Methane concentrations from subarctic lakes on the Stordalen Mire, Abisko, Northern Sweden

Joachim Jansen, Martin Wik, Patrick Crill

This dataset provides concentration measurements of dissolved methane (CH₄), a strong climate forcing trace gas, in the water column of three subarctic lakes located on the Stordalen Mire in northern Sweden.

Water samples were collected during the ice-free seasons of 2009 to 2017, approximately every 1⁠ – ⁠2 weeks, from different locations in the lakes, as well as from the stream feeding the Mire. The lakes are small (surface area 0.010⁠ – ⁠0.17 km²) and shallow (max. depth 1.3⁠ – ⁠6.7 m), and are structural features of the landscape (i.e. non-thermokarst). Samples were collected from surface water, as well as in depth profiles at the deepest points of the lakes. Gas concentrations were measured on a gas chromatograph using the headspace method. Paired measurements of surface sediment and water temperature are also provided. Few freshwater CH₄ datasets have a similarly high resolution or duration.

The measurements have been used to assess the environmental drivers of CH₄ emissions from lakes to the atmosphere, and how emissions might change under continued Arctic warming.

Citation

Joachim Jansen, Martin Wik, Patrick Crill (2020) Methane concentrations from subarctic lakes on the Stordalen Mire, Abisko, Northern Sweden. Dataset version 1. Bolin Centre Database. https://doi.org/10.17043/stordalen-lakes-ch4-conc-1

References

Jansen J, Thornton BF, Cortés A, Snöälv J, Wik M, MacIntyre S, Crill PM. (2020). Drivers of diffusive CH₄ emissions from shallow subarctic lakes on daily to multi-year timescales. Biogeosciences, 17, 1911⁠ – ⁠1932. https://doi.org/10.5194/bg-17-1911-2020

Data description

This dataset consists of two .csv files (data), one .png file (map of the sampling locations) and one .rtf file (readme).

File Stordalen_lakes_CH4_surface.csv has eight data columns:

• Lake
• Sampling location
• Sampling depth (m)
• Day of year (DOY)
• Sampling date and time (UTC+2)
• Concentration (µmol CH₄ / L)
• Surface sediment temperature (°C)
• Surface water temperature (°C)

File Stordalen_lakes_CH4_profiles.csv has six data columns:

• Lake
• Sampling location
• Sampling depth (m)
• Day of year (DOY)
• Sampling date and time (UTC+2)
• Concentration (µmol CH₄ / L)

Comments

Please, cite both the dataset itself and the publication by Jansen et al. (2020) when using this dataset. The principal investigators (Joachim Jansen and Patrick Crill) would also welcome to receive a notification when the data are used in any publication or derivative work.

Alternative contact person: [javascript protected email address], Department of Geological Sciences, Stockholm University.