CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 coastal squeeze projections

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Frequently anticipated questions:


What does this data set describe?

Title:
CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 coastal squeeze projections
Abstract:
Projected coastal squeeze derived from CoSMoS Phase 2 shoreline change and cliff retreat projections. Projected coastal squeeze extents illustrate the available area between shoreline (mean high water; MHW) positions and man-made structures and barriers (referred to as non-erodible structures) or cliff-top retreat, as applicable, for a range of sea-level rise scenarios. The coastal squeeze polygons include results from the Coastal Storm Modeling System (CoSMoS) shoreline change (CoSMoS-COAST; Vitousek and others, 2017; available at https://www.sciencebase.gov/catalog/item/57f426b9e4b0bc0bec033fad) and cliff retreat models (Limber and others, 2015; available at https://www.sciencebase.gov/catalog/item/57f4234de4b0bc0bec033f90) using future wave-climate conditions derived from Global Climate Models (GCMs). Coastal squeeze areas are identified and defined from combined model projections, using model scenarios where erosion was limited by non-erodible structures (for shoreline change models) and armoring (for cliff retreat models; both cliff and shoreline cases referred to as 'hold the line') and where no beach-nourishment was included. Coastal squeeze projections are defined for each sea-level rise scenario. Shoreline change and cliff retreat model details and data sources are outlined in CoSMoS_3.0_Phase_2_Southern_California_Bight:_Summary_of_data_and_methods (available at https://www.sciencebase.gov/catalog/file/get/57f1d4f3e4b0bc0bebfee139?name=CoSMoS_SoCalv3_Phase2_summary_of_methods.pdf). Phase 2 data for Southern California include information for the coast from the border of Mexico to Pt. Conception. Please read the Summary of methods and inspect output carefully. Data are complete for the information presented.
Supplemental_Information:
This work is one portion of ongoing modeling efforts for California and the western United States. For information on data sources and details on methodology, see https://www.sciencebase.gov/catalog/file/get/57f1d4f3e4b0bc0bebfee139?name=CoSMoS_SoCalv3_Phase2_summary_of_methods.pdf. For more information on CoSMoS implementation, see https://walrus.wr.usgs.gov/coastal_processes/cosmos/
  1. How might this data set be cited?
    Barnard, Patrick, Erikson, Li, Foxgrover, Amy, O'Neill, Andrea, and Lovering, Jessica, 2017, CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 coastal squeeze projections: data release DOI:10.5066/F7T151Q4, U.S. Geological Survey, Pacific Coastal and Marine Science Center Santa Cruz, California.

    This is part of the following larger work.

    Barnard, Patrick L, Erikson, Li H, Foxgrover, Amy C, Limber, Patrick W, O'Neill, Andrea C, and Vitousek, Sean, 2018, Coastal Storm Modeling System (CoSMoS) for Southern California, v3.0, Phase 2: data release doi:10.5066/F7T151Q4, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -120.81115722553
    East_Bounding_Coordinate: -116.66931152258
    North_Bounding_Coordinate: 34.687068180405
    South_Bounding_Coordinate: 32.546444355161
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 10-Dec-2015
    Ending_Date: 30-Jun-2017
    Currentness_Reference:
    oldest dataset used through publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Storm-hazard projections in shapefile formats
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set.
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 11
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -100.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000
      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 2.000000
      Ordinates (y-coordinates) are specified to the nearest 2.000000
      Planar coordinates are specified in meters
      The horizontal datum used is North American Datum 1983 (NSRS2007).
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: NAVD88
      Depth_Resolution: 2.0
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Implicit coordinate
  7. How does the data set describe geographic features?
    CoSMoS v3.0 Phase 2 coastal squeeze
    CoSMoS Phase 2 projections (Source: originators at United States Geological Survey, Pacific Coastal and Marine Science Center)
    area of coastal squeeze, between projected shoreline (MHW) and non-erodible structure or cliff retreat, for given sea-level rise (SLR) value
    coastal area between projected shoreline and non-erodible structure or projected cliff retreat (Source: model derived) geographic extent of projected coastal squeeze for sea-level rise indicated

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Patrick Barnard
    • Li Erikson
    • Amy Foxgrover
    • Andrea O'Neill
    • Jessica Lovering
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Erikson, Li
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    2885 Mission Street
    Santa Cruz, CA
    USA

    831-460-7563 (voice)
    831-427-4748 (FAX)
    lerikson@usgs.gov

Why was the data set created?

These data are intended for policy makers, resource managers, science researchers, students, and the general public. These data can be used with geographic information systems or other software to identify and assess possible areas of vulnerability. These data are not intended to be used for navigation.

How was the data set created?

  1. From what previous works were the data drawn?
    Summary of methods (source 1 of 3)
    Barnard, Patrick, Erikson, Li, Foxgrover, Amy, O'Neill, Andrea, and Herdman, Liv, 2017, CoSMoS_3.0_Phase_2_Southern_California_Bight:_Summary_of_data_and_methods: U.S. Geological Survey, Pacific Coastal and Marine Science Center Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    Complete explanation of data and methodology used to create model
    Model projections, metadata, and methods (source 2 of 3)
    Vitousek, Sean, and Barnard, Patrick, 2016, CoSMoS (Coastal Storm Modeling System) Southern California v3.0 projections of shoreline change due to 21st century sea-level rise: U.S. Geological Survey, Pacific Coastal and Marine Science Center Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution: Model projections
    Model projections, metadata, and methods (source 3 of 3)
    Limber, Patrick, and Barnard, Patrick, 2016, CoSMoS (Coastal Storm Modeling System) Southern California v3.0 Phase 2 projections of coastal cliff retreat due to 21st century sea-level rise: U.S. Geological Survey, Pacific Coastal and Marine Science Center Santa Cruz, California.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution: Model projections
  2. How were the data generated, processed, and modified?
    Date: 01-Aug-2015 (process 1 of 4)
    Applied CoSMoS-COAST models (Vitousek and others, 2017) to Southern California. See Summary of methods and references for information on model structure and data used.
    Date: 01-Aug-2015 (process 2 of 4)
    Applied cliff retreat models (Limber and others, 2015)to Southern California. See Summary of methods and references for information on model structure and data used.
    Date: 15-May-2017 (process 3 of 4)
    Combined cliff retreat and shoreline change projections for each sea-level rise scenario ('hold the line' and 'no nourishment' cases).
    Date: 14-Aug-2018 (process 4 of 4)
    Metadata was modified to add or correct the Larger_Work section, and to correct the link(s) to the Methods Summary pdf so that it points to the new location of the file. No data information was changed. Person who carried out this activity:
    Susan A Cochran
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Geologist
    2885 Mission Street
    Santa Cruz, CA
    USA

    (831) 460-7545 (voice)
    scochran@usgs.gov
  3. What similar or related data should the user be aware of?
    Vitousek, S, Barnard, P. L., Limber, P., Erikson, L. H., and Cole, B., 2017, A model integrating longshore and cross-shore processes for predicting long-term shoreline response to climate change.

    Other_Citation_Details:
    Vitousek, S., Barnard, P. L., Limber, P., Erikson, L. H., and Cole, B.,2017, A model integrating longshore and cross-shore processes for predicting long-term shoreline response to climate change, Journal of Geophysical Research Earth Surface, 122, doi:10.1002/2016JF004065
    Limber, P., Barnard, P. L., and Hapke, C., 2015, Towards projecting the retreat of California's coastal cliffs during the 21st century.

    Other_Citation_Details:
    Limber, P., Barnard, P.L., and Hapke, C., 2015, Towards projecting the retreat of California's coastal cliffs during the 21st century. The Proceedings of the Coastal Sediments 2015, World Scientific

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

  1. How well have the observations been checked?
    Attribute values are illustrations of coastal squeeze due to plausible sea-level rise and future-wave climate conditions and therefore cannot be validated against observations. The projections were generated using the latest downscaled climate projections for Southern California.
  2. How accurate are the geographic locations?
    Data are concurrent with topobathymetric DEM locations.
  3. How accurate are the heights or depths?
    N/A
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented. Users are advised to read the metadata record and Summary of methods carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    Data have undergone quality checks and meet standards.

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? File (CoSMoS_v3_Phase2_coastal_squeeze.zip) contains projections for sea-level rise indicated.
  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: 14-Aug-2018
Metadata author:
Andrea O'Neill
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Oceanographer
2885 Mission Street
Santa Cruz, CA
USA

831-460-7586 (voice)
831-427-4748 (FAX)
aoneill@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/cosmos/CoSMoS_3.0_Phase2_coastal_squeeze_projections.faq.html>
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