PhenoProfile is a computer program for modeling forest phenology based on the NDVI index derived from satellite imagery.
The phenological curve is modeled by a double logistic function. The shape of the curve takes into account both the basic states of deciduous trees, the state of foliage, and the state after foliage fall.
The main input of the program are series of NDVI rasters and a mask of tree species distribution.
The parameters of the double logistic function are calculated for each point representing a tree species. The vegetation phase is calculated based on the first and second derivatives of the double logistic function:
- Beginning of bud break: day of maximum acceleration of leaf unfolding (GAD, the maximum of the first derivative of the function in spring).
- Beginning of leaf unfolding: inflection point of the phenological curve in spring (GSD).
- End of leaf unfolding: day of maximum deceleration of leaf unfolding (GDD, the day of minimum of the first derivative in spring).
- Full foliage: day of the maximum of the phenological curve (FMD).
- Onset of leaf yellowing: day of maximum acceleration of leaf yellowing (DAD, the day of minimum of the first derivation in autumn).
- Beginning of leaf fall: turning point of the phenological curve in autumn (DSD).
- End of leaf fall: day of maximum deceleration of leaf yellowing (DDD, the day of maximum of the first derivative in autumn).
References
Bucha, T., Sitková, Z., Pavlendová, H., Snopková, Z., 2022. Spring phenology of oak stands in the Western Carpathians: validation of satellite metrics from MODIS using ground-based observations. Central European Forestry Journal 68, 191–202. https://doi.org/10.2478/forj-2022-0014
Lukašová, V., Bucha, T., Škvareninová, J., Škvarenina, J., 2019. Validation and Application of European Beech Phenological Metrics Derived from MODIS Data along an Altitudinal Gradient. Forests 10, 60. https://doi.org/10.3390/f10010060
Barka, I., Bucha, T., Molnár, T., Móricz, N., Somogyi, Z., Koreň, M., 2019. Suitability of MODIS-based NDVI index for forest monitoring and its seasonal applications in Central Europe. Central European Forestry Journal 65, 206–217. https://doi.org/10.2478/forj-2019-0020
Bucha, T., Koreň, M., 2017. Phenology of the beech forests in the Western Carpathians from MODIS for 2000-2015. iForest – Biogeosciences and Forestry 10, 537–546. https://doi.org/10.3832/ifor2062-010
Acknowledgements
Development of the software was supported by the Satellite-based Observations of Forest Ecosystem Response to Globally Changing Environmental Conditions project (APVV-0670-07).
Contact
- Milan Koreň, Technical University in Zvolen, Slovakia
- Tomáš Bucha, National Forest Center, Zvolen, Slovakia
Download
License
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”).
Disclaimer
The Software is provided “as is” and the Authors disclaim all warranties with respect to the Software, including all implied warranties of merchantability and fitness. In no event shall the authors be liable for any special, direct, indirect, or consequential damages or any damages whatsoever resulting from loss of use, loss of data, or loss of profits, whether in an action in contract, negligence, or other tortious action, arising out of or in connection with the use or performance of this software.
Agreement
By downloading or using the Software, you agree to the terms of this End User License Agreement. If you do not agree to the terms of this End User License Agreement, do not download or use the Software.
Notice
The program was developed in C# and obfuscated by ConfuserEx, which is why some antivirus programs detect a threat. We apologize for the inconvenience.
Download the latest version of the software: PhenoProfile 1.53