TY - GEN T1 - ABoVE: Methane Flux across Two Thermokarst Lake Ecosystems, Interior Alaska, 2018 AU - Elder, C. AU - Hanke, P. AU - Anthony, K.W. AU - Thompson, D.R. AU - Miller, C.E. AU - Thorpe, A.K. DO - 10.3334/ORNLDAAC/1778 UR - https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1778 AB - 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). KW - BIOSPHERE > VEGETATION > PLANT CHARACTERISTICS KW - TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS KW - ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > METHANE KW - FIELD SURVEYS > GPS KW - FIELD SURVEYS > CO2 ANALYZERS KW - FIELD SURVEYS > GAS SENSORS KW - FIELD SURVEYS > SPECTROMETERS KW - grasses KW - reeds KW - plant aerenchymous tissues KW - littoral zone KW - Goldstream Valley Ak KW - CH4 KW - Li-Cor LI7700 methane analyzer PY - 2020 PB - ORNL Distributed Active Archive Center LA - en SN - https://daac.ornl.gov/cgi-bin/dataset_lister.pl?p=34 ER -