Several distinct measurements have recently suggested that more energy is entering the Earth system than leaving it β more than our best climate change models predicted. βItβs quite worrying. We really need to figure out exactly why this happened,β Emanuel said. The answer could be clouds, or aerosols, or possibly an unknown ocean cycle that will dissipate in 10 years and put us back on the predicted track. But something significant is clearly missing from our picture of the system.