Effects of Late Holocene Climate and Coastal Change in Mobile Bay, Alabama: ADCIRC Model Input and Results (Velocity_Residual_RS_MP_PH)

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Frequently anticipated questions:

What does this data set describe?

Title:
Effects of Late Holocene Climate and Coastal Change in Mobile Bay, Alabama: ADCIRC Model Input and Results (Velocity_Residual_RS_MP_PH)
Abstract:
Using version 52.30 of the ADvanced CIRCulation (ADCIRC) numerical model (Luettich and others, 1992), astronomic tides were simulated at Mobile Bay, Alabama (AL), under scenarios of Holocene geomorphic configurations representing the period of 3500 to 2300 years before present including a breach in the Morgan Peninsula and a land bridge at Pass aux Herons, as described in Smith and others (2020). The two-dimensional ADCIRC model can be applied to coastal and estuarine systems to solve for time-dependent hydrodynamic circulation and transport scenarios. For this study, the ADCIRC unstructured finite element mesh domain spans to the 60 meridian west in the Atlantic Ocean and has higher spatial resolution elements (20 - 100 meters (m)) along the northern Gulf of Mexico coast from Louisiana through the Florida Panhandle. The ADCIRC model setup requires the input of topographic and bathymetric elevations at each mesh node. Model inputs in the form of topography and bathymetry and model outputs in the form of water levels and velocities at each mesh node are provided in this data release. For further information regarding model input generation and visualization of model output, refer to Smith and others (2020).
  1. How might this data set be cited?
    Passeri, Davina L., and Smith, Christopher G., 20200601, Effects of Late Holocene Climate and Coastal Change in Mobile Bay, Alabama: ADCIRC Model Input and Results (Velocity_Residual_RS_MP_PH): U.S. Geological Survey Data Release doi:10.5066/P9WGJO0S, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -97.8570
    East_Bounding_Coordinate: -59.9440
    North_Bounding_Coordinate: 45.8370
    South_Bounding_Coordinate: 7.9130
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 13-May-2020
    Currentness_Reference:
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Raster digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference: Gulf of Mexico
      This is a Raster data set. It contains the following raster data types:
      • Dimensions 4020603 x 1 x 1, type Grid Cell
    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 0.0197905613. Longitudes are given to the nearest 0.0226048392. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodectic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.25722210100002.
      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Datum_Name: North American Vertical Datum of 1988
      Altitude_Resolution: 0.0001
      Altitude_Distance_Units: meter
      Altitude_Encoding_Method: Attribute values
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview:
    The Climate and Forecast (CF)-compliant metadata in the header of the NetCDF file provides spatial information for projecting the data into a GIS. It also provides information about the conventions used for attributes in the dataset.
    Entity_and_Attribute_Detail_Citation:
    The entity and attribute information were 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)
    • Davina L. Passeri
    • Christopher G. Smith
  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 Region
    Attn: Davina Passeri
    Research Oceanographer
    600 4th Street South
    St. Petersburg, FL
    US

    727-502-8014 (voice)
    727-502-8001 (FAX)
    dpasseri@usgs.gov

Why was the data set created?

These data were generated for the ADCIRC model to examine the effects of Holocene geomorphic configurations on astronomic tides in Mobile Bay, AL. Velocity_Residual_RS_MP_PH.zip is a dataset consisting of Federal Geographic Data Committee (FGDC) metadata and a Network Common Data Form (NetCDF) file containing the following variables: coordinates of the model grid (longitude and latitude) and the velocity residuals (x-direction and y-direction), in meters per second (m/s) for the reference scenario with the Morgan Peninsula breach and with Pass aux Herons land bridge.

How was the data set created?

  1. From what previous works were the data drawn?
    EF45 inputs (source 1 of 1)
    Passeri, D.L., Hagen, S.C., Plant, N.G., Bilskie, M.V., Medeiros, S.C., and Alizad, K., 20160404, Tidal hydrodynamics under future sea level rise and coastal morphology in the northern Gulf of Mexico: Earth's Future Volume 4, Issue 5, pg. 159-176.

    Online Links:

    Type_of_Source_Media: Online digital data
    Source_Contribution:
    Initial model unstructured finite element mesh, inputs and boundary conditions.
  2. How were the data generated, processed, and modified?
    Date: 2018 (process 1 of 3)
    The ADCIRC model with EF45 inputs was used to simulate astronomic tides. Model setup is outlined in Smith and others (2020). Boundary conditions in the form of tidal harmonic constituents are described in Passeri and others (2016). The velocity residuals were output at the end of the simulation for each scenario. Values of -99999 indicate no data. Person who carried out this activity:
    Davina Passeri
    U.S. Geological Survey
    Research Oceanographer
    600 4th Street S
    St. Petersburg, FL
    USA

    (727)-502-8014 (voice)
    (727)-502-8001 (FAX)
    dpasseri@usgs.gov
    Date: 2020 (process 2 of 3)
    Modeled velocity residual output was extracted using functions within Aquaveo's Surface-water Modeling System (SMS) 12.0 software. The velocity residual output was then packaged into a NetCDF file using functions available in Mathworks MATLAB (R2017a) for inclusion in this data release. Person who carried out this activity:
    Davina Passeri
    U.S. Geological Survey
    Research Oceanographer
    600 4th Street S
    St. Petersburg, FL
    USA

    (727)-502-8014 (voice)
    (727)-502-8001 (FAX)
    dpasseri@usgs.gov
    Date: 13-Oct-2020 (process 3 of 3)
    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)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Luettich, Jr., R.A., Westerink, J.J., and Scheffner, N.W., November 1992, ADCIRC: An advanced three-dimensional circulation model for shelves, coasts and estuaries, Report I: Theory and methodology of ADCIRC-2DDI and ADCIRC-3DL: U.S. Army Corps of Engineers, Washington, DC.

    Online Links:

    Smith, C.G., Osterman, L.E., Jones, M.C., and Passeri, D.L., 20200512, Using multiple environmental proxies and hydrodynamic modeling to investigate Late Holocene climate and coastal change within a large Gulf of Mexico estuarine system (Mobile Bay, Alabama, USA): Marine Geology Unknown.

    Online Links:

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?
    This dataset contains the model geospatial information and velocity residuals for the reference scenario with the Morgan Peninsula breach and Pass aux Herons land bridge. Within the ADCIRC model, the coordinates are provided in decimal degrees using the North American Datum of 1983 (NAD83) geographic coordinate system; velocity residuals in the x-direction and y-direction are provided in m/s.
  3. How accurate are the heights or depths?
    The vertical datum used for the elevation data is the North American Vertical Datum of 1988 (NAVD88) with an estimated resolution of 0.01 m.
  4. Where are the gaps in the data? What is missing?
    These are the complete velocity residuals for the reference scenario with the Morgan Peninsula breach and Pass aux Herons land bridge. 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 resultant velocity residuals are supplied at each node of the unstructured finite element model mesh and serve as an output for the reference scenario with the Morgan Peninsula breach and Pass aux Herons land bridge.

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:
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 Region
    Attn: Davina Passeri
    Research Oceanographer
    600 4th Street South
    St. Petersburg, FL
    US

    727-502-8014 (voice)
    727-502-8001 (FAX)
    dpasseri@usgs.gov
  2. What's the catalog number I need to order this data set? Velocity_Residual_RS_MP_PH.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: Velocity_Residual_RS_MP_PH.nc is a NetCDF file that contains the velocity residual, in m/s, at each mesh node with coordinate information, in decimal degrees, for the reference scenario with the Morgan Peninsula breach and Pass aux Herons land bridge. in format NetCDF (version 4.3.3.1)
      Network links: https://coastal.er.usgs.gov/data-release/doi-P9WGJO0S/data/Velocity_Residual_RS_MP_PH.zip
    • Cost to order the data: None.

Who wrote the metadata?

Dates:
Last modified: 03-Jan-2022
Metadata author:
Davina Passeri
U.S. Geological Survey, USGS Southeast Area
Research Oceanographer
600 4th Street South
St. Petersburg, FL
US

727-502-8014 (voice)
727-502-8001 (FAX)
dpasseri@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/Velocity_Residual_RS_MP_PH_metadata.faq.html>
Generated by mp version 2.9.50 on Mon Jan 3 14:02:28 2022