What is the global mean temperature?

There is some excitement in Germany at the moment about what is the global mean temperature. After some years of reporting an annual mean of 15 degrees Celsius, the WMO and NOAA are reporting a current mean of 14.8 degrees. In other words, the global mean temperature has DROPPED. Read all about it here.

I am ready to be corrected but as far as I can see it is just a misunderstanding.  Here are the two relevant paragraphs from the WMO:

"NOAA said the combined average temperature over global land and ocean surfaces in May was 0.87°C (1.57°F) above the 20th century average of 14.8°C (58.6°F), beating the previous record set in 2015 by 0.02°C (0.04°F). May 2016 marks the 13th consecutive month a monthly global temperature record has been broken—the longest such streak since global temperature records began in 1880.

After five consecutive record months it comes to no surprise that the average global land and ocean surface temperature for January–May 2016 resulted in the warmest such period on record across the world's land and ocean surfaces, at 1.08°C (1.94°F) above the 20th century average of 13.1°C (55.5°F), surpassing the previous record set in 2015 by 0.24°C (0.43°F), according to NOAA"


So there you see the 14.8°C figure.  It is pretty clear however that the 14.8°C figure refers to May average only, not the average temperature for the whole year.

So:  A storm in a teacup?  I think so -- JR

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