(Table 2) AMS radiocarbon dates from sediment cores obtained during James Clark Ross cruise JR142, Kvitøya Trough

• Main Authors: Hogan, Kelly A, Dowdeswell, Julian A, Noormets, R, Evans, Jeffrey, Ó Cofaigh, Colm, Jakobsson, Martin
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Age; 14C AMS; dated; dated material; dated standard deviation; Core; DEPTH; sediment/rock; Event label; GC; Gravity corer; International Polar Year (2007-2008); IPY; James Clark Ross; JR142; JR142-GC10; JR142-GC11; JR20060728; Latitude of event; Longitude of event; Svalbard Shelf; Svalbard; Barents Sea; Ice Sheet; International Polar Year; Kvitøya
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.811288; https://doi.org/10.1594/PANGAEA.811288

High-resolution geophysical and sediment core data are used to investigate the pattern and dynamics of former ice flow in Kvitøya Trough, northwestern Barents Sea. A new swath-bathymetric dataset identifies three types of submarine landform in the study area (streamlined landforms, meltwater channels and cavities, iceberg scours). Subglacially produced streamlined landforms provide a record of ice flow through Kvitøya Trough during the last glaciation. Flow directions are inferred from the orientations of streamlined landforms (drumlins, crag-and-tail features). Ice flowed northward for at least 135 km from an ice divide at the southern end of Kvitøya Trough. A large channel-cavity system incised into bedrock in the southern trough indicates that subglacial meltwater was present at the former ice-sheet base. Modest landform elongation ratios and a lack of mega-scale glacial lineations suggest that, although ice in Kvitøya Trough was melting at the bed and flowed faster than the likely thin and cold-based ice on adjacent banks, a major ice stream probably did not occupy the trough. Retreat was relatively rapid after 14-13.5 14C kyr B.P. and probably progressed via ice sheet-bed decoupling in response to rising sea level. There is little evidence for still stands during ice retreat or of ice-proximal deglacial sediments. Relict iceberg scours in present-day water depths of more than 350 m in the northern trough indicate that calving was an important mass loss mechanism during retreat.