Variation in greenhouse gas production within a thermokarst lagoon system, outer Mackenzie Delta, Canada ...

• Main Author: Jenrich, Maren
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2025
• Subjects: CH4; CO2; incubation experiment; seawater impact; talik; Event label; Sample code/label; Identification; Sediment type; Treatment; Treatment: salinity; Depth, sediment/rock, top/minimum; Depth, sediment/rock, bottom/maximum; DEPTH, sediment/rock; DATE/TIME; Incubation duration; Methane, production, anaerobic, cumulative, per soil dry mass; Methane, production, anaerobic, cumulative, per unit mass soil organic carbon; Methane, production rate, per soil dry mass; Methane, production rate, per mass soil organic carbon; Carbon dioxide, production, anaerobic, cumulative, per soil dry mass; Carbon dioxide, production, anaerobic, cumulative, per unit mass soil organic carbon; Carbon dioxide, production rate, per soil dry mass; Carbon dioxide, production rate, per mass soil organic carbon; Gravity corer, UWITEC; Sampling by hand; Gas chromatography on an Agilent Technologies 7890A GC; CA-Land_2021_ReindeerIsland; AWI Arctic Land Expedition; Arctic; Canada; Mackenzie Delta; Talik; Reindeer Island; permafrost; Thermokarst
• Online Access: https://dx.doi.org/10.1594/pangaea.974430; https://doi.pangaea.de/10.1594/PANGAEA.974430

When highly degraded, lowland thermokarst landscapes are flooded by the sea, and thermokarst lagoons, lakes, and the sea become connected with each other, complex lagoon systems are formed. Consequently, a natural gradient of marine submergence age and connectivity emerges within the system with older, well-connected lagoons closer to the sea, and younger, less connected lagoons further inland. The dataset presents the cumulative greenhouse gas production and daily production rates from 7 lagoons of variing sea connectivity and permafrost and active layer as endmembers. In detail sediment of active layer (AL) and permafrost (PF) from a soil pit located on the lowland of Reindeer Island (RI21-P2-AL, RI21-P2-PF), a thermokarst lake (RI21-05 (TKL05)), a limited open lagoon (LAG13), two semi-open lagoons (LAG04; LAG14), two mostly open lagoons (LAG03; LAG16) and two open lagoons (LAG07; LAG12). We incubated the samples anaerobically at 4 °C under fresh (c=0 g/L), brackish (c=13g/L) and marine (36g/L) conditions ...