The slowdown or shutdown of the Atlantic Meridional Overturning Circulation (AMOC) is widely considered a potential tipping point in Earth’s climate system, with potentially catastrophic consequences.

This interdisciplinary session examines questions spanning climate physics, climate impacts, and response options:

• How likely is an AMOC slowdown or shutdown under different climate pathways, and how well can we predict its timing and magnitude?
• What physical climate changes would result, and how would these affect humans and natural ecosystems?
• What strategies, including adaptation, mitigation, and climate intervention, might reduce risk or ameliorate consequences?

We emphasize priorities for action today:

• How can we improve monitoring and prediction of AMOC slowdown?
• How can we improve predictions of its impacts?
• How can we better understand societal and ecological consequences, and possible adaptive responses?
• What research could provide more confidence regarding whether proposed interventions, such as ice-sheet stabilization or solar geoengineering, could reduce AMOC-related risks?

• A - Atmospheric Sciences
• B - Biogeosciences
• C - Cryosphere
• OS - Ocean Sciences