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Wry Heat - by Jonathan DuHamel

Posts Tagged ‘IPCC’

Leaked IPCC report undercuts anthropogenic global warming

Friday, December 14th, 2012

The Intergovernmental Panel on Climate Change (IPCC) is in the process of preparing its next major report (called AR5 for short) to be published next year. The IPCC has been a strong proponent of human-cause global warming via our carbon dioxide emissions from burning fossil fuels. The IPCC has always downplayed solar forcing saying that total solar irradiance (TSI) is too weak to make much of a difference. In that respect, they have a point. However, the IPCC has always ignored the other, stronger major solar variation, that of the sun’s changing magnetic field which controls the amount of cloud-forming galactic cosmic rays (GCR) reaching our atmosphere.

I reported last year on the CERN experiment which reconfirmed that cosmic rays have a strong influence on cloud formation and hence on climate. In the newly leaked draft report, the IPCC now admits to the “existence of an amplifying mechanism such as the hypothesized GCR-cloud link.”

You can read the whole story about the leaks and their implications at Anthony Watts’ “Watts Up With That”(WUWT) blog here.

The IPCC authors “are admitting strong evidence (“many empirical relationships”) for enhanced solar forcing (forcing beyond total solar irradiance, or TSI), even if they don’t know what the mechanism is.” This directly undercuts the case for anthropogenic global warming.

Refer to WUWT for updates on this breaking story.

New study shows that 50% of warming claimed by IPCC is fake

Wednesday, July 18th, 2012

From C3Headlines: “The IPCC reports global warming to have increased from +0.7°C to +0.8°C over the past century. But a new peer reviewed study determines that real global warming was closer to +0.4°C, with the remaining IPCC amount claimed to be a result of man-made adjustments.”

The errors occurred because of the process of homogenization used by the IPCC to average out individual station temperature data. Anthony Watts explains the process: “In homogenization the data is weighted against the nearby neighbors within a radius. And so a station might start out as a ‘1′ data wise, might end up getting polluted with the data of nearby stations and end up as a new value, say weighted at ‘2.5′” See his graphics here.

The paper is: Steirou, E., and D. Koutsoyiannis, Investigation of methods for hydroclimatic data homogenization, European Geosciences Union General Assembly 2012, Geophysical Research Abstracts, Vol. 14, Vienna, 956-1, European Geosciences Union, 2012.

Abstract:

We investigate the methods used for the adjustment of inhomogeneities of temperature time series covering the last 100 years. Based on a systematic study of scientific literature, we classify and evaluate the observed inhomogeneities in historical and modern time series, as well as their adjustment methods. It turns out that these methods are mainly statistical, not well justified by experiments and are rarely supported by metadata. In many of the cases studied the proposed corrections are not even statistically significant.

From the global database GHCN-Monthly Version 2, we examine all stations containing both raw and adjusted data that satisfy certain criteria of continuity and distribution over the globe. In the United States of America, because of the large number of available stations, stations were chosen after a suitable sampling. In total we analyzed 181 stations globally. For these stations we calculated the differences between the adjusted and non-adjusted linear 100-year trends. It was found that in two thirds of the cases, the homogenization procedure increased the positive or decreased the negative temperature trends.

One of the most common homogenization methods, ‘SNHT for single shifts’, was applied to synthetic time series with selected statistical characteristics, occasionally with offsets. The method was satisfactory when applied to independent data normally distributed, but not in data with long-term persistence.

The above results cast some doubts in the use of homogenization procedures and tend to indicate that the global temperature increase during the last century is between 0.4°C and 0.7°C, where these two values are the estimates derived from raw and adjusted data, respectively.

Full presentation here.

The authors give an example of station temperature data corruption shown in the graphic below, compare the raw station data with the “adjusted” data:

Among the paper’s conclusions:

Homogenization practices used until today are mainly statistical, not well justified by experiments and are rarely supported by metadata. It can be argued that they often lead to false results: natural features of hydroclimatic time series are regarded errors and are adjusted.

While homogenization is expected to increase or decrease the existing multiyear trends in equal proportions, the fact is that in 2/3 of the cases the trends increased after homogenization.

I surmise that much of the false warming incorporated in the revised temperature data is due to the urban heat island effect of large population centers. Stations within population centers show higher temperature readings than nearby rural stations, and the artificial high temperatures of cities are homogenized into regional data sets. If the findings of this paper hold up, it means that all government policy to control carbon dioxide emissions is both futile and unnecessary and a great waste of resources. Now, not only is there no physical evidence that carbon dioxide emissions are the major cause of warming, there is now also good evidence that the amount of warming has been greatly exaggerated.

The old (IPCC) method of station homogenization is discussed by Steve McIntyre at Climate Audit. He notes that the method used by the IPCC “is another homemade statistical method developed by climate scientists introduced without peer review in the statistical literature. As a result, its properties are poorly known.” In studying the USHCN data in 2007 and 2008, McIntyre “observed the apparent tendency of the predecessor homogenization algorithm to spread warming from ‘bad’ stations (in UHI sense) to ‘good’ stations, thereby increasing the overall trend.”

See also:

The Case Against the IPCC and Proponents of Dangerous Anthropological Global Warming

The Assumed Authority

IPCC Admits Its Past Reports Were Junk

Examples of the urban heat island effect:

Warmer nights no proof of global warming

IPCC Admits Its Past Reports Were Junk

Tuesday, July 17th, 2012

The alleged scientific basis for all governmental global warming policy is shown to be based on junk science.

In an article at American Thinker, Joseph Bast, president of The Heartland Institute, assesses a new report from the InterAcademy Council (IAC) of the Intergovernmental Panel on Climate Change (IPCC). The report suggests many changes in procedures and points out flaws in previous reports.

Mr. Bast’s article in full (reprinted with permission):

On June 27, the Intergovernmental Panel on Climate Change (IPCC) issued a statement saying it had “complete[d] the process of implementation of a set of recommendations issued in August 2010 by the InterAcademy Council (IAC), the group created by the world’s science academies to provide advice to international bodies.”

Hidden behind this seemingly routine update on bureaucratic processes is an astonishing and entirely unreported story. The IPCC is the world’s most prominent source of alarmist predictions and claims about man-made global warming. Its four reports (a fifth report is scheduled for release in various parts in 2013 and 2014) are cited by the Environmental Protection Agency (EPA) in the U.S. and by national academies of science around the world as “proof” that the global warming of the past five or so decades was both man-made and evidence of a mounting crisis.

If the IPCC’s reports were flawed, as a many global warming “skeptics” have long claimed, then the scientific footing of the man-made global warming movement — the environmental movement’s “mother of all environmental scares” — is undermined. The Obama administration’s war on coal may be unnecessary. Billions of dollars in subsidies to solar and wind may have been wasted. Trillions of dollars of personal income may have been squandered worldwide in campaigns to “fix” a problem that didn’t really exist.

The “recommendations” issued by the IAC were not minor adjustments to a fundamentally sound scientific procedure. Here are some of the findings of the IAC’s 2010 report.

The IAC reported that IPCC lead authors fail to give “due consideration … to properly documented alternative views” (p. 20), fail to “provide detailed written responses to the most significant review issues identified by the Review Editors” (p. 21), and are not “consider[ing] review comments carefully and document[ing] their responses” (p. 22). In plain English: the IPCC reports are not peer-reviewed.

The IAC found that “the IPCC has no formal process or criteria for selecting authors” and “the selection criteria seemed arbitrary to many respondents” (p. 18). Government officials appoint scientists from their countries and “do not always nominate the best scientists from among those who volunteer, either because they do not know who these scientists are or because political considerations are given more weight than scientific qualifications” (p. 18). In other words: authors are selected from a “club” of scientists and nonscientists who agree with the alarmist perspective favored by politicians.

The rewriting of the Summary for Policy Makers by politicians and environmental activists — a problem called out by global warming realists for many years, but with little apparent notice by the media or policymakers — was plainly admitted, perhaps for the first time by an organization in the “mainstream” of alarmist climate change thinking. “[M]any were concerned that reinterpretations of the assessment’s findings, suggested in the final Plenary, might be politically motivated,” the IAC auditors wrote. The scientists they interviewed commonly found the Synthesis Report “too political” (p. 25).

Really? Too political? We were told by everyone — environmentalists, reporters, politicians, even celebrities — that the IPCC reports were science, not politics. Now we are told that even the scientists involved in writing the reports — remember, they are all true believers in man-made global warming themselves — felt the summaries were “too political.”

Here is how the IAC described how the IPCC arrives at the “consensus of scientists”:

Plenary sessions to approve a Summary for Policy Makers last for several days and commonly end with an all-night meeting. Thus, the individuals with the most endurance or the countries that have large delegations can end up having the most influence on the report (p. 25).

How can such a process possibly be said to capture or represent the “true consensus of scientists”?

Another problem documented by the IAC is the use of phony “confidence intervals” and estimates of “certainty” in the Summary for Policy Makers (pp. 27-34). Those of us who study the IPCC reports knew this was make-believe when we first saw it in 2007. Work by J. Scott Armstrong on the science of forecasting makes it clear that scientists cannot simply gather around a table and vote on how confident they are about some prediction, and then affix a number to it such as “80% confident.” Yet that is how the IPCC proceeds.

The IAC authors say it is “not an appropriate way to characterize uncertainty” (p. 34), a huge understatement. Unfortunately, the IAC authors recommend an equally fraudulent substitute, called “level of understanding scale,” which is more mush-mouth for “consensus.”

The IAC authors warn, also on page 34, that “conclusions will likely be stated so vaguely as to make them impossible to refute, and therefore statements of ‘very high confidence’ will have little substantive value.” Yes, but that doesn’t keep the media and environmental activists from citing them over and over again as “proof” that global warming is man-made and a crisis…even if that’s not really what the reports’ authors are saying.

Finally, the IAC noted, “the lack of a conflict of interest and disclosure policy for IPCC leaders and Lead Authors was a concern raised by a number of individuals who were interviewed by the Committee or provided written input” as well as “the practice of scientists responsible for writing IPCC assessments reviewing their own work. The Committee did not investigate the basis of these claims, which is beyond the mandate of this review” (p. 46).

Too bad, because these are both big issues in light of recent revelations that a majority of the authors and contributors to some chapters of the IPCC reports are environmental activists, not scientists at all. That’s a structural problem with the IPCC that could dwarf the big problems already reported.

So on June 27, nearly two years after these bombshells fell (without so much as a raised eyebrow by the mainstream media in the U.S. — go ahead and try Googling it), the IPCC admits that it was all true and promises to do better for its next report. Nothing to see here…keep on moving.

Well I say, hold on, there! The news release means that the IAC report was right. That, in turn, means that the first four IPCC reports were, in fact, unreliable. Not just “possibly flawed” or “could have been improved,” but likely to be wrong and even fraudulent.

It means that all of the “endorsements” of the climate consensus made by the world’s national academies of science — which invariably refer to the reports of the IPCC as their scientific basis — were based on false or unreliable data and therefore should be disregarded or revised. It means that the EPA’s “endangerment finding” — its claim that carbon dioxide is a pollutant and threat to human health — was wrong and should be overturned.

And what of the next IPCC report, due out in 2013 and 2014? The near-final drafts of that report have been circulating for months already. They were written by scientists chosen by politicians rather than on the basis of merit; many of them were reviewing their own work and were free to ignore the questions and comments of people with whom they disagree. Instead of “confidence,” we will get “level of understanding scales” that are just as meaningless.

And on this basis we should transform the world’s economy to run on breezes and sunbeams?

In 2010, we learned that much of what we thought we knew about global warming was compromised and probably false. On June 27, the culprits confessed and promised to do better. But where do we go to get our money back?

WryHeat comment:

This report confirms many of the criticisms “skeptics” have had about the IPCC. In my opinion, and in the opinion of many others, the IPCC reports are political rather than scientific. The EPA uses the IPCC reports to justify the EPA’s draconian regulations on energy production, especially coal. It seems that EPA regulations are based on junk science.

Policies attempting to control carbon dioxide emissions have no basis in fact, nor does the rationale for subsidizing expensive solar and wind generation of electricity.

Some of these criticisms may be found in my posts:

The Case Against the IPCC and Proponents of Dangerous Anthropological Global Warming

The Assumed Authority

IPCC and Peer Review

Book Review: The Delinquent Teenager Who Was Mistaken for the World’s Top Climate Expert, an IPCC Exposé