Methane Fluxes from Shorelines and Differing Surfaces, Big Trail Lake, Alaska, 2019 : Arctic-Boreal Vulnerability Experiment (ABoVE)

• Main Authors: Elder, C., Hasson, N., Hanke, P., Wright, S., Anthony, K.W., Miller, C.E.
• Format: Article in Journal/Newspaper
• Language: English
• Published: ORNL Distributed Active Archive Center 2021
• Subjects: CLIMATE INDICATORS, PALEOCLIMATE INDICATORS, PERMAFROST/METHANE RELEASE,; BIOSPHERE, ECOSYSTEMS, FRESHWATER ECOSYSTEMS, LAKE/POND; FIELD SURVEYS, GAS SENSORS; lake shorelines; methane hotspots; methane flux; thermokarst lakes; permafrost thaw; Arctic; Fairbanks; Trail Lake; permafrost; Thermokarst; Alaska
• Online Access: https://dx.doi.org/10.3334/ornldaac/1870; https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1870

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