Seminar: Nathalie Triches

Nitrous oxide (N₂O) is the third most important anthropogenic greenhouse gas. While N₂O fluxes from managed agricultural soils are well studied, recent research has increasingly focused on natural Arctic soils. Most Arctic soils are nutrient-poor, and the mechanisms controlling their typically low N₂O fluxes remain poorly understood. This PhD thesis advances understanding of low N₂O fluxes in a nutrient-poor, highly heterogeneous Arctic peatland based on three years of repeated manual chamber measurements conducted throughout the snow-free season. Our results show that the nutrient-poor peatland functions as a continuous, non-negligible but small sink for N₂O during the snow-free season.