Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3208502b&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 8, CiteID L08502
Physics
6
Hydrology: Glaciology (0736, 0776, 1863), Hydrology: Instruments And Techniques: Modeling, Radio Science: Signal Processing (0674)
Scientific paper
Normal-moveout velocity analysis can lead to significant overestimates of the velocity structure of temperate glaciers since most englacial reflectors approximate point scatters and violate the assumption of planar flat lying reflectors. Migration velocity analysis (MVA) is a tool that does not depend on the assumption of flat lying reflectors. MVA can provide laterally and vertically continuous velocity estimates from conventional common-offset radar sections. In a study of temperate Bench Glacier, Alaska, we used MVA coupled with dielectric modeling to estimate the distribution of water content along a cross-section of the glacier. We found the glacier has two layers, an upper layer with relatively low water content, and lower layer with relatively high water content. The ability to quantify hydrostratigraphy is important in understanding water storage and routing within glaciers.
Bradford John H.
Harper T. Jr. J.
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