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Description
Abstract: Frequent surveys using modern remote sensing technology enable observations of subaerial beach morphology and surface sediment type (sand versus gravel/cobble) with unprecedented spatial and temporal resolution. Here we show weekly terrestrial mobile LiDAR observations of cusps on a mixed sediment beach, consisting of sand and gravel/cobble, spanning ~2 km alongshore. Surface gravel/cobble coverage varied from almost complete to none (e.g. all sand), over times ranging from weekly to seasonal, and with location. Cusp morphologies also varied in space and time. Cusps with 11-20 m alongshore wavelengths (L) primarily developed in winter and were composite with gravel-cobble horns and sandy bays. Cusps with L between 21-40 m developed throughout the year and were either composite or entirely sandy. Previously not reported, composite mega cusps (L between 200-400 m) occurred in winter. Composite cusps, with L between 11-40 m, were clustered in gravel/cobble-rich mega cusp bays, and absent on the sandier mega cusp horns. This study was funded by the U.S. Army Corps of Engineers (W912HZ192) and the California Department of Parks and Recreation, Natural Resources Division Oceanography Program (C19E0026 and C1670004). Research Data Curation Program, UC San Diego, La Jolla, 92093-0175 (https://lib.ucsd.edu/rdcp) Matsumoto, Hironori; Young, Adam P.; Guza, Robert T. (2020). Data from: Cusp and mega cusp observations on a mixed sediment beach. UC San Diego Library Digital Collections. https://doi.org/10.6075/J0RB734D Is Supplement To: Matsumoto, H., Young, A. P., & Guza, R. T. (2020). Cusp and mega cusp observations on a mixed sediment beach. Earth and Space Science, 7, e2020EA001366. https://doi.org/10.1029/2020EA001366 The dataset contains elevation rasters and gravel/cobble locations in geotiff format (North American Datum of 1983 (NAD 83), North American Vertical Datum of 1988 (NAVD 88)).
Type
Dataset
Language
No linguistic content; Not applicable
Subject
Sand cusp Mobile LiDAR Mega cusp Composite cusp Gravel-cobble Mixed sediment beach Torrey Pines State Beach, California
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