Abrupt climate change around 22 ka on the Siple Coast of Antarctica

A new ice core from Siple Dome, Antarctica suggests the surface temperature increased by ∼6°C in just several decades at approximately 22 ka BP. This abrupt change did not occur 500 km away in the Byrd ice core, or in climate proxy records in the Siple Dome core indicative of the mid-latitude Pacific. This demonstrates there was significant spatial heterogeneity in the response of the Antarctic climate during the last deglaciation and draws attention to unexplained mechanisms of abrupt climate change in Antarctica.