1. Department of GeographyUniversity of Guelph Guelph Ontario Canada
2. Department of GeosciencesUniversity of Oslo Oslo Norway
3. Periglacial ResearchAlfred Wegener Institute Helmholtz Centre for Polar and Marine Research Potsdam Germany
4. Geography DepartmentHumboldt University Berlin Germany
5. Department of GeographyWilfrid Laurier University Waterloo Ontario Canada