Will Steffen on Muck Rack

Will Steffen

As seen in: Nature, The Guardian, Journal of Banking Regulation, Memory Studies, Medical News Today, PNAS, Scientific American, Stuff.co.nz, Sydney Morning Herald, The Conversation and
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Articles

Earth beyond six of nine planetary boundaries

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By Katherine Richardson, Will Steffen, Wolfgang Lucht
| Science Magazine
Abstract This planetary boundaries framework update finds that six of the nine boundaries are transgressed, suggesting that Earth is now well outside of the safe operating space for humanity. Ocean acidification is close to being breached, while aerosol loading regionally exceeds the boundary. Stratospheric ozone levels have slightly recovered. The transgression level has increased for all boundaries earlier identified as overstepped.
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A Tribute to Paul Crutzen (1933-2021): The Pioneering Atmospheric Chemist Who Provided New Insight into the Concept of Climate Change

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By Jack Fishman, John Birks, Thomas Graedel, Will Steffen
| Bulletin of the American Meteorological Society (BAMS)
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A planetary boundary for green water - Nature Reviews Earth & Environment

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By Lan Wang-Erlandsson, Arne Tobian, Ingo Fetzer, Sofie te Wierik, Miina Porkka, Arie Staal, Fernando Jaramillo, Heindriken Dahlmann, Chandrakant Singh, Peter Greve, Dieter Gerten, Sarah E. Cornell, Will Steffen, Xuemei Bennink Bai
| Nature
Abstract Green water — terrestrial precipitation, evaporation and soil moisture — is fundamental to Earth system dynamics and is now extensively perturbed by human pressures at continental to planetary scales. However, green water lacks explicit consideration in the existing planetary boundaries framework that demarcates a global safe operating space for humanity. In this Perspective, we propose a green water planetary boundary and estimate its current status.
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