With its global impact, sea level change is a big concern and challenge in climate study. Sea level has experienced large fluctuations in the past. It is not only a response to climate forcing but also an important factor influencing regional and global climate through feedbacks such as atmosphere and ocean circulation shifts, albedo changes, and land–ocean configuration changes. This session invites studies exploring past sea-level variations and their climatic consequences across different climate states and different timescales—from orbital to abrupt events. We welcome multidisciplinary contributions based on geological archives, proxy data, and Earth system modeling that quantify sea-level change and assess its interactions with ice sheets, sea ice, vegetation, monsoons, and ocean–atmosphere circulations. Studies addressing both regional expressions and global implications of sea-level dynamics and impacts are particularly encouraged.