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SUMMARY:Ice structure\, brine infiltration\, and firn saturation from fiel
 d observations on three Antarctic ice shelves - Dr. Katie Miles (Lancaster
  University)
DTSTART:20260212T160000Z
DTEND:20260212T170000Z
UID:TALK243913@talks.cam.ac.uk
CONTACT:109526
DESCRIPTION:Antarctic ice shelves are the floating extensions of the conti
 nental ice sheet into the ocean\, buttressing the flow of inland\, grounde
 d ice from the continent’s interior. Over 50% of the Antarctic margin is
  fringed by such ice shelves\, which are formed of alternating bands of me
 teoric glacier and suture zone ice. Suture zone ice is softer and fracture
 s less easily than meteoric ice – understanding the structure and mechan
 ical state of ice shelves is crucial to assessment of their vulnerability 
 to thinning\, rift propagation\, and potential disintegration. In this tal
 k\, I will present field observations from three ice shelves around Antarc
 tica (Larsen C\, Shackleton\, and McMurdo): optical televiewer imaging of 
 the interior of hot-water drilled boreholes to infer ice structure\; groun
 d-penetrating radar surveys informing on the extent of brine infiltration\
 ; and observations of firn saturation and near-surface refrozen melt layer
 s\, concluding with implications for more widespread ice slab presence and
  formation.
LOCATION:Scott Polar Research Institute\, main lecture theatre
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