ABoVE: Methane Flux across Two Thermokarst Lake Ecosystems, Interior Alaska, 2018 : Arctic-Boreal Vulnerability Experiment (ABoVE)

• Main Authors: Elder, C., Hanke, P., Anthony, K.W., Thompson, D.R., Miller, C.E., Thorpe, A.K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: ORNL Distributed Active Archive Center 2020
• Subjects: BIOSPHERE > VEGETATION > PLANT CHARACTERISTICS; TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS; ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > METHANE; FIELD SURVEYS > GPS; FIELD SURVEYS > CO2 ANALYZERS; FIELD SURVEYS > GAS SENSORS; FIELD SURVEYS > SPECTROMETERS; grasses; reeds; plant aerenchymous tissues; littoral zone; Goldstream Valley Ak; CH4; Li-Cor LI7700 methane analyzer; Arctic; Fairbanks; Thermokarst; Alaska
• Online Access: https://dx.doi.org/10.3334/ornldaac/1778; https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1778

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).