2014–2015 Ocean Current and Pressure Time Series Data from the Upper Florida Keys: Crocker Reef, FL

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Frequently anticipated questions:

What does this data set describe?

2014–2015 Ocean Current and Pressure Time Series Data from the Upper Florida Keys: Crocker Reef, FL
Three Acoustic Doppler current profilers (ADCP), a current meter and a pressure logger were deployed at Crocker Reef, a senile (dead) barrier reef located in the northern portion of the Florida Reef Tract from December 12, 2014 to January 30, 2015 to quantify flow characteristics in various sub-regions. Two SonTek Argonaut-XR current profilers were deployed on the reef flat and configured to measure three-dimensional flow velocities throughout the water column. Both current profilers sampled at a rate of 1 hertz (Hz) for 120 seconds (s) every 10 minutes; each 120-s sampling was internally averaged to provide data at 10-minute resolution. Current profiles were made with a vertical measurement spacing of 0.5 meters (m).
  1. How might this data set be cited?
    Torres-Garcia, Legna M., Zawada, David, and Smiley, Nathan, 20170819, 2014–2015 Ocean Current and Pressure Time Series Data from the Upper Florida Keys: Crocker Reef, FL: U.S. Geological Survey Data Release doi:10.5066/F7VD6XBF, U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -80.526649
    East_Bounding_Coordinate: -80.527645
    North_Bounding_Coordinate: 24.910773
    South_Bounding_Coordinate: 24.909077
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 12-Dec-2014
    Ending_Date: 30-Jan-2015
    ground condition
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference: Upper Florida Keys
      This is a Point data set.
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    The CF-compliant metadata in the global attributes of the NetCDF file provides spatial information as well as the start date and time step for the time-series of data in the file. It also provides information about the instrument configuration and deployment details.
    The entity and attribute information was generated by the individual and/or agency identified as the originator of the dataset. 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)
    • Legna M. Torres-Garcia
    • David Zawada
    • Nathan Smiley
  2. Who also contributed to the data set?
    U.S. Geological Survey
  3. To whom should users address questions about the data?
    U.S. Geological Survey, USGS Southeast Area
    Attn: Legna M. Torres-Garcia
    Research Graduate Assistant
    600 4th Street South
    St. Petersburg, FL

    727-502-8105 (voice)
    727-502-8001 (FAX)

Why was the data set created?

The temperature, pressure derived depth and current data from the fore reef and reef flat in Crocker Reef, FL was used to quantify the physical characteristics and forcing on the reef. This time series dataset includes ocean current profiles that were created using raw data downloaded from the S1 and S2 site locations. The files provided in this data release were converted from the original, proprietary format to the Network Common Data Form (NetCDF) to help facilitate accessibility and distribution to the public.

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: 2017 (process 1 of 2)
    Prior to survey commencement, the SonTek Argonaut XRs were calibrated by the SonTek Company to ensure equipment-related errors would be minimal and the instrument was operating at peak efficiency. Using a self-contained underwater breathing apparatus (SCUBA), USGS staff deployed the meter at the pre-determined sites, called S1 and S2 on December 9 and 10, 2014, respectively. Instrument were recording with internal data logger and power external battery housing, they were retrieved the afternoon of January 30, 2015 to download data following instructions in the SonTek Argonaut XR manual. Using a Matlab script, the raw data were converted from a proprietary file type to NetCDF format and trimmed to include only points that correspond to times when the instruments were actually deployed on the seafloor. Person who carried out this activity:
    Legna M. Torres-Garcia
    U.S. Geological Survey
    Research Graduate Assistant
    600 4th Street S
    St. Petersburg, FL

    (727)-502-8105 (voice)
    (727)-502-8001 (FAX)
    Date: 13-Oct-2020 (process 2 of 2)
    Added keywords section with USGS persistent identifier as theme keyword. 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)
  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?
  2. How accurate are the geographic locations?
    Location information (point position) for this site was obtained from a Garmin GPSmap 62s handheld global positioning system (GPS) with a nominal accuracy of 3 to 5 meters (m) 95% typical (WAAS accuracy in North America).
  3. How accurate are the heights or depths?
    The vertical datum used for this dataset was the North American Vertical Datum of 1988 (NAVD88) with an estimated resolution of 0.3 m.
  4. Where are the gaps in the data? What is missing?
    This dataset is considered complete for the information presented, as described in the abstract section. 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?
    The time series represents the raw data from instruments converted to NetCDF format, no formal logical accuracy tests were conducted.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None.
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey, USGS Southeast Area
    Attn: Legna M. Torres-Garcia
    Research Graduate Assistant
    600 4th Street South
    St. Petersburg, FL

    727-502-8105 (voice)
    727-502-8001 (FAX)
  2. What's the catalog number I need to order this data set? UFK14ArgE306aqd-trm.nc; UFK14ArgE1495aqd-trm.nc
  3. What legal disclaimers am I supposed to read?
    This digital publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: UFK14ArgE306aqd-trm.nc and UFK14ArgE1495aqd-trm.nc are NetCDF files that contain current and pressure observations between December 12, 2014 and January 30, 2015. File includes resolution, location of instrument, data collection statistics, time, ocean current and pressure series. in format NetCDF (version NetCDF version
      Network links: https://coastal.er.usgs.gov/data-release/doi-F7VD6XBF/data/UFK14ArgE306E1495aqd-trm.zip
    • Cost to order the data: None.

Who wrote the metadata?

Last modified: 13-Oct-2020
Metadata author:
Legna M. Torres-Garcia
U.S. Geological Survey, USGS Southeast Area
Research Graduate Assistant
600 4th Street South
St. Petersburg, FL

727-502-8105 (voice)
727-502-8001 (FAX)
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/UFK14ArgE306E1495aqd-trm_metadata.faq.html>
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