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remark_1_flux [2012/07/07 01:02] 134.93.180.188remark_1_flux [2017/11/10 09:09] (current) – external edit 127.0.0.1
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 So, we get for the longwave radiation from the **free sky (''LW_free'')**: So, we get for the longwave radiation from the **free sky (''LW_free'')**:
-  LW_free= trans_plant*LW_sky+ (1-trans_plant)*LW_plant\\+  LW_free= trans_plant*LW_sky+ (1-trans_plant)*LW_plant
 where ''LW_sky'' is the atmospheric counter radiation and ''LW_plant'' is the radiation of the leafs (averaged over a vertical column) where ''LW_sky'' is the atmospheric counter radiation and ''LW_plant'' is the radiation of the leafs (averaged over a vertical column)
  
 For the **obstructed sky ''(LW_obst)''**, the rule is: For the **obstructed sky ''(LW_obst)''**, the rule is:
-  //LW_obst= max(q_lw_envi,q_lwsurf)//+  LW_obst= max(q_lw_envi,q_lwsurf)
  
-where ''q_LW_envi'' is an averaged value over all facade temperatures in the model  and ''q_lwsurf'' is the longwave radiation of the surface concerned itself. The "max" function ensures that the highest of the values is used (see above)+where ''q_LW_envi'' is an averaged value over all facade temperatures in the model  and ''q_lwsurf'' is the longwave radiation of the surface concerned itself. The "max" function ensures that the highest of the values is used (see above).
  
 Finally, the total incoming longwave radiation is weighted between ''LW_free'' and ''LW_obst'' using the ''SVF'': Finally, the total incoming longwave radiation is weighted between ''LW_free'' and ''LW_obst'' using the ''SVF'':
-  //LW_total= SVF*LW_free+(1-SVF)*LW_obst//+  LW_total= SVF*LW_free+(1-SVF)*LW_obst
  
 The values found in the receptor files for radiation coming from the vegetation, the sky and from the environment are based on this calculation for the selected surface: The values found in the receptor files for radiation coming from the vegetation, the sky and from the environment are based on this calculation for the selected surface:
-  //from vegetation = SVF*(1-trans_plant)*LW_plant +  from vegetation = SVF*(1-trans_plant)*LW_plant 
-from sky=SVF*trans_plant*LW_sky  +  from sky=SVF*trans_plant*LW_sky  
-from environment= (1-SVF)*max(q_lw_envi,q_lwsurf)//+  from environment= (1-SVF)*max(q_lw_envi,q_lwsurf)
  
    
 They are **NOT** the total amount of longwave radiation **emitted** (e.g. from the plants) but the amount of radiation **reaching** the surface of interest!  They are **NOT** the total amount of longwave radiation **emitted** (e.g. from the plants) but the amount of radiation **reaching** the surface of interest!