HR: 12:05h
AN: C42A-08    [Abstracts]
TI: Study of Ice Sheet Basal Processes With Visible Light Images Acquired from a Borehole Probe
AU: * Carsey, F D
EM: fcarsey@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 United States
AU: Behar, A
EM: alberto.behar@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 United States
AU: Engelhardt, H
AF: Geology and Geophysics, California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125 United States
AU: Craven, M
EM: mike_cra@exchange.aad.gov.au
AF: Australian Antarctic Division, Channel Highway, Kingston, Tas 7050 Australia
AU: Vogel, S
EM: vogel.118@osu.edu
AF: Byrd Polar Research Center, Ohio State University, 1090 Carmack Rd, Columbus, OH 43210 United States
AU: Christoffersen, P
EM: poul@es.ucsc.edu
AF: Earth Sciences, University of California Santa ruz, 1156 High Street, Santa Cruz, CA 95064 United States
AB: We have developed and deployed the JPL Ice Borehole Camera system into boreholes in two sites in Antarctica (and are deploying it in a third at the time of this meeting), and we have analyzed the image data to improve our understanding of processes at the bed of ice streams and the at basal surface of ice shelves. Though quite simple, the image data sets permitted interpretation of basal freeze-on associated with "binge and purge" processes of the Kamb Ice Stream as well as ice accretion processes, marine ice character and the marine ice-meteoric ice interface of the Amery Ice Shelf. In many ways the hot-water drilled hole is an excellent photographic environment for study of ice sheet phenomena; we are now examining means of augmenting simple digital imagery with additional optical, noninvasive interrogation strategies in order to obtain data on included particle properties, clathrate content, biological materials and phenomena, and on-going dynamic processes.
DE: 5462 Polar regions
DE: 3349 Polar meteorology
DE: 1827 Glaciology (1863)
DE: 1620 Climate dynamics (3309)
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting