Jones says, “It’s Dead, Jim”
Posted by greg2213 on February 15, 2010
One of the Chief Scientists behind Global Warming says that any modern warming is similar to, and not statistically significantly different from prior warming.
Do you agree that according to the global temperature record used by the IPCC, the rates of global warming from 1860-1880, 1910-1940 and 1975-1998 were identical?
An initial point to make is that in the responses to these questions I’ve assumed that when you talk about the global temperature record, you mean the record that combines the estimates from land regions with those from the marine regions of the world. CRU produces the land component, with the Met Office Hadley Centre producing the marine component.
Temperature data for the period 1860-1880 are more uncertain, because of sparser coverage, than for later periods in the 20th Century. The 1860-1880 period is also only 21 years in length. As for the two periods 1910-40 and 1975-1998 the warming rates are not statistically significantly different (see numbers below).
I have also included the trend over the period 1975 to 2009, which has a very similar trend to the period 1975-1998.
So, in answer to the question, the warming rates for all 4 periods are similar and not statistically significantly different from each other.
This was from a BBC interview with Dr, Jones., via WattsUpWuthThat
Caveats: so why is Dr. Jones saying this? New data? New review of data? Tired of fighting? Tired of pressure to conform? CYA in case AGW falls apart?