- Ph.D. York 1982
- M.Sc. Rice 1978
- B.Sc. U.W.O. 1976
Essex is a professor of applied mathematics at the University of Western Ontario.
Essex's page at the University of Western Ontario's website displays a photo of him ice skating with the caption, “I skate on global warming.”
Stance on Climate Change
“There is no such thing as global temperature. And if there is no global temperature, how can there be global warming?” 
“The world is not going to end because of climate change, at least not in the near future.” 
June 10, 2016
The letter responds to recent investigations by U.S. Attorney General Loretta Lynch and members of Attorneys General United for Clean Power into what ExxonMobil knew about climate change and when, started by a coalition of attorneys general in the US. , 
Calvin Beisner writes that the attorneys generals' actions are “a dead giveaway that you’re ignorant about climate science and related climate and energy policy.” 
“[U]nlike in the case of tobacco’s health risks, there are innumerable and enormous holes in the case (not for human contribution to global warming but) for manmade global warming dangerous enough to justify spending trillions of dollars reinventing the world’s energy system to mitigate it, particularly when competing use of those trillions might bring far greater benefit,” Beisner addresses the attorneys general. And you, intelligent and learned all, are ignorant of those enormous holes.” 
The Cornwall Alliance lists the following signatories to its open letter: 
- E. Calvin Beisner
- Charles Clough
- Colonel John A. Eidsmoe
- Christopher Essex
- Neil L. Frank
- Victor Goldschmidt
- Rev. Peter Jones
- Madhav Khandekar
- Jamieson C. Keister
- Kevin Lewis
- Anthony R. Lupo
- Vishal Mangalwadi
- Tracy Miller
- Ben Phillips
- Shawn Ritenour
- Chris Skates
- Roy W. Spencer
- Timothy Terrell
- James Wanliss
- Anthony Watts
December 7, 2015
Christopher Essex appeared at the United Nation’s Conference on Climate Change, COP21, in Paris, France with the Heartland Institute, the Committee for a Constructive Tomorrow (CFACT), and the Competitive Enterprise Institute (CEI) to “hold a ‘counter-conference’ … called the Day of Examining the Data.”  Other notable climate science deniers that were in attendance at the “counter-conference,” included: Robert Carter, Willie Soon, S. Fred Singer, James Taylor, Patrick Moore, Wolfgang Müller, James Inhofe, and Christopher Monckton. 
Watch Christopher Essex's “counter-conference” presentation with the Heartland Institute, below (Christopher Essex's presentation begins at 2:21:05):
Christopher Essex is a contributor to the book Climate Change: The Facts published by the Institute of Public Affairs and featuring “22 essays on the science, politics and economics of the climate change debate.” The Institute of Public Affairs, while not revealing most of its funders, is known to have received funding from mining magnate Gina Rinehart and at least one major tobacco company. 
The book includes essays and articles from a range of climate change skeptics, with contributors including the following:
- Alan Moran
- Andrew Bolt
- Anthony Watts
- Bernard Lewin
- Christopher Essex
- Donna Laframboise
- Garth W. Paltridge
- Ian Plimer
- J. Scott Armstrong
- James Delingpole
- Jennifer Marohasy
- Joanne Nova
- John Abbot
- Kesten Green
- Mark Steyn
- Nigel Lawson
- Patrick J. Michaels
- Richard S. Lindzen
- Robert M. Carter
- Ross McKitrick
- Rupert Darwall
- Stewart Franks
- Willie Soon
According to Editor Alan Moran in a post at Catallaxy Files blog on Climate Change: the facts 2014, Christopher Essex “points to the complexity of the scientific analysis of the climate, which has led to exaggerated claims by pseudo-experts. He suggests a need to whittle down the numbers and listen only to those with demonstrable qualifications but does not underestimate the difficulties of determining who these are.” 
November 5, 2014
The Heartland Institute's “environmental science and policy experts” published comments following the United Nations' Intergovernmental Panel on Climate Change's (IPCC) release of its “Synthesis Report,” completing the IPCC's Fifth Assessment Report (AR5). 
Christopher Essex commented in Heartland's press release, writing that “the probabilities cited by [IPCC] aren’t scientific; they aren’t actual probabilities. They are just the opinions of fallible human beings dressed up to look scientific.”  Essex also remarked that the “ludicrous echoes,” between the IPCC and the global media, which Essex believes to have a “unique co-dependent relationship,” continue to “make the news again and again as fresh as spring flowers.” 
March 30, 2009
Essex's signature is displayed alongside a full-page ad funded by the CATO institute that appeared in numerous newspapers including the Washington Post, the New York Times and the Chicago Tribune in 2009.
The advertisement responds to President Obama's declaration that “few challenges facing America and the world are more urgent than combating climate change. The science is beyond dispute and the facts are clear” by saying that “with all due respect Mr. President, that is not true.” It goes on to describe how “there has been no net global warming for over a decade,” and how global warming is “grossly overstated.” 
March 8-10, 2009
Heartland described the conference as “a platform for scientists and policy analysts from around the world who question the theory that global warming is a crisis.” One of the main purposes of the conference was to cast doubt on the findings of the most recent IPCC report.
Essex was on the “writing team” for the Fraser Institute's 2007 independent summary for policymakers (ISPM).
The ISPM's conclusion is that “there will remain an unavoidable element of uncertainty as to the extent that humans are contributing to future climate change, and indeed whether or not such change is a good or bad thing.” 
December 13, 2007
Essex is a signatory of the December 2007 open letter to the UN Secretary-General Ban Ki-Moon.
The letter describes global warming as a natural phenomenon, and expresses how carbon dioxide is a “non-polluting gas that is essential to plant photosynthesis.” The letter further claims that the IPCC reports are “inadequate as justification” for implementing climate change policy. 
Canada's Conservative government appointed Essex to the 21-member Natural Sciences and Engineering Research Council of Canada, which oversees research grants to Canadian universities.
Critics were concerned his appointment would weaken support for climate research. “If you put someone in who doesn't believe in climate change and sees no urgency to fight against human-related climate change, you then skew the entire debate,” said New Democratic Party member of Parliament Nathan Cullen. “It's a Republican-style approach where you fund the skeptics.” 
Christopher Essex and Ross McKitrick publish Taken By Storm: The Troubled Science, Policy and Politics of Global Warming. The book won the 2002 Donner Book Prize, a $10K award “paid for in part by the Donner Canadian Foundation, which contributed $20K toward writing the book in 2002.” 
- The Fraser Institute — On the writing team for the Independent Summary for Policymakers (ISPM) of the IPCC's Fourth Assessment Report. 
According to a search of 22,000 academic journals, Essex has published over 25 original research papers in peer-reviewed journals, mainly in the area of applied mathematics.
Essex co-authored a book with Ross McKitrick in 2002 titled Taken by Storm: the troubled science, policy and politics of global warming.
Science blogger Tim Lambert examined the book, and determined that Essex's claims were based on miscalculations. 
“Christopher Essex: Professor and Associate Chair,” Department of Applied Mathematics at the University of Western Ontario. Accessed December 8, 2011.
“There is no global 'temperature'”, National Post, June 23, 2007.
“A worldwide fervor over climate change orthodoxy: Christopher Essex,” The Toronto Sun, February 22, 2010.
“Climate Change Reality,” The Cato Institute.
“Independent Summary for Policymakers: IPCC Fourth Assessment Report” (PDF), The Fraser Institute, March 2, 2007.
“Open Letter to the Secretary-General of the United Nations,” The Science and Public Policy Institute, Reprint. December 13, 2007.
Bill Curry, “Opposition parties vow to 'clean the Clean Air Act': As critics await chance to amend bill, controversy erupts over research awards,” The Globe and Mail (Canada), November 2, 2006.
“Independent Summary for Policymakers IPCC Fourth Assessment Report” (PDF), The Fraser Institute, March 2, 2007.
“Corrections to the McKitrick (2002) Global Average Temperature Series,” Deltoid, May 20, 2004.
“Christopher Essex,” SourceWatch Profile.
“On Chris Essex, Politics, Accountability and Climate Change Denial,” DeSmogBlog, November 2, 2006.
“Ross McKitrick,” SourceWatch profile.
“Heartland Institute Experts Comment on Latest United Nations Climate Report,” Heartland Institute, November 5, 2014.
“Institute of Public Affairs,” SourceWatch. Accessed May 27, 2015.
Alan Moran. “Climate Change: the facts 2014,” Catallaxy Files (blog), December 16, 2014.
“PARIS COP-21: Day of Examining the Data with The Heartland Institute, CFACT, and CEI,” Heartland Institute, December 7, 2015.
“Bringing Climate Realism to Paris at COP-21,” Heartland Institute, December 7, 2015.
E. Calvin Beisner. “Open Letter to Attorneys General about Climate Change,” Cornwall Alliance, June 10, 2016. Archived June 24, 2016. WebCite URL: http://www.webcitation.org/6iVmM7y0O
David Hasemyer. “Climate Fraud Investigation of Exxon Draws Attention of 17 Attorneys General,” InsideClimate News, March 30, 2016. Archived June 24, 2016. WebCite URL: http://www.webcitation.org/6iVncbdxJ
Ben Jervey. “State Investigations Into What Exxon Knew Double, and Exxon Gets Defensive,” Desmog, April 1, 2016.