“After 2015, global temperature rose significantly faster than in any previous 10-year period since 1945.”
Rahmstorf and Foster stripped out the noise from El Nino, volcanic activity, and solar cycles. What is left is a warming trend that has accelerated past anything in the last 80 years. Previous analyses could not hit the 95% confidence threshold because natural variability muddied the signal. Once you remove those confounders, the acceleration is clear and undeniable. The planet is warming faster than it was ten years ago. Not at the same rate. Faster. Every year of inaction makes the next decade worse.