This disturbing video documents global warming from 1800 up through the present time
The most important indicator of global warming is seen in changes of the land and sea surface temperature record. This approach has been criticized in several ways, including the choice of stations and the methods for correcting systematic errors. But the Berkeley Earth Surface Temperature group is addressing the criticisms of former temperature analyses studies, and is preparing an open record that will allow rapid response to further criticism or suggestions.
In this study, the group is using over 39,000 unique stations, which is more than five times the 7,280 stations found in the Global Historical Climatology Network Monthly data set (GHCN-M) that has served as the focus of many climate studies.
The results, shown in this video (below the jump), is a representation of land surface temperature anomalies. This video was created from a data set made by combining 1.6 billion temperature reports from 15 preexisting data archives, from 1800 to the present. These results include the best estimate for global temperature change, as well as estimates of where uncertainties are in the record.
In this video, the map of the world shows the temperature anomaly by location over time. The chart at the bottom shows changes in global land-surface temperatures. The Berkeley Earth analysis shows that the land has warmed by 0.911 degrees Centigrade (+/- 0.042 C) on average since the 1950s.
For more information about this study, who conducted it, who funded it, and the methods used, or to access the data set and the code itself, visit Berkeley Earth. The Berkeley Earth findings were presented at the Third Santa Fe Conference on Global and Regional Climate Change in October 2011 (presentation: free PDF).
Source: The Guardian