A holistic microclimate model

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kb:lad [2012/08/15 22:52]
enviadmin
kb:lad [2017/11/10 09:25] (current)
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 $$ \frac{ \text{Leaf surface } (m^2)}{ \text {Reference volume } (m^3)} $$ $$ \frac{ \text{Leaf surface } (m^2)}{ \text {Reference volume } (m^3)} $$
  
-In ENVI-met, like in most other models, the LAD is counted **one-sided** which means that only one side of the leaf is counted as active surface area. This accounts to the fact, that most plants only have [[wp>Stomata|stomata]] on one side of the leaf, typically on the back (but there are others as well). So for the exchange of latent heat ($LE$) it makes sense to count only one side of the leaf as active surface. Also, for the exchange of sensible heat ($H$), normally only one side is exposed to the wind while the other is in the lee of the leaf so that its exchange coeficient approaches zero. This is - of course- a simplicifcation which can be discussed. ​   ​+In ENVI-met, like in most other models, the LAD is counted **one-sided** which means that only one side of the leaf is counted as active surface area. This accounts to the fact, that most plants only have [[wp>Stoma|stoma]] on one side of the leaf, typically on the back (but there are others as well). So for the exchange of latent heat ($LE$) it makes sense to count only one side of the leaf as active surface. Also, for the exchange of sensible heat ($H$), normally only one side is exposed to the wind while the other is in the lee of the leaf so that its exchange coeficient approaches zero. This is - of course- a simplicifcation which can be discussed. ​   ​
  
 ===== Objective ===== ===== Objective =====