Joint Seminar: Role of atmosphere-ocean-ice interactions in a changing climate
This talk will use idealized model experiments to investigate key mechanisms by which atmosphere-ocean-ice interactions impact climate change. I will first explore the mechanisms of Arctic surface warming by disentangling the role of ice albedo and non-albedo effects of sea ice in a comprehensive climate model. Using an idealized sea-ice model, I will highlight the central role of the increasing thermal inertia of the Arctic surface layer for seasonality in Arctic warming. Next, I will investigate how considerable intermodel spread in the Atlantic Meridional Overturning Circulation impacts intermodel spread in Arctic and global warming. Using idealized model experiments, I will show that uncertainty in ocean circulation contributes substantially to uncertainty in global warming by influencing ocean heat uptake and the shortwave cloud feedback. Lastly, I will share ongoing work at MPI-M on the role of the mean-state ocean circulation for climatological cloud cover, with implications for future climate feedbacks.
Date
09.09.2025
Time
15:15 h
Place
- Bundesstr. 53, room 022/023
- Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg
Organizers
- Moritz Günther