| 1 | ! path: $Source$ |
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| 2 | ! author: $Author: mike $ |
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| 3 | ! revision: $Revision: 11661 $ |
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| 4 | ! created: $Date: 2009-05-22 18:22:22 -0400 (Fri, 22 May 2009) $ |
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| 5 | |
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| 6 | module rrtmg_sw_spcvrt |
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| 7 | |
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| 8 | ! -------------------------------------------------------------------------- |
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| 9 | ! | | |
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| 10 | ! | Copyright 2002-2009, Atmospheric & Environmental Research, Inc. (AER). | |
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| 11 | ! | This software may be used, copied, or redistributed as long as it is | |
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| 12 | ! | not sold and this copyright notice is reproduced on each copy made. | |
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| 13 | ! | This model is provided as is without any express or implied warranties. | |
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| 14 | ! | (http://www.rtweb.aer.com/) | |
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| 15 | ! | | |
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| 16 | ! -------------------------------------------------------------------------- |
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| 17 | |
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| 18 | ! ------- Modules ------- |
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| 19 | |
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| 20 | use parkind, only : im => kind_im, rb => kind_rb |
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| 21 | use parrrsw, only : nbndsw, ngptsw, mxmol, jpband |
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| 22 | use rrsw_tbl, only : tblint, bpade, od_lo, exp_tbl |
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| 23 | use rrsw_vsn, only : hvrspv, hnamspv |
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| 24 | use rrsw_wvn, only : ngc, ngs |
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| 25 | use rrtmg_sw_reftra, only: reftra_sw |
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| 26 | use rrtmg_sw_taumol, only: taumol_sw |
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| 27 | use rrtmg_sw_vrtqdr, only: vrtqdr_sw |
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| 28 | |
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| 29 | implicit none |
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| 30 | |
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| 31 | contains |
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| 32 | |
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| 33 | ! --------------------------------------------------------------------------- |
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| 34 | subroutine spcvrt_sw & |
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| 35 | (nlayers, istart, iend, icpr, idelm, iout, & |
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| 36 | pavel, tavel, pz, tz, tbound, palbd, palbp, & |
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| 37 | pclfr, ptauc, pasyc, pomgc, ptaucorig, & |
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| 38 | ptaua, pasya, pomga, prmu0, coldry, wkl, adjflux, & |
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| 39 | laytrop, layswtch, laylow, jp, jt, jt1, & |
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| 40 | co2mult, colch4, colco2, colh2o, colmol, coln2o, colo2, colo3, & |
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| 41 | fac00, fac01, fac10, fac11, & |
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| 42 | selffac, selffrac, indself, forfac, forfrac, indfor, & |
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| 43 | pbbfd, pbbfu, pbbcd, pbbcu, puvfd, puvcd, pnifd, pnicd, & |
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| 44 | pbbfddir, pbbcddir, puvfddir, puvcddir, pnifddir, pnicddir) |
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| 45 | ! --------------------------------------------------------------------------- |
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| 46 | ! |
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| 47 | ! Purpose: Contains spectral loop to compute the shortwave radiative fluxes, |
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| 48 | ! using the two-stream method of H. Barker. |
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| 49 | ! |
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| 50 | ! Interface: *spcvrt_sw* is called from *rrtmg_sw.F90* or rrtmg_sw.1col.F90* |
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| 51 | ! |
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| 52 | ! Method: |
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| 53 | ! Adapted from two-stream model of H. Barker; |
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| 54 | ! Two-stream model options (selected with kmodts in rrtmg_sw_reftra.F90): |
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| 55 | ! 1: Eddington, 2: PIFM, Zdunkowski et al., 3: discret ordinates |
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| 56 | ! |
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| 57 | ! Modifications: |
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| 58 | ! |
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| 59 | ! Original: H. Barker |
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| 60 | ! Revision: Merge with RRTMG_SW: J.-J.Morcrette, ECMWF, Feb 2003 |
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| 61 | ! Revision: Add adjustment for Earth/Sun distance : MJIacono, AER, Oct 2003 |
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| 62 | ! Revision: Bug fix for use of PALBP and PALBD: MJIacono, AER, Nov 2003 |
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| 63 | ! Revision: Bug fix to apply delta scaling to clear sky: AER, Dec 2004 |
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| 64 | ! Revision: Code modified so that delta scaling is not done in cloudy profiles |
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| 65 | ! if routine cldprop is used; delta scaling can be applied by swithcing |
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| 66 | ! code below if cldprop is not used to get cloud properties. |
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| 67 | ! AER, Jan 2005 |
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| 68 | ! Revision: Uniform formatting for RRTMG: MJIacono, AER, Jul 2006 |
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| 69 | ! Revision: Use exponential lookup table for transmittance: MJIacono, AER, |
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| 70 | ! Aug 2007 |
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| 71 | ! |
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| 72 | ! ------------------------------------------------------------------ |
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| 73 | |
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| 74 | ! ------- Declarations ------ |
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| 75 | |
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| 76 | ! -------- Input ------- |
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| 77 | |
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| 78 | integer(kind=im), intent(in) :: nlayers |
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| 79 | integer(kind=im), intent(in) :: istart |
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| 80 | integer(kind=im), intent(in) :: iend |
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| 81 | integer(kind=im), intent(in) :: icpr |
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| 82 | integer(kind=im), intent(in) :: idelm ! delta-m scaling flag |
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| 83 | ! [0 = direct and diffuse fluxes are unscaled] |
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| 84 | ! [1 = direct and diffuse fluxes are scaled] |
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| 85 | integer(kind=im), intent(in) :: iout |
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| 86 | integer(kind=im), intent(in) :: laytrop |
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| 87 | integer(kind=im), intent(in) :: layswtch |
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| 88 | integer(kind=im), intent(in) :: laylow |
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| 89 | |
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| 90 | integer(kind=im), intent(in) :: indfor(:) |
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| 91 | ! Dimensions: (nlayers) |
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| 92 | integer(kind=im), intent(in) :: indself(:) |
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| 93 | ! Dimensions: (nlayers) |
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| 94 | integer(kind=im), intent(in) :: jp(:) |
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| 95 | ! Dimensions: (nlayers) |
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| 96 | integer(kind=im), intent(in) :: jt(:) |
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| 97 | ! Dimensions: (nlayers) |
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| 98 | integer(kind=im), intent(in) :: jt1(:) |
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| 99 | ! Dimensions: (nlayers) |
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| 100 | |
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| 101 | real(kind=rb), intent(in) :: pavel(:) ! layer pressure (hPa, mb) |
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| 102 | ! Dimensions: (nlayers) |
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| 103 | real(kind=rb), intent(in) :: tavel(:) ! layer temperature (K) |
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| 104 | ! Dimensions: (nlayers) |
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| 105 | real(kind=rb), intent(in) :: pz(0:) ! level (interface) pressure (hPa, mb) |
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| 106 | ! Dimensions: (0:nlayers) |
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| 107 | real(kind=rb), intent(in) :: tz(0:) ! level temperatures (hPa, mb) |
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| 108 | ! Dimensions: (0:nlayers) |
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| 109 | real(kind=rb), intent(in) :: tbound ! surface temperature (K) |
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| 110 | real(kind=rb), intent(in) :: wkl(:,:) ! molecular amounts (mol/cm2) |
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| 111 | ! Dimensions: (mxmol,nlayers) |
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| 112 | real(kind=rb), intent(in) :: coldry(:) ! dry air column density (mol/cm2) |
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| 113 | ! Dimensions: (nlayers) |
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| 114 | real(kind=rb), intent(in) :: colmol(:) |
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| 115 | ! Dimensions: (nlayers) |
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| 116 | real(kind=rb), intent(in) :: adjflux(:) ! Earth/Sun distance adjustment |
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| 117 | ! Dimensions: (jpband) |
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| 118 | |
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| 119 | real(kind=rb), intent(in) :: palbd(:) ! surface albedo (diffuse) |
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| 120 | ! Dimensions: (nbndsw) |
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| 121 | real(kind=rb), intent(in) :: palbp(:) ! surface albedo (direct) |
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| 122 | ! Dimensions: (nbndsw) |
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| 123 | real(kind=rb), intent(in) :: prmu0 ! cosine of solar zenith angle |
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| 124 | real(kind=rb), intent(in) :: pclfr(:) ! cloud fraction |
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| 125 | ! Dimensions: (nlayers) |
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| 126 | real(kind=rb), intent(in) :: ptauc(:,:) ! cloud optical depth |
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| 127 | ! Dimensions: (nlayers,nbndsw) |
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| 128 | real(kind=rb), intent(in) :: pasyc(:,:) ! cloud asymmetry parameter |
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| 129 | ! Dimensions: (nlayers,nbndsw) |
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| 130 | real(kind=rb), intent(in) :: pomgc(:,:) ! cloud single scattering albedo |
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| 131 | ! Dimensions: (nlayers,nbndsw) |
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| 132 | real(kind=rb), intent(in) :: ptaucorig(:,:) ! cloud optical depth, non-delta scaled |
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| 133 | ! Dimensions: (nlayers,nbndsw) |
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| 134 | real(kind=rb), intent(in) :: ptaua(:,:) ! aerosol optical depth |
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| 135 | ! Dimensions: (nlayers,nbndsw) |
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| 136 | real(kind=rb), intent(in) :: pasya(:,:) ! aerosol asymmetry parameter |
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| 137 | ! Dimensions: (nlayers,nbndsw) |
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| 138 | real(kind=rb), intent(in) :: pomga(:,:) ! aerosol single scattering albedo |
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| 139 | ! Dimensions: (nlayers,nbndsw) |
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| 140 | |
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| 141 | real(kind=rb), intent(in) :: colh2o(:) |
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| 142 | ! Dimensions: (nlayers) |
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| 143 | real(kind=rb), intent(in) :: colco2(:) |
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| 144 | ! Dimensions: (nlayers) |
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| 145 | real(kind=rb), intent(in) :: colch4(:) |
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| 146 | ! Dimensions: (nlayers) |
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| 147 | real(kind=rb), intent(in) :: co2mult(:) |
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| 148 | ! Dimensions: (nlayers) |
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| 149 | real(kind=rb), intent(in) :: colo3(:) |
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| 150 | ! Dimensions: (nlayers) |
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| 151 | real(kind=rb), intent(in) :: colo2(:) |
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| 152 | ! Dimensions: (nlayers) |
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| 153 | real(kind=rb), intent(in) :: coln2o(:) |
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| 154 | ! Dimensions: (nlayers) |
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| 155 | |
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| 156 | real(kind=rb), intent(in) :: forfac(:) |
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| 157 | ! Dimensions: (nlayers) |
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| 158 | real(kind=rb), intent(in) :: forfrac(:) |
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| 159 | ! Dimensions: (nlayers) |
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| 160 | real(kind=rb), intent(in) :: selffac(:) |
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| 161 | ! Dimensions: (nlayers) |
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| 162 | real(kind=rb), intent(in) :: selffrac(:) |
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| 163 | ! Dimensions: (nlayers) |
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| 164 | real(kind=rb), intent(in) :: fac00(:) |
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| 165 | ! Dimensions: (nlayers) |
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| 166 | real(kind=rb), intent(in) :: fac01(:) |
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| 167 | ! Dimensions: (nlayers) |
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| 168 | real(kind=rb), intent(in) :: fac10(:) |
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| 169 | ! Dimensions: (nlayers) |
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| 170 | real(kind=rb), intent(in) :: fac11(:) |
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| 171 | ! Dimensions: (nlayers) |
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| 172 | |
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| 173 | ! ------- Output ------- |
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| 174 | ! All Dimensions: (nlayers+1) |
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| 175 | real(kind=rb), intent(out) :: pbbcd(:) |
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| 176 | real(kind=rb), intent(out) :: pbbcu(:) |
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| 177 | real(kind=rb), intent(out) :: pbbfd(:) |
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| 178 | real(kind=rb), intent(out) :: pbbfu(:) |
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| 179 | real(kind=rb), intent(out) :: pbbfddir(:) |
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| 180 | real(kind=rb), intent(out) :: pbbcddir(:) |
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| 181 | |
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| 182 | real(kind=rb), intent(out) :: puvcd(:) |
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| 183 | real(kind=rb), intent(out) :: puvfd(:) |
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| 184 | real(kind=rb), intent(out) :: puvcddir(:) |
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| 185 | real(kind=rb), intent(out) :: puvfddir(:) |
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| 186 | |
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| 187 | real(kind=rb), intent(out) :: pnicd(:) |
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| 188 | real(kind=rb), intent(out) :: pnifd(:) |
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| 189 | real(kind=rb), intent(out) :: pnicddir(:) |
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| 190 | real(kind=rb), intent(out) :: pnifddir(:) |
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| 191 | |
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| 192 | ! Output - inactive ! All Dimensions: (nlayers+1) |
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| 193 | ! real(kind=rb), intent(out) :: puvcu(:) |
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| 194 | ! real(kind=rb), intent(out) :: puvfu(:) |
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| 195 | ! real(kind=rb), intent(out) :: pnicu(:) |
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| 196 | ! real(kind=rb), intent(out) :: pnifu(:) |
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| 197 | ! real(kind=rb), intent(out) :: pvscd(:) |
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| 198 | ! real(kind=rb), intent(out) :: pvscu(:) |
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| 199 | ! real(kind=rb), intent(out) :: pvsfd(:) |
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| 200 | ! real(kind=rb), intent(out) :: pvsfu(:) |
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| 201 | |
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| 202 | |
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| 203 | ! ------- Local ------- |
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| 204 | |
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| 205 | logical :: lrtchkclr(nlayers),lrtchkcld(nlayers) |
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| 206 | |
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| 207 | integer(kind=im) :: klev |
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| 208 | integer(kind=im) :: ib1, ib2, ibm, igt, ikl, ikp, ikx |
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| 209 | integer(kind=im) :: iw, jb, jg, jl, jk |
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| 210 | ! integer(kind=im), parameter :: nuv = ?? |
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| 211 | ! integer(kind=im), parameter :: nvs = ?? |
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| 212 | integer(kind=im) :: itind |
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| 213 | |
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| 214 | real(kind=rb) :: tblind, ze1 |
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| 215 | real(kind=rb) :: zclear, zcloud |
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| 216 | real(kind=rb) :: zdbt(nlayers+1), zdbt_nodel(nlayers+1) |
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| 217 | real(kind=rb) :: zgc(nlayers), zgcc(nlayers), zgco(nlayers) |
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| 218 | real(kind=rb) :: zomc(nlayers), zomcc(nlayers), zomco(nlayers) |
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| 219 | real(kind=rb) :: zrdnd(nlayers+1), zrdndc(nlayers+1) |
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| 220 | real(kind=rb) :: zref(nlayers+1), zrefc(nlayers+1), zrefo(nlayers+1) |
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| 221 | real(kind=rb) :: zrefd(nlayers+1), zrefdc(nlayers+1), zrefdo(nlayers+1) |
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| 222 | real(kind=rb) :: zrup(nlayers+1), zrupd(nlayers+1) |
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| 223 | real(kind=rb) :: zrupc(nlayers+1), zrupdc(nlayers+1) |
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| 224 | real(kind=rb) :: zs1(nlayers+1) |
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| 225 | real(kind=rb) :: ztauc(nlayers), ztauo(nlayers) |
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| 226 | real(kind=rb) :: ztdn(nlayers+1), ztdnd(nlayers+1), ztdbt(nlayers+1) |
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| 227 | real(kind=rb) :: ztoc(nlayers), ztor(nlayers) |
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| 228 | real(kind=rb) :: ztra(nlayers+1), ztrac(nlayers+1), ztrao(nlayers+1) |
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| 229 | real(kind=rb) :: ztrad(nlayers+1), ztradc(nlayers+1), ztrado(nlayers+1) |
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| 230 | real(kind=rb) :: zdbtc(nlayers+1), ztdbtc(nlayers+1) |
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| 231 | real(kind=rb) :: zincflx(ngptsw), zdbtc_nodel(nlayers+1) |
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| 232 | real(kind=rb) :: ztdbt_nodel(nlayers+1), ztdbtc_nodel(nlayers+1) |
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| 233 | |
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| 234 | real(kind=rb) :: zdbtmc, zdbtmo, zf, zgw, zreflect |
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| 235 | real(kind=rb) :: zwf, tauorig, repclc |
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| 236 | ! real(kind=rb) :: zincflux ! inactive |
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| 237 | |
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| 238 | ! Arrays from rrtmg_sw_taumoln routines |
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| 239 | |
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| 240 | ! real(kind=rb) :: ztaug(nlayers,16), ztaur(nlayers,16) |
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| 241 | ! real(kind=rb) :: zsflxzen(16) |
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| 242 | real(kind=rb) :: ztaug(nlayers,ngptsw), ztaur(nlayers,ngptsw) |
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| 243 | real(kind=rb) :: zsflxzen(ngptsw) |
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| 244 | |
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| 245 | ! Arrays from rrtmg_sw_vrtqdr routine |
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| 246 | |
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| 247 | real(kind=rb) :: zcd(nlayers+1,ngptsw), zcu(nlayers+1,ngptsw) |
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| 248 | real(kind=rb) :: zfd(nlayers+1,ngptsw), zfu(nlayers+1,ngptsw) |
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| 249 | |
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| 250 | ! Inactive arrays |
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| 251 | ! real(kind=rb) :: zbbcd(nlayers+1), zbbcu(nlayers+1) |
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| 252 | ! real(kind=rb) :: zbbfd(nlayers+1), zbbfu(nlayers+1) |
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| 253 | ! real(kind=rb) :: zbbfddir(nlayers+1), zbbcddir(nlayers+1) |
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| 254 | |
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| 255 | ! ------------------------------------------------------------------ |
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| 256 | |
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| 257 | ! Initializations |
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| 258 | |
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| 259 | ib1 = istart |
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| 260 | ib2 = iend |
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| 261 | klev = nlayers |
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| 262 | iw = 0 |
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| 263 | repclc = 1.e-12_rb |
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| 264 | ! zincflux = 0.0_rb |
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| 265 | |
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| 266 | do jk=1,klev+1 |
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| 267 | pbbcd(jk)=0._rb |
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| 268 | pbbcu(jk)=0._rb |
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| 269 | pbbfd(jk)=0._rb |
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| 270 | pbbfu(jk)=0._rb |
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| 271 | pbbcddir(jk)=0._rb |
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| 272 | pbbfddir(jk)=0._rb |
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| 273 | puvcd(jk)=0._rb |
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| 274 | puvfd(jk)=0._rb |
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| 275 | puvcddir(jk)=0._rb |
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| 276 | puvfddir(jk)=0._rb |
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| 277 | pnicd(jk)=0._rb |
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| 278 | pnifd(jk)=0._rb |
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| 279 | pnicddir(jk)=0._rb |
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| 280 | pnifddir(jk)=0._rb |
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| 281 | enddo |
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| 282 | |
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| 283 | |
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| 284 | ! Calculate the optical depths for gaseous absorption and Rayleigh scattering |
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| 285 | |
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| 286 | call taumol_sw(klev, & |
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| 287 | colh2o, colco2, colch4, colo2, colo3, colmol, & |
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| 288 | laytrop, jp, jt, jt1, & |
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| 289 | fac00, fac01, fac10, fac11, & |
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| 290 | selffac, selffrac, indself, forfac, forfrac, indfor, & |
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| 291 | zsflxzen, ztaug, ztaur) |
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| 292 | |
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| 293 | |
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| 294 | ! Top of shortwave spectral band loop, jb = 16 -> 29; ibm = 1 -> 14 |
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| 295 | |
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| 296 | do jb = ib1, ib2 |
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| 297 | ibm = jb-15 |
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| 298 | igt = ngc(ibm) |
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| 299 | |
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| 300 | ! Reinitialize g-point counter for each band if output for each band is requested. |
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| 301 | if (iout.gt.0.and.ibm.ge.2) iw = ngs(ibm-1) |
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| 302 | |
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| 303 | ! do jk=1,klev+1 |
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| 304 | ! zbbcd(jk)=0.0_rb |
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| 305 | ! zbbcu(jk)=0.0_rb |
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| 306 | ! zbbfd(jk)=0.0_rb |
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| 307 | ! zbbfu(jk)=0.0_rb |
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| 308 | ! enddo |
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| 309 | |
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| 310 | ! Top of g-point interval loop within each band (iw is cumulative counter) |
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| 311 | do jg = 1,igt |
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| 312 | iw = iw+1 |
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| 313 | |
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| 314 | ! Apply adjustments for correct Earth/Sun distance and zenith angle to incoming solar flux |
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| 315 | zincflx(iw) = adjflux(jb) * zsflxzen(iw) * prmu0 |
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| 316 | ! zincflux = zincflux + adjflux(jb) * zsflxzen(iw) * prmu0 ! inactive |
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| 317 | |
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| 318 | ! Compute layer reflectances and transmittances for direct and diffuse sources, |
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| 319 | ! first clear then cloudy |
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| 320 | |
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| 321 | ! zrefc(jk) direct albedo for clear |
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| 322 | ! zrefo(jk) direct albedo for cloud |
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| 323 | ! zrefdc(jk) diffuse albedo for clear |
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| 324 | ! zrefdo(jk) diffuse albedo for cloud |
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| 325 | ! ztrac(jk) direct transmittance for clear |
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| 326 | ! ztrao(jk) direct transmittance for cloudy |
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| 327 | ! ztradc(jk) diffuse transmittance for clear |
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| 328 | ! ztrado(jk) diffuse transmittance for cloudy |
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| 329 | ! |
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| 330 | ! zref(jk) direct reflectance |
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| 331 | ! zrefd(jk) diffuse reflectance |
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| 332 | ! ztra(jk) direct transmittance |
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| 333 | ! ztrad(jk) diffuse transmittance |
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| 334 | ! |
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| 335 | ! zdbtc(jk) clear direct beam transmittance |
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| 336 | ! zdbto(jk) cloudy direct beam transmittance |
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| 337 | ! zdbt(jk) layer mean direct beam transmittance |
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| 338 | ! ztdbt(jk) total direct beam transmittance at levels |
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| 339 | |
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| 340 | ! Clear-sky |
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| 341 | ! TOA direct beam |
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| 342 | ztdbtc(1)=1.0_rb |
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| 343 | ztdbtc_nodel(1)=1.0_rb |
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| 344 | ! Surface values |
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| 345 | zdbtc(klev+1) =0.0_rb |
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| 346 | ztrac(klev+1) =0.0_rb |
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| 347 | ztradc(klev+1)=0.0_rb |
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| 348 | zrefc(klev+1) =palbp(ibm) |
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| 349 | zrefdc(klev+1)=palbd(ibm) |
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| 350 | zrupc(klev+1) =palbp(ibm) |
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| 351 | zrupdc(klev+1)=palbd(ibm) |
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| 352 | |
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| 353 | ! Cloudy-sky |
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| 354 | ! Surface values |
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| 355 | ztrao(klev+1) =0.0_rb |
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| 356 | ztrado(klev+1)=0.0_rb |
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| 357 | zrefo(klev+1) =palbp(ibm) |
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| 358 | zrefdo(klev+1)=palbd(ibm) |
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| 359 | |
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| 360 | ! Total sky |
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| 361 | ! TOA direct beam |
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| 362 | ztdbt(1)=1.0_rb |
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| 363 | ztdbt_nodel(1)=1.0_rb |
|---|
| 364 | ! Surface values |
|---|
| 365 | zdbt(klev+1) =0.0_rb |
|---|
| 366 | ztra(klev+1) =0.0_rb |
|---|
| 367 | ztrad(klev+1)=0.0_rb |
|---|
| 368 | zref(klev+1) =palbp(ibm) |
|---|
| 369 | zrefd(klev+1)=palbd(ibm) |
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| 370 | zrup(klev+1) =palbp(ibm) |
|---|
| 371 | zrupd(klev+1)=palbd(ibm) |
|---|
| 372 | |
|---|
| 373 | |
|---|
| 374 | ! Top of layer loop |
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| 375 | do jk=1,klev |
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| 376 | |
|---|
| 377 | ! Note: two-stream calculations proceed from top to bottom; |
|---|
| 378 | ! RRTMG_SW quantities are given bottom to top and are reversed here |
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| 379 | |
|---|
| 380 | ikl=klev+1-jk |
|---|
| 381 | |
|---|
| 382 | ! Set logical flag to do REFTRA calculation |
|---|
| 383 | ! Do REFTRA for all clear layers |
|---|
| 384 | lrtchkclr(jk)=.true. |
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| 385 | |
|---|
| 386 | ! Do REFTRA only for cloudy layers in profile, since already done for clear layers |
|---|
| 387 | lrtchkcld(jk)=.false. |
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| 388 | lrtchkcld(jk)=(pclfr(ikl) > repclc) |
|---|
| 389 | |
|---|
| 390 | ! Clear-sky optical parameters - this section inactive |
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| 391 | ! Original |
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| 392 | ! ztauc(jk) = ztaur(ikl,iw) + ztaug(ikl,iw) |
|---|
| 393 | ! zomcc(jk) = ztaur(ikl,iw) / ztauc(jk) |
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| 394 | ! zgcc(jk) = 0.0001_rb |
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| 395 | ! Total sky optical parameters |
|---|
| 396 | ! ztauo(jk) = ztaur(ikl,iw) + ztaug(ikl,iw) + ptauc(ikl,ibm) |
|---|
| 397 | ! zomco(jk) = ptauc(ikl,ibm) * pomgc(ikl,ibm) + ztaur(ikl,iw) |
|---|
| 398 | ! zgco (jk) = (ptauc(ikl,ibm) * pomgc(ikl,ibm) * pasyc(ikl,ibm) + & |
|---|
| 399 | ! ztaur(ikl,iw) * 0.0001_rb) / zomco(jk) |
|---|
| 400 | ! zomco(jk) = zomco(jk) / ztauo(jk) |
|---|
| 401 | |
|---|
| 402 | ! Clear-sky optical parameters including aerosols |
|---|
| 403 | ztauc(jk) = ztaur(ikl,iw) + ztaug(ikl,iw) + ptaua(ikl,ibm) |
|---|
| 404 | zomcc(jk) = ztaur(ikl,iw) * 1.0_rb + ptaua(ikl,ibm) * pomga(ikl,ibm) |
|---|
| 405 | zgcc(jk) = pasya(ikl,ibm) * pomga(ikl,ibm) * ptaua(ikl,ibm) / zomcc(jk) |
|---|
| 406 | zomcc(jk) = zomcc(jk) / ztauc(jk) |
|---|
| 407 | |
|---|
| 408 | ! Pre-delta-scaling clear and cloudy direct beam transmittance (must use 'orig', unscaled cloud OD) |
|---|
| 409 | ! \/\/\/ This block of code is only needed for unscaled direct beam calculation |
|---|
| 410 | if (idelm .eq. 0) then |
|---|
| 411 | ! |
|---|
| 412 | zclear = 1.0_rb - pclfr(ikl) |
|---|
| 413 | zcloud = pclfr(ikl) |
|---|
| 414 | |
|---|
| 415 | ! Clear |
|---|
| 416 | ! zdbtmc = exp(-ztauc(jk) / prmu0) |
|---|
| 417 | |
|---|
| 418 | ! Use exponential lookup table for transmittance, or expansion of exponential for low tau |
|---|
| 419 | ze1 = ztauc(jk) / prmu0 |
|---|
| 420 | if (ze1 .le. od_lo) then |
|---|
| 421 | zdbtmc = 1._rb - ze1 + 0.5_rb * ze1 * ze1 |
|---|
| 422 | else |
|---|
| 423 | tblind = ze1 / (bpade + ze1) |
|---|
| 424 | itind = tblint * tblind + 0.5_rb |
|---|
| 425 | zdbtmc = exp_tbl(itind) |
|---|
| 426 | endif |
|---|
| 427 | |
|---|
| 428 | zdbtc_nodel(jk) = zdbtmc |
|---|
| 429 | ztdbtc_nodel(jk+1) = zdbtc_nodel(jk) * ztdbtc_nodel(jk) |
|---|
| 430 | |
|---|
| 431 | ! Clear + Cloud |
|---|
| 432 | tauorig = ztauc(jk) + ptaucorig(ikl,ibm) |
|---|
| 433 | ! zdbtmo = exp(-tauorig / prmu0) |
|---|
| 434 | |
|---|
| 435 | ! Use exponential lookup table for transmittance, or expansion of exponential for low tau |
|---|
| 436 | ze1 = tauorig / prmu0 |
|---|
| 437 | if (ze1 .le. od_lo) then |
|---|
| 438 | zdbtmo = 1._rb - ze1 + 0.5_rb * ze1 * ze1 |
|---|
| 439 | else |
|---|
| 440 | tblind = ze1 / (bpade + ze1) |
|---|
| 441 | itind = tblint * tblind + 0.5_rb |
|---|
| 442 | zdbtmo = exp_tbl(itind) |
|---|
| 443 | endif |
|---|
| 444 | |
|---|
| 445 | zdbt_nodel(jk) = zclear * zdbtmc + zcloud * zdbtmo |
|---|
| 446 | ztdbt_nodel(jk+1) = zdbt_nodel(jk) * ztdbt_nodel(jk) |
|---|
| 447 | |
|---|
| 448 | endif |
|---|
| 449 | ! /\/\/\ Above code only needed for unscaled direct beam calculation |
|---|
| 450 | |
|---|
| 451 | |
|---|
| 452 | ! Delta scaling - clear |
|---|
| 453 | zf = zgcc(jk) * zgcc(jk) |
|---|
| 454 | zwf = zomcc(jk) * zf |
|---|
| 455 | ztauc(jk) = (1.0_rb - zwf) * ztauc(jk) |
|---|
| 456 | zomcc(jk) = (zomcc(jk) - zwf) / (1.0_rb - zwf) |
|---|
| 457 | zgcc (jk) = (zgcc(jk) - zf) / (1.0_rb - zf) |
|---|
| 458 | |
|---|
| 459 | ! Total sky optical parameters (cloud properties already delta-scaled) |
|---|
| 460 | ! Use this code if cloud properties are derived in rrtmg_sw_cldprop |
|---|
| 461 | if (icpr .ge. 1) then |
|---|
| 462 | ztauo(jk) = ztauc(jk) + ptauc(ikl,ibm) |
|---|
| 463 | zomco(jk) = ztauc(jk) * zomcc(jk) + ptauc(ikl,ibm) * pomgc(ikl,ibm) |
|---|
| 464 | zgco (jk) = (ptauc(ikl,ibm) * pomgc(ikl,ibm) * pasyc(ikl,ibm) + & |
|---|
| 465 | ztauc(jk) * zomcc(jk) * zgcc(jk)) / zomco(jk) |
|---|
| 466 | zomco(jk) = zomco(jk) / ztauo(jk) |
|---|
| 467 | |
|---|
| 468 | ! Total sky optical parameters (if cloud properties not delta scaled) |
|---|
| 469 | ! Use this code if cloud properties are not derived in rrtmg_sw_cldprop |
|---|
| 470 | elseif (icpr .eq. 0) then |
|---|
| 471 | ztauo(jk) = ztaur(ikl,iw) + ztaug(ikl,iw) + ptaua(ikl,ibm) + ptauc(ikl,ibm) |
|---|
| 472 | zomco(jk) = ptaua(ikl,ibm) * pomga(ikl,ibm) + ptauc(ikl,ibm) * pomgc(ikl,ibm) + & |
|---|
| 473 | ztaur(ikl,iw) * 1.0_rb |
|---|
| 474 | zgco (jk) = (ptauc(ikl,ibm) * pomgc(ikl,ibm) * pasyc(ikl,ibm) + & |
|---|
| 475 | ptaua(ikl,ibm)*pomga(ikl,ibm)*pasya(ikl,ibm)) / zomco(jk) |
|---|
| 476 | zomco(jk) = zomco(jk) / ztauo(jk) |
|---|
| 477 | |
|---|
| 478 | ! Delta scaling - clouds |
|---|
| 479 | ! Use only if subroutine rrtmg_sw_cldprop is not used to get cloud properties and to apply delta scaling |
|---|
| 480 | zf = zgco(jk) * zgco(jk) |
|---|
| 481 | zwf = zomco(jk) * zf |
|---|
| 482 | ztauo(jk) = (1._rb - zwf) * ztauo(jk) |
|---|
| 483 | zomco(jk) = (zomco(jk) - zwf) / (1.0_rb - zwf) |
|---|
| 484 | zgco (jk) = (zgco(jk) - zf) / (1.0_rb - zf) |
|---|
| 485 | endif |
|---|
| 486 | |
|---|
| 487 | ! End of layer loop |
|---|
| 488 | enddo |
|---|
| 489 | |
|---|
| 490 | |
|---|
| 491 | ! Clear sky reflectivities |
|---|
| 492 | call reftra_sw (klev, & |
|---|
| 493 | lrtchkclr, zgcc, prmu0, ztauc, zomcc, & |
|---|
| 494 | zrefc, zrefdc, ztrac, ztradc) |
|---|
| 495 | |
|---|
| 496 | ! Total sky reflectivities |
|---|
| 497 | call reftra_sw (klev, & |
|---|
| 498 | lrtchkcld, zgco, prmu0, ztauo, zomco, & |
|---|
| 499 | zrefo, zrefdo, ztrao, ztrado) |
|---|
| 500 | |
|---|
| 501 | |
|---|
| 502 | do jk=1,klev |
|---|
| 503 | |
|---|
| 504 | ! Combine clear and cloudy contributions for total sky |
|---|
| 505 | ikl = klev+1-jk |
|---|
| 506 | zclear = 1.0_rb - pclfr(ikl) |
|---|
| 507 | zcloud = pclfr(ikl) |
|---|
| 508 | |
|---|
| 509 | zref(jk) = zclear*zrefc(jk) + zcloud*zrefo(jk) |
|---|
| 510 | zrefd(jk)= zclear*zrefdc(jk) + zcloud*zrefdo(jk) |
|---|
| 511 | ztra(jk) = zclear*ztrac(jk) + zcloud*ztrao(jk) |
|---|
| 512 | ztrad(jk)= zclear*ztradc(jk) + zcloud*ztrado(jk) |
|---|
| 513 | |
|---|
| 514 | ! Direct beam transmittance |
|---|
| 515 | |
|---|
| 516 | ! Clear |
|---|
| 517 | ! zdbtmc = exp(-ztauc(jk) / prmu0) |
|---|
| 518 | |
|---|
| 519 | ! Use exponential lookup table for transmittance, or expansion of |
|---|
| 520 | ! exponential for low tau |
|---|
| 521 | ze1 = ztauc(jk) / prmu0 |
|---|
| 522 | if (ze1 .le. od_lo) then |
|---|
| 523 | zdbtmc = 1._rb - ze1 + 0.5_rb * ze1 * ze1 |
|---|
| 524 | else |
|---|
| 525 | tblind = ze1 / (bpade + ze1) |
|---|
| 526 | itind = tblint * tblind + 0.5_rb |
|---|
| 527 | zdbtmc = exp_tbl(itind) |
|---|
| 528 | endif |
|---|
| 529 | |
|---|
| 530 | zdbtc(jk) = zdbtmc |
|---|
| 531 | ztdbtc(jk+1) = zdbtc(jk)*ztdbtc(jk) |
|---|
| 532 | |
|---|
| 533 | ! Clear + Cloud |
|---|
| 534 | ! zdbtmo = exp(-ztauo(jk) / prmu0) |
|---|
| 535 | |
|---|
| 536 | ! Use exponential lookup table for transmittance, or expansion of |
|---|
| 537 | ! exponential for low tau |
|---|
| 538 | ze1 = ztauo(jk) / prmu0 |
|---|
| 539 | if (ze1 .le. od_lo) then |
|---|
| 540 | zdbtmo = 1._rb - ze1 + 0.5_rb * ze1 * ze1 |
|---|
| 541 | else |
|---|
| 542 | tblind = ze1 / (bpade + ze1) |
|---|
| 543 | itind = tblint * tblind + 0.5_rb |
|---|
| 544 | zdbtmo = exp_tbl(itind) |
|---|
| 545 | endif |
|---|
| 546 | |
|---|
| 547 | zdbt(jk) = zclear*zdbtmc + zcloud*zdbtmo |
|---|
| 548 | ztdbt(jk+1) = zdbt(jk)*ztdbt(jk) |
|---|
| 549 | |
|---|
| 550 | enddo |
|---|
| 551 | |
|---|
| 552 | ! Vertical quadrature for clear-sky fluxes |
|---|
| 553 | |
|---|
| 554 | call vrtqdr_sw (klev, iw, & |
|---|
| 555 | zrefc, zrefdc, ztrac, ztradc, & |
|---|
| 556 | zdbtc, zrdndc, zrupc, zrupdc, ztdbtc, & |
|---|
| 557 | zcd, zcu) |
|---|
| 558 | |
|---|
| 559 | ! Vertical quadrature for cloudy fluxes |
|---|
| 560 | |
|---|
| 561 | call vrtqdr_sw (klev, iw, & |
|---|
| 562 | zref, zrefd, ztra, ztrad, & |
|---|
| 563 | zdbt, zrdnd, zrup, zrupd, ztdbt, & |
|---|
| 564 | zfd, zfu) |
|---|
| 565 | |
|---|
| 566 | ! Upwelling and downwelling fluxes at levels |
|---|
| 567 | ! Two-stream calculations go from top to bottom; |
|---|
| 568 | ! layer indexing is reversed to go bottom to top for output arrays |
|---|
| 569 | |
|---|
| 570 | do jk=1,klev+1 |
|---|
| 571 | ikl=klev+2-jk |
|---|
| 572 | |
|---|
| 573 | ! Accumulate spectral fluxes over bands - inactive |
|---|
| 574 | ! zbbfu(ikl) = zbbfu(ikl) + zincflx(iw)*zfu(jk,iw) |
|---|
| 575 | ! zbbfd(ikl) = zbbfd(ikl) + zincflx(iw)*zfd(jk,iw) |
|---|
| 576 | ! zbbcu(ikl) = zbbcu(ikl) + zincflx(iw)*zcu(jk,iw) |
|---|
| 577 | ! zbbcd(ikl) = zbbcd(ikl) + zincflx(iw)*zcd(jk,iw) |
|---|
| 578 | ! zbbfddir(ikl) = zbbfddir(ikl) + zincflx(iw)*ztdbt_nodel(jk) |
|---|
| 579 | ! zbbcddir(ikl) = zbbcddir(ikl) + zincflx(iw)*ztdbtc_nodel(jk) |
|---|
| 580 | |
|---|
| 581 | ! Accumulate spectral fluxes over whole spectrum |
|---|
| 582 | pbbfu(ikl) = pbbfu(ikl) + zincflx(iw)*zfu(jk,iw) |
|---|
| 583 | pbbfd(ikl) = pbbfd(ikl) + zincflx(iw)*zfd(jk,iw) |
|---|
| 584 | pbbcu(ikl) = pbbcu(ikl) + zincflx(iw)*zcu(jk,iw) |
|---|
| 585 | pbbcd(ikl) = pbbcd(ikl) + zincflx(iw)*zcd(jk,iw) |
|---|
| 586 | if (idelm .eq. 0) then |
|---|
| 587 | pbbfddir(ikl) = pbbfddir(ikl) + zincflx(iw)*ztdbt_nodel(jk) |
|---|
| 588 | pbbcddir(ikl) = pbbcddir(ikl) + zincflx(iw)*ztdbtc_nodel(jk) |
|---|
| 589 | elseif (idelm .eq. 1) then |
|---|
| 590 | pbbfddir(ikl) = pbbfddir(ikl) + zincflx(iw)*ztdbt(jk) |
|---|
| 591 | pbbcddir(ikl) = pbbcddir(ikl) + zincflx(iw)*ztdbtc(jk) |
|---|
| 592 | endif |
|---|
| 593 | |
|---|
| 594 | ! Accumulate direct fluxes for UV/visible bands |
|---|
| 595 | if (ibm >= 10 .and. ibm <= 13) then |
|---|
| 596 | puvcd(ikl) = puvcd(ikl) + zincflx(iw)*zcd(jk,iw) |
|---|
| 597 | puvfd(ikl) = puvfd(ikl) + zincflx(iw)*zfd(jk,iw) |
|---|
| 598 | if (idelm .eq. 0) then |
|---|
| 599 | puvfddir(ikl) = puvfddir(ikl) + zincflx(iw)*ztdbt_nodel(jk) |
|---|
| 600 | puvcddir(ikl) = puvcddir(ikl) + zincflx(iw)*ztdbtc_nodel(jk) |
|---|
| 601 | elseif (idelm .eq. 1) then |
|---|
| 602 | puvfddir(ikl) = puvfddir(ikl) + zincflx(iw)*ztdbt(jk) |
|---|
| 603 | puvcddir(ikl) = puvcddir(ikl) + zincflx(iw)*ztdbtc(jk) |
|---|
| 604 | endif |
|---|
| 605 | ! Accumulate direct fluxes for near-IR bands |
|---|
| 606 | else if (ibm == 14 .or. ibm <= 9) then |
|---|
| 607 | pnicd(ikl) = pnicd(ikl) + zincflx(iw)*zcd(jk,iw) |
|---|
| 608 | pnifd(ikl) = pnifd(ikl) + zincflx(iw)*zfd(jk,iw) |
|---|
| 609 | if (idelm .eq. 0) then |
|---|
| 610 | pnifddir(ikl) = pnifddir(ikl) + zincflx(iw)*ztdbt_nodel(jk) |
|---|
| 611 | pnicddir(ikl) = pnicddir(ikl) + zincflx(iw)*ztdbtc_nodel(jk) |
|---|
| 612 | elseif (idelm .eq. 1) then |
|---|
| 613 | pnifddir(ikl) = pnifddir(ikl) + zincflx(iw)*ztdbt(jk) |
|---|
| 614 | pnicddir(ikl) = pnicddir(ikl) + zincflx(iw)*ztdbtc(jk) |
|---|
| 615 | endif |
|---|
| 616 | endif |
|---|
| 617 | |
|---|
| 618 | enddo |
|---|
| 619 | |
|---|
| 620 | ! End loop on jg, g-point interval |
|---|
| 621 | enddo |
|---|
| 622 | |
|---|
| 623 | ! End loop on jb, spectral band |
|---|
| 624 | enddo |
|---|
| 625 | |
|---|
| 626 | end subroutine spcvrt_sw |
|---|
| 627 | |
|---|
| 628 | end module rrtmg_sw_spcvrt |
|---|
| 629 | |
|---|
| 630 | |
|---|
