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• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Ice grounding; Chukchi Borderland; Multibeam bathymetry; Iceberg scour; Arctic; Arctic Ocean; Mercer; Chukchi; Ice Shelves; Iceberg*; Sea ice
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.463.2872; http://people.su.se/~mjako/PDF/Jakobsson_etal_2005_QR.pdf

and sediment cores, reflecting the limited access to the these features were caused by the action of a grounded shelf ice. An alternative interpretation is provided by Kristoffersen et al. (2004) who argue that the mapped idge were formed Quaternary Research 63 (20Introduction A diversity of hypotheses and speculations exists about past glacial conditions in the Arctic Ocean. These vary from sea-ice-free conditions with limited glaciation on surrounding shelves (Olausson, 1985) to huge floating ice shelves, N1 km thick and fed by large ice caps that occupied the surrounding shelves (e.g., Grosswald, 1980; Hughes et al., 1977; Mercer, 1970). Testing these ideas has been difficult because of the lack of geophysical data central Arctic Ocean by surface ships. Over the past 10– 15 years, however, scientific icebreaker and nuclear