This dataset summarizes methane emission rates and relationships with biophysical variables. This dataset is associated with the following publication: Waldo, S., J. Beaulieu, W. Barnett, A. Balz, M. Vanni, T. Williamson, and J. Walker. Temporal trends in methane emissions from a small eutrophic reservoir: the key role of a spring burst. Biogeosciences. Copernicus Publications, Katlenburg-Lindau, GERMANY, 18(19): 5291-5311, (2021).

Projected global methane emissions from lakes and reservoirs under scenarios of enhance eutrophication. This dataset is associated with the following publication: Beaulieu, J., T. DelSontro, and J. Downing. Eutrophication will increase methane emissions from lakes and impoundments during the 21st century. Nature Communications. Nature Publishing Group, London, UK, 10(1375): 1-5, (2019).

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

Data on diurnal variation in wetland methane flux were collected to 1) improve understanding of short-term, mechanistic drivers of methane flux, and 2) inform sampling protocols to achieve research objectives. An automated gas flux sampling system was used to measure methane flux every 2.5–4 hours for over 230 diel cycles over the course of three growing seasons (2013–2015). Data were collected from a seasonal, depressional wetland located in the Prairie Pothole Region of central North America. These data directly support the associated publication “Diurnal patterns of methane flux from a depressional, seasonal wetland: mechanisms and methodology” which is referenced within the Metadata.

Time series of methane ebullition rates from 9 sites in Harsha Lake, Ohio, from May - Dec 2015. This dataset is associated with the following publication: Beaulieu, J., A. Balz, M. Birchfield, J. Harrison, C. Nietch, M. Platz, S. Waldo, J. Walker, K. White, and J. Young. Effects of an experimental water-level drawdown on methane emissions from a eutrophic reservoir. ECOSYSTEMS. Springer, New York, NY, USA, 21(4): 657-674, (2018).

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).