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    • In-situ particle size distribution, volume concentration, and other measurements collected from profiled LISST-200X sensor throughout the Bedford Basin during the Halifax Joint Learning Opportunity from 2024-09-25 to 2025-03-11 (NCEI Accession 0304370)

    Metadata Updated: December 2, 2025

    This dataset contains time-series profiled measurements from a LISST-200X sensor (Sequoia Scientific, Inc.) collected during an ocean alkalinity enhancement (OAE) field trial conducted by Planetary Technologies in collaboration with Dalhousie University in Halifax, Nova Scotia, Canada. This dataset was collected under a Joint Learning Opportunity (JLO) funded by Carbon to Sea and COVE.

    The sensor was deployed to provide direct, in-situ measurements of particles and particle properties (e.g., size, concentration) to (1) address open questions related to alkaline feedstock transport and fate, as well as environmental impacts from alkalinity dosing (e.g., secondary precipitation), and (2) support the refinement and validation of models used to predict alkaline feedstock transport and dissolution kinetics.

    The LISST-200X was profiled at different locations and times throughout the Bedford Basin and surrounding waters from September 2024 to March 2025, both in and out of the mixing zone where alkalinity was being dosed. Profiling was performed during the approximately biweekly boat surveys conducted throughout the trial. The sensor measured particle size distribution, mean particle diameter, volume concentration, beam attenuation, and other variables. Additional information about the sensor deployment, profile locations, measurement parameters, data format, and processing can be found in the included supplemental document.

    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 2025-11-13T13:09:46Z
    Metadata Created Date June 1, 2025
    Metadata Updated Date December 2, 2025
    Reference Date(s) May 19, 2025 (publication)
    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 2025-11-13T13:09:46Z
    Metadata Created Date June 1, 2025
    Metadata Updated Date December 2, 2025
    Reference Date(s) May 19, 2025 (publication)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0304370
    Access Constraints Cite as: Simon, Kirby H.; Miller, Carl; Becker, Jeshua; Atamanchuk, Dariia; Mikkelsen, Ole (2025). In-situ particle size distribution, volume concentration, and other measurements collected from profiled LISST-200X sensor throughout the Bedford Basin during the Halifax Joint Learning Opportunity from 2024-09-25 to 2025-03-11 (NCEI Accession 0304370). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/v9f7-4t88. 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 -63.545167
    Bbox North Lat 44.720183
    Bbox South Lat 44.615267
    Bbox West Long -63.6682
    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:0304370
    Graphic Preview Type PNG
    Harvest Object Id 6b46ef20-c543-4490-a2ba-05fb831ca2fd
    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": [[[-63.6682, 44.615267], [-63.545167, 44.615267], [-63.545167, 44.720183], [-63.6682, 44.720183], [-63.6682, 44.615267]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2024-09-25
    Temporal Extent End 2025-03-11

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