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    • Continuous, underwater profiles of ultraviolet (UV), PAR irradiance, and temperature observations with surface reference measurements collected from the R/V LAURENTIAN and other small boats in the Lake Huron in the Great Lakes region from 2022-05-10 to 2022-07-08 (NCEI Accession 0278926)

    Metadata Updated: May 1, 2025

    NOAA Great Lakes Environmental Research Laboratory (GLERL) samples and studies the ecosystem of the lower food web of the Laurentian Great Lakes. This collection contains continuous, underwater ultraviolet (UV), PAR and temperature profiles at 5 stations during the open water season in Lake Huron in 2022. The measurements were collected using a Biospherical Instruments Inc. PUV-2500 submersible, multichannel, profiling, ultraviolet radiometer and PUV2510 reference radiometer attached to the ship during profile collection. UV measurements are in units of microwatts per square centimeter at wavelength (µW/(cm²nm)), PAR measurements are in the units of microEinsteins per square centimeters per second (µE/(cm²sec)) and temperature are in the units of degrees Celsius. Chlorophyll measurements were collected with the instrument, but not included in this data package because the instrument was not calibrated for these locations. The instrument was calibrated for dark offsets as described in the instrument manual on each day the instrument was deployed.

    Two summary tables are included in this accession summarizing the attenuation coefficients (Kd) and the 1% attenuation depth. The attenuation coefficients (Kd) were calculated as the slope of the linear regression of the natural logarithm of the ratio_uv versus depth, as described by Kirk (1994). The 1% attenuation depth was calculated using the Kd and intercept from the linear regression of the natural logarithm of the ratio_uv versus depth as: (ln(0.01)-Intercept)/Kd. Only data above 1% of the ambient irradiance were used in these calculations.

    Blank cells indicate no data.

    The data table column headings and units are described in detail in the data dictionary file named “noaa-glerl-uv-data-dictionary-2022.csv”. File formats included in this data package are .csv and jpg.

    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 2025-04-03T22:01:23Z
    Metadata Created Date June 10, 2023
    Metadata Updated Date May 1, 2025
    Reference Date(s) July 12, 2023 (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 2025-04-03T22:01:23Z
    Metadata Created Date June 10, 2023
    Metadata Updated Date May 1, 2025
    Reference Date(s) July 12, 2023 (publication)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0278926
    Access Constraints Cite as: Vanderploeg, Henry; Glyshaw, Paul; NOAA Great Lakes Environmental Research Laboratory (2023). Continuous, underwater profiles of ultraviolet (UV), PAR irradiance, and temperature observations with surface reference measurements collected from the R/V LAURENTIAN and other small boats in the Lake Huron in the Great Lakes region from 2022-05-10 to 2022-07-08 (NCEI Accession 0278926). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0278926. 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 -82.8
    Bbox North Lat 44.8
    Bbox South Lat 43.66
    Bbox West Long -83.807
    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:0278926
    Graphic Preview Type PNG
    Harvest Object Id 11eeaab8-84aa-4b35-8d28-e5431feb4a51
    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": [[[-83.807, 43.66], [-82.8, 43.66], [-82.8, 44.8], [-83.807, 44.8], [-83.807, 43.66]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2022-05-10
    Temporal Extent End 2022-07-08

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