Antoine Venaille

In recent decades, concepts from topology have revolutionalised our comprehension of wave physics. It offers new insights into the robustness of unidirectional trapped waves at boundaries that separate materials with distinct topological properties. Initially developed within the realm of condensed matter physics, these ideas have since permeated all branches of physics, including geophysical fluid dynamics. Using equatorial waves and tides as an illustrative example,  we will explain how topological bulk properties can be related to trapped modes along interfaces, and present a ray-tracing interpretation of this bulk-interface correspondence.