Lincoln H Pitcher¹, Laurence C Smith², Colin J Gleason³, Clément Miège⁴, Johnny Ryan², Birgit Hagedorn⁵, Dirk van As⁶, Winnie Chu⁷ and Richard R Forster⁸, (1)University of California Los Angeles, Los Angeles, CA, United States, (2)Brown University, Providence, RI, United States, (3)University of Massachusetts, Amherst, MA, United States, (4)University of Utah, Salt Lake City, UT, United States, (5)University of Alaska Anchorage, Anchorage, AK, United States, (6)Geological Survey of Denmark and Greenland, København K, Denmark, (7)Lamont-Doherty, Palisades, NY, United States, (8)Department of Geography, University of Utah, Salt Lake City, UT, United States