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    • ABoVE: Methane Flux across Two Thermokarst Lake Ecosystems, Interior Alaska, 2018

    Metadata Updated: December 7, 2023

    This dataset provides diffusive methane (CH4) fluxes collected from two thermokarst lakes in the Goldstream Valley, north of Fairbanks in interior Alaska. Fluxes were collected from the littoral zones, adjacent shoreline, and upland vegetation. The data were collected during July 2018. Measurements were made using a mobile, closed chamber technique where chamber air was recirculated through a Los Gatos Research (LGR) Ultraportable Cavity Ring-down Spectrometer. The chamber was large enough to enclose emergent and upland vegetation up to 1.5 m in height, allowing plant-facilitated fluxes to be measured. These in situ measurements were used to verify spatial patterns in methane flux (i.e., exponential decay with distance from water) detected by NASA's Next Generation Airborne Visible/Infrared Imaging Spectrometer (AVIRIS-NG).

    Access & Use Information

    Public: This dataset is intended for public access and use. 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.

    Downloads & Resources

    Dates

    Metadata Created Date December 1, 2022
    Metadata Updated Date December 7, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Photo of the custom-built chamber for measuring in situ trace gas fluxes from soil/vegetation and water surfaces (with flotation). The chamber (0.71 m x 0.71 m x 1.07 m = 0.533 m3) provides adequate height to enclose emergent grasses and reeds. The chamber is connected by tubing to a Los Gatos Ultra-Portable Greenhouse Gas Analyzer capable of measuring trace gasses at 1 Hz in recirculating air. Photo courtesy C. Elder.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date December 1, 2022
    Metadata Updated Date December 7, 2023
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2143402530-ORNL_CLOUD
    Data First Published 2020-06-26
    Language en-US
    Data Last Modified 2023-06-12
    Category ABoVE, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Elder, C., P. Hanke, K.W. Anthony, D.R. Thompson, C.E. Miller, and A.K. Thorpe. 2020. ABoVE: Methane Flux across Two Thermokarst Lake Ecosystems, Interior Alaska, 2018. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1778
    Graphic Preview Description Photo of the custom-built chamber for measuring in situ trace gas fluxes from soil/vegetation and water surfaces (with flotation). The chamber (0.71 m x 0.71 m x 1.07 m = 0.533 m3) provides adequate height to enclose emergent grasses and reeds. The chamber is connected by tubing to a Los Gatos Ultra-Portable Greenhouse Gas Analyzer capable of measuring trace gasses at 1 Hz in recirculating air. Photo courtesy C. Elder.
    Graphic Preview File https://daac.ornl.gov/ABOVE/guides/CH4_Flux_BigTrail_Goldstream_Fig1.png
    Harvest Object Id e85cf3cb-c412-4abb-86e2-c91df0e2b324
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/1778
    Metadata Type geospatial
    Old Spatial -147.85 64.92 -147.82 64.92
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 50bf5fe3bfd951d99cd337f970a8f67e3e55b83dcebd3e22b2e5c6c170323829
    Source Schema Version 1.1
    Spatial
    Temporal 2018-07-17T00:00:00Z/2018-07-29T23:59:59Z

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