Methane fluxes from automated chambers, Global Change Research Wetland, Maryland.

This dataset consists CH4 and CO2 fluxes and related environmental data measured from an automated chamber system in the Smithsonian's Global Change Research Wetland (GCReW), a brackish, microtidal wetland side on a subestuary of the Chesapeake Bay. Fluxes were measured in 12 chambers, from May 2021 through December 2022 to determine the real-time responses of CH4 and CO2 fluxes to environmental fluctuations at temporal scales ranging from hourly to seasonally. The chambers are also distributed across a soil warming gradient, ranging from ambient to 6°C above ambient, that was started in February 2022. The chambers are 1.5 m tall and contain the dominant vegetation species of the site (Schoenoplectus americanus, Spartina patens, and Distichlis spicata). The dataset contains the following files: (1) CH4 and CO2 fluxes from each chamber throughout the measurement period, statistics for each flux, and environmental data (temperature, pressure, humidity) at the time of the flux measurement; (2) 15-minute environmental data for each chamber (e.g. not just during flux measurements); (3) Readme files to explain variable names and sample processing.