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SUMMARY:Remote sensing of melt and fracture on Larsen C ice shelf\, Antarc
 tica - Dr Suzanne Bevan
DTSTART:20171115T163000Z
DTEND:20171115T173000Z
UID:TALK88141@talks.cam.ac.uk
CONTACT:Ian Willis
DESCRIPTION:Surface meltwater ponding has been implicated in the recent br
 eak-up of ice shelves along the Antarctic Peninsula. I will present some o
 bservations of ponds on Larsen C ice shelf and show how they coincide with
  troughs in the surface mapped using synthetic aperture radar (SAR) interf
 erometry.  For ponds to form\, the ice shelf surface needs to have undergo
 ne sufficient melt/refreeze cycles to densify the ice to the point at whic
 h it is impermeable to continued melt. It is relatively straightforward to
  spot surface ponding in optical satellite imagery but detecting liquid wa
 ter within an unsaturated snow pack requires observations in the microwave
 . I will show how QuikSCAT and\, recently available\, enhanced resolution 
 ASCAT radar scatterometry data reveals patterns and trends in melt on the 
 ice shelf from 1999-2017.\nFinally\, I will show how we used interferometr
 y and the Sentinel 1 SAR data to monitor the progression of the rift which
  caused the recent calving of the 5\,800 km2 ice berg from Larsen C.\n
LOCATION:Scott Polar Research Institute\, main lecture theatre
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