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Storflaket, Abisko

Subarctic peatland

68°20´51´´ N
18°57´55´´ E (tower coordinates)
383 m asl (tower)

Storflaket, Abisko

Site description

The mire 'Storflaket' covers approximately 13 ha. Storflaket is a peat plateau, upraised by the freezing process and characterized by relatively thin peat layer underlain by silty sediments. The uppermost 50 cm of the peat is fairly homogenous peat, while the underlying layer, reaching down to 90 cm depth is composed by a mixture of peat and silt material. A wet zone (water table above surface) crosses the mire, dividing Storflaket into two parts. Each part is dry, but with shallow ground settings that contribute to a variation in soil moisture. A narrow wet zone runs along the edge of the peat plateau. Maximum active layer thickness, measured in September, is approximately 50 cm in the dry, elevated parts. However, in the hollows and wetter parts, the active layer may be thicker than 1 m. Storflaket is surrounded by low hills, vegetated by birch and willow forest, tall shrubs and heat vegetation. A highway and a railway running in the east-westerly direction separate the mire from two nearby mires of similar character.

Vegetation

Dry areas characterized by heath vegetation with dwarf shrubs, graminoids and mosses. Wet areas typically vegetated by wetland vegetation such as sphagnum and graminoids. Dominant species are Empetrum nigrum, Vaccinium uliginosum, Eriophorum vaginatrum, Betula nana, Andromeda polifolia, Sphagnum mosses and lichens.

Soil

Peat, peat mixed with silt material and silty sediments.

Measurements

CO2 and CH4 fluxes measured weekly during June-October on snow experimental plots, species inventories conducted yearly (mid July) on both snow and nutrient experimental plots

Treatments within the CARBO-Extreme project

  • Increased snow depth and length of snow season
  • increased nutrient load

Related projects

Climate Change / Adaptation Project in Abisko

Pictures

Storflaket1 Storflaket3 Storflaket4 Storflaket5 Storflaket Bosioe 2

Contact

Julia Bosiö
Department of Physical Geography and Ecosystems Analysis
Sölvegatan 12
223 62 Lund
Sweden
Julia.Bosio@nateko.lu.se

References

Åkerman HJ, Johansson M (2008) Thawing permafrost and thicker active layers in sub-arctic Sweden. Permafrost and Periglacial Processes, 19, 279-292.
Johansson, M., Callaghan, T.V., Åkerman, H.J., Jackowicz-Korczynski, M., Christensen, T.R., (Submitted) Rapid response of active layer thickness and vegetation greenness in sub-arctic Sweden to experimentally increased snow cover. Submitted to Arctic, Antarctic and Alpine Research.


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