1. Institute for European, Russian and Eurasian Studies, The George Washington University, Washington, DC, USA
2. Nansen Environmental and Remote Sensing Centre/Bjerknes Centre for Climate Research, Bergen, Norway
3. Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO, USA
4. Tyumen State University, Tyumen, Russia
5. Faculty of Geography/Research Computing Center, Moscow State University, Moscow, Russia