Eban Goodstein, Guest Blogger
Another in a series from the Triple Crisis Blog and the Real Climate Economics Blog on the Cancún Climate Summit.
The elections earlier this month saw the breaching of the 2016 deadline set by NASA’s Jim Hansen for global CO2 stabilization, and also moved us well beyond IPCC Chair Rajendra Pauchuari’s statement that action beyond 2012 “will be too late”. So where does this leave us? For what are we now, officially, too late?
Until this year, one could envision, just barely, a “politics as usual” scenario that set us on track to stabilizing C02 concentrations at 450 ppm. The 450 goal would, according to the IPCC’s best guess, have held global temperatures to 2.1 degrees C above pre-industrial levels—a further 1.5 degrees C warming this century. Getting there would have required US policy that initiated cuts in 2012, and delivered 80% reductions by 2050. These would have had to have been coupled with Chinese and Indian commitments to stabilize emissions by 2025, and then start down their own aggressive emission reduction pathways.