1. Institute for Earth Observation, Eurac Research, Bozen-Bolzano, Italy
2. Institute for Alpine Environment, Eurac Research, Bozen-Bolzano, Italy
3. Faculty of Science and Technology, Free University of Bozen-Bolzano, Bozen-Bolzano, Italy
4. Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy