This session brings together researchers examining key Quaternary climate processes across all sectors of the Southern Ocean and Antarctic ice sheet system, with emphasis on their interactions and global climate impacts. We seek contributions addressing specific challenges such as Antarctic Bottom Water export variability, Antarctic Circumpolar Current strength and migration, and the role of ocean stratification in CO₂ release. We welcome proxy and modeling studies on surface ocean changes, deep water circulation, sea ice dynamics, oceanic fronts, nutrient utilization, lithogenic input, and ice sheet retreat or meltwater discharge. We encourage studies covering a range of temporal scales to capture both long-term trends and abrupt changes in Southern Ocean and ice sheet behavior. Submissions exploring links to abrupt climate shifts and interhemispheric feedbacks are encouraged.