Multi-scale model analysis of Arctic surface-atmosphere exchange of climate-active trace gases

Summary

The Arctic near-surface atmosphere is warming at nearly four times the rate of the global average. The opening of the Arctic ocean through disappearing sea ice is projected to result in substantial changes in ocean-sea ice-atmosphere exchange of momentum, heat and moisture, as well as climate-active trace gases such as carbon dioxide, methane and ozone. At the same time, the expected increase in local emissions of trace gases and air pollutants, by developing industry and shipping, poses an additional burden on the Arctic environment. The Arctic atmosphere, often considered pristine, faces significant changes in the coming decades.

This thesis introduces a comprehensive approach, using novel observations and state-of-the-art models, to advance understanding of local and large-scale processes controlling trace gases in the Arctic atmosphere. This thesis specifically focuses on, further development, evaluation and application of process-based model representations of surface exchange processes of climate-active trace gases.