Changes between Version 52 and Version 53 of doc/app/radiation_parameters


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Timestamp:
Nov 20, 2020 9:10:05 AM (4 years ago)
Author:
maronga
Comment:

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  • doc/app/radiation_parameters

    v52 v53  
    7777This parameter controls the choice of the surface albedos for direct/diffuse/broadband radiation according to the following list of predefined land surfaces.
    7878
    79 For radiation_scheme = 'rrtmg' the shortwave and longwave albedo values are used and the actual albedos are then calculated based on the current solar angle after Briegleb (1992). The displayed values are given for a solar zenith angle of 60° and will vary in the course of the day according to Briegleb (1992). Setting one or more of the parameters [#albedo_lw_dif albedo_lw_dif], [#albedo_lw_dir albedo_lw_dir], [#albedo_sw_dif albedo_sw_dif], [#albedo_sw_dir albedo_sw_dir] will overwrite the respective values set by albedo_type. By default, [#albedo_lw_dif albedo_lw_dif] = [#albedo_lw_dir albedo_lw_dir] and [#albedo_sw_dif albedo_sw_dif] = [#albedo_sw_dir albedo_sw_dir]. Moreover, [#constant_albedo constant_albedo] = .T. will keep the albedos constant during the simulation.
     79For radiation_scheme = 'rrtmg' the shortwave and longwave albedo values are used and the actual albedos are then calculated based on the current solar angle after Briegleb et al. (1986) and Briegleb (1992). The displayed values are given for a solar zenith angle of 60° and will vary in the course of the day according to Briegleb et al. (1986) and Briegleb (1992). Setting one or more of the parameters [#albedo_lw_dif albedo_lw_dif], [#albedo_lw_dir albedo_lw_dir], [#albedo_sw_dif albedo_sw_dif], [#albedo_sw_dir albedo_sw_dir] will overwrite the respective values set by albedo_type. By default, [#albedo_lw_dif albedo_lw_dif] = [#albedo_lw_dir albedo_lw_dir] and [#albedo_sw_dif albedo_sw_dif] = [#albedo_sw_dir albedo_sw_dir]. Moreover, [#constant_albedo constant_albedo] = .T. will keep the albedos constant during the simulation.
    8080
    8181For radiation_scheme = 'clear-sky' the broadband albedo is used and does not vary in the course of the simulation.