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|Title:||Multibeam bathymetry, terrestrial LiDAR topography, and three-dimensional velocity structure observations of the ice marginal marine environment at Hubbard Glacier, AK|
|Authors:||Coastal and Hydraulics Laboratory (U.S.)|
United States. Army. Corps of Engineers. Alaska District.
Finnegan, David C.
Lawson, Daniel E.
Butler, William C.
Waller, Terry N.
Pratt, Thad C.
|Publisher:||Cold Regions Research and Engineering Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||ERDC TR ; 10-8.|
Abstract: Hubbard Glacier, near Yakutat, Alaska, is the largest non-polar tidewater glacier in the world. In contrast to most glaciers in southeast Alaska, Hubbard Glacier continues to advance and has thickened at an average rate of 35 m yr⁻¹. Twice since 1986 Hubbard Glacier has advanced enough to cause a temporary closure of Russell Fiord. If Hubbard Glacier continues to advance, a permanent closure of Russell Fiord would ultimately cause significant damage to the town of Yakutat and the economic fisheries that sustain it. This report presents the results of a first-of-its-kind survey of the submarine and terrestrial environment of the Hubbard Glacier tidewater terminus and the area surrounding Gilbert Point. High-resolution, multibeam bathymetry and current velocity profiles, combined with simultaneously acquired high-resolution LiDAR topography, provide a detailed look at the section of the glacier where ice damming of Russell Fiord is likely to occur.
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