1. a Institute of Geography, University of Copenhagen , Øster Voldgade 10, DK-1350 , Copenhagen K. , Denmark
2. b Institute of Geography: University of Copenhagen , Øster Voldgade 10, DK-1350 , Copenhagen K. , Denmark
3. c Arctic Station , DK-3953 Qeqertarsuaq/Godhavn, Greenland