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Potential Temperature 

The high gradient of potential temperature close to the top of the canopy generates the eddies in x direction. The canopy affects the air not only inside but also above.

 














Longitudinal Velocity 

The vertical gradient of longitudinal velocity is larger close to the top of the canopy because of the eddies. The air above the canopy is faster than the air inside because drag force is larger inside than outside.






Figure 1.  Potential temperature for a 2 hours simulation of a homogeneous canopy forest. The frame rate is 30 s. Q_h(h) is set to 0.005 K m s-1.




Figure 2.  Longitudinal velocity for a 2 hours simulation of a homogeneous canopy forest. The frame rate is 30 s. Q_h(h) is set to 0.005 K m s-1.


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