Anita Engelstad Kees Nederhoff Li Erikson 20210930 GeoTIFF data release DOI:10.5066/P990NDMQ Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P990NDMQ A nested spectral wave model (Simulating Waves WAves Nearshore [SWAN]; Booij and others, 1999) was deployed for the central Beaufort Sea coast of Alaska to simulate waves for the period from 1979 to 2019. Results in the form of spatial summary statistics, describing wave parameters, wind speed and sea-ice area cover for the intermediate grid (see Overview Image on main page of data release), are provided. Further information can be found in Nederhoff and others (2021). The purpose of this data release is to provide researchers, engineers, and other potential users with summary statistics for the SWAN wave model of the Central Beaufort Sea coast of Alaska. This model was developed through collaborative work between the U.S. Geological Survey (USGS) and Deltares USA. Financial support was provided by the USGS Coastal Marine Hazards and Resources Program and U.S. Bureau of Ocean Energy Management through Interagency Agreement M17PG00046 for the project titled: ‘Wave and Hydrodynamic Modelling Within the Nearshore Beaufort Sea.’ This data release does not intend to provide comprehensive oceanic input data from outside sources, nor does the use of those products imply endorsement by the U.S. Government. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 19790101 20191231 hindcast period Complete None planned -153.34074 -140.85206 71.7992958 69.3537766 USGS Metadata Identifier USGS:2aa9f8a6-3af3-49a4-bf21-0557af4598bf ISO 19115 Topic Category oceans USGS Thesaurus coastal processes Ocean Waves Marine Realms Information Bank (MRIB) keywords numerical modeling waves Data Categories for Marine Planning Distributions None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC Geographic Names Information System (GNIS) State of Alaska Beaufort Sea 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 and Deltares USA as the originator(s) 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

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov StudyArea_LocationMap.png Satellite image showing the location of the study area and the boundaries of the overall, intermediate, and detailed grids used in the SWAN model. PNG Data were generated with the Delft3D HM 4.04.01 modeling suite developed by Deltares and MATLAB on Personal Desktop Computers (PC) equipped with the Windows 10 operating system. Nico Booij Roeland Ris Leo Holthuijsen 1999 Booij, N., Ris, R.C., and Holthuijsen, L.H., 1999, A third-generation wave model for coastal regions; I- Model description and validation: Journal of Geophysical Research, v. 104, p. 7649–7666. https://doi.org/10.1029/98jc02622 Kees Nederhoff Li Erikson Anita Engelstad Peter Bieniek Jeremy Kasper 2021 Nederhoff, K., Erikson, L., Engelstad, A., Bieniek, P., and Kasper, J., 2021, The effect of changing sea ice on nearshore wave climate trends along Alaska’s central Beaufort Sea coast: The Cryosphere https://doi.org/XXXXX Model outputs were compared to observed waves in the central Beaufort Sea to assess the accuracy of simulated results. Total root-mean-square error (RMSE) was less than 0.6 m for significant wave heights at all of the measurement sites. For more details see Nederhoff and others, 2021. All data fall within expected ranges. Dataset is considered complete for the information presented, as described in the abstract. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. A formal accuracy assessment of the vertical positional information in the data set has not been conducted. Copernicus Climate Change Service 2017 GeoTIFF files online Copernicus Climate Change Service Climate Data Store https://cds.climate.copernicus.eu/cdsapp#!/home online database 19790101 20191231 2020 ERA5 reanalyzed atmospheric, land and oceanic climate variables IBCAO Version 4.0 Compilation Group 2020 NetCDF files online British Oceanographic Data Centre, National Oceanography Centre, NERC, UK https://www.gebco.net/data_and_products/gridded_bathymetry_data/arctic_ocean/ online database 19790101 20191231 2020 IBCAO gridded continuous terrain model covering land and ocean in the Arctic region Obtained topobathymetric elevation data and generated grid bathymetries for wave simulations. IBCAO 20200630 Generated input for wave simulations ERA5 20200815 Ran and tested wave simulations with Simulating Waves Nearshore (SWAN; Booij and others, 1999) for all domains. This included model validation with observations where available and initial QC checks. For additional information see Nederhoff and others, 2021. 20210501 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

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Santa Cruz CA 95060 831-460-7545 scochran@usgs.gov Universal Transverse Mercator 6 0.9996 -147.00000 0.00000 500000.0 0.00 row and column 200 200 Meters NAD83 GRS80 6378137.00 298.257223563 approximate Mean Sea Level 0.01 meters Explicit elevation coordinate included with horizontal coordinates wavemodel_summaryStatistics.zip The zip file contains .tiff files with summary statistics. These cover wave, wind and sea ice statistics for the hindcast period from 1979 to 2019. The file names reflect the combination of parameters and derived statistics that can be found in the files as described below. Parameters include significant wave height (Hs), mean wave period (Tm), mean wave direction (Dm), wave orbital velocity (orbital), wave steepness (steepness), wave power (wave_power), wind speed (umag), and sea ice area fraction (ice). Statistics are given for minimum (min), mean (mean), and maximum (max) values, as well as for the 0.250, 0.500, 0.750, 0.950, and 0.995 percentiles. Waves statistics for all variables were only computed when Hs >= 0.15 m, except for Hs itself for which the minimum wave height can be zero. Producer defined U.S. Geological Survey - CMGDS mailing and physical

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov These data are available in GeoTIFF file formats and are contained in a single zip file. 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. geotiff SWAN version 41.31 Zip file Zip file contains 64 GeoTIFF files with summary statistics zip 39.6 https://doi.org/10.5066/P990NDMQ Data can be downloaded using the Network_Resource_Name link then scrolling down to the Simulation Data section. None. 20211013 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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