Arctic Soil Microcosm Greenhouse Gas and Geochemistry Data Under Nitrogen Treatment

Laboratory microcosm incubations tracked greenhouse gas production and soil porewater geochemistry for 55 days under anaerobic conditions. The dataset contains results from experiments with and without ammonium chloride addition, using soil from the NGEE Arctic Teller Road Site on the Seward Peninsula. Research was conducted by the NGEE Arctic project, supported by the Department of Energy, with soil collected in 2017 and incubations likely occurring in 2018-2019.

Use Cases

• Model the relationship between nitrogen addition (NH4Cl treatment) and greenhouse gas concentration time-series from headspace measurements.
• Analyze correlations between porewater geochemistry features (from ultrapure water and KCl extracts) and gas production rates across the 55-day incubation.
• Compare greenhouse gas dynamics between soil samples from distinct landscape positions ('Toeslope' vs. 'Plateau') at the Teller Road site.
• Calibrate process models of anaerobic decomposition using controlled temperature (8°C) incubation data from Arctic tundra soils.

Strengths

• Controlled laboratory incubations over a defined 55-day period at a constant 8°C.
• Includes paired experimental treatments: with and without ammonium chloride addition.
• Part of a decade-long (2012-2022) DOE NGEE Arctic research effort to improve Earth System Models.

Limitations

• Sample size is limited to soil from a single field site (Teller Road Site TL_MM27).
• Experimental conditions (anaerobic, 8°C) may not fully represent in-situ field variability.
• Specific row count, column details, and measurement frequency are unknown.

Provenance

Source

NGEE Arctic project, supported by the Department of Energy’s Office of Biological and Environmental Research.

Collection Method

Laboratory soil microcosm incubation experiments with repeated headspace gas measurements and destructive harvesting for porewater extraction.

Time Range

Soil collected in April 2017; incubation experiments and associated data likely from 2018-2019.

Geography

Soil sourced from the NGEE Arctic Teller Road Site at mile marker 27 on the Seward Peninsula, Alaska, USA.