Oceanographic time-series measurements from the mouth of the Columbia River, Oregon and Washington, 2013

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Frequently anticipated questions:

What does this data set describe?

Title:
Oceanographic time-series measurements from the mouth of the Columbia River, Oregon and Washington, 2013
Abstract:
Time-series data of water surface elevation, wave height, and water column currents, temperature, salinity, and acoustic seabed images were acquired for 38 days between 9 May and 15 June, 2013 in the mouth of the Columbia River, Oregon and Washington.
Supplemental_Information:
Information about the data collection field activities can be found at: https://cmgds.marine.usgs.gov/fan_info.php?fan=S0313WO
  1. How might this data set be cited?
    Stevens, Andrew W., Gelfenbaum, Guy, MacMahan, Jamie, Reniers, Ad J.H.M., Elias, Edwin P., Sherwood, Christopher R., and Carlson, Emily M., 2017, Oceanographic time-series measurements from the mouth of the Columbia River, Oregon and Washington, 2013: data release DOI:10.5066/F7NG4NS1, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Stevens, Andrew W., Gelfenbaum, Guy, MacMahan, Jamie, Reniers, Ad J.H.M., Elias, Edwin P., Sherwood, Christopher R., and Carlson, Emily M., 2017, Oceanographic measurements and hydrodynamic modeling of the mouth of the Columbia River, Oregon and Washington, 2013: data release DOI:10.5066/F7NG4NS1, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -124.06505
    East_Bounding_Coordinate: -123.98542
    North_Bounding_Coordinate: 46.26505
    South_Bounding_Coordinate: 46.23073
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/590794fbe4b0fc4e448eaffa?name=tripod_annotated.jpg&allowOpen=true (JPEG)
    Map showing locations of survey transects
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 09-May-2013
    Ending_Date: 15-Jun-2013
    Currentness_Reference:
    ground condition at time data were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: NetCDF files
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (3)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview:
    NetCDF files are self-contained and attribute information may be found in the header of the file itself.
    Entity_and_Attribute_Detail_Citation:
    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.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Andrew W. Stevens
    • Guy Gelfenbaum
    • Jamie MacMahan
    • Ad J.H.M. Reniers
    • Edwin P. Elias
    • Christopher R. Sherwood
    • Emily M. Carlson
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Andrew W. Stevens
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Oceanographer
    2885 Mission Street
    Santa Cruz, CA
    USA

    831-460-7424 (voice)
    831-427-4748 (FAX)
    astevens@usgs.gov

Why was the data set created?

These time-series data were collected as a part of a larger investigation into hydrodynamics in the mouth of the Columbia River, Oregon and Washington.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 15-Jun-2013 (process 1 of 3)
    Instrumented tripods were deployed on May 9, 2013 from the F/V Cape Windy at three locations within the MCR. Each tripod was equipped with similar instrumentation including an upward looking 1200 kHz Teledyne RD Instruments acoustic Doppler current profiler (ADCP), a 5 MHz Sontek acoustic Doppler velocimeter (ADV) and Hydra data recorder, an RBR conductivity, temperature, and depth (CTD) sensor, and Imagenex 881 (fan beam) and 881A (pencil beam) sonars. The three tripods frames were approximately 2.5 m tall and 3 m wide. After navigating to the planned tripod deployment locations, the tripods were lowered to the seafloor using the ship's boom, and once on the bottom, the locations were recorded using a hand-held GPS and the water depth was recorded using the ship's echosounder. Two independent methods for recovery of the tripods were included on the tripods. A ground line that led to a 500-lb clump weight and a surface buoy was the primary recovery method. The tripods also included Edgetech CART acoustic releases attached to a 14 inch float and line bucket mounted on the tripod. On June 15, 2013, all the tripods were successfully recovered from the F/V Cape Windy resulting in a 38-day deployment. Two of the tripods (North and West) were recovered using the ground line and surface float. During recovery of the South tripod, the line between the clump weight and surface float parted. The acoustic release was triggered and the float and line was used to recover the instrument package.
    Date: 23-May-2017 (process 2 of 3)
    After recovery of the tripods, the manufacturers' software was used to download the data, apply calibration coefficients, and convert the data to scientific units. These output files were then converted by custom, instrument-specific Matlab programs to netCDF files.
    Date: 19-Oct-2020 (process 3 of 3)
    Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?

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

  1. How well have the observations been checked?
    No formal attribute accuracy tests were conducted.
  2. How accurate are the geographic locations?
    A formal accuracy assessment of the horizontal positional information in the data set has either not been conducted, or is not applicable.
  3. How accurate are the heights or depths?
    A formal accuracy assessment of the vertical positional information in the data set has either not been conducted, or is not applicable.
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata for each part of this data release carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    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 as the originator(s) of the dataset and in products derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    USA

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable time-series data in NetCDF format. NetCDF files are grouped into three (3) different zip files, one zip file per instrument mooring. Each zip folder contains one NetCDF file per instrument, as well as an index in .csv format that briefly explains the contents of each netCDF 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?

Who wrote the metadata?

Dates:
Last modified: 19-Oct-2020
Metadata author:
Andrew W. Stevens
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Oceanographer
2885 Mission Street
Santa Cruz, CA
USA

831-460-7424 (voice)
831-427-4748 (FAX)
astevens@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/ScienceBase/DR_F7NG4NS1/mcr13_tripod_metadata.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:17:19 2021