Atmospheric Temperatures have risen .8 degrees C since 1880
Global Land-Ocean Temperature Index - 1880-2011
The Earth’s average temperature has increased about .8°C (1.4 °F) since pre-industrial times
Global surface air temperature anomalies relative to 1951-1980 base period for annual and 5-year running means. Green vertical bars are 2s error estimates (Hansen et al. 2010).
Source: NASA