Global Temperature Anomalies averaged from 2000 to 2004

NASA has made a this striking animation that shows a 130-year history of how global temperatures have become warmer in most parts of the world. The polar regions are warming fastest and quickest as is clearly shown. Here’s the temperature scale and more detailed explanation from NASA follows. — Stephen

Global Temperature Anomalies averaged from 1920 to 1924.

Source: NASA/Goddard Space Flight Center Scientific Visualization Studio

Five-Year Average Global Temperature Anomalies from 1880 to 2010

This analysis concerns only temperature anomalies, not absolute temperature. Temperature anomalies are computed relative to the base period 1951-1980. The reason to work with anomalies, rather than absolute temperature is that absolute temperature varies markedly in short distances, while monthly or annual temperature anomalies are representative of a much larger region. Indeed, we have shown (Hansen and Lebedeff, 1987) that temperature anomalies are strongly correlated out to distances of the order of 1000 km

This color-coded map displays a progression of changing global surface temperatures anomalies from 1880 through 2010. The final frame represents global temperature anomalies averaged from 2006 to 2010.