New: 2010-06-21 Just out at PNAS, my article with Bill Anderegg, Jacob Harold and Stephen Schneider entitled
"Expert Credibility in Climate Change."
My list sources page describes and links to all the
sources used in compiling the list of authors covered in the paper. NOTE: on my website below I have many more names than just those that were used in the paper, including those who have not signed any statement either way, and names that I have added since the paper was written.
First reactions at The Guardian,
CanWest News Service via Vancouver Sun,
Union of Concerned Scientists,
Jonathan Kay, National Post (excellent)
Recent mentions: Nanaimo Daily News on Al Gore's "Dirty energy, dirty weather" talk, Weather Underground, DeSmogBlog on Anti-Science Conservative politicians, Lewandowsky et al, 'Misinformation and Its Correction,' Psy.Sci.Pub.Int. Dec.2012, Weber and Stern, 'Public understanding of climate change in the U.S.,' Amer.Psychologist, 66(4) Bell, MM. An Invitation to Environmental Psychology' [Sage, 2011] Bardes, Barbara A. Public opinion: Measuring the American mind. Rowman and Littlefield, 2012.
The full plot is much faster in Firefox or Google Chrome (both free downloads - try one!). It seems to be fine in Safari on MacOS X.
News: 2009-11-19 I was interviewed about this website on The Current on CBC Radio 1, for their segment on James Hoggan's powerful new book Climate Cover-up.
Their program notes include a link to play the audio podcast [28 min. mp3 - my segment starts at 14:45 - 17:25] After me there is a 'rebuttal' segment with Lawrence Solomon.
Note: My list includes all 37 people covered in Lawrence Solomon's book The Deniers. I've noted "LSDeniers" beside these 37 names. My separate page for this group is here: Solomon's The Deniers. Several people he profiles are not climate skeptics by any stretch; as I note in the page for this list, Sami Solanki and Nigel Weiss both complained about how Solomon protrayed them. I've put "(LSDeniers)" in parentheses for those I see as most ill-fitting as "deniers."
Please download Flash Player.
Compiled by Jim Prall,
Views expressed on this site are my own and do not represent the position of my employer.
This site provides information on over 2400 climate scientists and authors who have signed public statement on climate change. This includes both statements calling for action to cut greenhouse gas emissions as well as ones that argue against such action.
Each name has a link to the person's web page at a university or national research lab, where one was found. I used Google Scholar to look up what each author had published on climate, and how widely cited their work is. This information lets us compare the credibility of those arguing against curbs on greenhouse emissions versus those supporting them.
The upshot of this comparison is that the climate change
"skeptic" position has very few authors with any standing
as climate scientists.
WARNING these next two links are to pages with HUNDREDS of photo links,
totaling over 40 MB for the larger set.
Loading these over a slow link may take eons, or may exceed the memory
limits of devices with small memory. Not recommended if you pay per
byte, as on a wireless handheld (Crackberry, web-enabled cellphone etc.)
Each photo links to the author's homepage, if known. Mouse over any photo to see their name and institutional affiliation.
Faces of most of the 619 IPCC AR4 wg 1 contributing authors
Faces of over 1300 climate authors and skeptics
We, members of the UK science community, have the utmost confidence in the observational evidence for global warming and the scientific basis for concluding that it is due primarily to human activities. The evidence and the science are deep and extensive. They come from decades of painstaking and meticulous research, by many thousands of scientists across the world who adhere to the highest levels of professional integrity. That research has been subject to peer review and publication, providing traceability of the evidence and support for the scientific method.
Thanks to my job as computer support staff at University of Toronto, I have access to electronic and/or print copies of most major journals, and a very extensive library collection of print works. I also get the opportunity to enroll in or to audit whatever courses catch my interest. I usually select one course per semester. Even when I'm just auditing, I try to do all the assigned readings. In this way I've benefited from courses on global climate change, climatology, future energy supply and demand, the physics of the greenhouse effect and planetary radiation balance, and climate politics and policy options. I also take advantage of many excellent guest lecture series, particularly those hosted by the Centre for Global Change Science in the Physics department, just across St. George St. from my office.
I've gotten pretty fed up with the undue weight given to the skeptics in the media and online. Many media reports aimed for a false 'balance' by interviewing one mainstream scientist followed by one 'skeptic.' On the web, it's even crazier, with numerous sites promoting "climate denial" by collecting names of skeptics, "quote-mining" for skeptical or ambiguous statements, and producing dodgy climate-denial 'petitions' claiming numerous "scientists" as signatories. Most of these skeptics/deniers/petition signers have little to no academic credentials in this specific field, although a handful stand out as widely published in this or a somewhat related field.
This is my shot at 'portrait of a consensus' in the journals. I offer this as a complement to work like Naomi Oereskes' review.
For each author, I look up their current or last institutional affiliation, jotting down a few words to note their areas of research, and linking to their homepage if I can. University professors almost always have one (or more), but scholars working at a government or military research institution (UK Met Office, US Navy NRL) generally do not. In several such cases I've settled for a link to their staff directory listing, which confirms they work there and gives contact info. My notes on areas of interest are sketchy at best; for better info see the author's homepage.
I've created a reference list including name, year of Ph.D. if shown, citation stats (still gathering), homepage, and photo URL. I collect this in Excel for ease of editing, then I export as tab-delimited text and run the data through a perl script to generate various HTML files.
We can use these citation stats for comparative purposes, subject to the caveat that more common names can easily match multiple unrelated authors. Journal author names are typical given only as first initial(s) and last name; it appears that searching on a full first-and-last name may not work consistently in excluding other authors with the same first initial(s), while at the same time may under-count or miss some works actually by that author.
This mixing in of false positives can often inflate the GS tot. and/or GS PAPS tot. figures. However, when viewing the citation counts, I have taken care not to count such false positives, by skimming the title, journal name, and excerpt. In that case, I try to create a custom search string to exclude false positives caused by same-named authors, before collecting the totals. This is hard to guarantee, as I'd need to review all the hits to be really certain, which is burdensome. Instead I've usually checked the first few screens of 10 results each; if there are no more false positives in the top 30, I deem the exclusions to be good enough, and the total count be 'close enough.' In some cases a name is just so common that I gave up on isolating that author's work to get the totals; in that case I've just entered "names" to indicate there were too many false positives to get a valid total.
Table of over 2900 climate authors
Table of all 619 IPCC AR4 wg 1 contributing authors Table of 225 Canadian climate scientists (including AR4wg1 and others)
WARNING these two links are to pages with HUNDREDS of photo links on one page. Loading these over a slow link may take eons, or may exceed the memory limits of devices with small memory. Not recommended if you pay per byte, as on a wireless handheld (Crackberry etc.)
Photos of over 1100 climate scientists
Photos of IPCC AR4 wg 1 contributing authors