by Judith Curry, August 21, 2019 in ClimateEtc.
A new book by Oppenheimer, Oreskes et al. entitled ‘Discerning Experts: The Practices of Scientific Assessment for Environmental Policy‘ makes a case against consensus seeking in climate science assessments.
I have long railed against the consensus-seeking process used by the IPCC (see my previous blog posts on this topic). And particularly, my paper:
Oppenheimer has long voiced concerns about consensus (e.g. his 2007 paper). However, Oreskes has been consensus enforcer in chief, originating the 97% thingy.
I haven’t read their new book, but authors Oreskes, Oppenheimer and Jamison have written an essay on their book in Scientific American, entitled Scientists have been underestimating the rate of climate change.
You can see where this is going from the title of this article; most of this is an attempt to justify alarmism. But they make some interesting points. Excerpts:
Lets stop manufacturing consensus about climate change. Lets open up the scientific debate on climate change and celebrate disagreement and use it to push the knowledge frontier of climate science. The whole consensus thing has done little to reduce global CO2 emissions, which was the point of the whole exercise. It’s time for new approaches to both science and policy.
by K. Richard, July 22, 2019 in NoTricksZone
A few decades ago it was “consensus” science that CO2 levels had reached 400 ppm (and even up to 500 ppm) during the Early Holocene, with rising amplitudes of greater than 200 ppm and rates of 65 ppm in less than a century. Then the “consensus” opinion changed.
In 1982 it was still quite acceptable for Dr. Flohn, a climate scientist, to acknowledge that changes in CO2 concentration changes are significantly determined by temperature “rather independent of” fossil fuel emissions, but also that Holocene CO2 concentrations reached 350 to 400 ppm between 8,000 to 6,000 years ago (Flohn, 1982).
Why the discrepancy between “consensus” CO2 and historically recorded CO2?
Polish physicist Dr. Zbigniew Jaworowski (1997) was a fierce critic of the means by which ice core data have been collected to assign CO2 concentration values to past epochs.
His criticisms center around the post-1985 tendencies for fellow scientists to openly employ selection bias in making pre-determined decisions about what measurements are “right” and which ones are “wrong” – effectively rendering their results meaningless.
He cites Pearlman et al. (1986), for example. These authors collected 74 Antarctic ice core CO2 samples. Of those, 32 (43%) were rejected because they had values that were too high or too low to match with the agreed-upon pre-determination.
In what other branch of science is it acceptable to discard measured data we don’t agree with?
by K. Richard, June17, 2019 in NoTricksZone
In the first 5½ months of 2019, over 200 scientific papers have been published that cast doubt on the position that anthropogenic CO2 emissions function as the climate’s fundamental control knob…or that otherwise serve to question the efficacy of climate models or the related “consensus” positions commonly endorsed by policymakers and ²²²²mainstream media sources.
These 200+ new papers affirm the position that there are significant limitations and uncertainties inherent in our understanding of climate and climate changes, emphasizing that climate science is not settled.
More specifically, the papers in this compilation support these four main skeptical positions — categorized here as N(1) – N(4) — which question climate alarm.
by Dr. D. Thresher, January 4, 2019 in ClimateChangeDispatch
The results of NASA GISS’s climate model, oft-cited as proof of global warming, are thus still questionable since the model is almost certainly full of bugs.
Pointing all this out, particularly on RealClimatologists.org, is how I became known as a climate change denier.
by K. Richard, January 3, 2019 in NoTricksZone
In 2018, over 500 scientific papers were published that cast doubt on the position that anthropogenic CO2 emissions function as the climate’s fundamental control knob…or that otherwise serve to question the efficacy of climate models or the related “consensus” positions commonly endorsed by policymakers and mainstream media sources.
by Cap Allon, December 20, 2018 in Electroverse
For those still blindly banging the ‘97%’ drum, here is a in-no-way-comprehensive list of the SCIENTISTS who publicly disagree with the current consensus on climate change –namely the IPCC’s catastrophic conclusions.
There are currently 85 names on the list. Though it is embryonic and dynamic.
Suggestions for omissions and/or additions can be added to the comment section below and, if validated, will serve to update the list.
SCIENTISTS ARGUING THAT GLOBAL WARMING IS PRIMARILY CAUSED BY NATURAL PROCESSES
— scientists that have called the observed warming attributable to natural causes, i.e. the high solar activity witnessed over the last few decades.
Khabibullo Abdusamatov, astrophysicist at Pulkovo Observatory of the Russian Academy of Sciences.
Sallie Baliunas, retired astrophysicist, Harvard-Smithsonian Center for Astrophysics.
Timothy Ball, historical climatologist, and retired professor of geography at the University of Winnipeg.
Ian Clark, hydrogeologist, professor, Department of Earth Sciences, University of Ottawa.
Vincent Courtillot, geophysicist, member of the French Academy of Sciences.
Doug Edmeades, PhD., soil scientist, officer of the New Zealand Order of Merit.
David Dilley, B.S. and M.S. in meteorology, CEO Global Weather Oscillations Inc. 
David Douglass, solid-state physicist, professor, Department of Physics and Astronomy, University of Rochester.
Don Easterbrook, emeritus professor of geology, Western Washington University.
by Anthony Watts, October 31, 2018 in WUWT
Friends of Science Society is critical of the IPCC SR15 report, pointing out the following:
We are in the Meghalayan, not the Anthropocene. The IPCC SR15 report claims to view climate change through “the lens of the Anthropocene.” This term is popularly used to describe a modern geological period wherein humans are assumed to have a larger impact on the world than nature. On July 13, 2018, the International Union of Geological Sciences (IUGS) issued a statement that the earth is now in the Meghalayan, a period that began 4,200 years ago. In response to questions as to why the term “Anthropocene” had not been included, at least for the past 50 years of presumed human influence, the IUGS responded that the term “Anthropocene” has not even been submitted for consideration and that the term has only sociological, not scientific relevance. The IPCC should not use this ‘lens.’
All climate models (simulations) used by the IPCC run ‘too hot’ versus observations. The computer simulations project future warming (thus being the rationale for global warming climate policies) show significantly higher temperatures than what is being observed. Only the Russian climate model and satellite/weather balloon data closely match present temperatures in the lower troposphere. This suggests that most climate models ascribe too great an effect of warming (climate sensitivity) to carbon dioxide.
This means the climate models should not be used to set public policy.
No temperature can be accurately measured to a precision of less than ±0.1°C. global temperature data is a metric of averaged and adjusted data from many sources, suggesting that a 0.5°C difference in temperature is moot and an arbitrary figure. It does not reference an actual measurement of earth’s temperature; people are being misled.
by Prof. dr. Paul Berth, 29 octobre 2018 in ScienceClimatEnergie
Le physicien Jacques Duran, fondateur du célèbre site Pensée Unique et pionnier du climato-réalisme en France, est décédé ce vendredi 26 octobre 2018.
Son site internet est toujours online. Si vous ne le connaissez pas, allez vite le voir. Copiez le et diffusez le. Il est vraiment Unique! Il est abondamment documenté et illustré, et représente une véritable mine de connaissances sur le climat. Son site, créé en 2006 sous le pseudonyme de Jean Martin, est dédié à tous ceux qui ont conservé un esprit critique et qui se refusent à absorber sans réfléchir une grande partie des nouvelles de toutes sortes qui nous parviennent chaque jour.
by David Middleton, October 23, 2018 in WUWT
Scientists are very divided on climate change
Much of my rebuttal was put together from prior WUWT posts on this subject, there’s at least one new addition to the vast evidence of scientific division (Stenhouse et al., 2017).
Stenhouse et al., 2014 told us that atmospheric scientists are very divided on climate change over the past 150 years.
89% × 59% = 52%… A far cry from the oft claimed 97% consensus.
by Tim Ball, September 29, 2018 in WUWT
In media interviews or discussions with the public, the most frequent opening challenge is; “But don’t 97% of scientists agree?” It is usually said obliquely to imply that you know a lot, and I don’t understand, but I assume you are wrong because you are in the minority. I don’t attempt to refute the statistics. Instead, I explain the difference in definitions between science and society. Then I point out that the critical 97% figure is that at least 97% of scientists have never read the claims of the IPCC Reports. How many people reading this article have read all the IPCC Reports, or even just one of them? If you have, it is probably the deliberately deceptive Summary for Policymakers (SPM). Even fewer will have read the Report of Working Group I: The Physical Science Basis. Naively, people, especially other scientists, assume scientists would not falsify, mislead, misrepresent, or withhold information. It is worse, because the IPCC deliberately created the false claim of consensus.
by Wallace Manheimer, June 4, 2018 in ClimateChangeDispatch
A claimed nearly unanimous scientific consensus on fear of climate change has caused a push to substantially reduce or even eliminate the use of fossil fuel in favor of solar and wind.
But three crucial questions are: 1) is the scientific community really united? 2) can solar and wind take over any time soon to provide the required vital energy for the maintenance of modern civilization in today’s world of 7 billion people?, and 3) has CO2 caused any harm yet? The answer to all three questions is no.
A major theme of this essay is that many assertions can easily be checked out by a simple Google search.
by A. Watts, May 2, 2008 in WUWT
A new study by climatologists Nicholas Lewis and Judith Curry concludes that Earth’s “equilibrium climate sensitivity” (ECS) to more atmospheric carbon dioxide is as much as 50% lower than climate alarmists have been claiming. That their paper was published in the Journal of Climate suggests that the asserted “97% consensus” of climate experts may be eroding.
Or as Cornwall Alliance founder Cal Beisner puts it (paraphrasing Winston Churchill) it may not be the beginning of the end of climate alarmism. But it could be the end of the beginning of alarmism as the dominant, ever-victorious tenet of our times.
Indeed, say other noted climatologists, there are good reasons to think ECS and alarmist errors are even greater than 50 percent. For one thing, there is no persuasive reason to assume our planet’s climate system (…)
by Paul Bert, 20 Novembre 2017, in Contrepoints
15 000 scientifiques lancent un cri d’alarme sur l’état de la planète à la COP23. Penchons-nous sur la rigueur de leur démarche.
Voir également ici, also see here