David Etheridge

3

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  • Principal Research Scientist, CSIRO
The Cape Grim observatory, home of the ‘world’s cleanest air’… and rising greenhouse gases. CSIRO

Why there’s more greenhouse gas in the atmosphere than you may have realised

Zoe Loh, CSIRO; Blagoj Mitrevski, CSIRO; David Etheridge, CSIRO; Nada Derek, CSIRO; Paul Fraser, CSIRO; Paul Krummel, CSIRO; Paul Steele, CSIRO; Ray Langenfelds, CSIRO, and Sam Cleland, Australian Bureau of Meteorology

Carbon dioxide levels in the atmosphere are at 414 parts per million. But thanks to a recalculation of methane’s warming power, the total amount of greenhouse gases is now equivalent to more than 500.
A wide range of industrial processes have released greenhouse gases into the atmosphere. Paulo Resende/Shutterstock.com

Global stocktake shows the 43 greenhouse gases driving global warming

Pep Canadell, CSIRO; Cathy Trudinger, CSIRO; David Etheridge, CSIRO; Malte Meinshausen, The University of Melbourne; Paul Fraser, CSIRO, and Paul Krummel, CSIRO

While the gases most responsible for global warming - carbon dioxide, methane and nitrous oxide - continue to climb, other industrial greenhouse gases are being brought gradually under control.
Forests and other land-based carbon stores held onto more carbon during colder historical climates. Miguel.v/Wikimedia Commons

Land carbon storage swelled in the Little Ice Age, which bodes ill for the future

Peter Rayner, The University of Melbourne; Cathy Trudinger, CSIRO; David Etheridge, CSIRO, and Mauro Rubino, Second University of Naples

When temperatures dipped between 1500 and 1750, the world’s landscapes responded by storing more carbon. Now, with temperatures climbing, it’s possible they will do the opposite and release even more.

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