%0 Journal Article %J Journal of Glaciology %D 2009 %T Calving icebergs indicate a thick layer of temperate ice at the base of Jakobshavn Isbræ, Greenland %A M P Lüthi %A Mark Fahnestock %A Martin Truffer %B Journal of Glaciology %V 55 %P 563–566 %G eng %U http://openurl.ingenta.com/content/xref?genre=article&issn=0022-1430&volume=55&issue=191&spage=563