The black line shows the global annual average near-surface temperature anomalies from 1850 to 2013 from the HadCRUT4 dataset (data here in this format). The grey area shows the 95% confidence range on the annual averages. The orange line shows global annual average temperature anomalies from the GISTEMP data set produced by the Goddard Institute of Space Studies at NASA (GISTEMP data external link). The blue line shows global annual average temperature anomalies from the National Climatic Data Center's MLOST data set (data external link). Anomalies are defined relative to the 1961-1990 average.
