Peace-Athabasca Delta, Alberta, Canada

This colour composite time-series image is made up of three images aquired on May 4 (red), May 10 (green), and May 17 (blue), 1996. The Peace-Athabasca Delta is one of the world's largest inland freshwater deltas, covering some 3,900 square kilometres. The overlap of colours indicates the different stages of lake-ice breakup on the three different dates. By May 17, the ice cover has completely disappeared on the mid-sized lakes on the right side of the image but still covers a large area of Lake Claire on the left side of the image. (Credit: Canadian Space Agency)