HR: 1340h
AN: C43A-0225    [Abstracts]
TI: A Study of Radar Echo Sounding Response and Clutter Using Data From Jakobshavn, Greenland
AU: * Huang, H
EM: hh9ee@mizzou.edu
AF: University of Missouri-Columbia, 349 EBW, Columbia, MO 65211 United States
AU: Legarsky, J
EM: legarskyj@missouri.edu
AF: University of Missouri-Columbia, 349 EBW, Columbia, MO 65211 United States
AB: Since outlet glacier responses to climate change may occur much more rapidly than those of the ice sheet interior, the behavior over time of the outlet glaciers is likely a key indicator to observe. Thus, a better understanding of the linkage between the outlet responses and the rest of the ice sheet may be desirable for refining the models that try to predict changes in ice sheet mass balance. Under the NASA PARCA program, the Remote Sensing Laboratory of the University of Kansas has collected extensive airborne radar depth sounding data over Greenland's outlet glaciers as well as its interior. The radar (150 MHz center frequency) has sounded the ice thickness (i.e. from surface and bedrock returns) of the vast majority of its flight lines. Around the coastal regions in a few locations, strong clutter can and does mask the bedrock topographical information. Portions of the radar data from the Jakobshavn glacier exhibit noticeable levels of clutter. This study examines the clutter in the radar data from the Jakobshavn region. We modeled the clutter by an effective surface electromagnetic (EM) model and using the available data. The results are presented for averaged Jakobshavn radar data for an effective rough surface and an effective smooth surface. This first-order approach produced reasonable agreement between the radar data and the EM model. Also, typical samples from the same radar from outside the clutter regions will be examined for comparison.
DE: 6969 Remote sensing
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting