1. Institute of Geography and Earth Sciences; Aberystwyth University; Aberystwyth; UK
2. Geophysical Institute; University of Alaska Fairbanks; Fairbanks; Alaska; USA
3. Department of Geography and Geology; University of Nebraska at Omaha; Omaha; Nebraska; USA
4. Department of Geography and Environmental Studies; Wilfrid Laurier University; Waterloo, Ontario; Canada
5. Department of Geography, College of Science; Swansea University; Swansea; UK