Aug 21, 2019 The Dog Days of Summer
The Dog Days of Summer are so-called because Sirius, the dog star, appears in the night sky from around July through September. Sirius’ appearance in the night sky has long been associated with hot, dry weather (which is becoming hotter and drier as the earth warms). The graphic, developed by Ed Hawkins of Reading University in the UK, shows how average global temperatures have increased since 1901. It is a three-degree Celsius change over the range of colors. Each line in the graphic represents one country with each pixel in each line being one year.