Archives par mot-clé : Consensus

REBUTTAL: IPCC SR15 Climate Change Report is Based on Faulty Premises

by Anthony Watts, October 31, 2018 in WUWT

Friends of Science Society is critical of the IPCC SR15 report, pointing out the following:

  1. 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.’

  2. 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.

  3. 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.

Une Pensée Unique pour Jacques Duran

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.

President “Trump thinks scientists are split on climate change”… He’s right, Dana Nuccitelli is wrong

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.

Climate Change Reconsidered II

by NIPPC, October 2018

The Nongovernmental International Panel on Climate Change (NIPCC) is what its name suggests: an international panel of nongovernment scientists and scholars who have come together to understand the causes and consequences of climate change. Because we are not predisposed to believe climate change is caused by human greenhouse gas emissions, we are able to look at evidence the Intergovernmental Panel on Climate Change (IPCC) ignores. Because we do not work for any governments, we are not biased toward the assumption that greater government activity is necessary.


NIPCC traces its roots to a meeting in Milan in 2003 organized by the
Science and Environmental Policy Project (SEPP), a nonprofit research and education organization based in Arlington, Virginia. SEPP, in turn, was founded in 1990 by Dr. S. Fred Singer, an atmospheric physicist, and incorporated in 1992 following Dr. Singer’s retirement from the University of Virginia. NIPCC is currently a joint project of SEPP, The Heartland Institute, and the Center for the Study of Carbon Dioxide and Global Change.


What is the Meaningful 97% in the Climate Debate?

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.

Three Climate Change Questions Answered

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.


Is climate alarmist consensus about to shatter?

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 (…)

11th International Conference on Climate and Energy IKEK-11, Contre-COP 23

IKEK-11, Contre-COP 23, November 9, 2017

Introduction: EIKE against the World?

Dr. Holger Thuß

President, Europäisches Institut für Klima und Energie (EIKE)

US Climate and Energy Policy after 10 Months Trump
Zero Hour for Climate Alarmists?
Marc Morano
Editor in Chief and Director of Communication CFACT

The German Energiewende – Germany’s Green Path, between Illusion and Reality,

Prof. Dr. Helmut Alt, FH Aachen

Measurements vs. Models


60 scientists call for EPA endangerment finding to be reversed

by  Anthony Watts, October17, 2017 in WUWT, Press release

Electricity Consumers Fully Support Scientists’ Letter to EPA Calling for Immediate Reopening of its GHG Endangerment Finding

 Key Points: This Letter from over 60 highly credentialed scientists states that: “We the undersigned are individuals who have technical skills and knowledge relevant to climate science and the GHG Endangerment Finding. We each are convinced that the 2009 GHG Endangerment Finding is fundamentally flawed and that an honest, unbiased reconsideration is in order.”


by Ferenc Janko et al., , September 2017, in GWPF

Debate and controversy concerning the issue of climate change generally results in the hindering and obstruction of social and governmental action on this issue. This paper analyses the scientific background, i.e. the reference list of the IPCC Fifth Assessment Report ‘‘The Physical Science Basis’’ and an alternative climate change report of a US think tank institute ‘‘Climate Change Reconsidered II. Physical Science’’.

See also here

Natural climate variability, part 2: Interpretation of the post 2000 temperature standstill

by N. Scaffetta et al., September1, 2017 in Int.J.Heat.Technology

The period from 2000 to 2016 shows a modest warming trend that the advocates of the anthropogenic global warming theory have labeled as the “pause” or “hiatus.” These labels were chosen to indicate that the observed temperature standstill period results from an unforced internal fluctuation of the climate (e.g. by heat uptake of the deep ocean) that the computer climate models are claimed to occasionally reproduce without contradicting the anthropogenic global warming theory (AGWT) paradigm. In part 1 of this work, it was shown that the statistical analysis rejects such labels with a 95% confidence because the standstill period has lasted more than the 15 year period limit provided by the AGWT advocates themselves.

See also here

Open letter to UN Secretary-General: Current scientific knowledge does not substantiate Ban Ki-Moon assertions on weather and climate, say 125-plus scientists

by Habibullo I. Abdussamatov  +125/et al., November 29, 2012, in Washington Post

On November 13, 2012, you said at Yale: “The science is clear; we should waste no more time on that debate.”

We the undersigned, qualified in climate-related matters, wish to state that current scientific knowledge does not substantiate your assertions.

An Inconvenient Split?

by Paul Matthews, August 13, 2017 in CimateScepticism

In many ways, the climate debate has hardly changed since I got interested in it about ten years ago. Public opinion wobbles up and down with hardly any real change. The same tired arguments and claims come round again: every climate conference is the last chance to save the planet; the Arctic ice is always about to vanish in one or two years, or ten years; climate scientists continue to be accused of selecting data sets to create hockeysticks and manipulating data; and teams of climate scientists keep producing reports saying almost exactly the same thing as the previous reports, which then get misrepresented and hyped by the media.

Alarm about alarmism

by Judith Curry, July 15, 2017 in ClimateEtc.

In understanding climate change risk, and deciding on the ‘if’ and ‘what’ of ‘action’,  we need to acknowledge that we don’t know how the climate of the 21st century will play out (Deep Uncertainty, folks).  Four possibilities:

  1. It is possible that human-caused climate change will be swamped by much larger natural climate variability.

  2. It is possible/plausible  that the sensitivity of the climate is on the low end of the IPCC envelope (1.0-1.5C), with a slow creep of warming superimposed on much larger natural variability.

  3. It is possible/plausible that the IPCC projections are actually correct (right for the wrong reasons; too much wrong with the climate models for much credibility, IMO).

  4. It is possible that AGW and natural variability could conspire to cause catastrophic outcomes