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SUMMARY:Information Extraction from Airborne Radio-Echo Sounding: Basal Pr
 operties and Crystal Orientation Fabric of the Greenland Ice Sheet - Tom J
 ordan\, University of Bristol and Stanford University
DTSTART:20180424T133000Z
DTEND:20180424T143000Z
UID:TALK103903@talks.cam.ac.uk
CONTACT:Dr Maria Vittoria Guarino
DESCRIPTION:Airborne radio-echo sounding (RES) is an established geophysic
 al technique that is used to obtain information about the basal and intern
 al properties of ice sheets. This includes constraints upon: basal hydrolo
 gy\, basal roughness\, internal layer structure\, and englacial temperatur
 e. Extraction of glaciologically-relevant information from RES typically r
 equires integration with electromagnetic and geostatistical methods\, whic
 h need to be carefully tuned around the radar measurement system and the s
 pecific glaciological problem being addressed. \n\nIn the first part of th
 e seminar\, I will summarise research output from the University of Bristo
 l NERC project: Basal Properties of Greenland. This project aimed to deter
 mine ice-sheet scale constraints using Operation Ice Bridge RES data\, wit
 h a view to inform the lower boundary condition of thermomechanical ice-sh
 eet models. Topics covered include: the basal water distribution and therm
 al regime of the ice-sheet\; and the relationship between subglacial rough
 ness\, underlying geology and ice-sheet motion.\n\nIn the second part of t
 he seminar\, I will give a brief overview of my current research on the ex
 traction of crystal orientation fabric from airborne polarimetric RES data
  (the POLARIS radar system). This includes a description of phase-correlat
 ion methods used to infer fabric asymmetry and cross-validation of the met
 hod at the NEEM ice-core.\n
LOCATION:British Antarctic Survey\, Seminar Room 187
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