TY - JOUR T1 - Calving icebergs indicate a thick layer of temperate ice at the base of Jakobshavn Isbræ, Greenland JF - Journal of Glaciology Y1 - 2009 A1 - M P Lüthi A1 - Mark Fahnestock A1 - Martin Truffer VL - 55 UR - http://openurl.ingenta.com/content/xref?genre=article&issn=0022-1430&volume=55&issue=191&spage=563 ER -