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SUMMARY:Frequency and triggers of huge underwater landslides - and their r
 elationship to climate change and sediment delivery from ice streams - Pet
 er Talling (National Oceanography Centre\, Southampton)
DTSTART:20141112T130000Z
DTEND:20141112T140000Z
UID:TALK55324@talks.cam.ac.uk
CONTACT:Poul Christoffersen
DESCRIPTION:Submarine landslides can be far larger than even the largest t
 errestrial landslide. For instance\, the Storegga Slide that occurred 8\,2
 00 years ago offshore Norway contained over 3\,000 cubic kilometers of mat
 erial\, and is bigger than Scotland. It generated a major tsunami that inu
 ndated surrounding coastlines to heights of up to 3-20m above sea level. T
 he Storegga Slide coincided with the last major abrupt climate change - th
 e so called 8.2ka event. This talk will explore the evidence for (and agai
 nst) the links between major submarine landslides and climate change\, and
  pulses of sediment delivery by cross-shelf ice streams. Perhaps the most 
 remarkable feature of these huge underwater slides is that they occur on s
 lopes of <2 degrees\, which are about as flat as a Premiership soccer pitc
 h. The talk will also explore how such widespread slope failure can be tri
 ggered on such remarkably low gradients. The talk will contain preliminary
  results from a NERC funded research cruise in July 2014\, which successfu
 lly collected 88 cores and > 1\,200km of swath bathymetry lines from the N
 ordic Seas. It will conclude with recent work on direct monitoring of othe
 r types of sediment mass flow (turbidity currents)\, which it is hoped to 
 extend to glacially fed systems.
LOCATION:Scott Polar Research Institute\, main lecture theatre
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