Each circle is identical except for the red line showing that year’s data. The silver area denotes the acceptable range of sea ice (+/- 2 standard deviations), and the blue line within the silver is the average. The calendar starts at the top and moves clockwise, with each radiating line indicating a month. Every concentric circle indicates one million square kilometers of sea containing at least 15% ice. The seasonal melt for each year peaks in September. The drawings were executed using digital embroidery, where each stitch of the average and yearly information corresponds to an actual data point.