NASA has produced an animated map that illustrates changes in global temperatures between meteorological years 1891 and 2006. This animated map is an .mp4 file that can be viewed using a QuickTime player. Each frame in the animation represents a one year increment of the ten year mean temperature anomaly. This animation begins with a historic ten year (1891-1900) mean meteorological year temperature anomaly map and ends with a recent (1997-2006) ten year mean meteorological year temperature anomaly map. The animation clearly illustrates a global warming trend over the time interval.
First Frame of the Global Warming Map Animation by NASA