| 1 | ! path: $Source$ |
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| 2 | ! author: $Author: miacono $ |
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| 3 | ! revision: $Revision: 23308 $ |
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| 4 | ! created: $Date: 2013-12-27 17:23:51 -0500 (Fri, 27 Dec 2013) $ |
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| 5 | ! |
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| 6 | |
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| 7 | module rrtmg_sw_rad |
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| 8 | |
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| 9 | ! -------------------------------------------------------------------------- |
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| 10 | ! | | |
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| 11 | ! | Copyright 2002-2009, Atmospheric & Environmental Research, Inc. (AER). | |
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| 12 | ! | This software may be used, copied, or redistributed as long as it is | |
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| 13 | ! | not sold and this copyright notice is reproduced on each copy made. | |
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| 14 | ! | This model is provided as is without any express or implied warranties. | |
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| 15 | ! | (http://www.rtweb.aer.com/) | |
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| 16 | ! | | |
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| 17 | ! -------------------------------------------------------------------------- |
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| 18 | ! |
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| 19 | ! **************************************************************************** |
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| 20 | ! * * |
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| 21 | ! * RRTMG_SW * |
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| 22 | ! * * |
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| 23 | ! * * |
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| 24 | ! * * |
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| 25 | ! * a rapid radiative transfer model * |
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| 26 | ! * for the solar spectral region * |
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| 27 | ! * for application to general circulation models * |
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| 28 | ! * * |
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| 29 | ! * * |
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| 30 | ! * Atmospheric and Environmental Research, Inc. * |
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| 31 | ! * 131 Hartwell Avenue * |
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| 32 | ! * Lexington, MA 02421 * |
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| 33 | ! * * |
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| 34 | ! * * |
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| 35 | ! * Eli J. Mlawer * |
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| 36 | ! * Jennifer S. Delamere * |
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| 37 | ! * Michael J. Iacono * |
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| 38 | ! * Shepard A. Clough * |
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| 39 | ! * * |
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| 40 | ! * * |
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| 41 | ! * * |
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| 42 | ! * * |
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| 43 | ! * * |
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| 44 | ! * * |
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| 45 | ! * email: emlawer@aer.com * |
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| 46 | ! * email: jdelamer@aer.com * |
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| 47 | ! * email: miacono@aer.com * |
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| 48 | ! * * |
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| 49 | ! * The authors wish to acknowledge the contributions of the * |
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| 50 | ! * following people: Steven J. Taubman, Patrick D. Brown, * |
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| 51 | ! * Ronald E. Farren, Luke Chen, Robert Bergstrom. * |
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| 52 | ! * * |
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| 53 | ! **************************************************************************** |
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| 54 | |
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| 55 | ! --------- Modules --------- |
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| 56 | use parkind, only : im => kind_im, rb => kind_rb |
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| 57 | use rrsw_vsn |
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| 58 | use rrtmg_sw_cldprop, only: cldprop_sw |
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| 59 | ! *** Move the required call to rrtmg_sw_ini below and the following |
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| 60 | ! use association to GCM initialization area *** |
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| 61 | ! use rrtmg_sw_init, only: rrtmg_sw_ini |
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| 62 | use rrtmg_sw_setcoef, only: setcoef_sw |
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| 63 | use rrtmg_sw_spcvrt, only: spcvrt_sw |
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| 64 | |
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| 65 | implicit none |
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| 66 | |
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| 67 | ! public interfaces/functions/subroutines |
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| 68 | public :: rrtmg_sw, inatm_sw, earth_sun |
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| 69 | |
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| 70 | !------------------------------------------------------------------ |
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| 71 | contains |
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| 72 | !------------------------------------------------------------------ |
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| 73 | |
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| 74 | !------------------------------------------------------------------ |
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| 75 | ! Public subroutines |
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| 76 | !------------------------------------------------------------------ |
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| 77 | |
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| 78 | subroutine rrtmg_sw & |
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| 79 | (ncol ,nlay ,icld ,iaer , & |
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| 80 | play ,plev ,tlay ,tlev ,tsfc , & |
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| 81 | h2ovmr ,o3vmr ,co2vmr ,ch4vmr ,n2ovmr ,o2vmr, & |
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| 82 | asdir ,asdif ,aldir ,aldif , & |
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| 83 | coszen ,adjes ,dyofyr ,scon , & |
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| 84 | inflgsw ,iceflgsw,liqflgsw,cldfr , & |
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| 85 | taucld ,ssacld ,asmcld ,fsfcld , & |
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| 86 | cicewp ,cliqwp ,reice ,reliq , & |
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| 87 | tauaer ,ssaaer ,asmaer ,ecaer , & |
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| 88 | swuflx ,swdflx ,swhr ,swuflxc ,swdflxc ,swhrc) |
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| 89 | |
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| 90 | ! ------- Description ------- |
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| 91 | |
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| 92 | ! This program is the driver for RRTMG_SW, the AER SW radiation model for |
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| 93 | ! application to GCMs, that has been adapted from RRTM_SW for improved |
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| 94 | ! efficiency and to provide fractional cloudiness and cloud overlap |
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| 95 | ! capability using McICA. |
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| 96 | ! |
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| 97 | ! Note: The call to RRTMG_SW_INI should be moved to the GCM initialization |
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| 98 | ! area, since this has to be called only once. |
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| 99 | ! |
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| 100 | ! This routine |
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| 101 | ! b) calls INATM_SW to read in the atmospheric profile from GCM; |
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| 102 | ! all layering in RRTMG is ordered from surface to toa. |
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| 103 | ! c) calls CLDPROP_SW to set cloud optical depth based on input |
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| 104 | ! cloud properties |
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| 105 | ! d) calls SETCOEF_SW to calculate various quantities needed for |
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| 106 | ! the radiative transfer algorithm |
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| 107 | ! e) calls SPCVRT to call the two-stream model that in turn |
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| 108 | ! calls TAUMOL to calculate gaseous optical depths for each |
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| 109 | ! of the 16 spectral bands and to perform the radiative transfer; |
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| 110 | ! f) passes the calculated fluxes and cooling rates back to GCM |
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| 111 | ! |
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| 112 | ! Two modes of operation are possible: |
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| 113 | ! The mode is chosen by using either rrtmg_sw.nomcica.f90 (to not use |
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| 114 | ! McICA) or rrtmg_sw.f90 (to use McICA) to interface with a GCM. |
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| 115 | ! |
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| 116 | ! 1) Standard, single forward model calculation (imca = 0); this is |
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| 117 | ! valid only for clear sky or fully overcast clouds |
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| 118 | ! 2) Monte Carlo Independent Column Approximation (McICA, Pincus et al., |
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| 119 | ! JC, 2003) method is applied to the forward model calculation (imca = 1) |
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| 120 | ! This method is valid for clear sky and full or partial cloud conditions. |
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| 121 | ! |
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| 122 | ! Two methods of cloud property input are possible: |
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| 123 | ! Cloud properties can be input in one of two ways (controlled by input |
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| 124 | ! flags inflag, iceflag and liqflag; see text file rrtmg_sw_instructions |
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| 125 | ! and subroutine rrtmg_sw_cldprop.f90 for further details): |
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| 126 | ! |
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| 127 | ! 1) Input cloud fraction, cloud optical depth, single scattering albedo |
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| 128 | ! and asymmetry parameter directly (inflgsw = 0) |
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| 129 | ! 2) Input cloud fraction and cloud physical properties: ice fracion, |
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| 130 | ! ice and liquid particle sizes (inflgsw = 1 or 2); |
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| 131 | ! cloud optical properties are calculated by cldprop or cldprmc based |
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| 132 | ! on input settings of iceflgsw and liqflgsw |
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| 133 | ! |
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| 134 | ! Two methods of aerosol property input are possible: |
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| 135 | ! Aerosol properties can be input in one of two ways (controlled by input |
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| 136 | ! flag iaer, see text file rrtmg_sw_instructions for further details): |
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| 137 | ! |
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| 138 | ! 1) Input aerosol optical depth, single scattering albedo and asymmetry |
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| 139 | ! parameter directly by layer and spectral band (iaer=10) |
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| 140 | ! 2) Input aerosol optical depth and 0.55 micron directly by layer and use |
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| 141 | ! one or more of six ECMWF aerosol types (iaer=6) |
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| 142 | ! |
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| 143 | ! |
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| 144 | ! ------- Modifications ------- |
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| 145 | ! |
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| 146 | ! This version of RRTMG_SW has been modified from RRTM_SW to use a reduced |
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| 147 | ! set of g-point intervals and a two-stream model for application to GCMs. |
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| 148 | ! |
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| 149 | !-- Original version (derived from RRTM_SW) |
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| 150 | ! 2002: AER. Inc. |
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| 151 | !-- Conversion to F90 formatting; addition of 2-stream radiative transfer |
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| 152 | ! Feb 2003: J.-J. Morcrette, ECMWF |
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| 153 | !-- Additional modifications for GCM application |
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| 154 | ! Aug 2003: M. J. Iacono, AER Inc. |
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| 155 | !-- Total number of g-points reduced from 224 to 112. Original |
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| 156 | ! set of 224 can be restored by exchanging code in module parrrsw.f90 |
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| 157 | ! and in file rrtmg_sw_init.f90. |
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| 158 | ! Apr 2004: M. J. Iacono, AER, Inc. |
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| 159 | !-- Modifications to include output for direct and diffuse |
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| 160 | ! downward fluxes. There are output as "true" fluxes without |
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| 161 | ! any delta scaling applied. Code can be commented to exclude |
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| 162 | ! this calculation in source file rrtmg_sw_spcvrt.f90. |
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| 163 | ! Jan 2005: E. J. Mlawer, M. J. Iacono, AER, Inc. |
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| 164 | !-- Reformatted for consistency with rrtmg_lw. |
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| 165 | ! Feb 2007: M. J. Iacono, AER, Inc. |
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| 166 | !-- Modifications to formatting to use assumed-shape arrays. |
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| 167 | ! Aug 2007: M. J. Iacono, AER, Inc. |
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| 168 | !-- Modified to output direct and diffuse fluxes either with or without |
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| 169 | ! delta scaling based on setting of idelm flag. |
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| 170 | ! Dec 2008: M. J. Iacono, AER, Inc. |
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| 171 | |
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| 172 | ! --------- Modules --------- |
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| 173 | |
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| 174 | use parrrsw, only : nbndsw, ngptsw, naerec, nstr, nmol, mxmol, & |
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| 175 | jpband, jpb1, jpb2 |
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| 176 | use rrsw_aer, only : rsrtaua, rsrpiza, rsrasya |
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| 177 | use rrsw_con, only : heatfac, oneminus, pi |
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| 178 | use rrsw_wvn, only : wavenum1, wavenum2 |
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| 179 | |
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| 180 | ! ------- Declarations |
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| 181 | |
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| 182 | ! ----- Input ----- |
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| 183 | ! Note: All volume mixing ratios are in dimensionless units of mole fraction obtained |
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| 184 | ! by scaling mass mixing ratio (g/g) with the appropriate molecular weights (g/mol) |
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| 185 | integer(kind=im), intent(in) :: ncol ! Number of horizontal columns |
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| 186 | integer(kind=im), intent(in) :: nlay ! Number of model layers |
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| 187 | integer(kind=im), intent(inout) :: icld ! Cloud overlap method |
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| 188 | ! 0: Clear only |
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| 189 | ! 1: Random |
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| 190 | ! 2: Maximum/random |
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| 191 | ! 3: Maximum |
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| 192 | integer(kind=im), intent(inout) :: iaer ! Aerosol option flag |
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| 193 | ! 0: No aerosol |
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| 194 | ! 6: ECMWF method |
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| 195 | ! 10:Input aerosol optical |
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| 196 | ! properties |
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| 197 | |
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| 198 | real(kind=rb), intent(in) :: play(:,:) ! Layer pressures (hPa, mb) |
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| 199 | ! Dimensions: (ncol,nlay) |
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| 200 | real(kind=rb), intent(in) :: plev(:,:) ! Interface pressures (hPa, mb) |
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| 201 | ! Dimensions: (ncol,nlay+1) |
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| 202 | real(kind=rb), intent(in) :: tlay(:,:) ! Layer temperatures (K) |
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| 203 | ! Dimensions: (ncol,nlay) |
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| 204 | real(kind=rb), intent(in) :: tlev(:,:) ! Interface temperatures (K) |
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| 205 | ! Dimensions: (ncol,nlay+1) |
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| 206 | real(kind=rb), intent(in) :: tsfc(:) ! Surface temperature (K) |
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| 207 | ! Dimensions: (ncol) |
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| 208 | real(kind=rb), intent(in) :: h2ovmr(:,:) ! H2O volume mixing ratio |
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| 209 | ! Dimensions: (ncol,nlay) |
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| 210 | real(kind=rb), intent(in) :: o3vmr(:,:) ! O3 volume mixing ratio |
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| 211 | ! Dimensions: (ncol,nlay) |
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| 212 | real(kind=rb), intent(in) :: co2vmr(:,:) ! CO2 volume mixing ratio |
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| 213 | ! Dimensions: (ncol,nlay) |
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| 214 | real(kind=rb), intent(in) :: ch4vmr(:,:) ! Methane volume mixing ratio |
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| 215 | ! Dimensions: (ncol,nlay) |
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| 216 | real(kind=rb), intent(in) :: n2ovmr(:,:) ! Nitrous oxide volume mixing ratio |
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| 217 | ! Dimensions: (ncol,nlay) |
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| 218 | real(kind=rb), intent(in) :: o2vmr(:,:) ! Oxygen volume mixing ratio |
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| 219 | ! Dimensions: (ncol,nlay) |
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| 220 | real(kind=rb), intent(in) :: asdir(:) ! UV/vis surface albedo direct rad |
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| 221 | ! Dimensions: (ncol) |
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| 222 | real(kind=rb), intent(in) :: aldir(:) ! Near-IR surface albedo direct rad |
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| 223 | ! Dimensions: (ncol) |
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| 224 | real(kind=rb), intent(in) :: asdif(:) ! UV/vis surface albedo: diffuse rad |
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| 225 | ! Dimensions: (ncol) |
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| 226 | real(kind=rb), intent(in) :: aldif(:) ! Near-IR surface albedo: diffuse rad |
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| 227 | ! Dimensions: (ncol) |
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| 228 | |
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| 229 | integer(kind=im), intent(in) :: dyofyr ! Day of the year (used to get Earth/Sun |
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| 230 | ! distance if adjflx not provided) |
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| 231 | real(kind=rb), intent(in) :: adjes ! Flux adjustment for Earth/Sun distance |
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| 232 | real(kind=rb), intent(in) :: coszen(:) ! Cosine of solar zenith angle |
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| 233 | ! Dimensions: (ncol) |
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| 234 | real(kind=rb), intent(in) :: scon ! Solar constant (W/m2) |
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| 235 | |
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| 236 | integer(kind=im), intent(in) :: inflgsw ! Flag for cloud optical properties |
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| 237 | integer(kind=im), intent(in) :: iceflgsw ! Flag for ice particle specification |
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| 238 | integer(kind=im), intent(in) :: liqflgsw ! Flag for liquid droplet specification |
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| 239 | |
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| 240 | real(kind=rb), intent(in) :: cldfr(:,:) ! Cloud fraction |
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| 241 | ! Dimensions: (ncol,nlay) |
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| 242 | real(kind=rb), intent(in) :: taucld(:,:,:) ! In-cloud optical depth |
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| 243 | ! Dimensions: (nbndsw,ncol,nlay) |
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| 244 | real(kind=rb), intent(in) :: ssacld(:,:,:) ! In-cloud single scattering albedo |
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| 245 | ! Dimensions: (nbndsw,ncol,nlay) |
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| 246 | real(kind=rb), intent(in) :: asmcld(:,:,:) ! In-cloud asymmetry parameter |
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| 247 | ! Dimensions: (nbndsw,ncol,nlay) |
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| 248 | real(kind=rb), intent(in) :: fsfcld(:,:,:) ! In-cloud forward scattering fraction |
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| 249 | ! Dimensions: (nbndsw,ncol,nlay) |
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| 250 | real(kind=rb), intent(in) :: cicewp(:,:) ! In-cloud ice water path (g/m2) |
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| 251 | ! Dimensions: (ncol,nlay) |
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| 252 | real(kind=rb), intent(in) :: cliqwp(:,:) ! In-cloud liquid water path (g/m2) |
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| 253 | ! Dimensions: (ncol,nlay) |
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| 254 | real(kind=rb), intent(in) :: reice(:,:) ! Cloud ice effective radius (microns) |
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| 255 | ! Dimensions: (ncol,nlay) |
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| 256 | ! specific definition of reice depends on setting of iceflgsw: |
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| 257 | ! iceflgsw = 0: (inactive) |
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| 258 | ! |
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| 259 | ! iceflgsw = 1: ice effective radius, r_ec, (Ebert and Curry, 1992), |
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| 260 | ! r_ec range is limited to 13.0 to 130.0 microns |
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| 261 | ! iceflgsw = 2: ice effective radius, r_k, (Key, Streamer Ref. Manual, 1996) |
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| 262 | ! r_k range is limited to 5.0 to 131.0 microns |
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| 263 | ! iceflgsw = 3: generalized effective size, dge, (Fu, 1996), |
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| 264 | ! dge range is limited to 5.0 to 140.0 microns |
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| 265 | ! [dge = 1.0315 * r_ec] |
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| 266 | real(kind=rb), intent(in) :: reliq(:,:) ! Cloud water drop effective radius (microns) |
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| 267 | ! Dimensions: (ncol,nlay) |
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| 268 | real(kind=rb), intent(in) :: tauaer(:,:,:) ! Aerosol optical depth (iaer=10 only) |
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| 269 | ! Dimensions: (ncol,nlay,nbndsw) |
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| 270 | ! (non-delta scaled) |
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| 271 | real(kind=rb), intent(in) :: ssaaer(:,:,:) ! Aerosol single scattering albedo (iaer=10 only) |
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| 272 | ! Dimensions: (ncol,nlay,nbndsw) |
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| 273 | ! (non-delta scaled) |
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| 274 | real(kind=rb), intent(in) :: asmaer(:,:,:) ! Aerosol asymmetry parameter (iaer=10 only) |
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| 275 | ! Dimensions: (ncol,nlay,nbndsw) |
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| 276 | ! (non-delta scaled) |
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| 277 | real(kind=rb), intent(in) :: ecaer(:,:,:) ! Aerosol optical depth at 0.55 micron (iaer=6 only) |
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| 278 | ! Dimensions: (ncol,nlay,naerec) |
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| 279 | ! (non-delta scaled) |
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| 280 | |
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| 281 | ! ----- Output ----- |
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| 282 | |
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| 283 | real(kind=rb), intent(out) :: swuflx(:,:) ! Total sky shortwave upward flux (W/m2) |
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| 284 | ! Dimensions: (ncol,nlay+1) |
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| 285 | real(kind=rb), intent(out) :: swdflx(:,:) ! Total sky shortwave downward flux (W/m2) |
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| 286 | ! Dimensions: (ncol,nlay+1) |
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| 287 | real(kind=rb), intent(out) :: swhr(:,:) ! Total sky shortwave radiative heating rate (K/d) |
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| 288 | ! Dimensions: (ncol,nlay) |
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| 289 | real(kind=rb), intent(out) :: swuflxc(:,:) ! Clear sky shortwave upward flux (W/m2) |
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| 290 | ! Dimensions: (ncol,nlay+1) |
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| 291 | real(kind=rb), intent(out) :: swdflxc(:,:) ! Clear sky shortwave downward flux (W/m2) |
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| 292 | ! Dimensions: (ncol,nlay+1) |
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| 293 | real(kind=rb), intent(out) :: swhrc(:,:) ! Clear sky shortwave radiative heating rate (K/d) |
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| 294 | ! Dimensions: (ncol,nlay) |
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| 295 | |
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| 296 | ! ----- Local ----- |
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| 297 | |
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| 298 | ! Control |
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| 299 | integer(kind=im) :: nlayers ! total number of layers |
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| 300 | integer(kind=im) :: istart ! beginning band of calculation |
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| 301 | integer(kind=im) :: iend ! ending band of calculation |
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| 302 | integer(kind=im) :: icpr ! cldprop/cldprmc use flag |
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| 303 | integer(kind=im) :: iout ! output option flag |
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| 304 | integer(kind=im) :: idelm ! delta-m scaling flag |
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| 305 | ! [0 = direct and diffuse fluxes are unscaled] |
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| 306 | ! [1 = direct and diffuse fluxes are scaled] |
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| 307 | ! (total downward fluxes are always delta scaled) |
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| 308 | integer(kind=im) :: isccos ! instrumental cosine response flag (inactive) |
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| 309 | integer(kind=im) :: iplon ! column loop index |
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| 310 | integer(kind=im) :: i ! layer loop index ! jk |
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| 311 | integer(kind=im) :: ib ! band loop index ! jsw |
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| 312 | integer(kind=im) :: ia, ig ! indices |
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| 313 | integer(kind=im) :: k ! layer loop index |
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| 314 | integer(kind=im) :: ims ! value for changing mcica permute seed |
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| 315 | integer(kind=im) :: imca ! flag for mcica [0=off, 1=on] |
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| 316 | |
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| 317 | real(kind=rb) :: zepsec, zepzen ! epsilon |
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| 318 | real(kind=rb) :: zdpgcp ! flux to heating conversion ratio |
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| 319 | |
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| 320 | ! Atmosphere |
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| 321 | real(kind=rb) :: pavel(nlay+1) ! layer pressures (mb) |
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| 322 | real(kind=rb) :: tavel(nlay+1) ! layer temperatures (K) |
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| 323 | real(kind=rb) :: pz(0:nlay+1) ! level (interface) pressures (hPa, mb) |
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| 324 | real(kind=rb) :: tz(0:nlay+1) ! level (interface) temperatures (K) |
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| 325 | real(kind=rb) :: tbound ! surface temperature (K) |
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| 326 | real(kind=rb) :: pdp(nlay+1) ! layer pressure thickness (hPa, mb) |
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| 327 | real(kind=rb) :: coldry(nlay+1) ! dry air column amount |
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| 328 | real(kind=rb) :: wkl(mxmol,nlay+1) ! molecular amounts (mol/cm-2) |
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| 329 | |
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| 330 | ! real(kind=rb) :: earth_sun ! function for Earth/Sun distance factor |
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| 331 | real(kind=rb) :: cossza ! Cosine of solar zenith angle |
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| 332 | real(kind=rb) :: adjflux(jpband) ! adjustment for current Earth/Sun distance |
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| 333 | real(kind=rb) :: solvar(jpband) ! solar constant scaling factor from rrtmg_sw |
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| 334 | ! default value of 1368.22 Wm-2 at 1 AU |
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| 335 | real(kind=rb) :: albdir(nbndsw) ! surface albedo, direct ! zalbp |
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| 336 | real(kind=rb) :: albdif(nbndsw) ! surface albedo, diffuse ! zalbd |
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| 337 | |
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| 338 | real(kind=rb) :: taua(nlay+1,nbndsw) ! Aerosol optical depth |
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| 339 | real(kind=rb) :: ssaa(nlay+1,nbndsw) ! Aerosol single scattering albedo |
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| 340 | real(kind=rb) :: asma(nlay+1,nbndsw) ! Aerosol asymmetry parameter |
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| 341 | |
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| 342 | ! Atmosphere - setcoef |
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| 343 | integer(kind=im) :: laytrop ! tropopause layer index |
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| 344 | integer(kind=im) :: layswtch ! tropopause layer index |
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| 345 | integer(kind=im) :: laylow ! tropopause layer index |
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| 346 | integer(kind=im) :: jp(nlay+1) ! |
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| 347 | integer(kind=im) :: jt(nlay+1) ! |
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| 348 | integer(kind=im) :: jt1(nlay+1) ! |
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| 349 | |
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| 350 | real(kind=rb) :: colh2o(nlay+1) ! column amount (h2o) |
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| 351 | real(kind=rb) :: colco2(nlay+1) ! column amount (co2) |
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| 352 | real(kind=rb) :: colo3(nlay+1) ! column amount (o3) |
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| 353 | real(kind=rb) :: coln2o(nlay+1) ! column amount (n2o) |
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| 354 | real(kind=rb) :: colch4(nlay+1) ! column amount (ch4) |
|---|
| 355 | real(kind=rb) :: colo2(nlay+1) ! column amount (o2) |
|---|
| 356 | real(kind=rb) :: colmol(nlay+1) ! column amount |
|---|
| 357 | real(kind=rb) :: co2mult(nlay+1) ! column amount |
|---|
| 358 | |
|---|
| 359 | integer(kind=im) :: indself(nlay+1) |
|---|
| 360 | integer(kind=im) :: indfor(nlay+1) |
|---|
| 361 | real(kind=rb) :: selffac(nlay+1) |
|---|
| 362 | real(kind=rb) :: selffrac(nlay+1) |
|---|
| 363 | real(kind=rb) :: forfac(nlay+1) |
|---|
| 364 | real(kind=rb) :: forfrac(nlay+1) |
|---|
| 365 | |
|---|
| 366 | real(kind=rb) :: & ! |
|---|
| 367 | fac00(nlay+1), fac01(nlay+1), & |
|---|
| 368 | fac10(nlay+1), fac11(nlay+1) |
|---|
| 369 | |
|---|
| 370 | ! Atmosphere/clouds - cldprop |
|---|
| 371 | integer(kind=im) :: ncbands ! number of cloud spectral bands |
|---|
| 372 | integer(kind=im) :: inflag ! flag for cloud property method |
|---|
| 373 | integer(kind=im) :: iceflag ! flag for ice cloud properties |
|---|
| 374 | integer(kind=im) :: liqflag ! flag for liquid cloud properties |
|---|
| 375 | |
|---|
| 376 | real(kind=rb) :: cldfrac(nlay+1) ! layer cloud fraction |
|---|
| 377 | real(kind=rb) :: tauc(nbndsw,nlay+1) ! in-cloud optical depth (non-delta scaled) |
|---|
| 378 | real(kind=rb) :: ssac(nbndsw,nlay+1) ! in-cloud single scattering albedo (non-delta scaled) |
|---|
| 379 | real(kind=rb) :: asmc(nbndsw,nlay+1) ! in-cloud asymmetry parameter (non-delta scaled) |
|---|
| 380 | real(kind=rb) :: fsfc(nbndsw,nlay+1) ! in-cloud forward scattering fraction (non-delta scaled) |
|---|
| 381 | real(kind=rb) :: ciwp(nlay+1) ! in-cloud ice water path |
|---|
| 382 | real(kind=rb) :: clwp(nlay+1) ! in-cloud liquid water path |
|---|
| 383 | real(kind=rb) :: rel(nlay+1) ! cloud liquid particle effective radius (microns) |
|---|
| 384 | real(kind=rb) :: rei(nlay+1) ! cloud ice particle effective size (microns) |
|---|
| 385 | |
|---|
| 386 | real(kind=rb) :: taucloud(nlay+1,jpband) ! in-cloud optical depth |
|---|
| 387 | real(kind=rb) :: taucldorig(nlay+1,jpband)! in-cloud optical depth (non-delta scaled) |
|---|
| 388 | real(kind=rb) :: ssacloud(nlay+1,jpband) ! in-cloud single scattering albedo |
|---|
| 389 | real(kind=rb) :: asmcloud(nlay+1,jpband) ! in-cloud asymmetry parameter |
|---|
| 390 | |
|---|
| 391 | ! Atmosphere/clouds/aerosol - spcvrt,spcvmc |
|---|
| 392 | real(kind=rb) :: ztauc(nlay+1,nbndsw) ! cloud optical depth |
|---|
| 393 | real(kind=rb) :: ztaucorig(nlay+1,nbndsw) ! unscaled cloud optical depth |
|---|
| 394 | real(kind=rb) :: zasyc(nlay+1,nbndsw) ! cloud asymmetry parameter |
|---|
| 395 | ! (first moment of phase function) |
|---|
| 396 | real(kind=rb) :: zomgc(nlay+1,nbndsw) ! cloud single scattering albedo |
|---|
| 397 | real(kind=rb) :: ztaua(nlay+1,nbndsw) ! total aerosol optical depth |
|---|
| 398 | real(kind=rb) :: zasya(nlay+1,nbndsw) ! total aerosol asymmetry parameter |
|---|
| 399 | real(kind=rb) :: zomga(nlay+1,nbndsw) ! total aerosol single scattering albedo |
|---|
| 400 | |
|---|
| 401 | real(kind=rb) :: zbbfu(nlay+2) ! temporary upward shortwave flux (w/m2) |
|---|
| 402 | real(kind=rb) :: zbbfd(nlay+2) ! temporary downward shortwave flux (w/m2) |
|---|
| 403 | real(kind=rb) :: zbbcu(nlay+2) ! temporary clear sky upward shortwave flux (w/m2) |
|---|
| 404 | real(kind=rb) :: zbbcd(nlay+2) ! temporary clear sky downward shortwave flux (w/m2) |
|---|
| 405 | real(kind=rb) :: zbbfddir(nlay+2) ! temporary downward direct shortwave flux (w/m2) |
|---|
| 406 | real(kind=rb) :: zbbcddir(nlay+2) ! temporary clear sky downward direct shortwave flux (w/m2) |
|---|
| 407 | real(kind=rb) :: zuvfd(nlay+2) ! temporary UV downward shortwave flux (w/m2) |
|---|
| 408 | real(kind=rb) :: zuvcd(nlay+2) ! temporary clear sky UV downward shortwave flux (w/m2) |
|---|
| 409 | real(kind=rb) :: zuvfddir(nlay+2) ! temporary UV downward direct shortwave flux (w/m2) |
|---|
| 410 | real(kind=rb) :: zuvcddir(nlay+2) ! temporary clear sky UV downward direct shortwave flux (w/m2) |
|---|
| 411 | real(kind=rb) :: znifd(nlay+2) ! temporary near-IR downward shortwave flux (w/m2) |
|---|
| 412 | real(kind=rb) :: znicd(nlay+2) ! temporary clear sky near-IR downward shortwave flux (w/m2) |
|---|
| 413 | real(kind=rb) :: znifddir(nlay+2) ! temporary near-IR downward direct shortwave flux (w/m2) |
|---|
| 414 | real(kind=rb) :: znicddir(nlay+2) ! temporary clear sky near-IR downward direct shortwave flux (w/m2) |
|---|
| 415 | |
|---|
| 416 | ! Optional output fields |
|---|
| 417 | real(kind=rb) :: swnflx(nlay+2) ! Total sky shortwave net flux (W/m2) |
|---|
| 418 | real(kind=rb) :: swnflxc(nlay+2) ! Clear sky shortwave net flux (W/m2) |
|---|
| 419 | real(kind=rb) :: dirdflux(nlay+2) ! Direct downward shortwave surface flux |
|---|
| 420 | real(kind=rb) :: difdflux(nlay+2) ! Diffuse downward shortwave surface flux |
|---|
| 421 | real(kind=rb) :: uvdflx(nlay+2) ! Total sky downward shortwave flux, UV/vis |
|---|
| 422 | real(kind=rb) :: nidflx(nlay+2) ! Total sky downward shortwave flux, near-IR |
|---|
| 423 | real(kind=rb) :: dirdnuv(nlay+2) ! Direct downward shortwave flux, UV/vis |
|---|
| 424 | real(kind=rb) :: difdnuv(nlay+2) ! Diffuse downward shortwave flux, UV/vis |
|---|
| 425 | real(kind=rb) :: dirdnir(nlay+2) ! Direct downward shortwave flux, near-IR |
|---|
| 426 | real(kind=rb) :: difdnir(nlay+2) ! Diffuse downward shortwave flux, near-IR |
|---|
| 427 | |
|---|
| 428 | ! Output - inactive |
|---|
| 429 | ! real(kind=rb) :: zuvfu(nlay+2) ! temporary upward UV shortwave flux (w/m2) |
|---|
| 430 | ! real(kind=rb) :: zuvfd(nlay+2) ! temporary downward UV shortwave flux (w/m2) |
|---|
| 431 | ! real(kind=rb) :: zuvcu(nlay+2) ! temporary clear sky upward UV shortwave flux (w/m2) |
|---|
| 432 | ! real(kind=rb) :: zuvcd(nlay+2) ! temporary clear sky downward UV shortwave flux (w/m2) |
|---|
| 433 | ! real(kind=rb) :: zvsfu(nlay+2) ! temporary upward visible shortwave flux (w/m2) |
|---|
| 434 | ! real(kind=rb) :: zvsfd(nlay+2) ! temporary downward visible shortwave flux (w/m2) |
|---|
| 435 | ! real(kind=rb) :: zvscu(nlay+2) ! temporary clear sky upward visible shortwave flux (w/m2) |
|---|
| 436 | ! real(kind=rb) :: zvscd(nlay+2) ! temporary clear sky downward visible shortwave flux (w/m2) |
|---|
| 437 | ! real(kind=rb) :: znifu(nlay+2) ! temporary upward near-IR shortwave flux (w/m2) |
|---|
| 438 | ! real(kind=rb) :: znifd(nlay+2) ! temporary downward near-IR shortwave flux (w/m2) |
|---|
| 439 | ! real(kind=rb) :: znicu(nlay+2) ! temporary clear sky upward near-IR shortwave flux (w/m2) |
|---|
| 440 | ! real(kind=rb) :: znicd(nlay+2) ! temporary clear sky downward near-IR shortwave flux (w/m2) |
|---|
| 441 | |
|---|
| 442 | |
|---|
| 443 | ! Initializations |
|---|
| 444 | |
|---|
| 445 | zepsec = 1.e-06_rb |
|---|
| 446 | zepzen = 1.e-10_rb |
|---|
| 447 | oneminus = 1.0_rb - zepsec |
|---|
| 448 | pi = 2._rb * asin(1._rb) |
|---|
| 449 | |
|---|
| 450 | istart = jpb1 |
|---|
| 451 | iend = jpb2 |
|---|
| 452 | iout = 0 |
|---|
| 453 | icpr = 0 |
|---|
| 454 | |
|---|
| 455 | ! In a GCM with or without McICA, set nlon to the longitude dimension |
|---|
| 456 | ! |
|---|
| 457 | ! Set imca to select calculation type: |
|---|
| 458 | ! imca = 0, use standard forward model calculation (clear and overcast only) |
|---|
| 459 | ! imca = 1, use McICA for Monte Carlo treatment of sub-grid cloud variability |
|---|
| 460 | ! (clear, overcast or partial cloud conditions) |
|---|
| 461 | |
|---|
| 462 | ! *** This version does not use McICA (imca = 0) *** |
|---|
| 463 | |
|---|
| 464 | ! Set icld to select of clear or cloud calculation and cloud |
|---|
| 465 | ! overlap method (read by subroutine readprof from input file INPUT_RRTM): |
|---|
| 466 | ! Without McICA, SW calculation is limited to clear or fully overcast conditions. |
|---|
| 467 | ! icld = 0, clear only |
|---|
| 468 | ! icld = 1, with clouds using random cloud overlap (McICA only) |
|---|
| 469 | ! icld = 2, with clouds using maximum/random cloud overlap (McICA only) |
|---|
| 470 | ! icld = 3, with clouds using maximum cloud overlap (McICA only) |
|---|
| 471 | if (icld.lt.0.or.icld.gt.3) icld = 2 |
|---|
| 472 | |
|---|
| 473 | ! Set iaer to select aerosol option |
|---|
| 474 | ! iaer = 0, no aerosols |
|---|
| 475 | ! iaer = 6, use six ECMWF aerosol types |
|---|
| 476 | ! input aerosol optical depth at 0.55 microns for each aerosol type (ecaer) |
|---|
| 477 | ! iaer = 10, input total aerosol optical depth, single scattering albedo |
|---|
| 478 | ! and asymmetry parameter (tauaer, ssaaer, asmaer) directly |
|---|
| 479 | if (iaer.ne.0.and.iaer.ne.6.and.iaer.ne.10) iaer = 0 |
|---|
| 480 | |
|---|
| 481 | ! Set idelm to select between delta-M scaled or unscaled output direct and diffuse fluxes |
|---|
| 482 | ! NOTE: total downward fluxes are always delta scaled |
|---|
| 483 | ! idelm = 0, output direct and diffuse flux components are not delta scaled |
|---|
| 484 | ! (direct flux does not include forward scattering peak) |
|---|
| 485 | ! idelm = 1, output direct and diffuse flux components are delta scaled (default) |
|---|
| 486 | ! (direct flux includes part or most of forward scattering peak) |
|---|
| 487 | idelm = 1 |
|---|
| 488 | |
|---|
| 489 | ! Call model and data initialization, compute lookup tables, perform |
|---|
| 490 | ! reduction of g-points from 224 to 112 for input absorption |
|---|
| 491 | ! coefficient data and other arrays. |
|---|
| 492 | ! |
|---|
| 493 | ! In a GCM this call should be placed in the model initialization |
|---|
| 494 | ! area, since this has to be called only once. |
|---|
| 495 | ! call rrtmg_sw_ini(cpdair) |
|---|
| 496 | |
|---|
| 497 | ! This is the main longitude/column loop in RRTMG. |
|---|
| 498 | ! Modify to loop over all columns (nlon) or over daylight columns |
|---|
| 499 | |
|---|
| 500 | do iplon = 1, ncol |
|---|
| 501 | |
|---|
| 502 | ! Prepare atmosphere profile from GCM for use in RRTMG, and define |
|---|
| 503 | ! other input parameters |
|---|
| 504 | |
|---|
| 505 | call inatm_sw (iplon, nlay, icld, iaer, & |
|---|
| 506 | play, plev, tlay, tlev, tsfc, h2ovmr, & |
|---|
| 507 | o3vmr, co2vmr, ch4vmr, n2ovmr, o2vmr, & |
|---|
| 508 | adjes, dyofyr, scon, inflgsw, iceflgsw, liqflgsw, & |
|---|
| 509 | cldfr, taucld, ssacld, asmcld, fsfcld, cicewp, cliqwp, & |
|---|
| 510 | reice, reliq, tauaer, ssaaer, asmaer, & |
|---|
| 511 | nlayers, pavel, pz, pdp, tavel, tz, tbound, coldry, wkl, & |
|---|
| 512 | adjflux, solvar, inflag, iceflag, liqflag, cldfrac, tauc, & |
|---|
| 513 | ssac, asmc, fsfc, ciwp, clwp, rei, rel, taua, ssaa, asma) |
|---|
| 514 | |
|---|
| 515 | ! For cloudy atmosphere, use cldprop to set cloud optical properties based on |
|---|
| 516 | ! input cloud physical properties. Select method based on choices described |
|---|
| 517 | ! in cldprop. Cloud fraction, water path, liquid droplet and ice particle |
|---|
| 518 | ! effective radius must be passed in cldprop. Cloud fraction and cloud |
|---|
| 519 | ! optical properties are transferred to rrtmg_sw arrays in cldprop. |
|---|
| 520 | |
|---|
| 521 | ! Without McICA, SW calculation is limited to clear or fully overcast conditions. |
|---|
| 522 | ! Stop model if partial cloudiness is present. |
|---|
| 523 | |
|---|
| 524 | do i = 1, nlayers |
|---|
| 525 | if (cldfrac(i).gt.zepsec .and. cldfrac(i).lt.oneminus) then |
|---|
| 526 | stop 'PARTIAL CLOUD NOT ALLOWED' |
|---|
| 527 | endif |
|---|
| 528 | enddo |
|---|
| 529 | call cldprop_sw(nlayers, inflag, iceflag, liqflag, cldfrac, & |
|---|
| 530 | tauc, ssac, asmc, fsfc, ciwp, clwp, rei, rel, & |
|---|
| 531 | taucldorig, taucloud, ssacloud, asmcloud) |
|---|
| 532 | icpr = 1 |
|---|
| 533 | |
|---|
| 534 | ! Calculate coefficients for the temperature and pressure dependence of the |
|---|
| 535 | ! molecular absorption coefficients by interpolating data from stored |
|---|
| 536 | ! reference atmospheres. |
|---|
| 537 | |
|---|
| 538 | call setcoef_sw(nlayers, pavel, tavel, pz, tz, tbound, coldry, wkl, & |
|---|
| 539 | laytrop, layswtch, laylow, jp, jt, jt1, & |
|---|
| 540 | co2mult, colch4, colco2, colh2o, colmol, coln2o, & |
|---|
| 541 | colo2, colo3, fac00, fac01, fac10, fac11, & |
|---|
| 542 | selffac, selffrac, indself, forfac, forfrac, indfor) |
|---|
| 543 | |
|---|
| 544 | |
|---|
| 545 | ! Cosine of the solar zenith angle |
|---|
| 546 | ! Prevent using value of zero; ideally, SW model is not called from host model when sun |
|---|
| 547 | ! is below horizon |
|---|
| 548 | |
|---|
| 549 | cossza = coszen(iplon) |
|---|
| 550 | if (cossza .lt. zepzen) cossza = zepzen |
|---|
| 551 | |
|---|
| 552 | |
|---|
| 553 | ! Transfer albedo, cloud and aerosol properties into arrays for 2-stream radiative transfer |
|---|
| 554 | |
|---|
| 555 | ! Surface albedo |
|---|
| 556 | ! Near-IR bands 16-24 and 29 (1-9 and 14), 820-16000 cm-1, 0.625-12.195 microns |
|---|
| 557 | do ib=1,9 |
|---|
| 558 | albdir(ib) = aldir(iplon) |
|---|
| 559 | albdif(ib) = aldif(iplon) |
|---|
| 560 | enddo |
|---|
| 561 | albdir(nbndsw) = aldir(iplon) |
|---|
| 562 | albdif(nbndsw) = aldif(iplon) |
|---|
| 563 | ! UV/visible bands 25-28 (10-13), 16000-50000 cm-1, 0.200-0.625 micron |
|---|
| 564 | do ib=10,13 |
|---|
| 565 | albdir(ib) = asdir(iplon) |
|---|
| 566 | albdif(ib) = asdif(iplon) |
|---|
| 567 | enddo |
|---|
| 568 | |
|---|
| 569 | |
|---|
| 570 | ! Clouds |
|---|
| 571 | if (icld.eq.0) then |
|---|
| 572 | |
|---|
| 573 | ztauc(:,:) = 0._rb |
|---|
| 574 | ztaucorig(:,:) = 0._rb |
|---|
| 575 | zasyc(:,:) = 0._rb |
|---|
| 576 | zomgc(:,:) = 1._rb |
|---|
| 577 | |
|---|
| 578 | elseif (icld.ge.1) then |
|---|
| 579 | do i=1,nlayers |
|---|
| 580 | do ib=1,nbndsw |
|---|
| 581 | ztauc(i,ib) = taucloud(i,jpb1-1+ib) |
|---|
| 582 | ztaucorig(i,ib) = taucldorig(i,jpb1-1+ib) |
|---|
| 583 | zasyc(i,ib) = asmcloud(i,jpb1-1+ib) |
|---|
| 584 | zomgc(i,ib) = ssacloud(i,jpb1-1+ib) |
|---|
| 585 | enddo |
|---|
| 586 | enddo |
|---|
| 587 | |
|---|
| 588 | endif |
|---|
| 589 | |
|---|
| 590 | ! Aerosol |
|---|
| 591 | ! IAER = 0: no aerosols |
|---|
| 592 | if (iaer.eq.0) then |
|---|
| 593 | |
|---|
| 594 | ztaua(:,:) = 0._rb |
|---|
| 595 | zasya(:,:) = 0._rb |
|---|
| 596 | zomga(:,:) = 1._rb |
|---|
| 597 | |
|---|
| 598 | ! IAER = 6: Use ECMWF six aerosol types. See rrsw_aer.f90 for details. |
|---|
| 599 | ! Input aerosol optical thickness at 0.55 micron for each aerosol type (ecaer), |
|---|
| 600 | ! or set manually here for each aerosol and layer. |
|---|
| 601 | elseif (iaer.eq.6) then |
|---|
| 602 | |
|---|
| 603 | ! do i = 1, nlayers |
|---|
| 604 | ! do ia = 1, naerec |
|---|
| 605 | ! ecaer(iplon,i,ia) = 1.0e-15_rb |
|---|
| 606 | ! enddo |
|---|
| 607 | ! enddo |
|---|
| 608 | |
|---|
| 609 | do i = 1, nlayers |
|---|
| 610 | do ib = 1, nbndsw |
|---|
| 611 | ztaua(i,ib) = 0._rb |
|---|
| 612 | zasya(i,ib) = 0._rb |
|---|
| 613 | zomga(i,ib) = 0._rb |
|---|
| 614 | do ia = 1, naerec |
|---|
| 615 | ztaua(i,ib) = ztaua(i,ib) + rsrtaua(ib,ia) * ecaer(iplon,i,ia) |
|---|
| 616 | zomga(i,ib) = zomga(i,ib) + rsrtaua(ib,ia) * ecaer(iplon,i,ia) * & |
|---|
| 617 | rsrpiza(ib,ia) |
|---|
| 618 | zasya(i,ib) = zasya(i,ib) + rsrtaua(ib,ia) * ecaer(iplon,i,ia) * & |
|---|
| 619 | rsrpiza(ib,ia) * rsrasya(ib,ia) |
|---|
| 620 | enddo |
|---|
| 621 | if (ztaua(i,ib) == 0._rb) then |
|---|
| 622 | ztaua(i,ib) = 0._rb |
|---|
| 623 | zasya(i,ib) = 0._rb |
|---|
| 624 | zomga(i,ib) = 1._rb |
|---|
| 625 | else |
|---|
| 626 | if (zomga(i,ib) /= 0._rb) then |
|---|
| 627 | zasya(i,ib) = zasya(i,ib) / zomga(i,ib) |
|---|
| 628 | endif |
|---|
| 629 | if (ztaua(i,ib) /= 0._rb) then |
|---|
| 630 | zomga(i,ib) = zomga(i,ib) / ztaua(i,ib) |
|---|
| 631 | endif |
|---|
| 632 | endif |
|---|
| 633 | enddo |
|---|
| 634 | enddo |
|---|
| 635 | |
|---|
| 636 | ! IAER=10: Direct specification of aerosol optical properties from GCM |
|---|
| 637 | elseif (iaer.eq.10) then |
|---|
| 638 | |
|---|
| 639 | do i = 1 ,nlayers |
|---|
| 640 | do ib = 1 ,nbndsw |
|---|
| 641 | ztaua(i,ib) = taua(i,ib) |
|---|
| 642 | zasya(i,ib) = asma(i,ib) |
|---|
| 643 | zomga(i,ib) = ssaa(i,ib) |
|---|
| 644 | enddo |
|---|
| 645 | enddo |
|---|
| 646 | |
|---|
| 647 | endif |
|---|
| 648 | |
|---|
| 649 | |
|---|
| 650 | ! Call the 2-stream radiation transfer model |
|---|
| 651 | |
|---|
| 652 | do i=1,nlayers+1 |
|---|
| 653 | zbbcu(i) = 0._rb |
|---|
| 654 | zbbcd(i) = 0._rb |
|---|
| 655 | zbbfu(i) = 0._rb |
|---|
| 656 | zbbfd(i) = 0._rb |
|---|
| 657 | zbbcddir(i) = 0._rb |
|---|
| 658 | zbbfddir(i) = 0._rb |
|---|
| 659 | zuvcd(i) = 0._rb |
|---|
| 660 | zuvfd(i) = 0._rb |
|---|
| 661 | zuvcddir(i) = 0._rb |
|---|
| 662 | zuvfddir(i) = 0._rb |
|---|
| 663 | znicd(i) = 0._rb |
|---|
| 664 | znifd(i) = 0._rb |
|---|
| 665 | znicddir(i) = 0._rb |
|---|
| 666 | znifddir(i) = 0._rb |
|---|
| 667 | enddo |
|---|
| 668 | |
|---|
| 669 | call spcvrt_sw & |
|---|
| 670 | (nlayers, istart, iend, icpr, idelm, iout, & |
|---|
| 671 | pavel, tavel, pz, tz, tbound, albdif, albdir, & |
|---|
| 672 | cldfrac, ztauc, zasyc, zomgc, ztaucorig, & |
|---|
| 673 | ztaua, zasya, zomga, cossza, coldry, wkl, adjflux, & |
|---|
| 674 | laytrop, layswtch, laylow, jp, jt, jt1, & |
|---|
| 675 | co2mult, colch4, colco2, colh2o, colmol, coln2o, colo2, colo3, & |
|---|
| 676 | fac00, fac01, fac10, fac11, & |
|---|
| 677 | selffac, selffrac, indself, forfac, forfrac, indfor, & |
|---|
| 678 | zbbfd, zbbfu, zbbcd, zbbcu, zuvfd, zuvcd, znifd, znicd, & |
|---|
| 679 | zbbfddir, zbbcddir, zuvfddir, zuvcddir, znifddir, znicddir) |
|---|
| 680 | |
|---|
| 681 | ! Transfer up and down, clear and total sky fluxes to output arrays. |
|---|
| 682 | ! Vertical indexing goes from bottom to top; reverse here for GCM if necessary. |
|---|
| 683 | |
|---|
| 684 | do i = 1, nlayers+1 |
|---|
| 685 | swuflxc(iplon,i) = zbbcu(i) |
|---|
| 686 | swdflxc(iplon,i) = zbbcd(i) |
|---|
| 687 | swuflx(iplon,i) = zbbfu(i) |
|---|
| 688 | swdflx(iplon,i) = zbbfd(i) |
|---|
| 689 | uvdflx(i) = zuvfd(i) |
|---|
| 690 | nidflx(i) = znifd(i) |
|---|
| 691 | ! Direct/diffuse fluxes |
|---|
| 692 | dirdflux(i) = zbbfddir(i) |
|---|
| 693 | difdflux(i) = swdflx(iplon,i) - dirdflux(i) |
|---|
| 694 | ! UV/visible direct/diffuse fluxes |
|---|
| 695 | dirdnuv(i) = zuvfddir(i) |
|---|
| 696 | difdnuv(i) = zuvfd(i) - dirdnuv(i) |
|---|
| 697 | ! Near-IR direct/diffuse fluxes |
|---|
| 698 | dirdnir(i) = znifddir(i) |
|---|
| 699 | difdnir(i) = znifd(i) - dirdnir(i) |
|---|
| 700 | enddo |
|---|
| 701 | |
|---|
| 702 | ! Total and clear sky net fluxes |
|---|
| 703 | do i = 1, nlayers+1 |
|---|
| 704 | swnflxc(i) = swdflxc(iplon,i) - swuflxc(iplon,i) |
|---|
| 705 | swnflx(i) = swdflx(iplon,i) - swuflx(iplon,i) |
|---|
| 706 | enddo |
|---|
| 707 | |
|---|
| 708 | ! Total and clear sky heating rates |
|---|
| 709 | do i = 1, nlayers |
|---|
| 710 | zdpgcp = heatfac / pdp(i) |
|---|
| 711 | swhrc(iplon,i) = (swnflxc(i+1) - swnflxc(i)) * zdpgcp |
|---|
| 712 | swhr(iplon,i) = (swnflx(i+1) - swnflx(i)) * zdpgcp |
|---|
| 713 | enddo |
|---|
| 714 | swhrc(iplon,nlayers) = 0._rb |
|---|
| 715 | swhr(iplon,nlayers) = 0._rb |
|---|
| 716 | |
|---|
| 717 | ! End longitude loop |
|---|
| 718 | enddo |
|---|
| 719 | |
|---|
| 720 | end subroutine rrtmg_sw |
|---|
| 721 | |
|---|
| 722 | !************************************************************************* |
|---|
| 723 | real(kind=rb) function earth_sun(idn) |
|---|
| 724 | !************************************************************************* |
|---|
| 725 | ! |
|---|
| 726 | ! Purpose: Function to calculate the correction factor of Earth's orbit |
|---|
| 727 | ! for current day of the year |
|---|
| 728 | |
|---|
| 729 | ! idn : Day of the year |
|---|
| 730 | ! earth_sun : square of the ratio of mean to actual Earth-Sun distance |
|---|
| 731 | |
|---|
| 732 | ! ------- Modules ------- |
|---|
| 733 | |
|---|
| 734 | use rrsw_con, only : pi |
|---|
| 735 | |
|---|
| 736 | integer(kind=im), intent(in) :: idn |
|---|
| 737 | |
|---|
| 738 | real(kind=rb) :: gamma |
|---|
| 739 | |
|---|
| 740 | gamma = 2._rb*pi*(idn-1)/365._rb |
|---|
| 741 | |
|---|
| 742 | ! Use Iqbal's equation 1.2.1 |
|---|
| 743 | |
|---|
| 744 | earth_sun = 1.000110_rb + .034221_rb * cos(gamma) + .001289_rb * sin(gamma) + & |
|---|
| 745 | .000719_rb * cos(2._rb*gamma) + .000077_rb * sin(2._rb*gamma) |
|---|
| 746 | |
|---|
| 747 | end function earth_sun |
|---|
| 748 | |
|---|
| 749 | !*************************************************************************** |
|---|
| 750 | subroutine inatm_sw (iplon, nlay, icld, iaer, & |
|---|
| 751 | play, plev, tlay, tlev, tsfc, h2ovmr, & |
|---|
| 752 | o3vmr, co2vmr, ch4vmr, n2ovmr, o2vmr, & |
|---|
| 753 | adjes, dyofyr, scon, inflgsw, iceflgsw, liqflgsw, & |
|---|
| 754 | cldfr, taucld, ssacld, asmcld, fsfcld, cicewp, cliqwp, & |
|---|
| 755 | reice, reliq, tauaer, ssaaer, asmaer, & |
|---|
| 756 | nlayers, pavel, pz, pdp, tavel, tz, tbound, coldry, wkl, & |
|---|
| 757 | adjflux, solvar, inflag, iceflag, liqflag, cldfrac, tauc, & |
|---|
| 758 | ssac, asmc, fsfc, ciwp, clwp, rei, rel, taua, ssaa, asma) |
|---|
| 759 | !*************************************************************************** |
|---|
| 760 | ! |
|---|
| 761 | ! Input atmospheric profile from GCM, and prepare it for use in RRTMG_SW. |
|---|
| 762 | ! Set other RRTMG_SW input parameters. |
|---|
| 763 | ! |
|---|
| 764 | !*************************************************************************** |
|---|
| 765 | |
|---|
| 766 | ! --------- Modules ---------- |
|---|
| 767 | |
|---|
| 768 | use parrrsw, only : nbndsw, ngptsw, nstr, nmol, mxmol, & |
|---|
| 769 | jpband, jpb1, jpb2, rrsw_scon |
|---|
| 770 | use rrsw_con, only : fluxfac, heatfac, oneminus, pi, grav, avogad |
|---|
| 771 | use rrsw_wvn, only : ng, nspa, nspb, wavenum1, wavenum2, delwave |
|---|
| 772 | |
|---|
| 773 | ! ------- Declarations ------- |
|---|
| 774 | |
|---|
| 775 | ! ----- Input ----- |
|---|
| 776 | ! Note: All volume mixing ratios are in dimensionless units of mole fraction obtained |
|---|
| 777 | ! by scaling mass mixing ratio (g/g) with the appropriate molecular weights (g/mol) |
|---|
| 778 | integer(kind=im), intent(in) :: iplon ! column loop index |
|---|
| 779 | integer(kind=im), intent(in) :: nlay ! number of model layers |
|---|
| 780 | integer(kind=im), intent(in) :: icld ! clear/cloud flag |
|---|
| 781 | integer(kind=im), intent(in) :: iaer ! aerosol option flag |
|---|
| 782 | |
|---|
| 783 | real(kind=rb), intent(in) :: play(:,:) ! Layer pressures (hPa, mb) |
|---|
| 784 | ! Dimensions: (ncol,nlay) |
|---|
| 785 | real(kind=rb), intent(in) :: plev(:,:) ! Interface pressures (hPa, mb) |
|---|
| 786 | ! Dimensions: (ncol,nlay+1) |
|---|
| 787 | real(kind=rb), intent(in) :: tlay(:,:) ! Layer temperatures (K) |
|---|
| 788 | ! Dimensions: (ncol,nlay) |
|---|
| 789 | real(kind=rb), intent(in) :: tlev(:,:) ! Interface temperatures (K) |
|---|
| 790 | ! Dimensions: (ncol,nlay+1) |
|---|
| 791 | real(kind=rb), intent(in) :: tsfc(:) ! Surface temperature (K) |
|---|
| 792 | ! Dimensions: (ncol) |
|---|
| 793 | real(kind=rb), intent(in) :: h2ovmr(:,:) ! H2O volume mixing ratio |
|---|
| 794 | ! Dimensions: (ncol,nlay) |
|---|
| 795 | real(kind=rb), intent(in) :: o3vmr(:,:) ! O3 volume mixing ratio |
|---|
| 796 | ! Dimensions: (ncol,nlay) |
|---|
| 797 | real(kind=rb), intent(in) :: co2vmr(:,:) ! CO2 volume mixing ratio |
|---|
| 798 | ! Dimensions: (ncol,nlay) |
|---|
| 799 | real(kind=rb), intent(in) :: ch4vmr(:,:) ! Methane volume mixing ratio |
|---|
| 800 | ! Dimensions: (ncol,nlay) |
|---|
| 801 | real(kind=rb), intent(in) :: n2ovmr(:,:) ! Nitrous oxide volume mixing ratio |
|---|
| 802 | ! Dimensions: (ncol,nlay) |
|---|
| 803 | real(kind=rb), intent(in) :: o2vmr(:,:) ! Oxygen volume mixing ratio |
|---|
| 804 | ! Dimensions: (ncol,nlay) |
|---|
| 805 | |
|---|
| 806 | integer(kind=im), intent(in) :: dyofyr ! Day of the year (used to get Earth/Sun |
|---|
| 807 | ! distance if adjflx not provided) |
|---|
| 808 | real(kind=rb), intent(in) :: adjes ! Flux adjustment for Earth/Sun distance |
|---|
| 809 | real(kind=rb), intent(in) :: scon ! Solar constant (W/m2) |
|---|
| 810 | |
|---|
| 811 | integer(kind=im), intent(in) :: inflgsw ! Flag for cloud optical properties |
|---|
| 812 | integer(kind=im), intent(in) :: iceflgsw ! Flag for ice particle specification |
|---|
| 813 | integer(kind=im), intent(in) :: liqflgsw ! Flag for liquid droplet specification |
|---|
| 814 | |
|---|
| 815 | real(kind=rb), intent(in) :: cldfr(:,:) ! Cloud fraction |
|---|
| 816 | ! Dimensions: (ncol,nlay) |
|---|
| 817 | real(kind=rb), intent(in) :: taucld(:,:,:) ! In-cloud optical depth (optional) |
|---|
| 818 | ! Dimensions: (nbndsw,ncol,nlay) |
|---|
| 819 | real(kind=rb), intent(in) :: ssacld(:,:,:) ! In-cloud single scattering albedo |
|---|
| 820 | ! Dimensions: (nbndsw,ncol,nlay) |
|---|
| 821 | real(kind=rb), intent(in) :: asmcld(:,:,:) ! In-cloud asymmetry parameter |
|---|
| 822 | ! Dimensions: (nbndsw,ncol,nlay) |
|---|
| 823 | real(kind=rb), intent(in) :: fsfcld(:,:,:) ! In-cloud forward scattering fraction |
|---|
| 824 | ! Dimensions: (nbndsw,ncol,nlay) |
|---|
| 825 | real(kind=rb), intent(in) :: cicewp(:,:) ! In-cloud ice water path (g/m2) |
|---|
| 826 | ! Dimensions: (ncol,nlay) |
|---|
| 827 | real(kind=rb), intent(in) :: cliqwp(:,:) ! In-cloud liquid water path (g/m2) |
|---|
| 828 | ! Dimensions: (ncol,nlay) |
|---|
| 829 | real(kind=rb), intent(in) :: reice(:,:) ! Cloud ice effective size (microns) |
|---|
| 830 | ! Dimensions: (ncol,nlay) |
|---|
| 831 | real(kind=rb), intent(in) :: reliq(:,:) ! Cloud water drop effective radius (microns) |
|---|
| 832 | ! Dimensions: (ncol,nlay) |
|---|
| 833 | |
|---|
| 834 | real(kind=rb), intent(in) :: tauaer(:,:,:) ! Aerosol optical depth |
|---|
| 835 | ! Dimensions: (ncol,nlay,nbndsw) |
|---|
| 836 | real(kind=rb), intent(in) :: ssaaer(:,:,:) ! Aerosol single scattering albedo |
|---|
| 837 | ! Dimensions: (ncol,nlay,nbndsw) |
|---|
| 838 | real(kind=rb), intent(in) :: asmaer(:,:,:) ! Aerosol asymmetry parameter |
|---|
| 839 | ! Dimensions: (ncol,nlay,nbndsw) |
|---|
| 840 | |
|---|
| 841 | ! Atmosphere |
|---|
| 842 | integer(kind=im), intent(out) :: nlayers ! number of layers |
|---|
| 843 | |
|---|
| 844 | real(kind=rb), intent(out) :: pavel(:) ! layer pressures (mb) |
|---|
| 845 | ! Dimensions: (nlay) |
|---|
| 846 | real(kind=rb), intent(out) :: tavel(:) ! layer temperatures (K) |
|---|
| 847 | ! Dimensions: (nlay) |
|---|
| 848 | real(kind=rb), intent(out) :: pz(0:) ! level (interface) pressures (hPa, mb) |
|---|
| 849 | ! Dimensions: (0:nlay) |
|---|
| 850 | real(kind=rb), intent(out) :: tz(0:) ! level (interface) temperatures (K) |
|---|
| 851 | ! Dimensions: (0:nlay) |
|---|
| 852 | real(kind=rb), intent(out) :: tbound ! surface temperature (K) |
|---|
| 853 | real(kind=rb), intent(out) :: pdp(:) ! layer pressure thickness (hPa, mb) |
|---|
| 854 | ! Dimensions: (nlay) |
|---|
| 855 | real(kind=rb), intent(out) :: coldry(:) ! dry air column density (mol/cm2) |
|---|
| 856 | ! Dimensions: (nlay) |
|---|
| 857 | real(kind=rb), intent(out) :: wkl(:,:) ! molecular amounts (mol/cm-2) |
|---|
| 858 | ! Dimensions: (mxmol,nlay) |
|---|
| 859 | |
|---|
| 860 | real(kind=rb), intent(out) :: adjflux(:) ! adjustment for current Earth/Sun distance |
|---|
| 861 | ! Dimensions: (jpband) |
|---|
| 862 | real(kind=rb), intent(out) :: solvar(:) ! solar constant scaling factor from rrtmg_sw |
|---|
| 863 | ! Dimensions: (jpband) |
|---|
| 864 | ! default value of 1368.22 Wm-2 at 1 AU |
|---|
| 865 | real(kind=rb), intent(out) :: taua(:,:) ! Aerosol optical depth |
|---|
| 866 | ! Dimensions: (nlay,nbndsw) |
|---|
| 867 | real(kind=rb), intent(out) :: ssaa(:,:) ! Aerosol single scattering albedo |
|---|
| 868 | ! Dimensions: (nlay,nbndsw) |
|---|
| 869 | real(kind=rb), intent(out) :: asma(:,:) ! Aerosol asymmetry parameter |
|---|
| 870 | ! Dimensions: (nlay,nbndsw) |
|---|
| 871 | |
|---|
| 872 | ! Atmosphere/clouds - cldprop |
|---|
| 873 | integer(kind=im), intent(out) :: inflag ! flag for cloud property method |
|---|
| 874 | integer(kind=im), intent(out) :: iceflag ! flag for ice cloud properties |
|---|
| 875 | integer(kind=im), intent(out) :: liqflag ! flag for liquid cloud properties |
|---|
| 876 | |
|---|
| 877 | real(kind=rb), intent(out) :: cldfrac(:) ! layer cloud fraction |
|---|
| 878 | ! Dimensions: (nlay) |
|---|
| 879 | real(kind=rb), intent(out) :: tauc(:,:) ! in-cloud optical depth (non-delta scaled) |
|---|
| 880 | ! Dimensions: (nbndsw,nlay) |
|---|
| 881 | real(kind=rb), intent(out) :: ssac(:,:) ! in-cloud single scattering albedo (non-delta-scaled) |
|---|
| 882 | ! Dimensions: (nbndsw,nlay) |
|---|
| 883 | real(kind=rb), intent(out) :: asmc(:,:) ! in-cloud asymmetry parameter (non-delta scaled) |
|---|
| 884 | ! Dimensions: (nbndsw,nlay) |
|---|
| 885 | real(kind=rb), intent(out) :: fsfc(:,:) ! in-cloud forward scattering fraction (non-delta scaled) |
|---|
| 886 | ! Dimensions: (nbndsw,nlay) |
|---|
| 887 | real(kind=rb), intent(out) :: ciwp(:) ! in-cloud ice water path |
|---|
| 888 | ! Dimensions: (nlay) |
|---|
| 889 | real(kind=rb), intent(out) :: clwp(:) ! in-cloud liquid water path |
|---|
| 890 | ! Dimensions: (nlay) |
|---|
| 891 | real(kind=rb), intent(out) :: rel(:) ! cloud liquid particle effective radius (microns) |
|---|
| 892 | ! Dimensions: (nlay) |
|---|
| 893 | real(kind=rb), intent(out) :: rei(:) ! cloud ice particle effective size (microns) |
|---|
| 894 | ! Dimensions: (nlay) |
|---|
| 895 | |
|---|
| 896 | ! ----- Local ----- |
|---|
| 897 | real(kind=rb), parameter :: amd = 28.9660_rb ! Effective molecular weight of dry air (g/mol) |
|---|
| 898 | real(kind=rb), parameter :: amw = 18.0160_rb ! Molecular weight of water vapor (g/mol) |
|---|
| 899 | ! real(kind=rb), parameter :: amc = 44.0098_rb ! Molecular weight of carbon dioxide (g/mol) |
|---|
| 900 | ! real(kind=rb), parameter :: amo = 47.9998_rb ! Molecular weight of ozone (g/mol) |
|---|
| 901 | ! real(kind=rb), parameter :: amo2 = 31.9999_rb ! Molecular weight of oxygen (g/mol) |
|---|
| 902 | ! real(kind=rb), parameter :: amch4 = 16.0430_rb ! Molecular weight of methane (g/mol) |
|---|
| 903 | ! real(kind=rb), parameter :: amn2o = 44.0128_rb ! Molecular weight of nitrous oxide (g/mol) |
|---|
| 904 | |
|---|
| 905 | ! Set molecular weight ratios (for converting mmr to vmr) |
|---|
| 906 | ! e.g. h2ovmr = h2ommr * amdw) |
|---|
| 907 | real(kind=rb), parameter :: amdw = 1.607793_rb ! Molecular weight of dry air / water vapor |
|---|
| 908 | real(kind=rb), parameter :: amdc = 0.658114_rb ! Molecular weight of dry air / carbon dioxide |
|---|
| 909 | real(kind=rb), parameter :: amdo = 0.603428_rb ! Molecular weight of dry air / ozone |
|---|
| 910 | real(kind=rb), parameter :: amdm = 1.805423_rb ! Molecular weight of dry air / methane |
|---|
| 911 | real(kind=rb), parameter :: amdn = 0.658090_rb ! Molecular weight of dry air / nitrous oxide |
|---|
| 912 | real(kind=rb), parameter :: amdo2 = 0.905140_rb ! Molecular weight of dry air / oxygen |
|---|
| 913 | |
|---|
| 914 | real(kind=rb), parameter :: sbc = 5.67e-08_rb ! Stefan-Boltzmann constant (W/m2K4) |
|---|
| 915 | |
|---|
| 916 | integer(kind=im) :: isp, l, ix, n, imol, ib ! Loop indices |
|---|
| 917 | real(kind=rb) :: amm, summol ! |
|---|
| 918 | real(kind=rb) :: adjflx ! flux adjustment for Earth/Sun distance |
|---|
| 919 | ! real(kind=rb) :: earth_sun ! function for Earth/Sun distance adjustment |
|---|
| 920 | |
|---|
| 921 | ! Add one to nlayers here to include extra model layer at top of atmosphere |
|---|
| 922 | nlayers = nlay |
|---|
| 923 | |
|---|
| 924 | ! Initialize all molecular amounts to zero here, then pass input amounts |
|---|
| 925 | ! into RRTM array WKL below. |
|---|
| 926 | |
|---|
| 927 | wkl(:,:) = 0.0_rb |
|---|
| 928 | cldfrac(:) = 0.0_rb |
|---|
| 929 | tauc(:,:) = 0.0_rb |
|---|
| 930 | ssac(:,:) = 1.0_rb |
|---|
| 931 | asmc(:,:) = 0.0_rb |
|---|
| 932 | fsfc(:,:) = 0.0_rb |
|---|
| 933 | ciwp(:) = 0.0_rb |
|---|
| 934 | clwp(:) = 0.0_rb |
|---|
| 935 | rei(:) = 0.0_rb |
|---|
| 936 | rel(:) = 0.0_rb |
|---|
| 937 | taua(:,:) = 0.0_rb |
|---|
| 938 | ssaa(:,:) = 1.0_rb |
|---|
| 939 | asma(:,:) = 0.0_rb |
|---|
| 940 | |
|---|
| 941 | ! Set flux adjustment for current Earth/Sun distance (two options). |
|---|
| 942 | ! 1) Use Earth/Sun distance flux adjustment provided by GCM (input as adjes); |
|---|
| 943 | adjflx = adjes |
|---|
| 944 | ! |
|---|
| 945 | ! 2) Calculate Earth/Sun distance from DYOFYR, the cumulative day of the year. |
|---|
| 946 | ! (Set adjflx to 1. to use constant Earth/Sun distance of 1 AU). |
|---|
| 947 | if (dyofyr .gt. 0) then |
|---|
| 948 | adjflx = earth_sun(dyofyr) |
|---|
| 949 | endif |
|---|
| 950 | |
|---|
| 951 | ! Set incoming solar flux adjustment to include adjustment for |
|---|
| 952 | ! current Earth/Sun distance (ADJFLX) and scaling of default internal |
|---|
| 953 | ! solar constant (rrsw_scon = 1368.22 Wm-2) by band (SOLVAR). SOLVAR can be set |
|---|
| 954 | ! to a single scaling factor as needed, or to a different value in each |
|---|
| 955 | ! band, which may be necessary for paleoclimate simulations. |
|---|
| 956 | ! |
|---|
| 957 | do ib = jpb1,jpb2 |
|---|
| 958 | ! solvar(ib) = 1._rb |
|---|
| 959 | solvar(ib) = scon / rrsw_scon |
|---|
| 960 | adjflux(ib) = adjflx * solvar(ib) |
|---|
| 961 | enddo |
|---|
| 962 | |
|---|
| 963 | ! Set surface temperature. |
|---|
| 964 | tbound = tsfc(iplon) |
|---|
| 965 | |
|---|
| 966 | ! Install input GCM arrays into RRTMG_SW arrays for pressure, temperature, |
|---|
| 967 | ! and molecular amounts. |
|---|
| 968 | ! Pressures are input in mb, or are converted to mb here. |
|---|
| 969 | ! Molecular amounts are input in volume mixing ratio, or are converted from |
|---|
| 970 | ! mass mixing ratio (or specific humidity for h2o) to volume mixing ratio |
|---|
| 971 | ! here. These are then converted to molecular amount (molec/cm2) below. |
|---|
| 972 | ! The dry air column COLDRY (in molec/cm2) is calculated from the level |
|---|
| 973 | ! pressures, pz (in mb), based on the hydrostatic equation and includes a |
|---|
| 974 | ! correction to account for h2o in the layer. The molecular weight of moist |
|---|
| 975 | ! air (amm) is calculated for each layer. |
|---|
| 976 | ! Note: In RRTMG, layer indexing goes from bottom to top, and coding below |
|---|
| 977 | ! assumes GCM input fields are also bottom to top. Input layer indexing |
|---|
| 978 | ! from GCM fields should be reversed here if necessary. |
|---|
| 979 | |
|---|
| 980 | pz(0) = plev(iplon,1) |
|---|
| 981 | tz(0) = tlev(iplon,1) |
|---|
| 982 | do l = 1, nlayers |
|---|
| 983 | pavel(l) = play(iplon,l) |
|---|
| 984 | tavel(l) = tlay(iplon,l) |
|---|
| 985 | pz(l) = plev(iplon,l+1) |
|---|
| 986 | tz(l) = tlev(iplon,l+1) |
|---|
| 987 | pdp(l) = pz(l-1) - pz(l) |
|---|
| 988 | ! For h2o input in vmr: |
|---|
| 989 | wkl(1,l) = h2ovmr(iplon,l) |
|---|
| 990 | ! For h2o input in mmr: |
|---|
| 991 | ! wkl(1,l) = h2o(iplon,l)*amdw |
|---|
| 992 | ! For h2o input in specific humidity; |
|---|
| 993 | ! wkl(1,l) = (h2o(iplon,l)/(1._rb - h2o(iplon,l)))*amdw |
|---|
| 994 | wkl(2,l) = co2vmr(iplon,l) |
|---|
| 995 | wkl(3,l) = o3vmr(iplon,l) |
|---|
| 996 | wkl(4,l) = n2ovmr(iplon,l) |
|---|
| 997 | wkl(6,l) = ch4vmr(iplon,l) |
|---|
| 998 | wkl(7,l) = o2vmr(iplon,l) |
|---|
| 999 | amm = (1._rb - wkl(1,l)) * amd + wkl(1,l) * amw |
|---|
| 1000 | coldry(l) = (pz(l-1)-pz(l)) * 1.e3_rb * avogad / & |
|---|
| 1001 | (1.e2_rb * grav * amm * (1._rb + wkl(1,l))) |
|---|
| 1002 | enddo |
|---|
| 1003 | |
|---|
| 1004 | ! The following section can be used to set values for an additional layer (from |
|---|
| 1005 | ! the GCM top level to 1.e-4 mb) for improved calculation of TOA fluxes. |
|---|
| 1006 | ! Temperature and molecular amounts in the extra model layer are set to |
|---|
| 1007 | ! their values in the top GCM model layer, though these can be modified |
|---|
| 1008 | ! here if necessary. |
|---|
| 1009 | ! If this feature is utilized, increase nlayers by one above, limit the two |
|---|
| 1010 | ! loops above to (nlayers-1), and set the top most (nlayers) layer values here. |
|---|
| 1011 | |
|---|
| 1012 | ! pavel(nlayers) = 0.5_rb * pz(nlayers-1) |
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| 1013 | ! tavel(nlayers) = tavel(nlayers-1) |
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| 1014 | ! pz(nlayers) = 1.e-4_rb |
|---|
| 1015 | ! tz(nlayers-1) = 0.5_rb * (tavel(nlayers)+tavel(nlayers-1)) |
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| 1016 | ! tz(nlayers) = tz(nlayers-1) |
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| 1017 | ! pdp(nlayers) = pz(nlayers-1) - pz(nlayers) |
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| 1018 | ! wkl(1,nlayers) = wkl(1,nlayers-1) |
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| 1019 | ! wkl(2,nlayers) = wkl(2,nlayers-1) |
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| 1020 | ! wkl(3,nlayers) = wkl(3,nlayers-1) |
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| 1021 | ! wkl(4,nlayers) = wkl(4,nlayers-1) |
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| 1022 | ! wkl(6,nlayers) = wkl(6,nlayers-1) |
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| 1023 | ! wkl(7,nlayers) = wkl(7,nlayers-1) |
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| 1024 | ! amm = (1._rb - wkl(1,nlayers-1)) * amd + wkl(1,nlayers-1) * amw |
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| 1025 | ! coldry(nlayers) = (pz(nlayers-1)) * 1.e3_rb * avogad / & |
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| 1026 | ! (1.e2_rb * grav * amm * (1._rb + wkl(1,nlayers-1))) |
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| 1027 | |
|---|
| 1028 | ! At this point all molecular amounts in wkl are in volume mixing ratio; |
|---|
| 1029 | ! convert to molec/cm2 based on coldry for use in rrtm. |
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| 1030 | |
|---|
| 1031 | do l = 1, nlayers |
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| 1032 | do imol = 1, nmol |
|---|
| 1033 | wkl(imol,l) = coldry(l) * wkl(imol,l) |
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| 1034 | enddo |
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| 1035 | enddo |
|---|
| 1036 | |
|---|
| 1037 | ! Transfer aerosol optical properties to RRTM variables; |
|---|
| 1038 | ! modify to reverse layer indexing here if necessary. |
|---|
| 1039 | |
|---|
| 1040 | if (iaer .ge. 1) then |
|---|
| 1041 | do l = 1, nlayers |
|---|
| 1042 | do ib = 1, nbndsw |
|---|
| 1043 | taua(l,ib) = tauaer(iplon,l,ib) |
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| 1044 | ssaa(l,ib) = ssaaer(iplon,l,ib) |
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| 1045 | asma(l,ib) = asmaer(iplon,l,ib) |
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| 1046 | enddo |
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| 1047 | enddo |
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| 1048 | endif |
|---|
| 1049 | |
|---|
| 1050 | ! Transfer cloud fraction and cloud optical properties to RRTM variables; |
|---|
| 1051 | ! modify to reverse layer indexing here if necessary. |
|---|
| 1052 | |
|---|
| 1053 | if (icld .ge. 1) then |
|---|
| 1054 | inflag = inflgsw |
|---|
| 1055 | iceflag = iceflgsw |
|---|
| 1056 | liqflag = liqflgsw |
|---|
| 1057 | |
|---|
| 1058 | ! Move incoming GCM cloud arrays to RRTMG cloud arrays. |
|---|
| 1059 | ! For GCM input, incoming reice is defined based on selected ice parameterization (inflglw) |
|---|
| 1060 | |
|---|
| 1061 | do l = 1, nlayers |
|---|
| 1062 | cldfrac(l) = cldfr(iplon,l) |
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| 1063 | ciwp(l) = cicewp(iplon,l) |
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| 1064 | clwp(l) = cliqwp(iplon,l) |
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| 1065 | rei(l) = reice(iplon,l) |
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| 1066 | rel(l) = reliq(iplon,l) |
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| 1067 | do n = 1,nbndsw |
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| 1068 | tauc(n,l) = taucld(n,iplon,l) |
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| 1069 | ssac(n,l) = ssacld(n,iplon,l) |
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| 1070 | asmc(n,l) = asmcld(n,iplon,l) |
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| 1071 | fsfc(n,l) = fsfcld(n,iplon,l) |
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| 1072 | enddo |
|---|
| 1073 | enddo |
|---|
| 1074 | |
|---|
| 1075 | ! If an extra layer is being used in RRTMG, set all cloud properties to zero in the extra layer. |
|---|
| 1076 | |
|---|
| 1077 | ! cldfrac(nlayers) = 0.0_rb |
|---|
| 1078 | ! tauc(:,nlayers) = 0.0_rb |
|---|
| 1079 | ! ssac(:,nlayers) = 1.0_rb |
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| 1080 | ! asmc(:,nlayers) = 0.0_rb |
|---|
| 1081 | ! fsfc(:,nlayers) = 0.0_rb |
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| 1082 | ! ciwp(nlayers) = 0.0_rb |
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| 1083 | ! clwp(nlayers) = 0.0_rb |
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| 1084 | ! rei(nlayers) = 0.0_rb |
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| 1085 | ! rel(nlayers) = 0.0_rb |
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| 1086 | |
|---|
| 1087 | endif |
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| 1088 | |
|---|
| 1089 | end subroutine inatm_sw |
|---|
| 1090 | |
|---|
| 1091 | end module rrtmg_sw_rad |
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| 1092 | |
|---|
| 1093 | |
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