[Update from Tony Duncan : “Just got this from John Roden.
“The reporter did not quote me correctly. That happens. There were other errors in the article. I seem to get reporters that are not familiar with the nuances of science.““]
A Southern Oregon University professor believes students and the public need to hear the considerable case against global warming to help spur critical thinking.
Biologist John Roden will give a talk called “Global Climate Change: Why Are There Still Skeptics?” at 7:30 tonight, in the Meese Auditorium in the SOU Art Building, as part of the school’s Distinguished Lecture series showcasing campus professors. It’s free and open to the public.
Roden notes that concentrations of carbon dioxide, a greenhouse gas, today is 440 parts per million in the atmosphere, but in the Jurassic period was a vastly more dense 700,000 ppm, “yet the planet wasn’t more than 20 degrees warmer.” This is because the gas has a ceiling at which it doesn’t increase heat from trapped sunlight, he says.
http://www.mailtribune.com/
Wow! 78% N2 + 21% O2 + 1% Ar + 70% CO2. Apparently the atmosphere during the Jurassic had 170% total gases.