Hydrogen plays significant roles in the physical, petrological, geochemical, and geodynamic processes that shape planets even at low concentrations. Despite its importance, the degree and mechanisms of the storage and/or cycling of hydrogen between planetary surfaces and their interiors and quantitative values on the fluxes remains an area of open inquiry. This session aims to bring together researchers from the fields of seismology, geodynamics, petrology, geochemistry, and mineral physics, who actively investigate the role of hydrogen in Earth’s interior. Relevant topics include, but are not limited to: investigations into the origin, cycling of hydrogen; seismic and geodynamic studies of their influence on planetary interiors; aqueous chemistry and reaction with minerals and rocks; and experimental and theoretical constraints on the structure, stability and physical properties of hydrogen-bearing phases at extreme conditions.

• DI - Study of Earth's Deep Interior