Climate change projected by the IPCC 2013 report under the business as usual scenario (RCP8.5) projects climate change in the next 100 years to be as big as the Paleocene/Eocene Thermal Maximum extinction event 56 million years ago. Changes today however are happening 100 times faster than the PETM. The PETM was likely a methane…
When will we completely leave our old climate? When will our new climate be 100 percent different than our old? When will the normal temperature in the our new climate be warmer than anything in our old climate? It’s called Climate Departure and it is coming soon to a planet near you. On the path…
Five degrees of change—a half zone. Not average temperature; this is based on the average last freeze. I gave a presentation to the Austin Organic Garden Society last month and I remembered USDA had recently come out with new hardiness zone maps. The USDA changes in 2012 are not so much different than the 2006…
How do we curb emissions with the way our society has evolved? Really. I mean serious curbing; enough to prevent dangerous climate change? When considering the answer, dangerous climate change must be clearly defined. So, what exactly is dangerous climate change? Read More — First published on the Rag Blog
(170 pages) Ecological thresholds occur when external factors, positive feedbacks, or nonlinear instabilities in a system cause changes to propagate in a domino-like fashion that is potentially irreversible. Atmospheric carbon dioxide has reached levels unprecedented in possibly the last 24 million years. CO2 concentrations have risen by 34%, mostly in the last several decades. Global…
