NASA animation shows 135 years of global warming in 30 seconds
It starts slowly, with a few spots of yellow scattered about the mostly blue world map in 1880.
By the time the NASA animation of global warming gets to 2013 (the latest year included), a good chunk of the two-dimensional surface is heated up to orange-red.
In the animation done by the NASA Goddard Space Flight Center Scientific Visualization Studio, red indicates temperatures that are higher than normal, while lower-than-normal temperatures are shown in blue.
The temperature analysis was done by the Goddard Institute for Space Science, compiling weather data from more than 1,000 meteorological stations around the world, satellite observations of sea-surface temperature and Antarctic research station measurements, according to an article by the Goddard Space Flight Center.
The average temperature in 2013 was 14.6 °C (58.3 °F), which is 0.6 °C (1.1 °F) warmer than the mid-20th century baseline, the article stated.