Tipping points refer to critical thresholds in the Earth system that, once crossed, can lead to rapid and potentially irreversible changes in environmental conditions in systems such as the Atlantic Meridional Overturning Circulation, the Greenland and Antarctic ice sheets, tropical and boreal forests, permafrost, and monsoon systems. They remain a major source of uncertainty in climate projections, particularly at the regional level, with potentially profound impacts on the climate, ecological, and societal systems, and are therefore highly relevant to the national and international climate assessment reports and climate adaptation plans, including the IPCC's Seventh Assessment Report (AR7).

This session invites contributions that advance our understanding of tipping dynamics through climate and Earth system modelling approaches. We particularly welcome multi-model analyses building on a number of recent multimodel experiment protocols, including TIPMIP-ESM (Jones et al. 2026), TIPMIP-Ocean (Swingedouw et al. 2026), TIPMIP-Ice as well as the CMIP7 AFT and other MIPs, investigating climate responses and tipping behaviours across the atmosphere, ocean, cryosphere, and biosphere. We also encourage cross-component syntheses that compare the mechanisms, thresholds, timescales, and reversibility of different tipping elements. The session also invites studies using other modelling frameworks and approaches — including single-model analyses — with a focus on tipping dynamics in any Earth system component. We aim to bring together the climate modelling community working across this broad theme, to foster comparisons across models and methodologies (thus distinguishing robust from model-dependent findings), and ultimately to inform the assessment of tipping risks for AR7.