Changes between Version 21 and Version 22 of doc/app/radiation_parameters


Ignore:
Timestamp:
Nov 2, 2017 10:16:55 AM (7 years ago)
Author:
maronga
Comment:

--

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  • doc/app/radiation_parameters

    v21 v22  
    160160|----------------
    161161{{{#!td style="vertical-align:top"
    162 [=#lambda '''lambda''']
     162[=#lw_radiation '''lw_radiation''']
     163}}}
     164{{{#!td style="vertical-align:top"
     165L
     166}}}
     167{{{#!td style="vertical-align:top"
     168.T.
     169}}}
     170{{{#!td
     171Parameter to switch off longwave radiation.
     172
     173When using RRTMG, longwave radiation calls can be switched off by setting {{{lw_radiation = .F.}}}.
     174}}}
     175|----------------
     176{{{#!td style="vertical-align:top"
     177[=#net_radiation '''net_radiation''']
    163178}}}
    164179{{{#!td style="vertical-align:top"
     
    169184}}}
    170185{{{#!td
    171 Geographical longitude (in degrees).
    172 
    173 Note that the radiation scheme also requires information on the geographical latitude (see [wiki:doc/app/inipar#phi phi]).
    174 }}}
    175 |----------------
    176 {{{#!td style="vertical-align:top"
    177 [=#lw_radiation '''lw_radiation''']
     186Net radiation at the surface in W/m². This parameter is only used in case of [#radiation_scheme radiation scheme]{{{= 'constant'}}}.
     187}}}
     188|----------------
     189{{{#!td style="vertical-align:top"
     190[=#radiation_scheme '''radiation_scheme''']
     191}}}
     192{{{#!td style="vertical-align:top"
     193C*10
     194}}}
     195{{{#!td style="vertical-align:top"
     196'clear-sky'
     197}}}
     198{{{#!td
     199Radiation scheme to be used.
     200
     201The user can choose between the following schemes:
     202
     203'' 'constant' ''
     204
     205A constant net radiation at the surface is prescribed (see [#net_radiation]).
     206
     207
     208'' 'clear-sky' ''
     209
     210A 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], [#lambda lambda], [wiki:doc/app/inipar#phi phi], and [../inipar#time_utc_init time_utc_init].
     211
     212
     213'' 'rrtmg' ''
     214
     215The [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], [#lambda 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].
     216
     217Please 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.
     218}}}
     219|----------------
     220{{{#!td style="vertical-align:top"
     221[=#skip_time_do_radiation '''skip_time_do_radiation''']
     222}}}
     223{{{#!td style="vertical-align:top"
     224R
     225}}}
     226{{{#!td style="vertical-align:top"
     2270.0
     228}}}
     229{{{#!td
     230Time after which the radiation model is switched on. This parameter can be used to allow the LES model to develop turbulence before it is affected by radiation.
     231}}}
     232|----------------
     233{{{#!td style="vertical-align:top"
     234[=#sw_radiation '''sw_radiation''']
    178235}}}
    179236{{{#!td style="vertical-align:top"
     
    184241}}}
    185242{{{#!td
    186 Parameter to switch off longwave radiation.
    187 
    188 When using RRTMG, longwave radiation calls can be switched off by setting {{{lw_radiation = .F.}}}.
    189 }}}
    190 |----------------
    191 {{{#!td style="vertical-align:top"
    192 [=#net_radiation '''net_radiation''']
    193 }}}
    194 {{{#!td style="vertical-align:top"
    195 R
    196 }}}
    197 {{{#!td style="vertical-align:top"
    198 0.0
    199 }}}
    200 {{{#!td
    201 Net radiation at the surface in W/m². This parameter is only used in case of [#radiation_scheme radiation scheme]{{{= 'constant'}}}.
    202 }}}
    203 |----------------
    204 {{{#!td style="vertical-align:top"
    205 [=#radiation_scheme '''radiation_scheme''']
    206 }}}
    207 {{{#!td style="vertical-align:top"
    208 C*10
    209 }}}
    210 {{{#!td style="vertical-align:top"
    211 'clear-sky'
    212 }}}
    213 {{{#!td
    214 Radiation scheme to be used.
    215 
    216 The user can choose between the following schemes:
    217 
    218 '' 'constant' ''
    219 
    220 A constant net radiation at the surface is prescribed (see [#net_radiation]).
    221 
    222 
    223 '' 'clear-sky' ''
    224 
    225 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], [#lambda lambda], [wiki:doc/app/inipar#phi phi], and [../inipar#time_utc_init time_utc_init].
    226 
    227 
    228 '' 'rrtmg' ''
    229 
    230 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], [#lambda 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].
    231 
    232 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.
    233 }}}
    234 |----------------
    235 {{{#!td style="vertical-align:top"
    236 [=#skip_time_do_radiation '''skip_time_do_radiation''']
    237 }}}
    238 {{{#!td style="vertical-align:top"
    239 R
    240 }}}
    241 {{{#!td style="vertical-align:top"
    242 0.0
    243 }}}
    244 {{{#!td
    245 Time after which the radiation model is switched on. This parameter can be used to allow the LES model to develop turbulence before it is affected by radiation.
    246 }}}
    247 |----------------
    248 {{{#!td style="vertical-align:top"
    249 [=#sw_radiation '''sw_radiation''']
    250 }}}
    251 {{{#!td style="vertical-align:top"
    252 L
    253 }}}
    254 {{{#!td style="vertical-align:top"
    255 .T.
    256 }}}
    257 {{{#!td
    258243Parameter to switch of shortwave radiation.
    259244