Estimating nearshore bedform amplitudes with altimeters
Gallagher, E. L.
Guza, R. T.
Thornton, Ed B.
MetadataShow full item record
Estimates of the heights of large (0.1-0.4 m heights and 1-10 m horizontal lengths) migrating bedforms on a sandy beach made with fixed, single-point altimeters are similar to heights estimated from profiles across the bedforms made with altimeters mounted on an amphibious vehicle that traversed the surf zone. Unlike many profiling systems, the robust, fixed altimeters can measure bedforms in bubbly, sediment-laden surfzone waters nearly continuously, including during storms, thus allowing investigation of the relationships between bedform heights and near-bottom velocities to be extended to a wide range of wave conditions. The fixed-altimeter observations of migrating bedforms suggest a sandy surfzone seafloor is not always smooth during energetic conditions with strong mean currents and large wave-orbital velocities.
Author Posting. © The Authors, 2005. This is the author's version of the work. It is posted here by permission of Elsevier B. V. for personal use, not for redistribution. The definitive version was published in Marine Geology 216 (2005): 51-57, doi:10.1016/j.margeo.2005.01.005.
Suggested CitationPreprint: Gallagher, E. L., Elgar, Steve, Guza, R. T., Thornton, Ed B., "Estimating nearshore bedform amplitudes with altimeters", 2005-01-14, https://doi.org/10.1016/j.margeo.2005.01.005, https://hdl.handle.net/1912/423
Showing items related by title, author, creator and subject.
Moulton, Melissa; Elgar, Steve; Raubenheimer, Britt (2013-06)Surfzone bathymetry often is resolved poorly in time because watercraft surveys cannot be performed when waves are large, and remote sensing techniques have limited vertical accuracy. However, accurate high-frequency ...
Dynamics of the Antarctic circumpolar current : evidence for topographic effects from altimeter data and numerical model output Gille, Sarah T. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-02)Geosat altimeter data and numerical model output are used to examine the circulation and dynamics of the Antarctic Circumpolar Current (ACC). The mean sea surface height across the ACC has been reconstructed from height ...
Barber, Deborah K. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1989-09)Eighteen months of sea surface height data from the GEOSAT altimeter along collinear subtracks were analyzed for information on the circulation pattern in the Bering Sea. Seventy subtracks from both ascending and descending ...