About 6 months ago I provided an update on the state of global temperature anomalies as well as the CO2 concentration in the atmosphere and I think it’s time to do another one. You’ll see that the Anthropogenic Global Warming (AGW) hypothesis, which states global temperatures will rise with increasing atmospheric CO2 concentration, falls apart by a simple graphing of the data.
As a reminder, here is how I obtain the data:
“I look at two  well respected data sets to obtain the global temperature anomalies: The University of Alabama Huntsville (UAH) and the Climate Research Unit (CRU). The atmospheric CO2 data is obtained from NOAA website but uses the data from Mauna Loa which has been measuring CO2 concentrations (ppm) in the atmosphere since 1958.”
The graph for atmospheric CO2 concentration, measured in parts per million (ppm), is shown below.
Here are the graphs of global temperature anomalies for CRU and UAH.
Now let’s graph those same two data sets but just include temperatures since 1998.
Looks pretty flat to me over the past 13+ years and this isn’t due to a reduction in atmospheric CO2 concentration which continues its steady march upwards.
At the risk of belaboring the point – If the AGW hypothesis is correct then we should be able to see a positive linear trend (correlation) when we graph atmospheric CO2 concentration on the x-axis and global temperature anomaly on the y-axis. The graph using the CRU data is shown below.
Something breaks down when atmospheric CO2 concentration hits around the 370 ppm point and we see that increased atmospheric CO2 concentration didn’t increase global temperatures.
So there is not much change in the graphs since the last time I posted them and in actuality, the temperature anomalies are on a downward trend for the last few years.
Couple this inconvenient data with the recent hacking activity of climate scientist Peter Gleick and the recent desperate and out-of-touch-with-reality headline; you can see that it is tough being an AGW cult leader trying to peddle your propaganda to the public.