Center for Data Innovation: “Ed Hawkins, a climate scientist at the University of Reading, has created a visualization depicting changes in temperature anomalies from 1880 to 2021. For each year, a spiral is drawn representing the degree to which temperatures increased or decreased in each month relative to a base period of 1951 to 1980. For instance, temperatures in February and March of 2021 were over 1 degree more than the base period for those months so the spiral in the visualization has been drawn outside the outermost ring that represents a more than 1 degree increase.”