Climate change is a challenging issue on multiple levels - it's challenging for scientists to understand all of the complexities of a changing climate, it's difficult to know how to optimally communicate to the public about climate change, and of course we face an enormous challenge in figuring out
Blame the author for not putting a caption.
Here’s the paper: https://www.pnas.org/doi/full/10.1073/pnas.2411258121
Gray areas are not missing data, they’re areas where weather was becoming less extreme rather than more.