Read here and here. The latest research is pointing to another causation of modern climate change: the ozone hole. It appears that the ozone hole affects climate from the southern polar to equator regions, with a special impact on circulation patterns and precipitation levels.
The researchers, Kang et al., make a point that the clueless IPCC did not even mention the ozone hole as a potential climate change force in the 2007 policymaker summary. And recently, it was discovered that an ozone hole is developing in the Arctic polar region.
"“This could be a real game-changer,”...researchers at Columbia University’s School of Engineering and Applied Science report their findings that the ozone hole, which is located over the South Pole, has affected the entire circulation of the Southern Hemisphere all the way to the equator...“We show in this study that it has large and far-reaching impacts. The ozone hole is a big player in the climate system!”...This means, according to Polvani and Kang, that international agreements about mitigating climate change cannot be confined to dealing with carbon alone— ozone needs to be considered, too...“While the ozone hole has been considered as a solved problem, we’re now finding it has caused a great deal of the climate change that’s been observed.” So, even though CFCs are no longer being added to the atmosphere, and the ozone layer will recover in the coming decades, the closing of the ozone hole will have a considerable impact on climate." [Sarah Kang, Lorenzo M. Polvani, J. C. Fyfe, M. Sigmond 2011: Science]
From another climate scientist:
“This study does illustrate the important point that different mechanisms of global change are contributing to the climate impacts we’re seeing around the world,” observed Professor Myles Allen of Oxford University, a leading UK climate modeller...“It’s very important to unpack them all rather than assuming that any impact we see is down simply to greenhouse gas-mediated warming.”
Additional non-CO2 climate change postings and peer-reviewed postings.