A Simple Parameterisation for Flux Footprint Predictions

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Online footprint
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Literature
Presentation @ EGU 2004
FAQ

Calculate a Footprint based on the Parameterisation
Input data
σw [ms-1]: Standard deviation of vertical velocity fluctuations
u* [ms-1]: Surface friction velocity
zm [m]: Measurement height
h [m]: Planetary boundary-layer height
z0 [m]: Roughness length
R [0-90%]: Percentage of the footprint included
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Restrictions
-200 ≤ zm/L ≤ 1
u* ≥ 0.2 ms-1
zm > 1 m
zm < h
Dynamically homogeneous terrain
Example
Try this example: 0.54 / 0.2 / 30.0 / 1500 / 0.01 / 80
Note
The online footprint parameterisation is based on scenarios representing a broad range of stability conditions, receptor heights, and roughness lengths. For a more specific prediction, the parameterisation can simply be fitted to selected scaled footprint estimates (i.e. taking into account the receptor height and/or the roughness length of a specific experimental site). Please contact me if you are interested in such a specific parameterisation.

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