This symposium is in direct continuation of the symposia held in 2011and 2016 with the same theme. It is felt that considerable advances have been in the last five years to warrant a revisit to it. The mass balance of the Antarctic and Greenland ice sheets and the circulation of the adjacent oceans are strongly coupled through physical processes occurring at the ice-ocean interfaces (i.e., the fronts and bases of ice shelves and glacier tongues, and the termini of tidewater glaciers). Improved understanding of these processes is essential so that they can be realistically represented in models of how ice sheets and glaciers would evolve in a changing climate, and to improve predictions of global sea level change. The goals of this symposium are: (1) to assess the status of our knowledge of ice–ocean interactions; and (2) to discuss what is needed for development of reliable, quantitative models of ice sheet evolution and associated changes in ocean circulation. We hope this symposium will attract experts in ice shelf, ice sheet, glacier, ocean and climate studies whose research addresses interactions of the ocean and ice in the global climate system using in situ observations, remote sensing and/or modeling. Come and attend what will be a stimulating and productive symposium in a beautiful setting in Southern California.