Lecture, Central London, Tuesday, 18 Apr 2023 - 18:00

The Trillionth Tonne of Carbon and Why It Matters For Climate Change

a bird's eye view of icebergs in the ocean

When we connect our model of the global carbon cycle to the model of atmosphere-ocean temperatures we find every tonne of CO2 we dump into the atmosphere ratchets up global temperatures, permanently, by around half a trillionth of a degree Celsius. So, to stop global warming, we need net zero carbon dioxide emissions. And to limit warming to 2°C, we need to limit the total amount we emit to around 3.7 trillion tonnes of CO2: one trillion tonnes of carbon. 

Professor Myles Allen

Professor Myles Allen

Frank Jackson Foundation Professor of the Environment

Professor Myles Allen took his first degree in Physics and Philosophy, followed by a doctorate in Atmospheric, Oceanic and Planetary Physics, both at the University...

Find out more

Support Gresham

Gresham College has offered an outstanding education to the public free of charge for over 400 years. Today, Gresham plays an important role in fostering a love of learning and a greater understanding of ourselves and the world around us. Your donation will help to widen our reach and to broaden our audience, allowing more people to benefit from a high-quality education from some of the brightest minds.