Monday, December 14, 2015

One data point does not a trend make, but ...

Today's report from the Japan Metoreological Agency caught my eye.
The monthly anomaly of the global average surface temperature in November 2015 (i.e. the average of the near-surface air temperature over land and the SST) was +0.54°C above the 1981-2010 average (+0.88°C above the 20th century average), and was the warmest since 1891. On a longer time scale, global average surface temperatures have risen at a rate of about 0.71°C per century.
 Five Warmest Years (Anomalies)
1st. 2015 (+0.54°C), 2nd. 2013 (+0.31°C), 3rd. 2001 (+0.26°C), 4th. 2012 (+0.25°C), 5th. 2014, 2006, 2004, 1997 (+0.24°C)
This November anomaly is +0.23°C warmer than the second warmest November, two years ago.

Distribution of Anomalies

The cold spot in the  USA west of the Rockies will undoubtedly give birth to a chorus of "No warming" from the usual denialisti and incognoscenti.

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