In this episode, Sophie is joined by Professor Martin Siegert, Vice President and Deputy Vice-Chancellor at the University of Exeter Cornwall Campus. Martin is a leading expert in polar science, glaciology, and climate science. With over 30 years of experience, Professor Siegert shares his inspiring, albeit unconventional, journey into academia, demonstrating that a career in science is “for everybody,” no matter your background!  

The conversation dives into the critical issue of global sea level rise and the dramatic changes occurring in the polar regions, particularly Antarctica, one of the fastest warming places on Earth. Professor Siegert explains how melting polar ice sheets are now controlling global sea levels, potentially leading to significant rises measured in metres rather than centimetres. He highlights two key effects: the gravitational impact that raises sea levels in mid-latitudes like the UK, and the albedo effect, where melting ice causes polar regions to absorb heat instead of reflecting it, creating a planetary problem. 

Listeners will discover Professor Siegert's groundbreaking research using radio-echo sounding to map hidden subglacial environments and hundreds of lakes, which is essential for developing accurate ice sheet models to predict future sea level rise. With current CO2 levels far exceeding natural norms, he emphasises that significant sea level rise is inevitable. 

Professor Siegert outlines a feasible decarbonised pathway as the only viable solution, firmly rejecting impractical geoengineering strategies. He concludes with a powerful call to action for individuals, businesses, and institutions, leaving listeners inspired to engage in the fight against climate change. This insightful and optimistic conversation highlights the interconnectedness of human activities and the Earth's polar regions, underscoring the urgent need for collective action.