CAGW alarmists can no longer deny the physics and the inconvenient climate empirical records...the feared trace gas CO2 is proving to be a toothless boogieman...tipping point global warming is off the agenda due to ever lower CO2 sensitivity.....

(click on graph to enlarge)

WUWT had a recent article regarding the continuous diminishing impact of CO2 on global temperatures.

The indisputable physics of climate science states that for every molecule of CO2 added to the atmosphere, that molecule will have a smaller impact than the one before it.

This diminishing return of CO2 is a well known logarithmic function, as described here.

This most recent article elaborates even further on the ever-sooner trivial CO2 influence, which the author summarizes in this manner:

===>"The committed Nations by their actions alone, whatever the costs they incurred to themselves, might only ever effect virtually undetectable reductions of World temperature. So it is clear that all the minor but extremely expensive attempts by the few convinced Western nations at the limitation of their own CO2 emissions will be inconsequential and futile."

A visualization of the diminishing CO2 impact is revealed by the adjacent top graph. Its plot is a simple ratio of total temperature change divided by atmospheric CO2 (ppm) change since January 1850.

As the graph clearly depicts, the ratio declines in the direction of zero as the growing total of added CO2 produces less and less global warming. Ergo, the climate's sensitivity to CO2 emission is shrinking, constantly.

The bottom graph is the same ratio but only for the shorter period, dating from January 1950 to June 2014. Obviously, the huge increase of atmospheric CO2 from the modern period's industrial/consumer engine has indeed produced a diminishing impact on global temperatures.

This is the empirical evidence that the IPCC and CAGW alarmists never want to talk about as it provides the proof that human CO2 emissions will not be causing massive climate calamities. Yes...those same scary catastrophes always being portrayed by the 97% "consensus" Hollywood science and the robustly gullible mainstream press.

Note: Using January 1850 as the base temperature anomaly and CO2 level month, the total change for both parameters was calculated for each subsequent month. Then for each subsequent month, the total temperature change from the base month was divided by the total CO2 ppm change - a ratio, maybe best described as the amount of temperature change produced by a molecule of CO2. The HadCRUT4 monthly global dataset was used for numerator calculations; denominator calculated from the combined CO2 datasets found here and here.