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    • Marsh vertical accretion, sediment grain size, and Be-7 activity in Coos Bay (Oregon, USA) from 20110101 to 20220330 (NCEI Accession 0291012)

    Metadata Updated: January 1, 2026

    Sediment cores were collected approximately monthly at six locations in tide flats across the Coos estuary (Oregon, USA). Between January 2021 and March 2022, 4 to 11 cores were taken at each site. Cores were collected using a ~15 cm length of aluminum pipe (~10 cm diameter) that was pushed into the tide flat and dug out with a trowel. Cores were then extruded into 1-cm increments and analyzed for grain-size distribution and Be-7 activity on select intervals.

    Between 2011 and 2022, feldspar marker horizons were established at study sites in high and low marshes by placing a thick layer of powdered feldspar onto the marsh surface. Each study site includes three feldspar plots. Approximately annually after plot establishment, small square cores were cut out of the marsh within each feldspar plot using a serrated knife. The distance from the marsh surface to the top of the feldspar layer was measured on all four sides of the core. This process was repeated for each of the three feldspar plots per study site. All 12 measurements (3 cores x 4 sides per core) were averaged to produce a single vertical accretion value per site. Study sites with at least five measurements of vertical accretion in the 5-12 years following feldspar marker horizon plot installation were used to calculate mean vertical accretion rate (linear best-fit).

    The files provided include one csv of marker horizon metadata (latitude, longitude, wetland type, plot installation date) and mean vertical accretion rate; one csv of marker horizon data (sample date, surface height above marker horizon); one csv of median grain size; and one csv of Be-7 activity.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date 2025-05-16T15:37:23Z
    Metadata Created Date February 1, 2025
    Metadata Updated Date January 1, 2026
    Reference Date(s) April 25, 2024 (publication), April 10, 2024 (creation)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Preview graphic

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2025-05-16T15:37:23Z
    Metadata Created Date February 1, 2025
    Metadata Updated Date January 1, 2026
    Reference Date(s) April 25, 2024 (publication), April 10, 2024 (creation)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0291012
    Access Constraints Cite as: Keogh, Molly; Sutherland, David; Eidam, Emily F.; Souza, Tyler; Schmitt, Jenni; Helms, Alicia; Ralston, David (2024). Marsh vertical accretion, sediment grain size, and Be-7 activity in Coos Bay (Oregon, USA) from 20110101 to 20220330 (NCEI Accession 0291012). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/wfzk-ex71. Accessed [date]., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
    Bbox East Long -124.086
    Bbox North Lat 43.464
    Bbox South Lat 43.264
    Bbox West Long -124.364
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Preview graphic
    Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0291012
    Graphic Preview Type PNG
    Harvest Object Id 983403d6-2055-46c8-b173-21b680913654
    Harvest Source Id c084a438-6f6b-470d-93e0-16aeddb9f513
    Harvest Source Title NOAA/NESDIS/ncei/accessions
    Licence accessLevel: Public
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-124.364, 43.264], [-124.086, 43.264], [-124.086, 43.464], [-124.364, 43.464], [-124.364, 43.264]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2011-05-06
    Temporal Extent End 2023-07-19

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