Methane (CH4) and nitrous oxide (N2O) are potent green-house gases (GHGs) with microorganisms being in the central role both in their production and consumption. Sea ice regulates the GHG exchange between seawater and atmosphere during winter. However, little is known of the spatial and temporal patterns of sea ice N2O and CH4 dynamics and the predominant microbial processes behind them. Combining state-of-the-art sequencing techniques and biogeochemical measurements from the Arctic and the Baltic sea ice, the WICE project will widen the scant knowledge on the dynamics and significance of microbial processes related to CH4 and N2O cycling in sea ice and underlying waters. Ultimately, the project will provide data pertinent in evaluating the future consequences of diminishing sea-ice cover and its possible effects on GHG dynamics in the ice covered seas.

2023

2027