Wave model grids and bathymetry for the central Beaufort Sea coast, Alaska

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Frequently anticipated questions:

What does this data set describe?

Title:
Wave model grids and bathymetry for the central Beaufort Sea coast, Alaska
Abstract:
The required grid and bathymetry files to run a nested spectral wave model (Simulating Waves WAves Nearshore [SWAN]; Booij and others, 1999) for the central Beaufort Sea coast of Alaska are provided. A three-level SWAN nesting grid with grid resolutions of 5000 meters, 1000 meters, and 200 meters for the overall, intermediate and detail grids, respectively (see included Browse Graphic) has been developed. For this purpose, available local bathymetry (Coastal Frontiers Corporation, 2014; Kasper and others, 2019) was merged with a larger-scale product (IBCAO Version 4.0 Compilation Group, 2020). Further details about the development of this model, model forcings and model settings can be found in Nederhoff and others (2021).
Supplemental_Information:
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    Engelstad, Anita, Nederhoff, Kees, and Erikson, Li, 20210930, Wave model grids and bathymetry for the central Beaufort Sea coast, Alaska: data release DOI:10.5066/P990NDMQ, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -153.34074
    East_Bounding_Coordinate: -140.85206
    North_Bounding_Coordinate: 71.7992958
    South_Bounding_Coordinate: 69.3537766
  3. What does it look like?
    wavemodel_GridsBathymetry_map.png. (PNG)
    Satellite image showing the overall (red), intermediate (blue), and detailed (green) grids used in the SWAN model. ERA5 boundaries are also indicated (yellow circles).
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 01-Jan-1979
    Ending_Date: 31-Dec-2019
    Currentness_Reference:
    hindcast period
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: ascii files
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -147.00000
      Latitude_of_Projection_Origin: 0.00000
      False_Easting: 500000.0
      False_Northing: 0.00
      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 200
      Ordinates (y-coordinates) are specified to the nearest 200
      Planar coordinates are specified in Meters
      The horizontal datum used is NAD83.
      The ellipsoid used is GRS80.
      The semi-major axis of the ellipsoid used is 6378137.00.
      The flattening of the ellipsoid used is 1/298.257223563.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: approximate Mean Sea Level
      Altitude_Resolution: 0.01
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates
  7. How does the data set describe geographic features?
    wavemodel_GridsBathymetry.zip
    The zip file contains 3 grid files, [A.grd], and 3 bathymetry files, [A.dep], where A=overall refers to the outer domain, A=inter refers to the intermediate domain and A=detail refers to the innermost domain (see Browse Graphic) of the nested domain SWAN model for the central Beaufort coast of Alaska. (Source: Producer defined)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Anita Engelstad
    • Kees Nederhoff
    • Li Erikson
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

The purpose of this data release is to provide researchers, engineers, and other potential users with grids and bathymetry that can be used to run the SWAN wave model for the central Beaufort Sea coast of Alaska. These grids and bathymetries were 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.

How was the data set created?

  1. From what previous works were the data drawn?
    IBCAO (source 1 of 1)
    IBCAO Version 4.0 Compilation Group, 2020, The International Bathymetric Chart of the Arctic Ocean (IBCAO) Version 4.0.: British Oceanographic Data Centre, National Oceanography Centre, NERC, UK, online.

    Online Links:

    Type_of_Source_Media: online database
    Source_Contribution:
    gridded continuous terrain model covering land and ocean in the Arctic region
  2. How were the data generated, processed, and modified?
    Date: 30-Apr-2020 (process 1 of 2)
    Obtained topobathymetric elevation data and generated grid bathymetries for wave simulations. Data sources used in this process:
    • IBCAO
    Date: 13-Oct-2021 (process 2 of 2)
    Performed minor edits to the metadata to correct typos. No data were changed Person who carried out this activity:
    U.S. Geological Survey
    Attn: Susan A. Cochran
    Geologist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7545 (voice)
    scochran@usgs.gov
  3. What similar or related data should the user be aware of?
    Booij, Nico, Ris, Roeland, and Holthuijsen, Leo, 1999, A third-generation wave model for coastal regions; I- Model description and validation.

    Online Links:

    Other_Citation_Details:
    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.
    Corporation, Coastal Frontiers, 2014, Suspended sediment dispersal during the Liberty Development construction.

    Other_Citation_Details:
    Coastal Frontiers Corporation, 2014, Suspended sediment dispersal during the Liberty Development construction: Report prepared for BP Exploration, Anchorage, AK, 60 pp.
    Kasper, Jeremy, Jump, S., and Duvoy, Paul, 2019, Central Beaufort Sea wave and hydrodynamic modeling study 2018 Field Report.

    Other_Citation_Details:
    Kasper, J., Jump, S., and Duvoy, P., 2019, Central Beaufort Sea wave and hydrodynamic modeling study 2018 Field Report: UAF Cooperative Agreement M17AC00020/ USGS CFDA No. 15.423.
    Nederhoff, Kees, Erikson, Li, Engelstad, Anita, Bieniek, Peter, and Kasper, Jeremy, 2021, The effect of changing sea ice on nearshore wave climate trends along Alaska’s central Beaufort Sea coast.

    Online Links:

    Other_Citation_Details:
    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

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    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 measurement sites. For more details see Nederhoff and others, 2021.
  2. How accurate are the geographic locations?
    Data are concurrent with topobathymetric DEM locations. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted.
  3. How accurate are the heights or depths?
    A formal accuracy assessment of the vertical positional information in the data set has not been conducted.
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented, as described in the abstract.
  5. How consistent are the relationships among the observations, including topology?
    All data fall within expected ranges.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
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.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - CMGDS
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov
  2. What's the catalog number I need to order this data set? These data are available in SWAN specific file formats (.grd and .dep) and are contained in a single zip file.
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: compatible with the windows executable of SWAN in format ascii files (version SWAN version 41.31) Zip file contains 3 grid files and 3 depth files Size: 3.3
      Network links: https://doi.org/10.5066/P990NDMQ
    • Cost to order the data: None.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2021
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P990NDMQ/wavemodel_GridsBathymetry_metadata.faq.html>
Generated by mp version 2.9.50 on Thu Oct 14 14:47:20 2021