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

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).