Temporal and spatial differences of methane flux at arctic tundra in Alaska.

The article discusses a study which examined current methane emission and its controlling factors on Alaskan tundra, as well as spatial and temporal differences in methane flux. The study was conducted from mid-June through the end of August 1993 in Barrow, Alaska, while at Happy Valley it was conducted between early June and late August 1995. A gradient method based on the Monin-Obukhov similarity theory was used in this study to determine methane flux. Results of the study showed that 1.85 parts per million (ppm) was the average methane concentration at Happy Valley, while the atmospheric methane concentration at Barrow Station was less than 1.85ppm. Included is a chart showing seasonal changes of daily amount of methane flux and soil temperatures.