Dr Liz Thomas is a paleoclimatologist, and head of the ice core research group at the British Antarctic Survey. Her team of researchers and PhD students produce high-resolution chemical, isotope, and gas records from ice cores to reconstruct past surface temperature, snow accumulation, sea ice variability, and atmospheric circulation over centennial to millennial time scales. She specializes in abrupt climate change, with a particular focus on the climate of the last 2000 years, including producing the first comprehensive record of Antarctic surface mass balance and quantifying the twentieth century contribution to global sea levels. Thomas leads the CLIVASH2k working group (Climate Variability in Antarctica and the Southern Hemisphere in the past 2000 years), co-leads INSTANT theme 1 (Instabilities and thresholds in Antarctica), and is expert member for the International Partnerships in Ice core Science. She has led several expeditions to Antarctica, the Arctic (Greenland and Svalbard), and most recently an expedition to drill the first ever ice cores from the sub-Antarctic islands.