Dome C migration in Antarctica during the last 800,000 years

The ice core extracted as part of the Beyond EPICA project is expected to provide the longest continuous climate record, reaching back at least 1.2 million years. However, the hypothesis that Dome C remained stable over several glacial interglacial cycles in order to establish a reliable age depth relationship remains unverified. Using the GRISLI2.0 ice sheet model, we perform an ensemble of 100 simulations to follow the evolution of Dome C position through time. Results show that the dome is moving over time, and that these migrations are strongly influenced by grounding line dynamics in the Aurora Subglacial Basin. These findings highlight the importance of using ice-flow models that explicitly account for horizontal advection when constructing accurate age depth relationships for deep ice cores.