Soil methane data from a wildfire chronosequence in northern Sweden ...

• Main Authors: McNamara, N.P., Gregg, R., Oakley, S., Stott, A.
• Format: Dataset
• Language: English
• Published: NERC EDS Environmental Information Data Centre 2015
• Subjects: Sweden; Uddjaure; boreal; chronosequence; flux; process; climate; methane; island; vegetation; soil; biogeochemistry; Soil; Northern Sweden
• Online Access: https://dx.doi.org/10.5285/66cc8fd4-e722-44c4-9363-5930b8373b2c; https://catalogue.ceh.ac.uk/id/66cc8fd4-e722-44c4-9363-5930b8373b2c

Data comprise soil methane oxidation results from a group of 30 forested islands in northern Sweden sampled in 2006 and 2007. The islands have different fire histories and represent a retrogressive chronosequence spanning 5000 years. ... : In situ gas fluxes were measured over one week using a static chamber method during August 2006. Samples were stored in exetainer vials (Labco, UK) for up to one month prior to analyses. Concentrations of CH4 were analysed by gas chromatography, on a PerkinElmer Autosystem XL Gas Chromatograph (GC) with Flame Ionization Detector, and results were calibrated using certified gas standards. CH4 was separated isothermally on a 2 m Poropak Q 50x80 mesh packed column at 40 deg C, with N2 as the carrier gas. CH4 fluxes from ex situ cores were measured from the top 25 cm of soil (or to the bedrock where soil depth was less than 25 cm) in 2006 and then through the entire humus profile to the bedrock (20-85 cm depth) in 2007. In 2006, intact cores (11 cm diameter, 25 cm depth) were removed from each island (40 per island size classification) and were weighed on the day of collection. Cores were stored at 12 deg C in the dark until measurement and were maintained at their field collected moisture content using an ...