Conductivity, temperature and depth time-series data collected in 2011 in the vicinity of Arey Lagoon and Barter Island, Alaska

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Frequently anticipated questions:

What does this data set describe?

Title:
Conductivity, temperature and depth time-series data collected in 2011 in the vicinity of Arey Lagoon and Barter Island, Alaska
Abstract:
Time-series measurements of waves, currents, water levels, sea surface temperatures, ocean salinity, and water, air, and ground temperatures were collected in July through September 2011 in and around Arey Lagoon, near Barter Island, Alaska. Directional wave spectra, currents, water levels, salinity, and bottom and surface water temperatures were measured with a bottom-mounted 1MHz Nortek AWAC, HOBO temperature loggers, and a Solinst Levelogger in ~5m water depth offshore of Arey Island. Within Arey Lagoon, a bottom-mounted frame equipped with a Nortek 1MHz Aquadopp, Solinst Levelogger, and HOBO temperature loggers measured currents, water levels, and water temperatures. Ground temperatures (maximum depth 3 meters below the surface), were measured with HOBO temperature loggers and EMS iButtons at incremental depths across a tundra bluff, within a wet sedge region, and on the Arey Island island surrounding Arey Lagoon. This metadata file describes the conductivity, temperature, and depth (CTD) measurements that were collected, and the salinity that was calculated from the conductivity. Data summaries and further details can be found in Erikson and others, 2020.
Supplemental_Information:
Additional information about the field activities from which these data were derived is available online at: http://cmgds.marine.usgs.gov/fan_info.php?fan=ID411AR http://cmgds.marine.usgs.gov/fan_info.php?fan=IR411AR 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?
    Erikson, Li H., Gibbs, Ann E., Richmond, Bruce M., Jones, Benjamin M., Storlazzi, Curt D., and Ohman, Karin A., 20201207, Conductivity, temperature and depth time-series data collected in 2011 in the vicinity of Arey Lagoon and Barter Island, Alaska: data release DOI:10.5066/P9LGYO2Q, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Erikson, Li H., Gibbs, Ann E., Richmond, Bruce M., Jones, Benjamin M., Storlazzi, Curt D., and Ohman, Karin A., 2020, Modeled 21st century storm surge, waves, and coastal flood hazards, and supporting oceanographic and geological field data (2010 and 2011) for Arey and Barter Islands, Alaska and vicinity: data release DOI:10.5066/P9LGYO2Q, 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: -143.928732
    East_Bounding_Coordinate: -143.709384
    North_Bounding_Coordinate: 70.120847
    South_Bounding_Coordinate: 70.082721
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/5b85ba38e4b05f6e321d40a0?name=BTI_2011_TimeSeriesData_SampleLocationMap.jpg&allowOpen=true (.JPG)
    Map of the location and SiteIDs of time-series data
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 12-Jul-2011
    Ending_Date: 26-Sep-2011
    Currentness_Reference:
    ground condition at time data were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: comma-delimited text
  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 (47094)
    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 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is 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?
    BTI_2011TimeSeriesData_CTD.csv
    Conductivity, Temperature, and Depth measurements (Source: Producer defined)
    SiteID
    Name of measurement site (Source: Producer defined) Unique identifier for the sampling site given in the field
    Longitude
    Longitude coordinate (Source: Producer defined)
    Range of values
    Minimum:-143.92597
    Maximum:-143.71477
    Units:Decimal degrees
    Resolution:0.00001
    Latitude
    Latitude coordinate (Source: Producer defined)
    Range of values
    Minimum:70.08421
    Maximum:70.11687
    Units:Decimal degrees
    Resolution:0.00001
    year
    Year of acquisition (Source: Producer defined)
    Range of values
    Minimum:2011
    Maximum:2011
    Units:year
    Resolution:1
    month
    Month of acquisition (Source: Producer defined)
    Range of values
    Minimum:7
    Maximum:9
    Units:month
    Resolution:1
    day
    Day of acquisition (Source: Producer defined)
    Range of values
    Minimum:1
    Maximum:31
    Units:day
    Resolution:1
    hour
    Hour of acquisition (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:23
    Units:hour
    Resolution:1
    minute
    Minute of acquisition (Source: Producer defined)
    Range of values
    Minimum:3
    Maximum:59
    Units:minute
    Resolution:1
    seconds
    Second of acquisition (Source: Producer defined)
    Range of values
    Minimum:2
    Maximum:49
    Units:second
    Resolution:1
    conductivity(mS/cm)
    Conductivity (Source: Producer defined)
    Range of values
    Minimum:25.37
    Maximum:55.65
    Units:mS/cm
    Resolution:0.01
    salinity(PSU)
    Salinty (Source: Producer defined)
    Range of values
    Minimum:11.412
    Maximum:45.325
    Units:PSU
    Resolution:0.001
    temperature(degrees_Celsius)
    Temperature (Source: Producer defined)
    Range of values
    Minimum:-3.086
    Maximum:21.526
    Units:Degrees C
    Resolution:0.001
    depth(meters)
    Depth of water above instrument (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:5.21
    Units:Meters
    Resolution:0.01
    Entity_and_Attribute_Overview: The first line of the csv file is a header line.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Li H. Erikson
    • Ann E. Gibbs
    • Bruce M. Richmond
    • Benjamin M. Jones
    • Curt D. Storlazzi
    • Karin A. Ohman
  2. Who also contributed to the data set?
    Arctic Landscape Conservation Cooperative (ALCC), U.S. Fish & Wildlife Service
  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?

Data were obtained to provide inputs and validation data for a numerical model, and additionally to provide baseline environmental data previously not available.

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: 20-Oct-2011 (process 1 of 2)
    Near seabed conductivity, temperature, and depth measurements was collected using a Solinst Levelogger Model 3001. Salinity was computed from conductivity measurements using methods of PSS78 UNESCO, 1981. Instrument depth = 4.69 meters.
    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?
    Erikson, Li H., Gibbs, Ann E., Richmond, Bruce M., Storlazzi, Curt D., Jones, Benjamin M., and Ohman, Karin A., 2020, Changing Storm Conditions in Response to Projected 21st Century Climate Change Scenarios and the Potential Impact on an Arctic Barrier Island Lagoon System: A Pilot Study for Arey Island and Lagoon, Eastern Arctic Alaska.

    Online Links:

    Other_Citation_Details:
    Erikson, L.H., Gibbs, A.E., Richmond, B.M., Storlazzi, C.D., Jones, B.M., and Ohman, K.A., 2020, Changing storm conditions in response to projected 21st century climate change and the potential impact on an arctic barrier island–lagoon system—A pilot study for Arey Island and Lagoon, eastern Arctic Alaska: U.S. Geological Survey Open-File report 2020-1142
    Unesco, 1981, Background papers and supporting data on the International Equation of State 1980.

    Online Links:

    Other_Citation_Details:
    UNESCO, 1981. Background papers and supporting data on the International Equation of State 1980. UNESCO Tech. Pap. in Mar. Sci., No. 38, 25 pp, Paris, FR, UNESCO.

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

  1. How well have the observations been checked?
    Standard operating procedures were used to collect all data. Instruments used to measure salinity, waves, water levels, and currents were calibrated prior to deployment. Directional wave and current data were calibrated to account for the magnetic declination (23.3 degrees) so that all reported values are relative to true north. Manufacturer instrument resolution and accuracy are as follows: AWAC waves: within 2 degrees for directions, <1% error of measured wave heights and periods; AWAC velocities: ~1% accuracy of measured values; AWAC and Aquadopp pressures: within 0.5%; AWAC and Aquadopp nearbed water temperatures: within 0.1 degrees Celsius; Aquadopp velocities: accuracy of 2cm/s; Solinst level logger conductivity: accuracy within 0.1% of measured values; HOBO temperature loggers: accuracy within 0.2 degrees Celsius; Solinst Levelogger temperatures: within 0.1 degrees Celsius; EMS iButton temperature loggers: accuracy of 1 degree Celsius.
  2. How accurate are the geographic locations?
    A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. Marine point locations were measured with a hand-held, WAAS enabled Garmin 76CSx GPS unit. Horizontal accuracy is estimated to be 5 meters.
  3. How accurate are the heights or depths?
    Water depths associated with CTD measurements were determined from the pressure sensor and are expected to be accurate within 0.01 m.
  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 rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    Data have been checked for duplications and omissions. Missing data have been filled with NaN values. Where data were not collected a value of n/a is used. Near bed salinity concentration data measured in August 2011 with the Solinst Leveloggers that were mounted on the AWAC and Aquadopp instrument frames are questionable.

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

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? These data are available in csv format contained in a single zip file, which also includes CSDGM FGDC compliant metadata and a sample location map.
  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?
  5. What hardware or software do I need in order to use the data set?
    These data can be viewed with any text reading software.

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/ScienceBase/DR_P9LGYO2Q/BTI_2011TimeSeriesData_CTD_metadata.faq.html>
Generated by mp version 2.9.50 on Thu Oct 14 14:47:22 2021