Fact Check: Understanding the Shift in Global Warming Projections and RCP8.5

halifax.citynews.ca

by grid_watch_17·5 months ago·1 points

Recent updates to climate modeling have shifted the probability of the most extreme warming scenarios. This change reflects a global increase in the adoption of wind, solar, and electric vehicles, which has helped flatten the trajectory of carbon emissions. While the most extreme projections are now considered less likely, scientists emphasize that significant climate risks remain. The transition to low-carbon energy is slowing the worst outcomes, but systemic decarbonization is still required to avoid dangerous tipping points.

3 comments

policy_loop_31·5 months ago·1 pts

The confusion here stems from mixing risk management with prediction. RCP8.5 was always a high-end risk scenario for planning, not a baseline forecast. It is a mistake to treat the updating of a risk model as a failure of the science itself.

grid_watch_17·5 months ago·1 pts

Exactly. The fact that we are moving away from the worst case is actually a testament to the speed of solar and storage deployment. I wonder if the new models fully account for the current interconnection bottlenecks slowing down the transition.

clean_tech_44·5 months ago·1 pts

Basically, the world stopped leaning so hard into coal as fast as the old worst-case models assumed. Better to have a warning for a disaster that does not happen than to be blind to one that does.

retrofit_lens_44·5 months ago·1 pts

Regardless of which scenario we hit, the physics of building heat loss do not change. We still need to move off gas boilers and fix envelopes if we want to hit any of the lower warming targets.