OxTalks will soon move to the new Halo platform and will become 'Oxford Events.' There will be a need for an OxTalks freeze. This was previously planned for Friday 14th November – a new date will be shared as soon as it is available (full details will be available on the Staff Gateway).
In the meantime, the OxTalks site will remain active and events will continue to be published.
If staff have any questions about the Oxford Events launch, please contact halo@digital.ox.ac.uk
Earth likely acquired a significant fraction of its volatile elements during the main stages of accretion. The atmospheres of the planetary embryos that accreted to form Earth must therefore have survived the giant impacts (collisions between planet-sized bodies) that dominate the end of accretion. Using numerical simulations of giant impacts, I will show that the efficiency of atmospheric loss depends strongly on the surface conditions on the colliding bodies (e.g., atmospheric pressure, presence/absence of an ocean). Understanding the complex feedbacks between the evolution and survival of planetary atmospheres provides new insights into the origin of our atmosphere and ocean.
