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

Description

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).

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F1778
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/CH4_Flux_BigTrail_Goldstream.html
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/above/CH4_Flux_BigTrail_Goldstream/
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/1778
21 ABoVE project site https://above.nasa.gov
33 ABoVE: Methane Flux across Two Thermokarst Lake Ecosystems, Interior Alaska, 2018: CH4_Flux_BigTrail_Goldstream.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/CH4_Flux_BigTrail_Goldstream/comp/CH4_Flux_BigTrail_Goldstream.pdf
34 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. https://daac.ornl.gov/ABOVE/guides/CH4_Flux_BigTrail_Goldstream_Fig1.png

Tags

  • biosphere
  • surface-water
  • atmosphere
  • terrestrial-hydrosphere
  • atmospheric-chemistry
  • vegetation
  • earth-science

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