Changes between Version 22 and Version 23 of doc/app/radiation_parameters
- Timestamp:
- Jan 29, 2018 3:24:58 PM (7 years ago)
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doc/app/radiation_parameters
v22 v23 208 208 '' 'clear-sky' '' 209 209 210 A simple clear sky model is used to calculate the radiation fluxes at the surface (shortwave incoming, shortwave outgoing, longwave incoming, longwave outgoing) and consequently the net radiation at the surface. This scheme requires setting [#albedo albedo], [../inipar#day_of_year_init day_of_year_init], [#l ambda lambda], [wiki:doc/app/inipar#phi phi], and [../inipar#time_utc_init time_utc_init].210 A simple clear sky model is used to calculate the radiation fluxes at the surface (shortwave incoming, shortwave outgoing, longwave incoming, longwave outgoing) and consequently the net radiation at the surface. This scheme requires setting [#albedo albedo], [../inipar#day_of_year_init day_of_year_init], [#longitude longitude], [wiki:doc/app/inipar#latitude latitude], and [../inipar#time_utc_init time_utc_init]. 211 211 212 212 213 213 '' 'rrtmg' '' 214 214 215 The [http://rtweb.aer.com/rrtm_frame.html RRTMG model] is used to calculate the radiative heating rates for each model column. This scheme requires setting [../inipar#day_of_year_init day_of_year_init], [#l ambda lambda], [wiki:doc/app/inipar#phi phi], [../inipar#time_utc_init time_utc_init]. The following parameters can be set optionally: [#albedo_type albedo_type] (and/or [#albedo_lw_dif albedo_lw_dif], [#albedo_lw_dir albedo_lw_dir], [#albedo_sw_dif albedo_sw_dif], [#albedo_sw_dir albedo_sw_dir]). [#constant_albedo constant_albedo] can be used to fix the albedo during the simulation. It is also possible to use the switches [#lw_radiation lw_radiation] and [#sw_radiation sw_radiation].215 The [http://rtweb.aer.com/rrtm_frame.html RRTMG model] is used to calculate the radiative heating rates for each model column. This scheme requires setting [../inipar#day_of_year_init day_of_year_init], [#longitude longitude], [wiki:doc/app/inipar#latitude latitude], [../inipar#time_utc_init time_utc_init]. The following parameters can be set optionally: [#albedo_type albedo_type] (and/or [#albedo_lw_dif albedo_lw_dif], [#albedo_lw_dir albedo_lw_dir], [#albedo_sw_dif albedo_sw_dif], [#albedo_sw_dir albedo_sw_dir]). [#constant_albedo constant_albedo] can be used to fix the albedo during the simulation. It is also possible to use the switches [#lw_radiation lw_radiation] and [#sw_radiation sw_radiation]. 216 216 217 217 Please note that the use of RRTMG requires to compile PALM with {{{__rrtmg}}} preprocessor directive. By the same token it is not possible to switch the radiation scheme to 'clear-sky' or 'constant' for such a compiled PALM executable.