I think this is one of the best visualization of global temperature rise. Each row is a decade; each disc is a year. You can see how month by month, year by year, things are getting hotter! This is why we must work together to get policies changed to ways that will address the #ClimateCrisis.
@Alex - all the color-coded graphs I've seen (and most weather reports) use blue (called a "cool" color) to represent colder than a set point, with the more intense the blue, the cooler from the set point, and red (called a "warm" color) to represent warmer than the set point, with the more intense the read the warmer from the set point.