JMA monitors the long-term change of the global average surface temperature anomalies for the purpose of monitoring the global warming. In this page, the long-term changes of annual and monthly anomalies of the global average surface temperature are shown.
[Data and Analysis Method]
The annual anomaly of the global average surface temperature in 2012 (i.e. the average of the near-surface air temperature over land and the SST) was +0.14°C above the 1981-2010 average (+0.51°C above the 20th century average), and was the 8th warmest since 1891. On a longer time scale, global average surface temperatures have risen at a rate of about 0.68°C per century.
1st. 1998(+0.22°C), 2nd. 2010(+0.19°C), 3rd. 2005(+0.17°C), 4th. 2009,2002(+0.16°C)