Originally posted on Watts Up With That?:
By Christopher Monckton of Brenchley
I have now had the opportunity to study SteveF’s remarkable essay at Lucia’s Blackboard, to which Anthony kindly draws attention in his footnote to my earlier posting on the absence of statistically-significant global warming for 17 years 4 months.
SteveF’s conclusion is that once allowance has been made for three naturally-occurring influences – volcanic aerosols, the ~11-year solar cycle and the el Niño/la Niña cycles – the HadCRUt4 warming rate from 1979-1996 was six times faster than from 1997-2012. In the abstract, to allow for uncertainties, he cautiously reduces this to three times faster.
Even if one were to take the unadjusted HadCRUt4 data, the rate of warming from 1979-1996 was more than twice as fast as the rate from 1997-2012.
I decided to look not only at HadCRUt4, as SteveF did, but also at the two satellite datasets, RSS and UAH. RSS…
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