I am a late-career ice/ocean scientist in the Shelf Seas group at BAS, and an honorary professor at the University of Bristol. My research focusses on the physics of polar oceans, sea ice (frozen seawater), and ice sheets (glacial ice). This research is broadly motivated by understanding changes in global ocean circulation and sea-level rise. I primarily study Antarctica and the Southern Ocean. The Antarctic Ice Sheet is currently losing ice, causing sea-level rise, and this has been caused by changes in ocean melting. My current research focus is to understand why this ice loss is occurring, and how it may change in future.