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Old June 25th 18, 10:32 AM posted to uk.sci.weather
Alastair Alastair is offline
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Default [CC] 4th warmest May for global surface air temperatures

On Monday, 25 June 2018 09:23:45 UTC+1, Alan LeHun wrote:
In article ,
~0.4 in 1970 to ~1.0 in 2010. That is an increase of 0.15 per decade. To get to an increase of 1.5 K will take about 30 years


My maths must be off. I make it about 60 years.

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Alan LeHun

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Temperatures had already risen by 1 K in 2010, so it only needs an additional 0.5 to reach the IPCC's first target of less than 1.5 K. 30 years at 0.15 K per decade gives +0.45 K giving a total rise by 2040 of 1.45 K, near enough to 1.5 K.