| 1 | ! radiation_tripleclouds_sw.F90 - Shortwave "Tripleclouds" solver |
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| 2 | ! |
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| 3 | ! (C) Copyright 2016- ECMWF. |
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| 4 | ! |
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| 5 | ! This software is licensed under the terms of the Apache Licence Version 2.0 |
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| 6 | ! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. |
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| 7 | ! |
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| 8 | ! In applying this licence, ECMWF does not waive the privileges and immunities |
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| 9 | ! granted to it by virtue of its status as an intergovernmental organisation |
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| 10 | ! nor does it submit to any jurisdiction. |
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| 11 | ! |
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| 12 | ! Author: Robin Hogan |
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| 13 | ! Email: r.j.hogan@ecmwf.int |
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| 14 | ! |
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| 15 | ! Modifications |
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| 16 | ! 2017-04-11 R. Hogan Receive albedos at g-points |
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| 17 | ! 2017-04-22 R. Hogan Store surface fluxes at all g-points |
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| 18 | ! 2017-10-23 R. Hogan Renamed single-character variables |
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| 19 | ! 2018-10-08 R. Hogan Call calc_region_properties |
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| 20 | ! 2019-01-02 R. Hogan Fixed problem of do_save_spectral_flux .and. .not. do_sw_direct |
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| 21 | ! 2020-09-18 R. Hogan Replaced some array expressions with loops for speed |
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| 22 | |
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| 23 | module radiation_tripleclouds_sw |
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| 24 | |
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| 25 | public |
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| 26 | |
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| 27 | contains |
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| 28 | ! Provides elemental function "delta_eddington" |
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| 29 | #include "radiation_delta_eddington.h" |
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| 30 | |
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| 31 | ! Small routine for scaling cloud optical depth in the cloudy |
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| 32 | ! regions |
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| 33 | #include "radiation_optical_depth_scaling.h" |
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| 34 | |
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| 35 | !--------------------------------------------------------------------- |
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| 36 | ! This module contains just one subroutine, the shortwave |
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| 37 | ! "Tripleclouds" solver in which cloud inhomogeneity is treated by |
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| 38 | ! dividing each model level into three regions, one clear and two |
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| 39 | ! cloudy (with differing optical depth). This approach was described |
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| 40 | ! by Shonk and Hogan (2008). |
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| 41 | subroutine solver_tripleclouds_sw(nlev,istartcol,iendcol, & |
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| 42 | & config, single_level, cloud, & |
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| 43 | & od, ssa, g, od_cloud, ssa_cloud, g_cloud, & |
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| 44 | & albedo_direct, albedo_diffuse, incoming_sw, & |
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| 45 | & flux) |
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| 46 | |
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| 47 | use parkind1, only : jprb |
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| 48 | use yomhook, only : lhook, dr_hook |
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| 49 | |
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| 50 | ! use radiation_io, only : nulout |
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| 51 | use radiation_config, only : config_type, IPdfShapeGamma |
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| 52 | use radiation_single_level, only : single_level_type |
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| 53 | use radiation_cloud, only : cloud_type |
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| 54 | use radiation_regions, only : calc_region_properties |
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| 55 | use radiation_overlap, only : calc_overlap_matrices |
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| 56 | use radiation_flux, only : flux_type, & |
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| 57 | & indexed_sum, add_indexed_sum |
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| 58 | use radiation_matrix, only : singlemat_x_vec |
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| 59 | use radiation_two_stream, only : calc_two_stream_gammas_sw, & |
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| 60 | & calc_reflectance_transmittance_sw |
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| 61 | |
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| 62 | implicit none |
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| 63 | |
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| 64 | ! Inputs |
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| 65 | integer, intent(in) :: nlev ! number of model levels |
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| 66 | integer, intent(in) :: istartcol, iendcol ! range of columns to process |
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| 67 | type(config_type), intent(in) :: config |
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| 68 | type(single_level_type), intent(in) :: single_level |
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| 69 | type(cloud_type), intent(in) :: cloud |
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| 70 | |
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| 71 | ! Gas and aerosol optical depth, single-scattering albedo and |
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| 72 | ! asymmetry factor at each shortwave g-point |
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| 73 | ! real(jprb), intent(in), dimension(istartcol:iendcol,nlev,config%n_g_sw) :: & |
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| 74 | real(jprb), intent(in), dimension(config%n_g_sw,nlev,istartcol:iendcol) :: & |
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| 75 | & od, ssa, g |
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| 76 | |
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| 77 | ! Cloud and precipitation optical depth, single-scattering albedo and |
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| 78 | ! asymmetry factor in each shortwave band |
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| 79 | real(jprb), intent(in), dimension(config%n_bands_sw,nlev,istartcol:iendcol) :: & |
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| 80 | & od_cloud, ssa_cloud, g_cloud |
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| 81 | |
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| 82 | ! Optical depth, single scattering albedo and asymmetry factor in |
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| 83 | ! each g-point including gas, aerosol and clouds |
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| 84 | real(jprb), dimension(config%n_g_sw) :: od_total, ssa_total, g_total |
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| 85 | |
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| 86 | ! Direct and diffuse surface albedos, and the incoming shortwave |
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| 87 | ! flux into a plane perpendicular to the incoming radiation at |
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| 88 | ! top-of-atmosphere in each of the shortwave g points |
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| 89 | real(jprb), intent(in), dimension(config%n_g_sw,istartcol:iendcol) :: & |
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| 90 | & albedo_direct, albedo_diffuse, incoming_sw |
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| 91 | |
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| 92 | ! Output |
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| 93 | type(flux_type), intent(inout):: flux |
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| 94 | |
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| 95 | ! Local constants |
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| 96 | integer, parameter :: nregions = 3 |
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| 97 | |
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| 98 | ! In a clear-sky layer this will be 1, otherwise equal to nregions |
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| 99 | integer :: nreg |
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| 100 | |
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| 101 | ! Local variables |
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| 102 | |
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| 103 | ! The area fractions of each region |
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| 104 | real(jprb) :: region_fracs(1:nregions,nlev,istartcol:iendcol) |
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| 105 | |
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| 106 | ! The scaling used for the optical depth in the cloudy regions |
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| 107 | real(jprb) :: od_scaling(2:nregions,nlev,istartcol:iendcol) |
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| 108 | |
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| 109 | ! Directional overlap matrices defined at all layer interfaces |
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| 110 | ! including top-of-atmosphere and the surface |
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| 111 | real(jprb), dimension(nregions,nregions,nlev+1, & |
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| 112 | & istartcol:iendcol) :: u_matrix, v_matrix |
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| 113 | |
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| 114 | ! Two-stream variables |
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| 115 | real(jprb), dimension(config%n_g_sw) :: gamma1, gamma2, gamma3 |
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| 116 | |
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| 117 | ! Diffuse reflection and transmission matrices of each layer |
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| 118 | real(jprb), dimension(config%n_g_sw, nregions, nlev) & |
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| 119 | & :: reflectance, transmittance |
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| 120 | |
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| 121 | ! Terms translating the direct flux entering the layer from above |
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| 122 | ! to the reflected radiation exiting upwards (ref_dir) and the |
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| 123 | ! scattered radiation exiting downwards (trans_dir_diff), along with the |
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| 124 | ! direct unscattered transmission matrix (trans_dir_dir). |
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| 125 | real(jprb), dimension(config%n_g_sw, nregions, nlev) & |
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| 126 | & :: ref_dir, trans_dir_diff, trans_dir_dir |
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| 127 | |
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| 128 | ! Total albedo of the atmosphere/surface just above a layer |
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| 129 | ! interface with respect to downwelling diffuse and direct |
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| 130 | ! (respectively) radiation at that interface, where level index = |
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| 131 | ! 1 corresponds to the top-of-atmosphere |
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| 132 | real(jprb), dimension(config%n_g_sw, nregions, nlev+1) & |
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| 133 | & :: total_albedo, total_albedo_direct |
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| 134 | |
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| 135 | ! ...equivalent values for clear-skies |
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| 136 | real(jprb), dimension(config%n_g_sw, nlev+1) & |
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| 137 | & :: total_albedo_clear, total_albedo_clear_direct |
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| 138 | |
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| 139 | ! Total albedo of the atmosphere just below a layer interface |
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| 140 | real(jprb), dimension(config%n_g_sw, nregions) & |
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| 141 | & :: total_albedo_below, total_albedo_below_direct |
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| 142 | |
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| 143 | ! Direct downwelling flux below and above an interface between |
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| 144 | ! layers into a plane perpendicular to the direction of the sun |
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| 145 | real(jprb), dimension(config%n_g_sw, nregions) & |
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| 146 | & :: direct_dn, direct_dn_below |
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| 147 | ! Diffuse equivalents |
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| 148 | real(jprb), dimension(config%n_g_sw, nregions) & |
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| 149 | & :: flux_dn, flux_dn_below, flux_up |
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| 150 | |
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| 151 | ! ...clear-sky equivalent (no distinction between "above/below") |
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| 152 | real(jprb), dimension(config%n_g_sw) & |
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| 153 | & :: direct_dn_clear, flux_dn_clear, flux_up_clear |
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| 154 | |
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| 155 | ! Clear-sky equivalent, but actually its reciprocal to replace |
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| 156 | ! some divisions by multiplications |
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| 157 | real(jprb), dimension(config%n_g_sw, nregions) :: inv_denom |
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| 158 | |
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| 159 | ! Identify clear-sky layers, with pseudo layers for outer space |
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| 160 | ! and below the ground, both treated as single-region clear skies |
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| 161 | logical :: is_clear_sky_layer(0:nlev+1) |
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| 162 | |
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| 163 | ! Scattering optical depth of gas+aerosol and of cloud |
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| 164 | real(jprb) :: scat_od, scat_od_cloud |
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| 165 | |
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| 166 | real(jprb) :: mu0 |
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| 167 | |
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| 168 | integer :: jcol, jlev, jg, jreg, iband, jreg2, ng |
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| 169 | |
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| 170 | real(jprb) :: hook_handle |
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| 171 | |
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| 172 | if (lhook) call dr_hook('radiation_tripleclouds_sw:solver_tripleclouds_sw',0,hook_handle) |
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| 173 | |
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| 174 | ! -------------------------------------------------------- |
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| 175 | ! Section 1: Prepare general variables and arrays |
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| 176 | ! -------------------------------------------------------- |
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| 177 | ! Copy array dimensions to local variables for convenience |
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| 178 | ng = config%n_g_sw |
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| 179 | |
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| 180 | ! Compute the wavelength-independent region fractions and |
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| 181 | ! optical-depth scalings |
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| 182 | call calc_region_properties(nlev,nregions,istartcol,iendcol, & |
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| 183 | & config%i_cloud_pdf_shape == IPdfShapeGamma, & |
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| 184 | & cloud%fraction, cloud%fractional_std, region_fracs, & |
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| 185 | & od_scaling, config%cloud_fraction_threshold) |
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| 186 | |
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| 187 | ! Compute wavelength-independent overlap matrices u_matrix and |
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| 188 | ! v_matrix |
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| 189 | call calc_overlap_matrices(nlev,nregions,istartcol,iendcol, & |
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| 190 | & region_fracs, cloud%overlap_param, & |
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| 191 | & u_matrix, v_matrix, & |
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| 192 | & decorrelation_scaling=config%cloud_inhom_decorr_scaling, & |
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| 193 | & cloud_fraction_threshold=config%cloud_fraction_threshold, & |
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| 194 | & use_beta_overlap=config%use_beta_overlap, & |
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| 195 | & cloud_cover=flux%cloud_cover_sw) |
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| 196 | |
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| 197 | ! Main loop over columns |
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| 198 | do jcol = istartcol, iendcol |
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| 199 | ! -------------------------------------------------------- |
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| 200 | ! Section 2: Prepare column-specific variables and arrays |
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| 201 | ! -------------------------------------------------------- |
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| 202 | |
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| 203 | ! Copy local cosine of the solar zenith angle |
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| 204 | mu0 = single_level%cos_sza(jcol) |
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| 205 | |
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| 206 | ! Skip profile if sun is too low in the sky |
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| 207 | if (mu0 < 1.0e-10_jprb) then |
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| 208 | flux%sw_dn(jcol,:) = 0.0_jprb |
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| 209 | flux%sw_up(jcol,:) = 0.0_jprb |
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| 210 | if (allocated(flux%sw_dn_direct)) then |
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| 211 | flux%sw_dn_direct(jcol,:) = 0.0_jprb |
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| 212 | end if |
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| 213 | if (config%do_clear) then |
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| 214 | flux%sw_dn_clear(jcol,:) = 0.0_jprb |
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| 215 | flux%sw_up_clear(jcol,:) = 0.0_jprb |
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| 216 | if (allocated(flux%sw_dn_direct_clear)) then |
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| 217 | flux%sw_dn_direct_clear(jcol,:) = 0.0_jprb |
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| 218 | end if |
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| 219 | end if |
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| 220 | |
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| 221 | if (config%do_save_spectral_flux) then |
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| 222 | flux%sw_dn_band(:,jcol,:) = 0.0_jprb |
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| 223 | flux%sw_up_band(:,jcol,:) = 0.0_jprb |
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| 224 | if (allocated(flux%sw_dn_direct_band)) then |
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| 225 | flux%sw_dn_direct_band(:,jcol,:) = 0.0_jprb |
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| 226 | end if |
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| 227 | if (config%do_clear) then |
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| 228 | flux%sw_dn_clear_band(:,jcol,:) = 0.0_jprb |
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| 229 | flux%sw_up_clear_band(:,jcol,:) = 0.0_jprb |
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| 230 | if (allocated(flux%sw_dn_direct_clear_band)) then |
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| 231 | flux%sw_dn_direct_clear_band(:,jcol,:) = 0.0_jprb |
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| 232 | end if |
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| 233 | end if |
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| 234 | end if |
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| 235 | |
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| 236 | flux%sw_dn_diffuse_surf_g(:,jcol) = 0.0_jprb |
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| 237 | flux%sw_dn_direct_surf_g(:,jcol) = 0.0_jprb |
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| 238 | if (config%do_clear) then |
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| 239 | flux%sw_dn_diffuse_surf_clear_g(:,jcol) = 0.0_jprb |
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| 240 | flux%sw_dn_direct_surf_clear_g(:,jcol) = 0.0_jprb |
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| 241 | end if |
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| 242 | |
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| 243 | cycle |
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| 244 | end if ! sun is below the horizon |
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| 245 | |
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| 246 | ! At this point mu0 >= 1.0e-10 |
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| 247 | |
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| 248 | ! Define which layers contain cloud; assume that |
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| 249 | ! cloud%crop_cloud_fraction has already been called |
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| 250 | is_clear_sky_layer = .true. |
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| 251 | do jlev = 1,nlev |
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| 252 | if (cloud%fraction(jcol,jlev) > 0.0_jprb) then |
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| 253 | is_clear_sky_layer(jlev) = .false. |
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| 254 | end if |
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| 255 | end do |
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| 256 | |
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| 257 | ! -------------------------------------------------------- |
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| 258 | ! Section 3: Loop over layers to compute reflectance and transmittance |
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| 259 | ! -------------------------------------------------------- |
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| 260 | ! In this section the reflectance, transmittance and sources |
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| 261 | ! are computed for each layer |
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| 262 | do jlev = 1,nlev ! Start at top-of-atmosphere |
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| 263 | |
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| 264 | ! Array-wise assignments |
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| 265 | gamma1 = 0.0_jprb |
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| 266 | gamma2 = 0.0_jprb |
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| 267 | gamma3 = 0.0_jprb |
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| 268 | |
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| 269 | nreg = nregions |
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| 270 | if (is_clear_sky_layer(jlev)) then |
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| 271 | nreg = 1 |
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| 272 | end if |
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| 273 | do jreg = 1,nreg |
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| 274 | if (jreg == 1) then |
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| 275 | od_total = od(:,jlev,jcol) |
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| 276 | ssa_total = ssa(:,jlev,jcol) |
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| 277 | g_total = g(:,jlev,jcol) |
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| 278 | else |
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| 279 | do jg = 1,ng |
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| 280 | ! Mapping from g-point to band |
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| 281 | iband = config%i_band_from_reordered_g_sw(jg) |
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| 282 | scat_od = od(jg,jlev,jcol)*ssa(jg,jlev,jcol) |
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| 283 | scat_od_cloud = od_cloud(iband,jlev,jcol) & |
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| 284 | & * ssa_cloud(iband,jlev,jcol) * od_scaling(jreg,jlev,jcol) |
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| 285 | ! Add scaled cloud optical depth to clear-sky value |
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| 286 | od_total(jg) = od(jg,jlev,jcol) & |
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| 287 | & + od_cloud(iband,jlev,jcol)*od_scaling(jreg,jlev,jcol) |
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| 288 | ! Compute single-scattering albedo and asymmetry |
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| 289 | ! factor of gas-cloud combination |
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| 290 | ssa_total(jg) = (scat_od+scat_od_cloud) & |
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| 291 | & / od_total(jg) |
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| 292 | g_total(jg) = (scat_od*g(jg,jlev,jcol) & |
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| 293 | & + scat_od_cloud * g_cloud(iband,jlev,jcol)) & |
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| 294 | & / (scat_od + scat_od_cloud) |
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| 295 | end do |
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| 296 | end if |
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| 297 | |
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| 298 | if (config%do_sw_delta_scaling_with_gases) then |
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| 299 | ! Apply delta-Eddington scaling to the aerosol-gas(-cloud) |
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| 300 | ! mixture |
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| 301 | call delta_eddington(od_total, ssa_total, g_total) |
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| 302 | end if |
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| 303 | call calc_two_stream_gammas_sw(ng, & |
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| 304 | & mu0, ssa_total, g_total, & |
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| 305 | & gamma1, gamma2, gamma3) |
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| 306 | call calc_reflectance_transmittance_sw(ng, & |
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| 307 | & mu0, od_total, ssa_total, & |
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| 308 | & gamma1, gamma2, gamma3, & |
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| 309 | & reflectance(:,jreg,jlev), transmittance(:,jreg,jlev), & |
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| 310 | & ref_dir(:,jreg,jlev), trans_dir_diff(:,jreg,jlev), & |
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| 311 | & trans_dir_dir(:,jreg,jlev) ) |
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| 312 | end do |
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| 313 | end do |
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| 314 | |
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| 315 | ! -------------------------------------------------------- |
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| 316 | ! Section 4: Compute total albedos |
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| 317 | ! -------------------------------------------------------- |
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| 318 | |
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| 319 | total_albedo(:,:,:) = 0.0_jprb |
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| 320 | total_albedo_direct(:,:,:) = 0.0_jprb |
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| 321 | |
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| 322 | ! Copy surface albedo in clear-sky region |
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| 323 | do jg = 1,ng |
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| 324 | total_albedo(jg,1,nlev+1) = albedo_diffuse(jg,jcol) |
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| 325 | end do |
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| 326 | |
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| 327 | ! If direct albedo is available, use it; otherwise copy from |
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| 328 | ! diffuse albedo |
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| 329 | do jg = 1,ng |
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| 330 | total_albedo_direct(jg,1,nlev+1) & |
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| 331 | & = mu0 * albedo_direct(jg,jcol) |
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| 332 | end do |
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| 333 | |
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| 334 | ! If there is cloud in the lowest layer then we need the albedos |
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| 335 | ! underneath |
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| 336 | if (.not. is_clear_sky_layer(nlev)) then |
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| 337 | do jreg = 2,nregions |
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| 338 | total_albedo(:,jreg,nlev+1) = total_albedo(:,1,nlev+1) |
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| 339 | total_albedo_direct(:,jreg,nlev+1) = total_albedo_direct(:,1,nlev+1) |
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| 340 | end do |
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| 341 | end if |
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| 342 | |
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| 343 | if (config%do_clear) then |
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| 344 | total_albedo_clear(:,nlev+1) = total_albedo(:,1,nlev+1) |
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| 345 | total_albedo_clear_direct(:,nlev+1) = total_albedo_direct(:,1,nlev+1) |
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| 346 | end if |
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| 347 | |
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| 348 | ! Work up from the surface computing the total albedo of the |
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| 349 | ! atmosphere below that point using the adding method |
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| 350 | do jlev = nlev,1,-1 |
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| 351 | |
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| 352 | total_albedo_below = 0.0_jprb |
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| 353 | total_albedo_below_direct = 0.0_jprb |
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| 354 | |
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| 355 | if (config%do_clear) then |
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| 356 | ! For clear-skies there is no need to consider "above" and |
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| 357 | ! "below" quantities since with no cloud overlap to worry |
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| 358 | ! about, these are the same |
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| 359 | do jg = 1,ng |
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| 360 | inv_denom(jg,1) = 1.0_jprb & |
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| 361 | & / (1.0_jprb - total_albedo_clear(jg,jlev+1)*reflectance(jg,1,jlev)) |
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| 362 | total_albedo_clear(jg,jlev) = reflectance(jg,1,jlev) & |
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| 363 | & + transmittance(jg,1,jlev) * transmittance(jg,1,jlev) & |
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| 364 | & * total_albedo_clear(jg,jlev+1) * inv_denom(jg,1) |
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| 365 | total_albedo_clear_direct(jg,jlev) = ref_dir(jg,1,jlev) & |
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| 366 | & + (trans_dir_dir(jg,1,jlev)*total_albedo_clear_direct(jg,jlev+1) & |
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| 367 | & +trans_dir_diff(jg,1,jlev)*total_albedo_clear(jg,jlev+1)) & |
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| 368 | & * transmittance(jg,1,jlev) * inv_denom(jg,1) |
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| 369 | end do |
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| 370 | end if |
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| 371 | |
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| 372 | if (is_clear_sky_layer(jlev)) then |
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| 373 | do jg = 1,ng |
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| 374 | inv_denom(jg,1) = 1.0_jprb & |
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| 375 | & / (1.0_jprb - total_albedo(jg,1,jlev+1)*reflectance(jg,1,jlev)) |
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| 376 | total_albedo_below(jg,1) = reflectance(jg,1,jlev) & |
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| 377 | & + transmittance(jg,1,jlev) * transmittance(jg,1,jlev) & |
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| 378 | & * total_albedo(jg,1,jlev+1) * inv_denom(jg,1) |
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| 379 | total_albedo_below_direct(jg,1) = ref_dir(jg,1,jlev) & |
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| 380 | & + (trans_dir_dir(jg,1,jlev)*total_albedo_direct(jg,1,jlev+1) & |
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| 381 | & +trans_dir_diff(jg,1,jlev)*total_albedo(jg,1,jlev+1)) & |
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| 382 | & * transmittance(jg,1,jlev) * inv_denom(jg,1) |
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| 383 | end do |
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| 384 | else |
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| 385 | inv_denom = 1.0_jprb / (1.0_jprb - total_albedo(:,:,jlev+1)*reflectance(:,:,jlev)) |
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| 386 | total_albedo_below = reflectance(:,:,jlev) & |
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| 387 | & + transmittance(:,:,jlev) * transmittance(:,:,jlev) & |
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| 388 | & * total_albedo(:,:,jlev+1) * inv_denom |
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| 389 | total_albedo_below_direct = ref_dir(:,:,jlev) & |
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| 390 | & + (trans_dir_dir(:,:,jlev)*total_albedo_direct(:,:,jlev+1) & |
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| 391 | & +trans_dir_diff(:,:,jlev)*total_albedo(:,:,jlev+1)) & |
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| 392 | & * transmittance(:,:,jlev) * inv_denom |
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| 393 | end if |
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| 394 | |
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| 395 | ! Account for cloud overlap when converting albedo below a |
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| 396 | ! layer interface to the equivalent values just above |
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| 397 | if (is_clear_sky_layer(jlev) .and. is_clear_sky_layer(jlev-1)) then |
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| 398 | total_albedo(:,:,jlev) = total_albedo_below(:,:) |
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| 399 | total_albedo_direct(:,:,jlev) = total_albedo_below_direct(:,:) |
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| 400 | else |
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| 401 | ! Use overlap matrix and exclude "anomalous" horizontal |
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| 402 | ! transport described by Shonk & Hogan (2008). Therefore, |
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| 403 | ! the operation we perform is essentially diag(total_albedo) |
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| 404 | ! = matmul(transpose(v_matrix)), diag(total_albedo_below)). |
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| 405 | do jreg = 1,nregions |
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| 406 | do jreg2 = 1,nregions |
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| 407 | total_albedo(:,jreg,jlev) & |
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| 408 | & = total_albedo(:,jreg,jlev) & |
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| 409 | & + total_albedo_below(:,jreg2) & |
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| 410 | & * v_matrix(jreg2,jreg,jlev,jcol) |
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| 411 | total_albedo_direct(:,jreg,jlev) & |
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| 412 | & = total_albedo_direct(:,jreg,jlev) & |
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| 413 | & + total_albedo_below_direct(:,jreg2) & |
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| 414 | & * v_matrix(jreg2,jreg,jlev,jcol) |
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| 415 | end do |
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| 416 | end do |
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| 417 | |
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| 418 | end if |
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| 419 | |
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| 420 | end do ! Reverse loop over levels |
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| 421 | |
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| 422 | ! -------------------------------------------------------- |
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| 423 | ! Section 5: Compute fluxes |
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| 424 | ! -------------------------------------------------------- |
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| 425 | |
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| 426 | ! Top-of-atmosphere fluxes into the regions of the top-most |
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| 427 | ! layer, zero since we assume no diffuse downwelling |
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| 428 | flux_dn = 0.0_jprb |
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| 429 | ! Direct downwelling flux (into a plane perpendicular to the |
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| 430 | ! sun) entering the top of each region in the top-most layer |
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| 431 | do jreg = 1,nregions |
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| 432 | direct_dn(:,jreg) = incoming_sw(:,jcol)*region_fracs(jreg,1,jcol) |
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| 433 | end do |
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| 434 | flux_up = direct_dn*total_albedo_direct(:,:,1) |
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| 435 | |
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| 436 | if (config%do_clear) then |
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| 437 | flux_dn_clear = 0.0_jprb |
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| 438 | direct_dn_clear(:) = incoming_sw(:,jcol) |
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| 439 | flux_up_clear = direct_dn_clear*total_albedo_clear_direct(:,1) |
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| 440 | end if |
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| 441 | |
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| 442 | ! Store the TOA broadband fluxes |
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| 443 | flux%sw_up(jcol,1) = sum(sum(flux_up,1)) |
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| 444 | flux%sw_dn(jcol,1) = mu0 * sum(sum(direct_dn,1)) |
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| 445 | if (allocated(flux%sw_dn_direct)) then |
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| 446 | flux%sw_dn_direct(jcol,1) = flux%sw_dn(jcol,1) |
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| 447 | end if |
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| 448 | if (config%do_clear) then |
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| 449 | flux%sw_up_clear(jcol,1) = sum(flux_up_clear) |
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| 450 | flux%sw_dn_clear(jcol,1) = mu0 * sum(direct_dn_clear) |
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| 451 | if (allocated(flux%sw_dn_direct_clear)) then |
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| 452 | flux%sw_dn_direct_clear(jcol,1) = flux%sw_dn_clear(jcol,1) |
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| 453 | end if |
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| 454 | end if |
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| 455 | |
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| 456 | ! Save the spectral fluxes if required; some redundancy here as |
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| 457 | ! the TOA downwelling flux is the same in clear and cloudy skies |
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| 458 | if (config%do_save_spectral_flux) then |
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| 459 | call indexed_sum(sum(flux_up,2), & |
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| 460 | & config%i_spec_from_reordered_g_sw, & |
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| 461 | & flux%sw_up_band(:,jcol,1)) |
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| 462 | call indexed_sum(sum(direct_dn,2), & |
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| 463 | & config%i_spec_from_reordered_g_sw, & |
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| 464 | & flux%sw_dn_band(:,jcol,1)) |
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| 465 | flux%sw_dn_band(:,jcol,1) = & |
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| 466 | & mu0 * flux%sw_dn_band(:,jcol,1) |
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| 467 | if (allocated(flux%sw_dn_direct_band)) then |
|---|
| 468 | flux%sw_dn_direct_band(:,jcol,1) = flux%sw_dn_band(:,jcol,1) |
|---|
| 469 | end if |
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| 470 | call add_indexed_sum(sum(flux_dn,2), & |
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| 471 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 472 | & flux%sw_dn_band(:,jcol,1)) |
|---|
| 473 | if (config%do_clear) then |
|---|
| 474 | call indexed_sum(flux_up_clear, & |
|---|
| 475 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 476 | & flux%sw_up_clear_band(:,jcol,1)) |
|---|
| 477 | call indexed_sum(direct_dn_clear, & |
|---|
| 478 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 479 | & flux%sw_dn_clear_band(:,jcol,1)) |
|---|
| 480 | flux%sw_dn_clear_band(:,jcol,1) & |
|---|
| 481 | & = mu0 * flux%sw_dn_clear_band(:,jcol,1) |
|---|
| 482 | if (allocated(flux%sw_dn_direct_clear_band)) then |
|---|
| 483 | flux%sw_dn_direct_clear_band(:,jcol,1) & |
|---|
| 484 | & = flux%sw_dn_clear_band(:,jcol,1) |
|---|
| 485 | end if |
|---|
| 486 | call add_indexed_sum(flux_dn_clear, & |
|---|
| 487 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 488 | & flux%sw_dn_clear_band(:,jcol,1)) |
|---|
| 489 | end if |
|---|
| 490 | end if |
|---|
| 491 | |
|---|
| 492 | ! Final loop back down through the atmosphere to compute fluxes |
|---|
| 493 | do jlev = 1,nlev |
|---|
| 494 | if (config%do_clear) then |
|---|
| 495 | do jg = 1,ng |
|---|
| 496 | flux_dn_clear(jg) = (transmittance(jg,1,jlev)*flux_dn_clear(jg) + direct_dn_clear(jg) & |
|---|
| 497 | & * (trans_dir_dir(jg,1,jlev)*total_albedo_clear_direct(jg,jlev+1)*reflectance(jg,1,jlev) & |
|---|
| 498 | & + trans_dir_diff(jg,1,jlev) )) & |
|---|
| 499 | & / (1.0_jprb - reflectance(jg,1,jlev)*total_albedo_clear(jg,jlev+1)) |
|---|
| 500 | direct_dn_clear(jg) = trans_dir_dir(jg,1,jlev)*direct_dn_clear(jg) |
|---|
| 501 | flux_up_clear(jg) = direct_dn_clear(jg)*total_albedo_clear_direct(jg,jlev+1) & |
|---|
| 502 | & + flux_dn_clear(jg)*total_albedo_clear(jg,jlev+1) |
|---|
| 503 | end do |
|---|
| 504 | end if |
|---|
| 505 | |
|---|
| 506 | if (is_clear_sky_layer(jlev)) then |
|---|
| 507 | do jg = 1,ng |
|---|
| 508 | flux_dn(jg,1) = (transmittance(jg,1,jlev)*flux_dn(jg,1) + direct_dn(jg,1) & |
|---|
| 509 | & * (trans_dir_dir(jg,1,jlev)*total_albedo_direct(jg,1,jlev+1)*reflectance(jg,1,jlev) & |
|---|
| 510 | & + trans_dir_diff(jg,1,jlev) )) & |
|---|
| 511 | & / (1.0_jprb - reflectance(jg,1,jlev)*total_albedo(jg,1,jlev+1)) |
|---|
| 512 | direct_dn(jg,1) = trans_dir_dir(jg,1,jlev)*direct_dn(jg,1) |
|---|
| 513 | flux_up(jg,1) = direct_dn(jg,1)*total_albedo_direct(jg,1,jlev+1) & |
|---|
| 514 | & + flux_dn(jg,1)*total_albedo(jg,1,jlev+1) |
|---|
| 515 | end do |
|---|
| 516 | |
|---|
| 517 | flux_dn(:,2:) = 0.0_jprb |
|---|
| 518 | flux_up(:,2:) = 0.0_jprb |
|---|
| 519 | direct_dn(:,2:)= 0.0_jprb |
|---|
| 520 | else |
|---|
| 521 | flux_dn = (transmittance(:,:,jlev)*flux_dn + direct_dn & |
|---|
| 522 | & * (trans_dir_dir(:,:,jlev)*total_albedo_direct(:,:,jlev+1)*reflectance(:,:,jlev) & |
|---|
| 523 | & + trans_dir_diff(:,:,jlev) )) & |
|---|
| 524 | & / (1.0_jprb - reflectance(:,:,jlev)*total_albedo(:,:,jlev+1)) |
|---|
| 525 | direct_dn = trans_dir_dir(:,:,jlev)*direct_dn |
|---|
| 526 | flux_up = direct_dn*total_albedo_direct(:,:,jlev+1) & |
|---|
| 527 | & + flux_dn*total_albedo(:,:,jlev+1) |
|---|
| 528 | end if |
|---|
| 529 | |
|---|
| 530 | if (.not. (is_clear_sky_layer(jlev) & |
|---|
| 531 | & .and. is_clear_sky_layer(jlev+1))) then |
|---|
| 532 | ! Account for overlap rules in translating fluxes just above |
|---|
| 533 | ! a layer interface to the values just below |
|---|
| 534 | flux_dn_below = singlemat_x_vec(ng,ng,nregions, & |
|---|
| 535 | & v_matrix(:,:,jlev+1,jcol), flux_dn) |
|---|
| 536 | direct_dn_below = singlemat_x_vec(ng,ng,nregions, & |
|---|
| 537 | & v_matrix(:,:,jlev+1,jcol), direct_dn) |
|---|
| 538 | flux_dn = flux_dn_below |
|---|
| 539 | direct_dn = direct_dn_below |
|---|
| 540 | end if ! Otherwise the fluxes in each region are the same so |
|---|
| 541 | ! nothing to do |
|---|
| 542 | |
|---|
| 543 | ! Store the broadband fluxes |
|---|
| 544 | flux%sw_up(jcol,jlev+1) = sum(sum(flux_up,1)) |
|---|
| 545 | if (allocated(flux%sw_dn_direct)) then |
|---|
| 546 | flux%sw_dn_direct(jcol,jlev+1) = mu0 * sum(sum(direct_dn,1)) |
|---|
| 547 | flux%sw_dn(jcol,jlev+1) & |
|---|
| 548 | & = flux%sw_dn_direct(jcol,jlev+1) + sum(sum(flux_dn,1)) |
|---|
| 549 | else |
|---|
| 550 | flux%sw_dn(jcol,jlev+1) = mu0 * sum(sum(direct_dn,1)) + sum(sum(flux_dn,1)) |
|---|
| 551 | end if |
|---|
| 552 | if (config%do_clear) then |
|---|
| 553 | flux%sw_up_clear(jcol,jlev+1) = sum(flux_up_clear) |
|---|
| 554 | if (allocated(flux%sw_dn_direct_clear)) then |
|---|
| 555 | flux%sw_dn_direct_clear(jcol,jlev+1) = mu0 * sum(direct_dn_clear) |
|---|
| 556 | flux%sw_dn_clear(jcol,jlev+1) & |
|---|
| 557 | & = flux%sw_dn_direct_clear(jcol,jlev+1) + sum(flux_dn_clear) |
|---|
| 558 | else |
|---|
| 559 | flux%sw_dn_clear(jcol,jlev+1) = mu0 * sum(direct_dn_clear) & |
|---|
| 560 | & + sum(flux_dn_clear) |
|---|
| 561 | end if |
|---|
| 562 | end if |
|---|
| 563 | |
|---|
| 564 | ! Save the spectral fluxes if required |
|---|
| 565 | if (config%do_save_spectral_flux) then |
|---|
| 566 | call indexed_sum(sum(flux_up,2), & |
|---|
| 567 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 568 | & flux%sw_up_band(:,jcol,jlev+1)) |
|---|
| 569 | call indexed_sum(sum(direct_dn,2), & |
|---|
| 570 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 571 | & flux%sw_dn_band(:,jcol,jlev+1)) |
|---|
| 572 | flux%sw_dn_band(:,jcol,jlev+1) = & |
|---|
| 573 | & mu0 * flux%sw_dn_band(:,jcol,jlev+1) |
|---|
| 574 | if (allocated(flux%sw_dn_direct_band)) then |
|---|
| 575 | flux%sw_dn_direct_band(:,jcol,jlev+1) & |
|---|
| 576 | & = flux%sw_dn_band(:,jcol,jlev+1) |
|---|
| 577 | end if |
|---|
| 578 | call add_indexed_sum(sum(flux_dn,2), & |
|---|
| 579 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 580 | & flux%sw_dn_band(:,jcol,jlev+1)) |
|---|
| 581 | if (config%do_clear) then |
|---|
| 582 | call indexed_sum(flux_up_clear, & |
|---|
| 583 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 584 | & flux%sw_up_clear_band(:,jcol,jlev+1)) |
|---|
| 585 | call indexed_sum(direct_dn_clear, & |
|---|
| 586 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 587 | & flux%sw_dn_clear_band(:,jcol,jlev+1)) |
|---|
| 588 | flux%sw_dn_clear_band(:,jcol,jlev+1) = & |
|---|
| 589 | & mu0 * flux%sw_dn_clear_band(:,jcol,jlev+1) |
|---|
| 590 | if (allocated(flux%sw_dn_direct_clear_band)) then |
|---|
| 591 | flux%sw_dn_direct_clear_band(:,jcol,jlev+1) & |
|---|
| 592 | & = flux%sw_dn_clear_band(:,jcol,jlev+1) |
|---|
| 593 | end if |
|---|
| 594 | call add_indexed_sum(flux_dn_clear, & |
|---|
| 595 | & config%i_spec_from_reordered_g_sw, & |
|---|
| 596 | & flux%sw_dn_clear_band(:,jcol,jlev+1)) |
|---|
| 597 | end if |
|---|
| 598 | end if |
|---|
| 599 | |
|---|
| 600 | end do ! Final loop over levels |
|---|
| 601 | |
|---|
| 602 | ! Store surface spectral fluxes, if required (after the end of |
|---|
| 603 | ! the final loop over levels, the current values of these arrays |
|---|
| 604 | ! will be the surface values) |
|---|
| 605 | flux%sw_dn_diffuse_surf_g(:,jcol) = sum(flux_dn,2) |
|---|
| 606 | flux%sw_dn_direct_surf_g(:,jcol) = mu0 * sum(direct_dn,2) |
|---|
| 607 | if (config%do_clear) then |
|---|
| 608 | flux%sw_dn_diffuse_surf_clear_g(:,jcol) = flux_dn_clear |
|---|
| 609 | flux%sw_dn_direct_surf_clear_g(:,jcol) = mu0 * direct_dn_clear |
|---|
| 610 | end if |
|---|
| 611 | |
|---|
| 612 | end do ! Loop over columns |
|---|
| 613 | |
|---|
| 614 | if (lhook) call dr_hook('radiation_tripleclouds_sw:solver_tripleclouds_sw',1,hook_handle) |
|---|
| 615 | |
|---|
| 616 | end subroutine solver_tripleclouds_sw |
|---|
| 617 | |
|---|
| 618 | end module radiation_tripleclouds_sw |
|---|
