Here is the page it came from
linky dinky
Quote:
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Image/animation right: The animation to the right shows a basic demonstration of the increase in annual mean temperature in five year increments from 1880 through 2006. Warmest temperatures are in red. Click image to view animation. + Click for hi-res still image Credit: NASA/GISS
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There is no static baseline. Each step in the animation is based 5 years prior.