Physics
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3214502v&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 14, CiteID L14502
Physics
7
Cryosphere: Ice Streams, Cryosphere: Thermodynamics (1011, 3611, 8411), Cryosphere: Thermal Regime, Cryosphere: Ice Sheets, Geographic Location: Antarctica (4207)
Scientific paper
Borehole observations from the base of the West-Antarctic Ice Sheet (WAIS) reveal the presence of a 10 to 15 m thick accretionary basal ice layer in the upstream area of Kamb Ice Stream (KIS). This ice layer has formed over a time of several thousand years by freeze-on of subglacial water to the ice base and has recorded during this time basal conditions upstream of its current location. Analysis of samples and videos sequences from boreholes drilled to the bottom of KIS confirms that KIS-stoppage was due to basal freeze-on and that relubrication of the ice stream is well underway. These results further suggest that ice stream cyclicity may be shorter than expected (1000s of years) and that a restart of KIS may be imminent within decades to centuries.
Behar A. E.
Carsey Frank D.
Engelhardt Hermann
Joughin Ian
Kamb Barclay
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