Tuesday, June 24, 2014

New paper claims the 'pause' is 'not so unusual' & 'no more than natural variability'

He's baack!...

Shaun Lovejoy has published a new paper which cites his prior claim of 99.9% confidence that one of the two temperature graphs below is your fault, and the other due to natural variability. 


 TIME –>
[graphs from Not A Lot Of People Know That, not Lovejoy's paper]

FYI according to Lovejoy's dodgy statistics the top graph is man-made, the bottom graph is due to natural variability.

In Lovejoy's new paper, he acknowledges a 'pause' in global warming since 1998, says it's "not so unusual" and concludes "the pause is no more than natural variability." Indeed, the pause is due to natural variability that has not been accounted for by climate models, and thus invalidates attribution claims that the past 50 years of temperature variations are necessarily due to man-made CO2. Furthermore, prior work by NOAA and others has found 'pauses' of 15 or more years are indeed unusual and would suggest the climate models are overly sensitive to CO2. According to RSS satellite data, the 'pause' has lasted almost 18 years. 

S. Lovejoy

An approach complementary to General Circulation Models (GCM's), using the anthropogenic CO2 radiative forcing as a linear surrogate for all anthropogenic forcings [Lovejoy, 2014], was recently developed for quantifying human impacts. Using pre-industrial multiproxy series and scaling arguments, the probabilities of natural fluctuations at time lags up to 125 years were determined. The hypothesis that the industrial epoch warming was a giant natural fluctuation was rejected with 99.9% confidence. In this paper, this method is extended to the determination of event return times. Over the period 1880-2013, the largest 32 year event is expected to be 0.47 K, effectively explaining the postwar cooling (amplitude 0.42 - 0.47 K). Similarly, the “pause” since 1998 (0.28 - 0.37 K) has a return period of 20-50 years (not so unusual). It is nearly cancelled by the pre-pause warming event (1992-1998, return period 30-40 years); the pause is no more than natural variability.


  1. If you take $$$$$ out of the equation, all of the anomalies, and temperature variations would come back to 'normal'.

  2. Amazing how the "natural variability" gets factored in when it is to their advantage. In actuality their entire "warming" scenario would be covered and non-existent if natural variability were being applied.

    1. True, solar activity & ocean oscillations explain 95% of climate change over past 400 years