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Posts Tagged ‘scientific consensus’

The Scientist's Consensus on Global Warming

Wed ,13/03/2013

Every major scientific society in the world has adopted a statement like that of the American Chemical Society which says,

Careful and comprehensive scientific assessments have clearly demonstrated that the Earth’s  climate system is changing rapidly in response to growing atmospheric burdens of greenhouse gases and absorbing  aerosol particles. There is very little room for doubt that observed climate trends are due to human activities. The threats are serious and action is urgently needed to mitigate the risks of climate change.”

This urgent message continues to be mainly ignored by the public and our politicians. This seems strange as scientist’s trustworthiness is  highly rated by the public, with 84% having a favorable view of scientists. A recent CNN  poll  found that 97% of scientists who are actively engaged in research in climate science agree that global warming is occurring and the primary cause is man’s activities. The strongest consensus comes from the scientists who publish articles on climate science.  A recent peer-reviewed article   in the proceedings of the National Academy of Science found that 97-98% of the scientists agree with the consensus opinion with the strongest agreement coming from those who publish the most in the climate science area. A number of surveys have been taken of different group of scientists with the results shown below:

 

729px-Climate_science_opinion2[1]

 

There is clearly a  consensus among scientists on global warming,  but the public’s opinion  continues to be divided about what scientists think. On the question of whether scientists agree that the earth is warming mostly because of human activity; 45% say scientists agree while 43% say they do not. That is because the 3% of the climate scientists who do not agree with the scientific consensus  receive an inordinately large amount of publicity.  Efforts to  discredit the climate scientist’s consensus usually involve quoting scientists who doubt the opinion of the 97%, then  claiming that destroys the whole consensus. However, those  scientists likely started out in the 3% who doubted the consensus to begin with.

Disagreements in science are usually settled by the evidence. To see what the consensus actually is, you just have to look at the peer-reviewed literature.  James Powell examined the scientific consensus in terms of the number of published articles either agreeing or disagreeing with the consensus. His search of peer-reviewed scientific articles published between January, 1991 and November, 2012 with the keywords “global warming” or “global climate change” produced 13,950 articles. He classified as “rejecting” articles that clearly and explicitly stated that the theory of global warming is false or that some other process better explains the observed warming. Only 24 articles,or 0.17%, rejected the consensus, as represented by the thin red line on the pie chart below.

 

Powell-Science-Pie-Chart

 

 

Of the 24  articles  that rejected the consensus opinion, several  were published by gaming the peer review system. An analysis by John Mashey showed fourteen articles rejecting the consensus opinion were published in Climate Research while Chris de Freitas,  a biased climate change Skeptic, was the editor. Most of the articles claiming the Earth is not warming or that man does not have a major role have been found to have errors or have  been disproven by later research.

Note added on 06/11/2013: A recent paper in the Environmental Science Newsletter in May  found that 97% of the climate scientists support the consensus opinion.
Note added on 07/15/2015: James L. Powell, director of the National Physical Sciences Consortium, reviewed more than 24,000 peer-reviewed papers on global warming published in 2013 and 2014. Only five reject the reality of rising temperatures or the fact that human emissions are the cause, with four of those papers using arguments which had been debunked. Powell found the consensus is now “99.9% plus.”

(c) 2013 J.C. Moore

Gaming the Peer Review System: Part 2. Exploiting Loopholes

Fri ,03/02/2012

There is evidence that the authors of a recent paper may have gamed the peer review system to publish a biased climate science paper.

The Review Process: When a paper is submitted to a journal for publication, the editor removes the name of the author and sends the manuscript to several experts in the area, usually three, for review. The editor keeps the names of the reviewers confidential. If an error is found, the reviewer’s comments are returned to the author with suggestions for corrections. It is a good system for ensuring the quality of research publications, but even then papers are sometimes published that contains errors. The reviewers may miss an error, a biased editor may publish the paper in spite of flaws, or authors may exploit loopholes in a journal’s rules to get a paper published. Some journals allow the author to suggest names of reviewers and the editor often picks reviewers from the list. Most scientists submit names of reliable reviewers as it is an embarrassment to have errors found in their paper after publication. However, even if the papers are properly reviewed, the practice can bring accusations of “pal” review. Since reviewer’s names are kept confidential by the editor, it is difficult to know for sure whether that may have happened. However, there is evidence that the authors of a recent paper may have gamed the system by suggesting a set of reviewers that shared their bias. See what you think.

The paper: Last July 25th, Roy Spencer and Danny Braswell authored a paper in the rather specialized technical journal, Remote Sensing, titled “On the Misdiagnosis Of Surface Temperature Feedbacks From Variations In Earth’s Radiant Energy Balance“.  The paper claimed “The sensitivity of the climate system to an imposed radiative imbalance remains the largest source of uncertainty in projections of future anthropogenic climate change. Here we present further evidence that this uncertainty from an observational perspective is largely due to the masking of the radiative feedback signal by internal radiative forcing, probably due to natural cloud variations.”  It seems that only an expert in climatology would know what that means or what its implications were, but in three days a sensationalized version of the paper appeared on internet sites, in major business magazines, and in news articles in major newspapers. Millions of people likely read about the paper.

The Publicity: The renewed public interest in science should have made climate scientists pleased; however, they were not. Beneath the technical language is a claim that the climate sensitivity to CO2 has been misinterpreted by climate scientists because of natural cloud variations. Were it true, it would mean that natural forces, not man, were responsible for much of the observed global warming. That idea had been examined before and found to be inconsistent with the evidence, but the idea is one that some climate skeptics have been promoting. And, they are part of a well-funded pipeline that carries misinformation about climate science to major news outlets before all the facts can be known.

Forbes: One main branch of the misinformation pipeline runs through the Heartland Institute, where James Taylor is listed as a senior fellow. James Taylor once wrote articles for the tobacco industry suggesting that secondhand smoke was not harmful, and he has now turned his talents to denying the ties between rising CO2 levels and global warming. Inexplicably, James Taylor has been hired by Forbes magazine to write on energy and environmental topics. James Taylor picked up on Spencer’s paper and wrote an article for Forbes titled, New NASA Data Blows Gaping Hole In Global Warming Alarmism. Not only was the title inaccurate and misleading, but the article was clearly an opinion article, miscategorized as news.  The editors of Forbes might not have known that Spencer’s “NASA Data” was the same data that climate scientists use to reach a very different conclusion, but perhaps they should have noticed that no reasonable news story would describe climate scientists as “alarmists” 15 times. The business community considers legislation that would reduce our carbon emissions to be anti-business, and business newspapers such as Investors Business Daily, the Wall Street Journal, and Forbes often are biased toward the skeptic’s position. The bias shows up in story selection, opinions miscategorized as news, a disproportionate number of skeptics articles on opinion pages, and  in sensationalized headlines. From Forbes, the article was picked up as a news story by other business magazines, Yahoo! News, MSNBC, and skeptic’s blog sites, which had a field day with the article. It is sad that millions will have read the distorted article, but few will ever read the climate scientist’s rebuttal. The article will soon sink into obscurity,  but it will have accomplished it’s purpose, which was to spread doubt about climate change.

Reproducibility: Publication in a peer-reviewed journal is not the only requirement for a paper to become accepted as part of the science literature. The research must stand up to the scrutiny of other experts in the field and it must be reproducible by other scientists with comparable knowledge and skill. Spencer’s paper reached the news media before climate scientists had a chance to respond, but they soon found a number of obvious errors in the paper. Trenberth and Fasullo summed it up:”The model has no realistic ocean, no El Niño, and no hydrological cycle, and it was tuned to give the result it gave. The bottom line is that there is NO merit whatsoever in this paper.”  Given time, A.E. Dessler analyzed Spencer’s paper in detail and published a rebuttal. The abstract in Geophysical Review Letters reports the key points of his paper:

  • Clouds are not causing climate change;
  • Observations are not in disagreement with models on this point;
  • Previous work on this is flawed;  ( referring specifically to Spencer’s paper in Remote Sensing).

Clearly, Spencer’s paper had serious methodological flaws and was not reproducible. How did the paper get through Remote Sensing’s peer review process? The answer would likely not have been found, except for the publicity.

The Catastrophe: The editor of Remote Sensing, who had been trying to build the reputation of the Journal, considered the publicity a catastrophe. The instructions in Remote Sensing asks authors to suggest five reviewers, and it is possible that Spencer could choose five skeptics.  The editor would not have to pick from those, but apparently in this case he did.  In the next issue of Remote Sensing, the editor, Dr. Wolfgang Wagner, resigned and issued a public apology for this article saying, “With this step I would also like to personally protest against how the authors and like-minded climate skeptics have much exaggerated the paper’s conclusions in public statements.” “The problem is that comparable studies published by other authors have already been refuted in open discussions and to some extent also in the literature, a fact which was ignored by Spencer and Braswell in their paper and, unfortunately, not picked up by the reviewers. “ And he concluded, “But, as the case presents itself now, the editorial team unintentionally selected three reviewers who probably share some climate sceptic notions of the authors.”

© 2012 J.C. Moore

 

Global Warming: Media Bias and the Misinformation Pipeline

Thu ,18/08/2011

 

The Scientific Consensus: All the major scientific organizations in the world have endorsed a  statement similar to that of the American Chemical Society:

”Careful and comprehensive scientific assessments have clearly demonstrated that the Earth’s climate system is changing rapidly in response to growing atmospheric burdens of greenhouse gases and absorbing aerosol particles. There is very little room for doubt that observed climate trends are due to human activities. The threats are serious and action is urgently needed to mitigate the risks of climate change.” 

  This urgent message continues to be mainly ignored by the public and our politicians. This seems strange as scientist’s trustworthiness is  highly rated  by the public, with 84% having a favorable view of scientists .  In spite of the scientist’s warning, a  Gallup poll found American’ s concern about global warming has fallen from just three years ago, when 66%  said they were worried about the problem, to only 51% today   A recent CNN  poll  found that 97% of scientists who are actively engaged in research in climate science agree that global warming is occurring and the primary cause is man’s activities. There is clearly a scientific consensus on the matter, but the public seems confused on the issue. That is because the 3% of the climate scientists who do not agree with the scientific consensus receive an inordinately large amount of publicity.

The Misinformation Pipeline: While skepticism based upon reason makes science stronger, many of the skeptics do not have that as a goal.  Many skeptics publish their articles in rather obscure journals where they are not peer-reviewed by competent climate scientists.  Occasionally, one of the skeptics has a paper published in a major journal, and though some of these make major contributions, many of them are later found to contain incorrect assumptions and errors. The errors are usually pointed out in letters and articles in the journals, and should require retraction or correction, but some of the skeptics have refused to do so, and instead launch attacks upon their critics. While other climate scientists are well aware of the errors, the general public is not, and they often remember the controversy  as evidence that ” the science is not settled”. These controversies, and erroneous results, are often delivered to the public through a well-funded misinformation pipeline. The pipeline carries the misinformation from the uncorrected or obscure journals articles to blog sites, through biased institutes and think tanks, and often into respectable newspapers and magazines. Spin is added along the way and the headlines are made more and more sensational as the information moves along the pipeline. What comes out of the pipeline often bears little resemblance even to the original article, but that matters little as the purpose of the pipeline is to spread doubt.

Speed is of the essence as it is important to get the message “out there” before it can be debunked. Because, once “out there”, it is  difficult to correct it in the minds of the public. One good example of this is the controversy that arose over an article by Steig, et. al. which had been featured on the cover of Nature. Steig found that over the last fifty years, the Antarctic had been getting warmer by 0.1 C per decade. A year later, an article with the headline “O’Donnell et al 2010 Refutes Steig et al 2009″ appeared on many news and blog sites. However, O’Donnell’s paper was nowhere to be found. The source of the headline was traced to skeptic Steve McIntyre’s ClimateAudit website. It turned out that McIntyre was one of the authors of the paper, and he had circulated the phony headline over two weeks before O’Donnell’s paper was published. Now, that is fast. And O’Donnell’s article hardly refuted Steig’s, as he also found that Antartica was warming, but a slightly different geographical pattern.  

Tracing a Path: A more recent example was an article that appeared on MSNBC’s Newsvine blog site. The headline read:  New NASA Data Blow Gaping Hole In Global Warming Alarmism – Yahoo! News and it had the summary :

 The underlying physics does not support the James Hansen CO2 model and nor does the data. End of Story.”

That is certainly not accurate, as Hansen, the director of NASA, has published many peer-reviewed articles  based upon NASA’s data that show that CO2 is primarily responsible for global warming. It was unlikely that a single article published by climate skeptic Roy Spencer in the rather obscure journal, Remote Sensing, would blow a hole in anything. Nor was it the end of the story.  Tracing the story backwards shows how misinformation about global warming is rapidly spread through the news media. I reported this story to Newsvine as inaccurate and mis-categorized. The headline is sensationalized, and no reasonable news story would describe climate scientists as “alarmists” 15 times. However, Newsvine did not act as it was categorized as “news” by Yahoo!News. I contacted Yahoo!News and explained that it was a violation of journalistic ethics to categorize an opinion article as news. I received a reply quickly, but it mainly passed the buck to Forbes, saying:

“We are not responsible for the content contained within news articles or headlines from outside source providers. If you would like to report incorrect information provided in a news article from one of these outside source providers, please contact the publisher at www.forbes.com. “ I replied to Yahoo! News, suggesting that if someone there couldn’t make a decision about the matter, they might wish to change their name to Yahoo! News and Opinion so they would be covered in the future. I also sent a complaint to Forbes, but apparently Forbes is not very concerned as they have yet to reply. (1)

Forbes. The article in Forbes was written by James Taylor, who is listed as a fellow at the Heartland Institute. You may remember James Taylor, as he wrote a number of articles for the tobacco industry suggesting that secondhand smoke was not harmful. His article in Forbes was categorized as a news article since he claimed the information came from a “press release”. But when I clicked on the link to the “press release”, I ended up at a blog site run by Roger Pielke, a proverbial climate skeptic. There the supposed “news release” was titled: “Comments On The Paper ‘On the Misdiagnosis Of Surface Temperature Feedbacks From Variations In Earth’s Radiant Energy Balance’ By Spencer and Braswell 2011” . I suppose James Taylor considers Roger Pielke’s  comments as news, but not everyone feels that way. And, in case the reader missed the significance of  Pielke’s comments, underneath them he recommended a post on Roy Spencer’s blog site titled: ” Is Gore’s Missing Heat Really Hiding in the Deep Ocean?” Wait a minute! It was Spencer who wrote the original journal article and his blog article would indicate that Spencer might have a bias.

Spencer’s Paper: Spencer’s paper was published in a normally reputable but little-known journal, Remote Sensing . The article was listed as being peer-reviewed, but is unlikely that the article was peer-reviewed by anyone with an expertise in climate science. As soon as climate scientists had time to analyze the article, they found a number of errors. According to Andrew Dessler, professor of atmospheric sciences, Texas A&M University: “He’s taken an incorrect model, he’s tweaked it to match observations, but the conclusions you get from that are not correct.” And, an analysis by climate scientists Trenberth and  Fasullo says in part:  “The model has no realistic ocean, no El Niño, and no hydrological cycle, and it was tuned to give the result it gave. The bottom line is that there is NO merit whatsoever in this paper.” That about sums it up. *

Timeline: The article may have had little scientific merit,  but the misinformation pipeline that delivered it was certainly efficient.  In this case, a paper titled “On the Misdiagnosis Of Surface Temperature Feedbacks From Variations In Earth’s Radiant Energy Balance“, with significant errors, was published in Remote Sensing on July 25. It appeared as a “Comments on …”  article on Roger Pielke’s blog site on July 26, then passed through the Heartland Institute where it somehow became a “press release”. Along the way, it morphed into James Taylor’s article, New NASA Data Blow Gaping Hole In Global Warming Alarmism,  which appeared July 27 in Forbes, where it was now categorized as a news article. It then appeared on  July 28 on Yahoo!News and MSNBC’s Newsvine, again mis-categorized as news, with the title New NASA Data Blow Gaping Hole In Global Warming Alarmism – Yahoo! News.  Three days after publication, an erroneous and sensationalized version was on the major news network. Since then, a number of other blog sites and news sources have picked up the sensationalized version of the article and possibly millions of people have read it. Very few of those will read the climate scientist’s opinion of the article.The article will soon sink into obscurity,  but it will have accomplished it’s purpose, which was to spread doubt about climate change. And that’s why the public is confused.

Correcting the problem: The solution is for the news media to follow journalism’s ethics and to avoid biasMedia Bias  refers to censorship or propagandism on the part of particular news sources, where content is framed in the light of a preconceived agenda, such as favoring a station’s corporate economic interests, having a political slant, or sensationalism that tends to distort news to make it a better commercial “product.” The business community considers legislation that would reduce our carbon emissions to be antibusiness(2). Many business newspapers, magazines, and journals reflect that bias and even the leaders such as Investors Business Daily, the Wall Street Journal, and Forbes are often biased toward the skeptic’s position. The bias shows up in the news stories selected, opinions mis-categorized as news, selecting a disproportionate number of skeptics articles for opinion pages, and writing or allowing sensational headlines on the opinion articles. Yes, the editors have complete control over what op-ed pieces and letters are published and they often write the headlines for opinion articles. An egregious example of this is a Wall street Journal article titled “Science Has Spoken, Global Warming Is a Myth”. The article turned out to be a hoax , but it came right before the Senate was to consider the Kyoto Treaty and may have influenced the Senate to reject ratification. While the editors might not have known that the article was based on flawed science, they certainly should have realized that two biochemists, who had little experience in climate science, could not speak for all science on such an important matter. 

Journalism’s Ethics: Unethical practices by new sources is a great disservice to its readers and, in this case, to the entire world. It should certainly be expected that  journalists and news media follow the Ethical code of The Society of Professional Journalists, who believe that it is the ethical duty of the journalist to:

Seek the Truth and Report it: Journalists should be honest, fair and courageous in gathering, reporting and interpreting information.

Act Independently: Journalists should be free of obligation to any interest other than the public’s right to know.

Be Accountable: Journalists are accountable to their readers, listeners, viewers and each other.

It is a principle of professional ethics that anyone who practices the profession, whether a member of the professional organization or not, is bound by the code of ethics of the profession. In this case, the ethical code would apply to anyone who claims to reports the news, even bloggers.

(c) 2010 J.C. Moore

* Note added 9/3/2011:  In the latest issue of Remote Sensing, the editor, Dr. Wolfgang Wagner, resigned and issued a public apology for this article saying, “With this step I would also like to personally protest against how the authors and like-minded climate sceptics have much exaggerated the paper’s conclusions in public statements.” “The problem is that comparable studies published by other authors have already been refuted in open discussions and to some extent also in the literature, a fact which was ignored by Spencer and Braswell in their paper and, unfortunately, not picked up by the reviewers.“

(1) It is a serious violation of journalism ethics to represent an opinion article such as this as a news story. Please let Yahoo know how you feel about this by reporting it as abuse at this  link >>  

 It may also be reported as an ethical violation to Forbes at readers@forbes.com .

(2) That is not really the case. The LA Times reported that a group of International investors, responsible for more than $15 trillion in assets, issued a global warming warning. (2) They called for the world’s nations, particularly the United States, to move decisively to combat climate change or face the possibility of economic disruptions even worse than the global recession of the last two years. They also pointed out that “The economic opportunities are enormous for nations with the foresight to seize them while the risks of inaction are potentially catastrophic.”

(c) 2010 J.C. Moore