This is an exact inversion of the scientific method, which says that evidence always trumps theory. The IPCC is throwing away the evidence for a solar-magnetic driver of climate because it isn’t satisfied with the theories that have been proposed to account for it. This is the definition of anti-science: putting theory (or ideology, or anything) over evidence. Evidence has to be the trump card, or its not science. The IPCC is engaged in pure, definitional, anti-science, precisely inverting the scientific method.
IPCC Reviewer Alec Rawls, Omitted variable fraud: vast evidence for solar climate driver rates one oblique sentence in AR5. Watts Up With That, 22 Feb. 2012
For a superb overview of the solar theory which is at the heart of Mr. Rawls condemnation of the IPCC, see this presentation from Jasper Kirby, head of CERN's CLOUD experiment.
The quote at the top of the page is Alec Rawls's summary of the fraud he has seen at the heart of the IPCC. He makes that observation as one of the reviewers of the latest IPCC update. What he has found is how the IPCC models the climate, dismissing out of hand solar forcing and counting CO2 as a forty times more potent driver of our climate. Here is his explanation:
“Expert review” of the First Order Draft of AR5 closed on the 10th. Here is the first paragraph of my submitted critique:
My training is in economics where we are very familiar with what statisticians call “the omitted variable problem” (or when it is intentional, “omitted variable fraud”). Whenever an explanatory variable is omitted from a statistical analysis, its explanatory power gets misattributed to any correlated variables that are included. This problem is manifest at the very highest level of AR5, and is built into each step of its analysis.
Like everyone else who participated in this review, I agreed not to cite, quote or distribute the draft. The IPCC also made a further request, which reviewers were not required to agree to, that we “not discuss the contents of the FOD in public fora such as blogs.”
Given what I found—systematic fraud—it would not be moral to honor this un-agreed to request, and because my comments are about what is omitted, the fraud is easy enough to expose without quoting the draft. . . .
For the 1750-2010 period examined, two variables correlate strongly with the observed warming (and hence with each other). Solar magnetic activity and atmospheric CO2 were both trending upwards over the period, and both stepped up to much higher levels over the second half of the 20th century. These two correlations with temperature change give rise to the two main competing theories of 20th century warming. Was it driven by rapidly increasing human release of CO2, or by the 80 year “grand maximum” of solar activity that began in the early 1920′s? (“Grand minima and maxima of solar activity: new observational constraints,” Usoskin et al. 2007.)
The empirical evidence in favor of the solar explanation is overwhelming. Dozens of peer-reviewed studies have found a very high degree of correlation (.5 to .8) between solar-magnetic activity and global temperature going back many thousands of years (Bond2001, Neff 2001, Shaviv 2003, Usoskin 2005, and many others listed below). In other words, solar activity “explains,” in the statistical sense, 50 to 80% of past temperature change.
Such a high degree of correlation over such long time periods implies causality, which can only go one way. Global temperature cannot be driving solar activity, so there must be some mechanism by which solar activity is driving or modulating global temperature change. The high degree of correlation also suggests that solar activity is the primarydriver of global temperature on every time scale studied (which is pretty much every time scale but the Milankovitch cycle).
In contrast, records of CO2 and temperature reveal no discernable warming effect of CO2. There is a correlation between atmospheric CO2 and temperature, but with CO2 changes following temperature changes by an average of about 800 years (Caillon 2003), indicating that it is temperature change that is driving atmospheric CO2 change (as it should, since warming oceans are able to hold less CO2). This does not rule out the possibility that CO2 also drives temperature, and in theory a doubling of CO2 should cause about a 1 degree increase in temperature before any feedback effects are accounted, but feedbacks could be negative (dampening rather than amplifying temperature forcings), so there no reason, just from what we know about the greenhouse mechanism, that CO2 has to be a significant player. The one thing we can say is that whatever the warming effect of CO2, it is not detectable in the raw CO2 vs. temperature data.
This is in glaring contrast to solar activity, which lights up like a neon sign in the raw data. Literally dozens of studies finding .5 to .8 degrees of correlation with temperature. So how is it that the IPCC’s current generation of general circulation models start with theassumption that CO2 has done 40 times as much to warm the planet as solar activity since 1750? This is the ratio of AR5′s radiative forcing estimates for variation in CO2 and variation in total solar effects between 1750 and 2010, as listed in [the table of RF estimates in the chapter on human and natural temperature forcing factors]. RF for CO2 is entered as ___ W/m^2 while RF for total solar effects is entered as ___ W/m^2. [I'm not going to quote the actual numbers, but yeah, the ratio is an astounding 40 to 1, up from 14 to 1 in AR4, which listed total solar forcing as 0.12 W/m^2, vs. 1.66 for CO2.]
So the 50% driver of global temperature according to mountains of temperature correlation data is assumed to have 1/40th the warming effect of something whose warming effect is not even discernable in the temperature record. This is on the input side of the GCM’s. The models aren’t using gigaflops of computing power to find that CO2 has that much larger a warming effect. The warming ratio is fixed at the outset. Garbage in, garbage out.
The “how” is very simple. The 40 times greater warming effect of CO2 is achieved by blatant omitted variable fraud. As I will fully document, all of the evidence for a strong solar magnetic driver of climate is simply left out of AR5. Of the many careful empirical studies that show a high correlation between solar activity and climate, only three papers are obliquely referenced in a single sentence of the entire First Order Draft. On [page___, line ____ of the chapter on aerosols and clouds] there is a bare reference to three papers that found unspecified correlations to some climate variables, with no mention of the dramatic magnitude of the correlations, or the scope and repetition of the findings. And that’s it. Not a single other mention in the entire report. A person reading AR5 from cover to cover would come away with not even a hint that for more than ten years a veritable flood of studies have been finding solar activity to explain something on the order of half of all past temperature variation. The omission is virtually complete. . . .
Do read the whole post. Rawls goes into great detail as to how the IPCC is managing to avoid the evidence of solar as the primary driver of climate change.