Concluding comments
- To achieve alignment of the HadCRUT4 reality with the IPCC models the following temperature corrections need to be applied: 1990 +0.5; 2001 -0.6; 2007 +0.6; 2014 -0.3. I cannot think of any good reason to continuously change the temperature datum other than to create a barrier to auditing the model results.
- Comparing models with reality is severely hampered by the poor practice adopted by the IPCC in data presentation. Back in 1990 it was done the correct way. That is all models were initiated in 1850 and used the same CO2 emissions trajectories. The variations in model output are consequently controlled by physical parameters like climate sensitivity and with the 164 years that have past since 1850 it is straight forward to select the models that provide the best match with reality. In 1990, it was quite clear that it was the “Low Model” that was best almost certainly pointing to a low climate sensitivity.
- There is no good scientific reason for the IPCC not adopting today the correct approach adopted in 1990 other than to obscure the fact that the sensitivity of the climate to CO2 is likely much less than 1.5˚C based on my and others’ assertion that a component of the Twentieth Century warming is natural.
- Back in 1990, the IPCC view on climate sensitivity was a range from 1.5 to 4.5˚C. In 2014 the IPCC view on climate sensitivity is a range from 1.5 to 4.5˚C. 24 years have past and billions of dollars spent and absolutely nothing has been learned! The wool has been pulled over the eyes of policy makers, governments and the public to the extent of total brain washing. Trillions of dollars have been misallocated on energy infrastructure that will ultimately lead to widespread misery among millions.
- In the UK, if a commercial research organisation were found cooking research results in order to make money with no regard for public safety they would find the authorities knocking at their door."
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