Archive by category | Jeff Tollefson

Montreal delegates hold off on HFC amendment

Jeff Tollefson; cross-posted from The Great Beyond <img alt=“roadtocopenhagen.jpg” src=“http://blogs.nature.com/climatefeedback/roadtocopenhagen.jpg” width=“150” height=“220” align=“right” hspace=“10px”//>International delegates to the Montreal Protocol wrapped up their meeting in Port Ghalib, Egypt, over the weekend without taking formal action to curb hydrofluorocarbons, modern refrigerants that are also poised to become a major contributor to global warming. Some 41 countries joined in a declaration in support of regulating HFCs as greenhouse gases under the Kyoto Protocol, according to the Institute for Governance and Sustainable Development and the Environmental Investigation Agency. This is in addition to support in North America and Europe as well as Micronesia and  … Read more

A simple climate model to the rescue

Robert Corell, chairman of the Washington-based Climate Action Initiative, recently illustrated the appeal of a remarkably simple modelling tool by giving reporters a direct answer to a difficult question: What is the impact of the international climate commitments announced thus far? Citing results from C-ROADS (for Climate Rapid Overview and Decision-support Simulator), Corell suggested that we are headed toward warming of 4 degrees Celsius by 2100.  Read more