1. *Climate and Land Surface Systems Interaction Centre, Department of Geography, University of Leicester, Leicester, United Kingdom
2. Climate and Land Surface Systems Interaction Centre, Centre for Ecology and Hydrology, Section for Earth Observation, Huntingdon, United Kingdom
3. Climate and Land Surface Systems Interaction Centre, Department of Geography, University of Swansea, Swansea, United Kingdom
4. Joint Research Centre of the European Commission, Institute for Environment and Sustainability, Global Environment Monitoring Unit, Ispra, Italy
5. Boreal Ecosystems Monitoring Laboratory, Space Research Institute, Russian Academy of Sciences, Moscow, Russia