Time-series data on currents, waves, and turbidity off Santa Cruz, CA, 2014-2015

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Frequently anticipated questions:


What does this data set describe?

Title:
Time-series data on currents, waves, and turbidity off Santa Cruz, CA, 2014-2015
Abstract:
Time series data of water surface elevation, wave height, currents, and turbidity were acquired during the winters of 2014-2015 and 2015-2016 in support of a study on the morphological change of rippled scour depressions off Santa Cruz, CA. One set of instruments (SCW) was mounted at the end of Santa Cruz Municipal Wharf during both winters. Another set of instruments (M1T) was deployed offshore in Monterey Bay each winter; the two offshore winter locations were different, but each were about 0.5 km offshore of Point Santa Cruz.
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=2014-674-FA http://cmgds.marine.usgs.gov/fan_info.php?fan=2015-677-FA
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?
    Rosenberger, Kurt J., 2018, Time-series data on currents, waves, and turbidity off Santa Cruz, CA, 2014-2015: data release DOI:10.5066/F71C1W36, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Dartnell, Peter, Rosenberger, Kurt J., and Storlazzi, Curt D., 2018, Bathymetry, acoustic-backscatter, and time-series datasets collected between 2014 and 2016 of a field of crescent-shaped rippled scour depressions in northern Monterey Bay, California: data release DOI: 10.5066/F71C1W36, 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: -122.018967
    East_Bounding_Coordinate: -122.010361
    North_Bounding_Coordinate: 36.957222
    South_Bounding_Coordinate: 36.938500
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 25-Nov-2014
    Ending_Date: 02-Jun-2016
    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?
      Indirect_Spatial_Reference:
      Data were collected from three different locations. Refer to self-contained NetCDF files for more location information.
    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 0.1. Longitudes are given to the nearest 0.1. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is NAD-83.
      The ellipsoid used is WGS_1984.
      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: Mean Sea Level
      Altitude_Resolution: 0.1
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates
  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: 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)
    • Kurt J. Rosenberger
  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 continuous measurements of waves and tides from these instrument deployments, coupled with available meteorological measurements of wind and rainfall, provide information on physical forcing mechanisms responsible for observed morphological change in repeat mapping surveys.

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: 07-Nov-2014 (process 1 of 4)
    Instruments included in deployment are: RBR Virtuoso D.Wave wave Logger, Nortek AWAC directional wave gauge, and Nortek Aquadopp acoustic Doppler current profiler.
    Date: 02-Jun-2016 (process 2 of 4)
    Wave gauge was recovered at the end of winter 2014-2015, and redeployed in the fall of 2015 for the winter of 2015-2016.
    Date: 10-Jun-2016 (process 3 of 4)
    Data were accumulated into NetCDF files. During post-processing, data collected when instruments were out of the water, and data degraded by biological fouling, were removed from the time series. Bad data points were identified by 1) the deployment and recovery times, 2) pressure readings equal to or less than 3 cm of water.
    Date: 10-Jun-2016 (process 4 of 4)
    Files are named with a convention that uses a 13-digit alpha-numeric code. The first three characters for this dataset are all 'NMB' for the experiment name.; the fourth and fifth positions represent the calendar year in which the first data point in the file was taken (15, 2015). The sixth, seventh and eighth is an alphanumeric code for the site name (SCW, M1T). The ninth and tenth represent the instrument position on the platform, where 01 is the top-most. Next is a two or three-character code for data type(rbr – RBR Wave Gauge; aqd – Nortek Aquadopp; aw – Nortek AWAC). Files of wave statistics from Nortek AWAC or RBR Wave Gauge have the suffix 'Wvs-p'.
  3. What similar or related data should the user be aware of?
    Rosenberger, Kurt J., Storlazzi, Curt D., and Dartnell, Peter, 2018, Morphodynamics of a field of crescent-shaped rippled scour depressions, northern Monterey Bay, CA.

    Online Links:

    Other_Citation_Details:
    Rosenberger, K.J., Storlazzi, C.D., and Dartnell, Peter, 2018, Morphodynamics of a field of crescent-shaped rippled scour depressions, northern Monterey Bay, CA: Marine Geology, doi: 10.1016/j.margeo.2018.10.006

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?
    The accuracy of the GPS unit used to locate the instruments is +/- 5 meters.
  3. How accurate are the heights or depths?
    There are two sources of uncertainty associated with vertical positioning of the instruments: 1) the measuring tools used during instrument mounting, 2) the amount of settling that occurs during deployment. There was no evidence that the platforms settled to a large degree, they are easily lifted by one person, the sediment tends to be very compacted in the study area, and analysis of distance to bed data did not show gradients over the duration of deployment. The measuring tools used to mount the instruments onto the platforms have a resolution of 0.1 cm resulting in an uncertainty of 0.05 cm.
  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?
    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. “This information is not intended for navigation purposes.”
  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? Downloadable data in NetCDF format. NetCDF files for each instrument and deployment are grouped into one (1) 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?

Who wrote the metadata?

Dates:
Last modified: 18-Oct-2018
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)

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