The FFPonline tool

FFPonline allows you to upload a time series of input data. For each time step of the input data, an FFP footprint is calculated. All footprints for the time series are aggregated to a footprint climatology. The tool also derives an unsupervised land cover classification for the footprint area and overlays the footprint climatology with the classification, providing you with a simple estimate of what land cover contributes most to the measured fluxes.

Please register or sign in to use the FFPonline tool. Information on input data requirements and formatting, as well as on the result files can be found here.

For details on the footprint parameterisation and its limitations see Kljun, N., P. Calanca, M.W. Rotach, H.P. Schmid, 2015: A simple two‐dimensional parameterisation for Flux Footprint Prediction (FFP). Geosci. Model Dev., 8, 3695‐3713. doi:10.5194/gmd‐8‐3695‐2015.

Please acknowledge the source of your footprint estimates by citing the above article. Thanks!
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For customised simulations, for example for using your own maps or to design your own figures, you can download the FFP code (Matlab, Python, R) at

This webtool has been initiated by the COST action Optimise ES1309.

Natascha Kljun, Claudio D’Onofrio, Tarek El-Madany, Enrico Tomelleri, Georg Wohlfahrt