| 1 | ! radiation_ecckd.F90 - ecCKD generalized gas optics model |
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| 2 | |
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| 3 | ! (C) Copyright 2020- 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 | ! License: see the COPYING file for details |
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| 15 | ! |
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| 16 | |
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| 17 | module radiation_ecckd |
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| 18 | |
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| 19 | use parkind1, only : jprb |
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| 20 | use radiation_gas_constants |
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| 21 | use radiation_ecckd_gas |
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| 22 | use radiation_spectral_definition, only : spectral_definition_type |
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| 23 | |
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| 24 | implicit none |
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| 25 | |
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| 26 | public |
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| 27 | |
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| 28 | !--------------------------------------------------------------------- |
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| 29 | ! This derived type contains all the data needed to describe a |
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| 30 | ! correlated k-distribution gas optics model created using the ecCKD |
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| 31 | ! tool |
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| 32 | type ckd_model_type |
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| 33 | |
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| 34 | ! Gas information |
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| 35 | |
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| 36 | ! Number of gases |
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| 37 | integer :: ngas = 0 |
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| 38 | ! Array of individual-gas data objects |
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| 39 | type(ckd_gas_type), allocatable :: single_gas(:) |
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| 40 | ! Mapping from the "gas codes" in the radiation_gas_constants |
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| 41 | ! module to an index to the single_gas array, where zero means gas |
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| 42 | ! not present (or part of a composite gas) |
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| 43 | integer :: i_gas_mapping(0:NMaxGases) |
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| 44 | |
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| 45 | ! Coordinates of main look-up table for absorption coeffts |
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| 46 | |
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| 47 | ! Number of pressure and temperature points |
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| 48 | integer :: npress = 0 |
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| 49 | integer :: ntemp = 0 |
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| 50 | ! Natural logarithm of first (lowest) pressure (Pa) and increment |
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| 51 | real(jprb) :: log_pressure1, d_log_pressure |
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| 52 | ! First temperature profile (K), dimensioned (npress) |
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| 53 | real(jprb), allocatable :: temperature1(:) |
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| 54 | ! Temperature increment (K) |
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| 55 | real(jprb) :: d_temperature |
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| 56 | |
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| 57 | ! Look-up table for Planck function |
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| 58 | |
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| 59 | ! Number of entries |
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| 60 | integer :: nplanck = 0 |
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| 61 | ! Temperature of first element of look-up table and increment (K) |
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| 62 | real(jprb), allocatable :: temperature1_planck |
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| 63 | real(jprb), allocatable :: d_temperature_planck |
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| 64 | ! Planck function (black body flux into a horizontal plane) in W |
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| 65 | ! m-2, dimensioned (ng,nplanck) |
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| 66 | real(jprb), allocatable :: planck_function(:,:) |
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| 67 | |
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| 68 | ! Normalized solar irradiance in each g point dimensioned (ng) |
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| 69 | real(jprb), allocatable :: norm_solar_irradiance(:) |
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| 70 | |
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| 71 | ! Rayleigh molar scattering coefficient in m2 mol-1 in each g |
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| 72 | ! point |
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| 73 | real(jprb), allocatable :: rayleigh_molar_scat(:) |
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| 74 | |
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| 75 | ! ! Spectral mapping of g points |
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| 76 | |
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| 77 | ! ! Number of wavenumber intervals |
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| 78 | ! integer :: nwav = 0 |
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| 79 | |
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| 80 | ! Number of k terms / g points |
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| 81 | integer :: ng = 0 |
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| 82 | |
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| 83 | ! Spectral definition describing bands and g points |
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| 84 | type(spectral_definition_type) :: spectral_def |
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| 85 | |
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| 86 | ! Shortwave: true, longwave: false |
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| 87 | logical :: is_sw |
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| 88 | |
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| 89 | contains |
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| 90 | |
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| 91 | procedure :: read => read_ckd_model |
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| 92 | procedure :: calc_optical_depth => calc_optical_depth_ckd_model |
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| 93 | procedure :: print => print_ckd_model |
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| 94 | procedure :: calc_planck_function |
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| 95 | procedure :: calc_incoming_sw |
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| 96 | ! procedure :: deallocate => deallocate_ckd_model |
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| 97 | |
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| 98 | end type ckd_model_type |
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| 99 | |
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| 100 | |
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| 101 | contains |
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| 102 | |
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| 103 | !--------------------------------------------------------------------- |
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| 104 | ! Read a complete ecCKD gas optics model from a NetCDF file |
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| 105 | ! "filename" |
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| 106 | subroutine read_ckd_model(this, filename, iverbose) |
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| 107 | |
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| 108 | use easy_netcdf, only : netcdf_file |
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| 109 | !use radiation_io, only : nulerr, radiation_abort |
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| 110 | use yomhook, only : lhook, dr_hook |
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| 111 | |
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| 112 | class(ckd_model_type), intent(inout) :: this |
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| 113 | character(len=*), intent(in) :: filename |
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| 114 | integer, optional, intent(in) :: iverbose |
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| 115 | |
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| 116 | type(netcdf_file) :: file |
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| 117 | |
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| 118 | real(jprb), allocatable :: pressure_lut(:) |
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| 119 | real(jprb), allocatable :: temperature_full(:,:) |
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| 120 | real(jprb), allocatable :: temperature_planck(:) |
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| 121 | |
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| 122 | character(len=512) :: constituent_id |
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| 123 | |
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| 124 | integer :: iverbose_local |
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| 125 | |
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| 126 | ! Loop counters |
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| 127 | integer :: jgas, jjgas |
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| 128 | |
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| 129 | integer :: istart, inext, nchar, i_gas_code |
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| 130 | |
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| 131 | real(jprb) :: hook_handle |
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| 132 | |
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| 133 | if (lhook) call dr_hook('radiation_ecckd:read_ckd_model',0,hook_handle) |
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| 134 | |
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| 135 | if (present(iverbose)) then |
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| 136 | iverbose_local = iverbose |
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| 137 | else |
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| 138 | iverbose_local = 3 |
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| 139 | end if |
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| 140 | |
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| 141 | call file%open(trim(filename), iverbose=iverbose_local) |
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| 142 | |
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| 143 | ! Read temperature and pressure coordinate variables |
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| 144 | call file%get('pressure', pressure_lut) |
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| 145 | this%log_pressure1 = log(pressure_lut(1)) |
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| 146 | this%npress = size(pressure_lut) |
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| 147 | this%d_log_pressure = log(pressure_lut(2)) - this%log_pressure1 |
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| 148 | call file%get('temperature', temperature_full) |
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| 149 | if (allocated(this%temperature1)) deallocate(this%temperature1) |
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| 150 | allocate(this%temperature1(this%npress)); |
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| 151 | this%temperature1 = temperature_full(:,1) |
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| 152 | this%d_temperature = temperature_full(1,2)-temperature_full(1,1) |
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| 153 | this%ntemp = size(temperature_full,2) |
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| 154 | deallocate(temperature_full) |
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| 155 | |
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| 156 | ! Read Planck function, or solar irradiance and Rayleigh |
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| 157 | ! scattering coefficient |
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| 158 | if (file%exists('solar_irradiance')) then |
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| 159 | this%is_sw = .true. |
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| 160 | call file%get('solar_irradiance', this%norm_solar_irradiance) |
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| 161 | this%norm_solar_irradiance = this%norm_solar_irradiance & |
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| 162 | & / sum(this%norm_solar_irradiance) |
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| 163 | call file%get('rayleigh_molar_scattering_coeff', & |
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| 164 | & this%rayleigh_molar_scat) |
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| 165 | else |
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| 166 | this%is_sw = .false. |
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| 167 | call file%get('temperature_planck', temperature_planck) |
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| 168 | this%nplanck = size(temperature_planck) |
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| 169 | this%temperature1_planck = temperature_planck(1) |
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| 170 | this%d_temperature_planck = temperature_planck(2) - temperature_planck(1) |
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| 171 | deallocate(temperature_planck) |
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| 172 | call file%get('planck_function', this%planck_function) |
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| 173 | end if |
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| 174 | |
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| 175 | ! Read the spectral definition information into a separate |
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| 176 | ! derived type |
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| 177 | call this%spectral_def%read(file); |
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| 178 | this%ng = this%spectral_def%ng |
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| 179 | |
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| 180 | ! Read gases |
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| 181 | call file%get('n_gases', this%ngas) |
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| 182 | if (allocated(this%single_gas)) deallocate(this%single_gas) |
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| 183 | allocate(this%single_gas(this%ngas)) |
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| 184 | call file%get_global_attribute('constituent_id', constituent_id) |
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| 185 | nchar = len(trim(constituent_id)) |
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| 186 | istart = 1 |
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| 187 | this%i_gas_mapping = 0 |
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| 188 | DO jgas = 1, this%ngas |
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| 189 | if (jgas < this%ngas) then |
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| 190 | inext = istart + scan(constituent_id(istart:nchar), ' ') |
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| 191 | else |
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| 192 | inext = nchar+2 |
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| 193 | end if |
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| 194 | ! Find gas code |
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| 195 | i_gas_code = 0 |
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| 196 | DO jjgas = 1, NMaxGases |
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| 197 | if (constituent_id(istart:inext-2) == trim(GasLowerCaseName(jjgas))) then |
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| 198 | i_gas_code = jjgas |
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| 199 | exit |
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| 200 | end if |
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| 201 | end do |
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| 202 | ! if (i_gas_code == 0) then |
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| 203 | ! write(nulerr,'(a,a,a)') '*** Error: Gas "', constituent_id(istart:inext-2), & |
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| 204 | ! & '" not understood' |
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| 205 | ! call radiation_abort('Radiation configuration error') |
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| 206 | ! end if |
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| 207 | this%i_gas_mapping(i_gas_code) = jgas; |
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| 208 | call this%single_gas(jgas)%read(file, constituent_id(istart:inext-2), i_gas_code) |
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| 209 | istart = inext |
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| 210 | end do |
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| 211 | |
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| 212 | if (lhook) call dr_hook('radiation_ecckd:read_ckd_model',1,hook_handle) |
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| 213 | |
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| 214 | end subroutine read_ckd_model |
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| 215 | |
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| 216 | !--------------------------------------------------------------------- |
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| 217 | ! Print a description of the correlated k-distribution model to the |
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| 218 | ! "nulout" unit |
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| 219 | subroutine print_ckd_model(this) |
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| 220 | |
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| 221 | use radiation_io, only : nulout |
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| 222 | use radiation_gas_constants |
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| 223 | |
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| 224 | class(ckd_model_type), intent(in) :: this |
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| 225 | |
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| 226 | integer :: jgas |
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| 227 | |
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| 228 | if (this%is_sw) then |
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| 229 | write(nulout,'(a)',advance='no') 'ecCKD shortwave gas optics model: ' |
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| 230 | else |
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| 231 | write(nulout,'(a)',advance='no') 'ecCKD longwave gas optics model: ' |
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| 232 | end if |
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| 233 | |
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| 234 | write(nulout,'(i0,a,i0,a,i0,a,i0,a)') & |
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| 235 | & nint(this%spectral_def%wavenumber1(1)), '-', & |
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| 236 | & nint(this%spectral_def%wavenumber2(size(this%spectral_def%wavenumber2))), & |
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| 237 | & ' cm-1, ', this%ng, ' g-points in ', this%spectral_def%nband, ' bands' |
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| 238 | write(nulout,'(a,i0,a,i0,a,i0,a)') ' Look-up table sizes: ', this%npress, ' pressures, ', & |
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| 239 | & this%ntemp, ' temperatures, ', this%nplanck, ' planck-function entries' |
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| 240 | write(nulout, '(a)') ' Gases:' |
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| 241 | DO jgas = 1,this%ngas |
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| 242 | if (this%single_gas(jgas)%i_gas_code > 0) then |
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| 243 | write(nulout, '(a,a,a)', advance='no') ' ', & |
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| 244 | & trim(GasName(this%single_gas(jgas)%i_gas_code)), ': ' |
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| 245 | else |
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| 246 | write(nulout, '(a)', advance='no') ' Composite of well-mixed background gases: ' |
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| 247 | end if |
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| 248 | select case (this%single_gas(jgas)%i_conc_dependence) |
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| 249 | case (IConcDependenceNone) |
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| 250 | write(nulout, '(a)') 'no concentration dependence' |
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| 251 | case (IConcDependenceLinear) |
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| 252 | write(nulout, '(a)') 'linear concentration dependence' |
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| 253 | case (IConcDependenceRelativeLinear) |
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| 254 | write(nulout, '(a,e14.6)') 'linear concentration dependence relative to a mole fraction of ', & |
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| 255 | & this%single_gas(jgas)%reference_mole_frac |
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| 256 | case (IConcDependenceLUT) |
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| 257 | write(nulout, '(a,i0,a,e14.6,a,e13.6)') 'look-up table with ', this%single_gas(jgas)%n_mole_frac, & |
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| 258 | & ' log-spaced mole fractions in range ', exp(this%single_gas(jgas)%log_mole_frac1), & |
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| 259 | & ' to ', exp(this%single_gas(jgas)%log_mole_frac1 & |
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| 260 | & + this%single_gas(jgas)%n_mole_frac*this%single_gas(jgas)%d_log_mole_frac) |
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| 261 | end select |
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| 262 | end do |
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| 263 | |
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| 264 | end subroutine print_ckd_model |
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| 265 | |
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| 266 | |
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| 267 | !--------------------------------------------------------------------- |
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| 268 | ! Compute layerwise optical depth for each g point for ncol columns |
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| 269 | ! at nlev layers |
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| 270 | subroutine calc_optical_depth_ckd_model(this, ncol, nlev, istartcol, iendcol, nmaxgas, & |
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| 271 | & pressure_hl, temperature_fl, mole_fraction_fl, & |
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| 272 | & optical_depth_fl, rayleigh_od_fl) |
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| 273 | |
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| 274 | use yomhook, only : lhook, dr_hook |
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| 275 | use radiation_constants, only : AccelDueToGravity |
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| 276 | |
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| 277 | ! Input variables |
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| 278 | |
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| 279 | class(ckd_model_type), intent(in), target :: this |
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| 280 | ! Number of columns, levels and input gases |
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| 281 | integer, intent(in) :: ncol, nlev, nmaxgas, istartcol, iendcol |
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| 282 | ! Pressure at half levels (Pa), dimensioned (ncol,nlev+1) |
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| 283 | real(jprb), intent(in) :: pressure_hl(ncol,nlev+1) |
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| 284 | ! Temperature at full levels (K), dimensioned (ncol,nlev) |
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| 285 | real(jprb), intent(in) :: temperature_fl(istartcol:iendcol,nlev) |
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| 286 | ! Gas mole fractions at full levels (mol mol-1), dimensioned (ncol,nlev,nmaxgas) |
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| 287 | real(jprb), intent(in) :: mole_fraction_fl(ncol,nlev,nmaxgas) |
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| 288 | |
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| 289 | ! Output variables |
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| 290 | |
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| 291 | ! Layer absorption optical depth for each g point |
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| 292 | real(jprb), intent(out) :: optical_depth_fl(this%ng,nlev,istartcol:iendcol) |
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| 293 | ! In the shortwave only, the Rayleigh scattering optical depth |
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| 294 | real(jprb), optional, intent(out) :: rayleigh_od_fl(this%ng,nlev,istartcol:iendcol) |
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| 295 | |
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| 296 | ! Local variables |
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| 297 | |
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| 298 | real(jprb), pointer :: molar_abs(:,:,:), molar_abs_conc(:,:,:,:) |
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| 299 | |
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| 300 | ! Natural logarithm of pressure at full levels |
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| 301 | real(jprb) :: log_pressure_fl(nlev) |
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| 302 | |
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| 303 | ! Optical depth of single gas at one point in space versus |
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| 304 | ! spectral interval |
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| 305 | !real(jprb) :: od_single_gas(this%ng) |
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| 306 | |
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| 307 | real(jprb) :: multiplier(nlev), simple_multiplier(nlev), global_multiplier, temperature1 |
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| 308 | |
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| 309 | ! Indices and weights in temperature, pressure and concentration interpolation |
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| 310 | real(jprb) :: pindex1, tindex1, cindex1 |
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| 311 | real(jprb) :: pw1(nlev), pw2(nlev), tw1(nlev), tw2(nlev), cw1(nlev), cw2(nlev) |
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| 312 | integer :: ip1(nlev), it1(nlev), ic1(nlev) |
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| 313 | |
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| 314 | ! Natural logarithm of mole fraction at one point |
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| 315 | real(jprb) :: log_conc |
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| 316 | |
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| 317 | ! Minimum mole fraction in look-up-table |
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| 318 | real(jprb) :: mole_frac1 |
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| 319 | |
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| 320 | integer :: jcol, jlev, jgas, igascode |
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| 321 | |
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| 322 | real(jprb) :: hook_handle |
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| 323 | |
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| 324 | if (lhook) call dr_hook('radiation_ecckd:calc_optical_depth',0,hook_handle) |
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| 325 | |
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| 326 | global_multiplier = 1.0_jprb / (AccelDueToGravity * 0.001_jprb * AirMolarMass) |
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| 327 | |
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| 328 | DO jcol = istartcol,iendcol |
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| 329 | |
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| 330 | log_pressure_fl = log(0.5_jprb * (pressure_hl(jcol,1:nlev)+pressure_hl(jcol,2:nlev+1))) |
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| 331 | |
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| 332 | DO jlev = 1,nlev |
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| 333 | ! Find interpolation points in pressure |
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| 334 | pindex1 = (log_pressure_fl(jlev)-this%log_pressure1) & |
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| 335 | & / this%d_log_pressure |
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| 336 | pindex1 = 1.0_jprb + max(0.0_jprb, min(pindex1, this%npress-1.0001_jprb)) |
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| 337 | ip1(jlev) = int(pindex1) |
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| 338 | pw2(jlev) = pindex1 - ip1(jlev) |
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| 339 | pw1(jlev) = 1.0_jprb - pw2(jlev) |
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| 340 | |
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| 341 | ! Find interpolation points in temperature |
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| 342 | temperature1 = pw1(jlev)*this%temperature1(ip1(jlev)) & |
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| 343 | & + pw2(jlev)*this%temperature1(ip1(jlev)+1) |
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| 344 | tindex1 = (temperature_fl(jcol,jlev) - temperature1) & |
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| 345 | & / this%d_temperature |
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| 346 | tindex1 = 1.0_jprb + max(0.0_jprb, min(tindex1, this%ntemp-1.0001_jprb)) |
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| 347 | it1(jlev) = int(tindex1) |
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| 348 | tw2(jlev) = tindex1 - it1(jlev) |
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| 349 | tw1(jlev) = 1.0_jprb - tw2(jlev) |
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| 350 | |
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| 351 | ! Concentration multiplier |
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| 352 | simple_multiplier(jlev) = global_multiplier & |
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| 353 | & * (pressure_hl(jcol,jlev+1) - pressure_hl(jcol,jlev)) |
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| 354 | end do |
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| 355 | |
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| 356 | optical_depth_fl(:,:,jcol) = 0.0_jprb |
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| 357 | |
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| 358 | DO jgas = 1,this%ngas |
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| 359 | |
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| 360 | associate (single_gas => this%single_gas(jgas)) |
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| 361 | igascode = this%single_gas(jgas)%i_gas_code |
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| 362 | |
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| 363 | select case (single_gas%i_conc_dependence) |
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| 364 | |
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| 365 | case (IConcDependenceLinear) |
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| 366 | molar_abs => this%single_gas(jgas)%molar_abs |
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| 367 | multiplier = simple_multiplier * mole_fraction_fl(jcol,:,igascode) |
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| 368 | |
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| 369 | DO jlev = 1,nlev |
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| 370 | optical_depth_fl(:,jlev,jcol) = optical_depth_fl(:,jlev,jcol) & |
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| 371 | & + (multiplier(jlev)*tw1(jlev)) * (pw1(jlev) * molar_abs(:,ip1(jlev),it1(jlev)) & |
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| 372 | & +pw2(jlev) * molar_abs(:,ip1(jlev)+1,it1(jlev))) & |
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| 373 | & + (multiplier(jlev)*tw2(jlev)) * (pw1(jlev) * molar_abs(:,ip1(jlev),it1(jlev)+1) & |
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| 374 | & +pw2(jlev) * molar_abs(:,ip1(jlev)+1,it1(jlev)+1)) |
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| 375 | end do |
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| 376 | |
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| 377 | case (IConcDependenceRelativeLinear) |
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| 378 | molar_abs => this%single_gas(jgas)%molar_abs |
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| 379 | multiplier = simple_multiplier * (mole_fraction_fl(jcol,:,igascode) & |
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| 380 | & - single_gas%reference_mole_frac) |
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| 381 | DO jlev = 1,nlev |
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| 382 | optical_depth_fl(:,jlev,jcol) = optical_depth_fl(:,jlev,jcol) & |
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| 383 | & + (multiplier(jlev)*tw1(jlev)) * (pw1(jlev) * molar_abs(:,ip1(jlev),it1(jlev)) & |
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| 384 | & +pw2(jlev) * molar_abs(:,ip1(jlev)+1,it1(jlev))) & |
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| 385 | & + (multiplier(jlev)*tw2(jlev)) * (pw1(jlev) * molar_abs(:,ip1(jlev),it1(jlev)+1) & |
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| 386 | & +pw2(jlev) * molar_abs(:,ip1(jlev)+1,it1(jlev)+1)) |
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| 387 | end do |
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| 388 | |
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| 389 | case (IConcDependenceNone) |
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| 390 | ! Composite gases |
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| 391 | molar_abs => this%single_gas(jgas)%molar_abs |
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| 392 | DO jlev = 1,nlev |
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| 393 | optical_depth_fl(:,jlev,jcol) = optical_depth_fl(:,jlev,jcol) & |
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| 394 | & + (simple_multiplier(jlev)*tw1(jlev)) * (pw1(jlev) * molar_abs(:,ip1(jlev),it1(jlev)) & |
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| 395 | & +pw2(jlev) * molar_abs(:,ip1(jlev)+1,it1(jlev))) & |
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| 396 | & + (simple_multiplier(jlev)*tw2(jlev)) * (pw1(jlev) * molar_abs(:,ip1(jlev),it1(jlev)+1) & |
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| 397 | & +pw2(jlev) * molar_abs(:,ip1(jlev)+1,it1(jlev)+1)) |
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| 398 | end do |
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| 399 | |
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| 400 | case (IConcDependenceLUT) |
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| 401 | ! Logarithmic interpolation in concentration space |
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| 402 | molar_abs_conc => this%single_gas(jgas)%molar_abs_conc |
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| 403 | mole_frac1 = exp(single_gas%log_mole_frac1) |
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| 404 | DO jlev = 1,nlev |
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| 405 | ! Take care of mole_fraction == 0 |
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| 406 | log_conc = log(max(mole_fraction_fl(jcol,jlev,igascode), mole_frac1)) |
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| 407 | cindex1 = (log_conc - single_gas%log_mole_frac1) / single_gas%d_log_mole_frac |
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| 408 | cindex1 = 1.0_jprb + max(0.0_jprb, min(cindex1, single_gas%n_mole_frac-1.0001_jprb)) |
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| 409 | ic1(jlev) = int(cindex1) |
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| 410 | cw2(jlev) = cindex1 - ic1(jlev) |
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| 411 | cw1(jlev) = 1.0_jprb - cw2(jlev) |
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| 412 | end do |
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| 413 | ! od_single_gas = cw1 * (tw1 * (pw1 * molar_abs_conc(:,ip1,it1,ic1) & |
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| 414 | ! & +pw2 * molar_abs_conc(:,ip1+1,it1,ic1)) & |
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| 415 | ! & +tw2 * (pw1 * molar_abs_conc(:,ip1,it1+1,ic1) & |
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| 416 | ! & +pw2 * molar_abs_conc(:,ip1+1,it1+1,ic1))) & |
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| 417 | ! & +cw2 * (tw1 * (pw1 * molar_abs_conc(:,ip1,it1,ic1+1) & |
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| 418 | ! & +pw2 * molar_abs_conc(:,ip1+1,it1,ic1+1)) & |
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| 419 | ! & +tw2 * (pw1 * molar_abs_conc(:,ip1,it1+1,ic1+1) & |
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| 420 | ! & +pw2 * molar_abs_conc(:,ip1+1,it1+1,ic1+1))) |
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| 421 | DO jlev = 1,nlev |
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| 422 | optical_depth_fl(:,jlev,jcol) = optical_depth_fl(:,jlev,jcol) & |
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| 423 | & + (simple_multiplier(jlev) * mole_fraction_fl(jcol,jlev,igascode)) * ( & |
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| 424 | & (cw1(jlev) * tw1(jlev) * pw1(jlev)) * molar_abs_conc(:,ip1(jlev),it1(jlev),ic1(jlev)) & |
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| 425 | & +(cw1(jlev) * tw1(jlev) * pw2(jlev)) * molar_abs_conc(:,ip1(jlev)+1,it1(jlev),ic1(jlev)) & |
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| 426 | & +(cw1(jlev) * tw2(jlev) * pw1(jlev)) * molar_abs_conc(:,ip1(jlev),it1(jlev)+1,ic1(jlev)) & |
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| 427 | & +(cw1(jlev) * tw2(jlev) * pw2(jlev)) * molar_abs_conc(:,ip1(jlev)+1,it1(jlev)+1,ic1(jlev)) & |
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| 428 | & +(cw2(jlev) * tw1(jlev) * pw1(jlev)) * molar_abs_conc(:,ip1(jlev),it1(jlev),ic1(jlev)+1) & |
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| 429 | & +(cw2(jlev) * tw1(jlev) * pw2(jlev)) * molar_abs_conc(:,ip1(jlev)+1,it1(jlev),ic1(jlev)+1) & |
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| 430 | & +(cw2(jlev) * tw2(jlev) * pw1(jlev)) * molar_abs_conc(:,ip1(jlev),it1(jlev)+1,ic1(jlev)+1) & |
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| 431 | & +(cw2(jlev) * tw2(jlev) * pw2(jlev)) * molar_abs_conc(:,ip1(jlev)+1,it1(jlev)+1,ic1(jlev)+1)) |
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| 432 | end do |
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| 433 | end select |
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| 434 | |
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| 435 | end associate |
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| 436 | |
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| 437 | end do |
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| 438 | |
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| 439 | ! Ensure the optical depth is not negative |
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| 440 | optical_depth_fl(:,:,jcol) = max(0.0_jprb, optical_depth_fl(:,:,jcol)) |
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| 441 | |
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| 442 | ! Rayleigh scattering |
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| 443 | if (this%is_sw .AND. present(rayleigh_od_fl)) then |
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| 444 | DO jlev = 1,nlev |
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| 445 | rayleigh_od_fl(:,jlev,jcol) = global_multiplier & |
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| 446 | & * (pressure_hl(jcol,jlev+1) - pressure_hl(jcol,jlev)) * this%rayleigh_molar_scat |
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| 447 | end do |
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| 448 | end if |
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| 449 | |
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| 450 | end do |
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| 451 | |
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| 452 | if (lhook) call dr_hook('radiation_ecckd:calc_optical_depth',1,hook_handle) |
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| 453 | |
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| 454 | end subroutine calc_optical_depth_ckd_model |
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| 455 | |
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| 456 | !--------------------------------------------------------------------- |
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| 457 | ! Calculate the Planck function integrated across each of the g |
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| 458 | ! points of this correlated k-distribution model, for a given |
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| 459 | ! temperature, where Planck function is defined as the flux emitted |
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| 460 | ! by a black body (rather than radiance) |
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| 461 | subroutine calc_planck_function(this, nt, temperature, planck) |
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| 462 | |
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| 463 | class(ckd_model_type), intent(in) :: this |
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| 464 | integer, intent(in) :: nt |
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| 465 | real(jprb), intent(in) :: temperature(:) ! K |
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| 466 | real(jprb), intent(out) :: planck(this%ng,nt) ! W m-2 |
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| 467 | |
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| 468 | real(jprb) :: tindex1, tw1, tw2 |
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| 469 | integer :: it1, jt |
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| 470 | |
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| 471 | DO jt = 1,nt |
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| 472 | tindex1 = (temperature(jt) - this%temperature1_planck) & |
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| 473 | & * (1.0_jprb / this%d_temperature_planck) |
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| 474 | if (tindex1 >= 0) then |
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| 475 | ! Normal interpolation, and extrapolation for high temperatures |
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| 476 | tindex1 = 1.0_jprb + tindex1 |
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| 477 | it1 = min(int(tindex1), this%nplanck-1) |
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| 478 | tw2 = tindex1 - it1 |
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| 479 | tw1 = 1.0_jprb - tw2 |
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| 480 | planck(:,jt) = tw1 * this%planck_function(:,it1) & |
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| 481 | & + tw2 * this%planck_function(:,it1+1) |
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| 482 | else |
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| 483 | ! Interpolate linearly to zero |
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| 484 | planck(:,jt) = this%planck_function(:,1) & |
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| 485 | & * (temperature(jt)/this%temperature1_planck) |
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| 486 | end if |
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| 487 | end do |
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| 488 | |
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| 489 | end subroutine calc_planck_function |
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| 490 | |
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| 491 | |
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| 492 | !--------------------------------------------------------------------- |
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| 493 | ! Return the spectral solar irradiance integrated over each g point |
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| 494 | ! of a solar correlated k-distribution model, given the |
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| 495 | ! total_solar_irradiance |
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| 496 | subroutine calc_incoming_sw(this, total_solar_irradiance, & |
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| 497 | & spectral_solar_irradiance) |
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| 498 | |
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| 499 | class(ckd_model_type), intent(in) :: this |
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| 500 | real(jprb), intent(in) :: total_solar_irradiance ! W m-2 |
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| 501 | real(jprb), intent(inout) :: spectral_solar_irradiance(:,:) ! W m-2 |
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| 502 | |
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| 503 | spectral_solar_irradiance & |
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| 504 | & = spread(total_solar_irradiance * this%norm_solar_irradiance, & |
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| 505 | & 2, size(spectral_solar_irradiance,2)) |
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| 506 | |
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| 507 | end subroutine calc_incoming_sw |
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| 508 | |
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| 509 | end module radiation_ecckd |
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