From left to right, each stripe in the design represents a year’s worth of temperature change since the early 20th century. The blue shades indicate cooler-than-average years, while the shades of red are hotter-than-average years.
The images show a significant shift from blue to red in recent years, signaling an alarming rise in temperatures around the world. The deep red stripes on the right side underscore how human activity has contributed to planet-heating emissions over time.
Ed Hawkins, a climate researcher at the University of Reading and the creator of the stripes, said the most striking change recently has been that “nearly every country has a dark red stripe at the end.”