Samiah Moustafa¹, Asa K Rennermalm², Dirk van As³, Irina Overeem⁴, Marco Tedesco⁵, Thomas L Mote⁶, Lora Koenig⁷, Laurence C Smith⁸, Birgit Hagedorn⁹, Ronald S Sletten¹⁰, Andreas Bech Mikkelsen¹¹, Bent Hasholt¹¹, Xavier Fettweis¹², Lincoln H Pitcher¹³ and Alun Hubbard¹⁴, (1)Brown University, Institute at Brown for Environment and Society, Providence, RI, United States, (2)Rutgers University, New Brunswick, NJ, United States, (3)Geological Survey of Denmark and Greenland, København K, Denmark, (4)University of Colorado, Institute of Arctic and Alpine Research, Boulder, CO, United States, (5)Columbia University, Palisades, NY, United States, (6)Univ Georgia, Athens, GA, United States, (7)NSIDC, Boulder, CO, United States, (8)Brown University, Providence, RI, United States, (9)University of Alaska Anchorage, Anchorage, AK, United States, (10)University of Washington, Quaternary Research Center, Earth and Space Sciences, Seattle, WA, United States, (11)University of Copenhagen, Department of Geosciences and Natural Resource Management, Copenhagen, Denmark, (12)University of Liège, Liège, Belgium, (13)University of California Los Angeles, Los Angeles, CA, United States, (14)Aberystwyth University, Aberystwyth, United Kingdom