1. Department of Physical Geography and Ecosystem Science; Lund University; 223 62 Lund Sweden
2. GIS Centre; Lund University; 223 62 Lund Sweden
3. Terrestrial Ecology Section, Department of Biology; University of Copenhagen; DK-2100 Copenhagen Denmark
4. Center for Permafrost; University of Copenhagen; DK-1350 Copenhagen Denmark
5. Center for Middle Eastern Studies; Lund University; Finngatan 16 223 62 Lund Sweden