Soil and incubation data of permafrost-affected soils in Samoylov, 2011 & 2013

Walz, Josefine; Knoblauch, Christian; Böhme, Luise; Pfeiffer, Eva-Maria

The effects of oxygen availability, freezing and thawing, temperature, and labile organic matter (OM) additions on greenhouse gas production were studied in northeast Siberian polygonal tundra soils, including the seasonally thawed active layer and upper perennially frozen permafrost. Soils were incubated at constant temperatures of 1 °C, 4 °C, or 8 °C for up to 150 days. CO2 production in surface layers was three times higher than in the deeper soil. Under anaerobic conditions, SOM decomposition was 2-6 times lower than under aerobic conditions and more CO2 than CH4 was produced. CH4 contributed less than 2% to anaerobic decomposition in thawed permafrost but more than 20% in the active layer. A freeze-thaw cycle caused a short-lived pulse of CO2 production directly after re-thawing. Q10 values, calculated via the equal-carbon method, increased with soil depth from 3.4 ± 1.6 in surface layers to 6.1 ± 2.8 in the permafrost. The addition of plant-derived labile OM (13C-labelled Carex aquatilis leaves) resulted in an increase in SOM decomposition only in permafrost (positive priming).

The data files give laboratory data on three active layer and permafrost soils from the northeast Siberian Arctic tundra on Samoylov. The files contain CO2 and CH4 production in several incubations under aerobic and anaerobic conditions, at different temperatures, and with or without the additions of labile organic matter.

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Josefine Walz

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Additional Info

Field Value
Identifier DOI: 10.1594/PANGAEA.864866,
Project(s)
Institute University of Hamburg
Source https://doi.pangaea.de/10.1594/PANGAEA.864866
Publication Date 2016
Version 1.0
Product Aerobic and anaerobic CO2 and CH4 production
Sensor GC 7890 gas chromatograph
Files
  1. Walz_2016.zip
Variables [Units]
  1. Depth soil: Soil depth [m]
  2. Depth soil min: Minimum soil depth [m]
  3. Depth soil max: Maximum soil depth [m]
  4. Comment (Comment)
  5. DOE: Day of experiment [day]
  6. CO2-C/SOC aerob: Aerobic carbon dioxide production, CO2-C per mass soil organic carbon [mg/g]
  7. CO2 prod aerob std dev: Aerobic carbon dioxide production, standard deviation [±]
  8. Latitude: [°N]
  9. Longitude: [°E]
  10. Depth soil: Soil depth [m]
  11. pH soil
  12. δ13C Corg: δ13C, organic carbon [‰ PDB]
  13. Layer: Layer description
  14. CO2 prod aerob DW: Aerobic carbon dioxide production, CO2-C per unit dry weight [mg/g]
  15. CO2 prod aerob DW std dev: Aerobic carbon dioxide production, CO2-C per unit dry weight standard deviation [±]
  16. CO2-C/SOC anaerob: Anaerobic carbon dioxide production, CO2-C per mass soil organic carbon [mg/g]
  17. CO2 prod anaerob std dev: Anaerobic carbon dioxide production standard deviation [±]
  18. CO2-C/SOC rate anaerob: Anaerobic carbon dioxide production rate, CO2-C per mass soil organic carbon [mg/g/day]
  19. CO2-C/SOC rate anaerob std dev: Anaerobic carbon dioxide production rate standard deviation, CO2-C per mass soil organic carbon [±]
  20. CH4-C/SOC anaerob: Anaerobic methane production, CH4-C per mass soil organic carbon [mg/g]
  21. CH4-C/SOC anaerob std dev: Anaerobic methane production standard deviation, CH4-C per mass soil organic carbon [mg/g]
  22. CH4-C/SOC rate anaerob: Anaerobic methane production rate, CH4-C per mass soil organic carbon [mg/g/day]
  23. CH4-C/SOC rate anaerob std dev: Anaerobic methane production rate standard deviation, CH4-C per mass soil organic carbon [±]
Region Samoylov Island, Lena River Delta
Spatial Reference
Spatial Resolution Point based
Spatial Coverage Latitude: 72.373701; Longitude: 126.492590
Temporal Coverage 2011-04-01 & 2013-05-01
Temporal Resolution Discrete
Format TXT
Is Supplement To

Walz, Josefine; Knoblauch, Christian; Böhme, Luise; Pfeiffer, Eva-Maria (2017): Regulation of soil organic matter decomposition in permafrost-affected Siberian tundra soils - Impact of oxygen availability, freezing and thawing, temperature, and labile organic matter. Soil Biology and Biochemistry, 110, 34-43, https://doi.org/10.1016/j.soilbio.2017.03.001
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