Methane Fluxes from Shorelines and Differing Surfaces, Big Trail Lake, Alaska, 2019

Description

This dataset provides methane fluxes from hot-spot and non-hot spot differing surfaces at Big Trail Lake (BTL) in the Goldstream Valley near Fairbanks, AK, USA. Measurements were taken at a remotely-sensed methane hotspot on the shoreline of a pond, adjacent to BTL with a Los Gatos Ultra-Portable Greenhouse Gas Analyzer (UGGA), and from various non-hotspot surfaces representative of the broader thermokarst lake ecosystem with bucket chambers. All data were collected between 2019-07-04 and 2019-12-04 during the daytime hours of 09:35-17:32 local time. A ground-based CH4 enhancement survey was performed on 2019-07-06 between 13:25-17:15 Alaska Daylight Time (AKDT), approximately two hours following an AVIRIS-NG overflight and hotspot detection at the Eastside Pond. Methane flux is reported in units of both mmol CH4 m-2 hr-1 and mg CH4 m-2 d-1. Flux errors are quantified for each

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%2F1870
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/above/CH4_Fluxes_ThermokarstLakes_AK/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/CH4_Fluxes_ThermokarstLakes_AK.html
21 ABoVE project site https://above.nasa.gov
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/1870
33 Methane Fluxes from Shorelines and Differing Surfaces, Big Trail Lake, Alaska, 2019: CH4_Fluxes_ThermokarstLakes_AK.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/CH4_Fluxes_ThermokarstLakes_AK/comp/CH4_Fluxes_ThermokarstLakes_AK.pdf
34 Chambers used to measure diffusive CH4 fluxes. a) Large chamber resting on the pre-installed aluminum collar, sealed on edges with pipe insulation. b) Five-gallon (18.9-liter) bucket with an open bottom and air-tight screw lid to measure hotspot flux locations. https://daac.ornl.gov/ABOVE/guides/CH4_Fluxes_ThermokarstLakes_AK_Fig1.png

Tags

  • climate-indicators
  • ecosystems
  • biosphere
  • paleoclimate-indicators
  • earth-science

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