Billions of years were required to shape the environment into one able to sustain life, yet the delicate geo/biological balance that maintains Earth in a habitable state remains poorly understood. A key aspect of Earth’s habitability is the role that the solid Earth plays in serving as not only a sink for gases such as CO₂ and O₂, but also its role in releasing volatile elements (e.g., H, C, N, O, S) and metals (e.g., Zn, Pb, Cd) that are key to the development of atmospheric chemistry over geological timescales and, eventually, the evolution life. This session examines how processes taking place in, or originating from, the Earth's interior contribute to partition elements between the atmosphere, crust and mantle. Contributions emphasizing the role of geodynamics and magmatic processes in establishing the chemical budget of the atmosphere, oceans and continents are also welcome. Submissions by early career scientists are encouraged.

• GS: Geochemical Society -
• GAC: Geological Association of Canada -
• GSA: Geological Society of America -
• WCRP: World Climate Research Programme -