | if ( ((igas .eq. igas_H2O) .and. (jgas .eq. igas_H2O)) .or. & |
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| 190 | ((igas .eq. igas_H2O) .and. (jgas .eq. igas_CO2)) .or. & |
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| 191 | ((igas .eq. igas_CO2) .and. (jgas .eq. igas_CO2)) ) then |
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| 192 | |
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| 193 | call interpolate_continuum('',igas,jgas,'VI',nw,T_cont,p_cont,p_cross,dtemp,.false.) |
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| 194 | |
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| 195 | endif |
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| 196 | |
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| 197 | DCONT = DCONT + dtemp |
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| 198 | |
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| 199 | enddo ! jgas=1,ngasmx |
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| 200 | enddo ! igas=1,ngasmx |
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| 201 | |
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| 202 | DCONT = DCONT*dz(k) |
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| 203 | |
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| 204 | ! endif |
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| 205 | |
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| 206 | do ng=1,L_NGAUSS-1 |
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| 207 | |
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| 208 | ! Now compute TAUGAS |
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| 209 | |
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| 210 | ! Interpolate between water mixing ratios |
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| 211 | ! WRATIO = 0.0 if the requested water amount is equal to, or outside the |
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| 212 | ! the water data range |
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| 213 | |
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| 214 | if(L_REFVAR.eq.1)then ! added by RW for special no variable case |
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| 215 | |
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| 216 | ! JVO 2017 : added tmpk because the repeated calls to gasi/v increased dramatically |
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| 217 | ! the execution time of optci/v -> ~ factor 2 on the whole radiative |
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| 218 | ! transfer on the tested simulations ! |
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| 219 | |
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| 220 | tmpk = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,1,NW,NG) |
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| 221 | |
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| 222 | KCOEF(1) = tmpk(1,1) ! KCOEF(1) = GASV(MT(K),MP(K),1,NW,NG) |
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| 223 | KCOEF(2) = tmpk(1,2) ! KCOEF(2) = GASV(MT(K),MP(K)+1,1,NW,NG) |
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| 224 | KCOEF(3) = tmpk(2,2) ! KCOEF(3) = GASV(MT(K)+1,MP(K)+1,1,NW,NG) |
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| 225 | KCOEF(4) = tmpk(2,1) ! KCOEF(4) = GASV(MT(K)+1,MP(K),1,NW,NG) |
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| 226 | |
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| 227 | else |
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| 228 | |
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| 229 | tmpkvar = GASV(MT(K):MT(K)+1,MP(K):MP(K)+1,NVAR(K):NVAR(K)+1,NW,NG) |
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| 230 | |
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| 231 | KCOEF(1) = tmpkvar(1,1,1) + WRATIO(K) * & |
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| 232 | ( tmpkvar(1,1,2)-tmpkvar(1,1,1) ) |
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| 233 | |
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| 234 | KCOEF(2) = tmpkvar(1,2,1) + WRATIO(K) * & |
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| 235 | ( tmpkvar(1,2,2)-tmpkvar(1,2,1) ) |
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| 236 | |
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| 237 | KCOEF(3) = tmpkvar(2,2,1) + WRATIO(K) * & |
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| 238 | ( tmpkvar(2,2,2)-tmpkvar(2,2,1) ) |
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| 239 | |
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| 240 | KCOEF(4) = tmpkvar(2,1,1) + WRATIO(K) * & |
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| 241 | ( tmpkvar(2,1,2)-tmpkvar(2,1,1) ) |
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| 242 | |
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| 243 | |
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| 244 | endif |
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| 245 | |
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| 246 | ! Interpolate the gaseous k-coefficients to the requested T,P values |
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| 247 | |
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| 248 | ANS = LKCOEF(K,1)*KCOEF(1) + LKCOEF(K,2)*KCOEF(2) + & |
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| 249 | LKCOEF(K,3)*KCOEF(3) + LKCOEF(K,4)*KCOEF(4) |
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| 250 | |
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| 251 | TAUGAS = U(k)*ANS |
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| 252 | |
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| 253 | TAUGSURF(NW,NG) = TAUGSURF(NW,NG) + TAUGAS + DCONT |
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| 254 | DTAUKV(K,nw,ng) = TAUGAS & |
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| 255 | + DRAYAER & ! DRAYAER includes all scattering contributions |
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| 256 | + DCONT ! For parameterized continuum aborption |
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| 257 | |
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| 258 | end do |
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| 259 | |
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| 260 | ! Now fill in the "clear" part of the spectrum (NG = L_NGAUSS), |
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| 261 | ! which holds continuum opacity only |
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| 262 | |
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| 263 | NG = L_NGAUSS |
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| 264 | DTAUKV(K,nw,ng) = DRAYAER + DCONT ! Scattering + parameterized continuum absorption |
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| 265 | |
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| 266 | end do |
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| 267 | end do |
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| 268 | |
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| 269 | |
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| 270 | !======================================================================= |
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| 271 | ! Now the full treatment for the layers, where besides the opacity |
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| 272 | ! we need to calculate the scattering albedo and asymmetry factors |
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| 273 | |
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| 274 | !JL18 It seems to be good to have aerosols in the first "radiative layer" of the gcm in the IR |
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| 275 | ! but not in the visible |
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| 276 | ! The tauaero is thus set to 0 in the 4 first semilayers in optcv, but not optci. |
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| 277 | ! This solves random variations of the sw heating at the model top. |
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| 278 | do iaer=1,naerkind |
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| 279 | DO NW=1,L_NSPECTV |
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| 280 | TAUAEROLK(1:4,NW,IAER)=0.d0 |
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| 281 | DO K=5,L_LEVELS |
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| 282 | TAUAEROLK(K,NW,IAER) = TAUAERO(K,IAER) * QSVAER(K,NW,IAER) ! effect of scattering albedo |
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| 283 | ENDDO |
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| 284 | ENDDO |
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| 285 | end do |
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| 286 | |
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| 287 | DO NW=1,L_NSPECTV |
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| 288 | DO L=1,L_NLAYRAD-1 |
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| 289 | K = 2*L+1 |
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| 290 | atemp(L,NW) = SUM(GVAER(K,NW,1:naerkind) * TAUAEROLK(K,NW,1:naerkind))+SUM(GVAER(K+1,NW,1:naerkind) * TAUAEROLK(K+1,NW,1:naerkind)) |
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| 291 | btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) + SUM(TAUAEROLK(K+1,NW,1:naerkind)) |
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| 292 | ctemp(L,NW) = btemp(L,NW) + 0.9999*(TRAY(K,NW) + TRAY(K+1,NW)) ! JVO 2017 : does this 0.999 is really meaningful ? |
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| 293 | btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) + TRAY(K+1,NW) |
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| 294 | COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW) |
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| 295 | END DO ! L vertical loop |
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| 296 | |
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| 297 | ! Last level |
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| 298 | L = L_NLAYRAD |
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| 299 | K = 2*L+1 |
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| 300 | atemp(L,NW) = SUM(GVAER(K,NW,1:naerkind) * TAUAEROLK(K,NW,1:naerkind)) |
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| 301 | btemp(L,NW) = SUM(TAUAEROLK(K,NW,1:naerkind)) |
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| 302 | ctemp(L,NW) = btemp(L,NW) + 0.9999*TRAY(K,NW) ! JVO 2017 : does this 0.999 is really meaningful ? |
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| 303 | btemp(L,NW) = btemp(L,NW) + TRAY(K,NW) |
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| 304 | COSBV(L,NW,1:L_NGAUSS) = atemp(L,NW)/btemp(L,NW) |
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| 305 | |
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| 306 | |
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| 307 | END DO ! NW spectral loop |
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| 308 | |
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| 309 | DO NG=1,L_NGAUSS |
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| 310 | DO NW=1,L_NSPECTV |
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| 311 | DO L=1,L_NLAYRAD-1 |
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| 312 | |
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| 313 | K = 2*L+1 |
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| 314 | DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) + DTAUKV(K+1,NW,NG) |
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| 315 | WBARV(L,nw,ng) = ctemp(L,NW) / DTAUV(L,nw,ng) |
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| 316 | |
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| 317 | END DO ! L vertical loop |
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| 318 | |
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| 319 | ! Last level |
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| 320 | |
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| 321 | L = L_NLAYRAD |
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| 322 | K = 2*L+1 |
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| 323 | DTAUV(L,nw,ng) = DTAUKV(K,NW,NG) |
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| 324 | |
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| 325 | WBARV(L,NW,NG) = ctemp(L,NW) / DTAUV(L,NW,NG) |
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| 326 | |
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| 327 | END DO ! NW spectral loop |
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| 328 | END DO ! NG Gauss loop |
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| 329 | |
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| 330 | ! Total extinction optical depths |
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| 331 | |
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| 332 | DO NG=1,L_NGAUSS ! full gauss loop |
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| 333 | DO NW=1,L_NSPECTV |
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| 334 | TAUCUMV(1,NW,NG)=0.0D0 |
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| 335 | DO K=2,L_LEVELS |
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| 336 | TAUCUMV(K,NW,NG)=TAUCUMV(K-1,NW,NG)+DTAUKV(K,NW,NG) |
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| 337 | END DO |
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| 338 | |
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| 339 | DO L=1,L_NLAYRAD |
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| 340 | TAUV(L,NW,NG)=TAUCUMV(2*L,NW,NG) |
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| 341 | END DO |
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| 342 | TAUV(L,NW,NG)=TAUCUMV(2*L_NLAYRAD+1,NW,NG) |
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| 343 | END DO |
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| 344 | END DO ! end full gauss loop |
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| 345 | |
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| 346 | |
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| 347 | |
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| 348 | |
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| 349 | end subroutine optcv |
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| 350 | |
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| 351 | END MODULE optcv_mod |
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