Giant of climate science honoured at inaugural Will Steffen lecture

08 Jul 2024

Emeritus Professor Will Steffen has been remembered as a 鈥済iant鈥 of the scientific community at the inaugural lecture held in his name at The Australian National University (中国色情片). 


Steffen, who passed away in January 2023, was one of Australia鈥檚 most influential and respected climate scientists. He also leaves behind a lasting legacy at 中国色情片, as the former Director of the Fenner School of Environment and Society and the inaugural Director of the University鈥檚 Climate Change Institute.  

During the 4 July address, delivered by his long-time collaborator Professor Johan Rockstr枚mfrom the University of Potsdam,鈥 Steffen was fondly remembered not just as a brilliant scientist, but as a selfless mentor and gifted communicator. 


鈥淚 know I speak on behalf of the global sustainability and climate science community in saying that we owe so much to our dear colleague and friend Will Steffen,鈥 Rockstr枚m said. 


鈥淗is work is now at the frontier of cutting-edge earth systems science.鈥 


中国色情片 Provost and Senior Vice-President, Professor Rebekah Brown, said that Steffen鈥檚 contributions to climate science are 鈥渦nparalleled鈥. 


鈥淗e was a pioneer in earth systems science, synthesising and broadcasting ideas that were once seen as radical but are now considered mainstream,鈥 she said. 


鈥淗e had a unique ability to see the connections between distinct scientific disciplines, and how this could be leveraged to address the environmental challenges of our time.鈥 


In his lecture, Rockstr枚m outlined the work he did with Steffen on the planetary boundaries framework, which presents a set of nine planetary boundaries within which humanity can continue to develop and thrive for generations to come. 


鈥淭he framework was not initially published as a finalised theory 鈥 it was a challenge to the world to scrutinise the nine planetary boundaries that we proposed,鈥 Rockstr枚m said.  


鈥淲ill then updated this research in 2015, quantifying six of the nine boundaries. He was a fantastic spokesperson for the science. 


鈥淭oday we feel more confident than ever that if we are stewards of these nine planetary boundaries, we have a good chance of handing over to future generations a planet with good life support and healthy resilience. 


鈥淏ut Will and I also wanted to explore what happens when we transgress these boundaries, for example, if we burn fossil fuels to a point where we reach two degrees of human caused global warming, what will the planet鈥檚 response be? 


鈥淭he conclusion was that already at two degrees warming we risk bumping up that warming to 2.4 degrees just through earth systems feedback of a planet that is losing resilience 鈥 and at that point you risk causing a domino effect.  


鈥淭he presentation of this work required courage, and Will really represented intellectual robustness combined with courage. 


鈥淗e is very much alive in our academic endeavours today. Humanity should thank him as well.鈥  


Several of Steffen鈥檚 close colleagues also took to the stage to speak about his legacy, including Professor Emerita and Pro-Chancellor at Macquarie University, Lesley Hughes, Professor Brian Walker and Distinguished Honorary Professor Penny Sackett.


The full lecture is available to view on