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.
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 ...
Caruso, Michael J.; Sirkes, Ziv; Flament, Pierre J.; Baker, M. K. (Woods Hole Oceanographic Institution, 1990-09)Satellite altimeters provide many opportunities for oceanographers to supplement their research with a valuable new data set. The recent GEOSAT exact repeat mission is the first of several altimeter missions proposed ...
On eddy viscosity, energy cascades, and the horizontal resolution of gridded satellite altimeter products Arbic, Brian K.; Polzin, Kurt L.; Scott, Robert B.; Richman, James G.; Shriver, Jay F. (American Meteorological Society, 2013-02)Motivated by the recent interest in ocean energetics, the widespread use of horizontal eddy viscosity in models, and the promise of high horizontal resolution data from the planned wide-swath satellite altimeter, this paper ...