Like Mann’s hockey stick, some climate fairy tales keep insisting they are real. The CO2-fingerprint tale is another example.
Dr. Sebastian Lüning and Prof. Fritz Vahrenholt comment here on a new paper that completely discredits the atmospheric CO2-fingerprint theory, long ballyhooed by Mojib Latif and Bart Verheggen, for example.
Bad news for Mojib Latif: New study in the Journal of Geophysical Research questions stratospheric CO2 fingerprint
By Sebastian Lüning and Fritz Vahrenholt
(Translated/edited by P Gosselin)
Mojib Latif is a well-known friend of the climate catastrophe. He travels across the country, from one media appearance to another, hawking his climate theories, and especially his new book. One of his main assertions is the so-called CO2 “fingerprint” that we supposedly find in the atmosphere. According to Latif, the CO2-fingerprint confirms the enormous power of CO2 as a greenhouse gas. Tens of thousands of meters over our heads, the middle atmosphere has cooled and that can only be explained by CO2 trapping the heat below in the troposphere.
However, in the meantime, atmospheric science has progressed and it now shows a very different story, casting great doubt on Latif’s fingerprint theory. Already back in March of this year we reported on a new modelling study from the Leibniz Institute for Atmospheric Physics in Germany. The study showed that temperature fluctuations at middle altitudes are due mostly to ozone concentrations (see our blog article here). And even though we brought up this new science time and again in various newspaper and blog articles, Latif continued to keep his head in the sand and failed to acknowledge his error.
In June, 2012, his colleague Bart Verheggen jumped to his aid. In a piece, which Verheggen recycled a number of times (e.g. here or here or here), he tried to salvage whatever he could of the CO2 fingerprint theory. He wrote that we should not confuse short-term and long-term trends. Moreover, he claimed that the Kühlungsborner study involved the mesosphere while the “fingerprint” was limited to the stratosphere, and sat back thinking the issue was settled.
Now it appears that the air has finally gotten really thin for Latif’s and Verheggen’s fingerprint tale. Earlier this month a new study has appeared in the Journal of Geophysical Research written by Lorenzo Polvani of Columbia University and Susan Solomon of the Massachusetts Institute of Technology. The study closely examined the temperature development of the lower stratosphere, precisely the layer where CO2 is alleged to be causing cooling. The results of the study speak for themselves. Here’s the abstract (emphasis added):
The effect of ozone depletion on temperature trends in the tropical lower stratosphere is explored with an atmospheric general circulation model, and directly contrasted to the effect of increased greenhouse gases and warmer sea surface temperatures. Confirming and extending earlier studies we find that, over the second half of the 20th Century, the model’s lower-stratospheric cooling caused by ozone depletion is several times larger than that induced by increasing greenhouse gases. Moreover, our model suggests that the response to different forcings is highly additive. Finally we demonstrate that when ozone depletion alone is prescribed in the model, the seasonal cycle of the resultant cooling trends in the lower stratosphere is quite similar to that recently reported in satellite and radiosonde observations: this constitutes strong, new evidence for the key role of ozone depletion on tropical lower-stratospheric temperature trends.”
See original abstract here: http://www.agu.org/pubs/crossref/2012/2012JD017719.shtml.
Some years ago, Latif also claimed that winters and snowfall would disappear from Europe because of CO2. That too turned out to be a fairy tale. Prof. Latif is digging a deep hole.