Munshi on the warpath again

I am a great admirer of the work of Jamal Munshi.  He really hits Warmists where it would hurt if they were real scientists.  As it is, of course, neither evidence nor logic is really of interest to them.

In the paper below, he hits at the most basic assertion of Warmism: That fossil fuel emissions influence the amount of CO2 in the atmosphere.

I have read the full paper and have no quarrel with its theory or methodology.  I am however a little uneasy at the criterion used for statistical significance.  He uses the more severe standard emanating from all the recent work on unreproducible results.  And none of the effects he observed survive application of that criterion.  By the traditional .05 criterion, however, we do see a weak but significant effect.  So the findings could in fact be sen as consistent with industrial CO2 emissions having an effect -- but a very slight one.  But there is certainly nothing like the dominant effect that Warmists assume

Changes in the 13C/12C Ratio of Atmospheric CO2 1977-2014


Data for the 13C fraction in atmospheric CO2 from six different measurement stations in the sample period 1977-2014 are studied to estimate its dilution by fossil fuel emissions. No correlation between the annual rate of fossil fuel emissions and annual change in the 13C fraction of atmospheric CO2 is found. We conclude that the 13C data for atmospheric CO2 do not serve as empirical evidence that changes in atmospheric CO2 since the Industrial Revolution can be attributed to fossil fuel emissions.


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