Joanne C.T. Ferreira Jessica R. Lacy Gerald Hatcher 20201231 NetCDF files data release doi:10.5066/P9T90PO1 Pacific Coastal and Marine Science Center Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9T90PO1 https://www.sciencebase.gov/catalog/item/5fad942bd34eb413d5df4758 On February 27, 2010, a tsunami originating near Chile arrived in Monterey Bay, California. This data release comprises two hours of pressure and near-bed velocity data spanning the largest tsunami waves. At the time, the U.S. Geological Survey Pacific Coastal and Marine Science Center had a remotely-controlled instrumented platform deployed adjacent to the Santa Cruz Municipal Wharf (mean depth 9 m) for collecting hydrodynamic and sediment transport data. In anticipation of the arrival of the tsunami, sampling was changed to better capture the event. Pressure and near-bed velocity profiles were measured at 1 Hz for 25 minutes every half hour. The velocities are influenced by surface waves, tsunami waves, and tidal currents. The velocity profiles capture the unsteady boundary layer that developed due to the tsunami-induced currents. They are useful for understanding the frictional interaction of the tsunami with the sea floor, as well as sediment transport produced by the tsunami. These data were collected to measure conditions near the sea floor on the inner shelf during the arrival of a remote tsunami in Monterey Bay. Purposes for the data collection included determining sediment transport generated by the tsunami, and for producing a data set to test numerical models of tsunami flows and their interaction with the sea floor. These data are intended for science researchers, students, policy makers, and the general public. Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=WD108MB Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form. 20100227 20100227 ground condition at time data were collected. Complete None planned -122.0171 -122.0169 36.957 36.9568 Data Categories for Marine Planning Water Column Features ISO 19115 Topic Category geoscientificInformation USGS Thesaurus time series datasets tsunamis Marine Realms Information Bank (MRIB) keywords field observation water level measurements physical oceanography none U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC USGS Metadata Identifier USGS:5fad942bd34eb413d5df4758 Geographic Names Information System State of California Monterey Bay Santa Cruz Municipal Wharf none USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originators of the dataset and in products derived from these data. This information is not intended for navigation purposes. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060-5792 US 831-427-4747 pcmsc_data@usgs.gov https://www.sciencebase.gov/catalog/file/get/ 5fad942bd34eb413d5df4758?name=Seafloor_Observatory_Tripod.jpg&allowOpen=true Photograph of the Seafloor Observatory Tripod being deployed off the end of the Santa Cruz Municipal Wharf JPEG https://www.sciencebase.gov/catalog/file/get/ 5fad942bd34eb413d5df4758?name=PT058_Tsunami_velocity_plot.png&allowOpen=true image of plotted water depth and velocity PNG Jessica R. Lacy David M. Rubin Daniel Buscombe 2012 Lacy, J.R., Rubin, D.M., and Buscombe, D., 2012, Currents, drag, and sediment transport induced by a tsunami: Journal of Geophysical Research, v. 117, C09028, doi:10.1029/2012JC007954 https://doi.org/10.1029/2012JC007954 Jessica R. Lacy Christopher R. Sherwood 2004 Lacy, J.R., and Sherwood, C.R., 2004, Accuracy of a pulse-coherent acoustic doppler profiler in a wave-dominated flow: Journal of Atmospheric and Oceanic Technology, v. 21(9), p. 1448-1461 https://doi.org/10.1175/1520-0426(2004)021<1448:AOAPAD>2.0.CO;2 No formal attribute accuracy tests were conducted. No formal logical accuracy tests were conducted. Data fall within expected ranges. Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Horizontal accuracy derived from GPS instrumentation is less than 1 m. Mean water depth at the tripod site was taken from a bathymetric map, and accuracy is estimated at 50 cm. Programming of Sontek pulse coherent acoustic doppler profiler (PCADP) deployed in Monterey Bay changed to capture tsunami data. 20100227 PCADP data processed using manufacturers software. 20100315 Data from pulse-coherent velocimeters must be corrected for ambiguity errors, which occur when velocities exceed the resolved range (Lacy and Sherwood, 2004). To assist with this correction, the Sontek PCADP measures velocities (called resolution velocities) at a single point at relatively short range, where greater velocities can be resolved, before collecting each profile. For these four bursts, we first corrected ambiguity errors in the resolution velocities, attributable to the high instantaneous speeds produced by the combination of surface waves and the tsunami. Then ambiguity errors in the velocity profiles were resolved as described in Lacy and Sherwood (2004), using the corrected rather than raw resolution velocities. 20101026 Data were accumulated into a NetCDF file and bad sensor data removed. 20201123 Performed minor edits to the metadata to correct typos. No data were changed 20211013 U.S. Geological Survey Susan A. Cochran Geologist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7545 scochran@usgs.gov Data were collected continuously at survey locations. Refer to self-contained NetCDF files for more location information. 1.0E-5 1.0E-5 Decimal degrees World Geodetic System 1984 (WGS84) WGS84 6378137.0 298.257223563 NetCDF files are self-contained and attribute information may be found in the header of the file itself. The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information. U.S. Geological Survey - ScienceBase mailing and physical

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Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov These data are available in zipped NetCDF format and CSDGM FGDC-compliant metadata. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. NetCDF Matlab (v 2016) Data are in NetCDF format. Downloadable zip file contains NetCDF (.nc) file and metadata. WinZip or archive utility 1.5 https://www.sciencebase.gov/catalog/file/get/5fad942bd34eb413d5df4758?name=PT058_Tsunami_bursts.zip https://doi.org/10.5066/P9T90PO1 Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of time-series data from day 058 during the arrival of the tsunami event. The second link points to a landing page with time-series data and metadata, as well as the browse images. none 20211013 PCMSC Science Data Coordinator U.S. Geological Survey, Pacific Coastal and Marine Science Center mailing and physical

2885 Mission Street

Santa Cruz CA 95060 United States 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998