Document Type
Article
Publication Title
Geophysical Research Letters
Publisher
American Geophysical Union
Publication Date
4-20-2005
Volume
32
Disciplines
Earth Sciences
Abstract
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.
DOI
10.1029/2004GL021770
Rights
© 2005 by the American Geophysical Union
Recommended Citation
Bradford, J. H., and J. T. Harper (2005), Wave field migration as a tool for estimating spatially continuous radar velocity and water content in glaciers, Geophys. Res. Lett., 32, L08502, doi:10.1029/2004GL021770.
Comments
An edited version of this paper was published by AGU. Copyright (2005) American Geophysical Union.