Douglas V. Hoyt

Douglas V. Hoyt


  • M.S., Astro-Geophysics, University of Colorado. [1]
  • B.S.. Physics, Rensselaer Polytechnic Institute. [1]


Douglas V. Hoyt is a retired solar physicist with Raytheon Corporation.

Hoyt appears on Senator James Inhofe‘s list of 400+ “prominent” scientists who doubt global warming.  He is listed as one of 49 who are currently retired. Inhofe’s most recent list contains over “650 international scientists.”

Stance on Climate Change

“Natural variations [in climate] must be understood before mankind’s impact can be separated out.” [2]

Key Quotes

“There are several problems with the theoretical underpinnings of the standard IPCC theory of global warming due to anthropogenic greenhouse gases (AGHG)… . the upper limit on warming due to a doubling of carbon dioxide is 0.7 C and it is probably much less. The high numbers used by the IPCC are not supported by measurements.” [3]

Key Deeds

February 4, 2018

In January 2018, more than 200 scientists endorsed an open letter calling on the American Museum of Natural History (AMNH) to remove climate change denier Rebekah Mercer from its board and to “end ties to anti-science propagandists and funders of climate science misinformation.” The New York Times reported that those among the AMNH letter calling for Mercer to step down were Michael E. Mann, director of the Earth System Science Center at Pennsylvania State University, and Katharine Hayhoe, director of the Climate Science Center at Texas Tech University. [5]

Hoyt was among a group of climate change deniers who responded with their own open letter, calling for the AMNH “not to cave in to this pressure.” The letter was signed by numerous individuals with ties to groups funded by the Mercer Family Foundation such as Will Happer of the CO2 CoalitionRichard Lindzen, a fellow at the Cato InstituteCraig Idso, the chairman of the Center for the Study of Carbon Dioxide and Global Change. There are a number of signatories affiliated with the Heartland Institute, which has received over $5.78 million from the Mercer Family Foundation since 2008. [6]

The letter reads: [7]

The Earth has supported abundant life many times in the geological past when there were much higher levels of carbon dioxide in the atmosphere. It is quite likely that future generations will benefit from the enrichment of Earth’s atmosphere with more carbon dioxide.

Make no mistake, the agitators are not defending science from quackery — quite the contrary!”

June 2010

Hoyt is a registered endorser of the International Climate Science Coalition’s (ICSC) “Climate Scientists’ Register.”

Those who sign the register agree that “We, the undersigned, having assessed the relevant scientific evidence, do not find convincing support for the hypothesis that human emissions of carbon dioxide are causing, or will in the foreseeable future cause, dangerous global warming.” [1]


Hoyt co-authored The Role of the Sun in Climate Change with Kenneth H. Shatten. The book was published by the Oxford University Press.



According to a search of 22,000 academic journals, Hoyt has published over 35 peer-reviewed articles mainly in the area of solar fluctuations. Hoyt has not published any new research since 1998.

A full list of his publications is available at His most recent book was The Role of the Sun in Climate Change, published in 1997 by the Oxford University Press. 


  1. CLIMATE SCIENTISTSREGISTER ENDORSERS,” International Climate Science Coalition. Accessed January, 2012.
  2. Douglas V. Hoyt, Kenneth H. Schatten. The Role of the sun in climate change. Page 225.
  3. Douglas Hoyt. “A CRITICAL EXAMINATION OF CLIMATE CHANGE,” Accessed January, 2012.
  4. Experts,” ICECAP. Accessed January, 2012.
  5. Robin Pogrebin and Somini Sengupta. “A Science Denier at the Natural History Museum? Scientists Rebel,” The New York Times, January 25, 2018. Archived February 13, 2018. URL
  6. Graham Readfearn. “Climate Science Deniers Defend New York’s American Museum of Natural History From Calls to Drop Trustee Rebekah Mercer,” DeSmog, February 6, 2018.
  7. mnh18-feb4-petitionletter (PDF – Untitled). Retrieved from Watts Up With That.

Other Resources

Related Profiles

APCO Worldwide Background APCO has been described as “one of the world's most powerful PR firms.” [1], [2] According to its agency profile at O'Dwyers, “APCO Worldwide is a...
Hugh W. Ellsaesser Credentials Ph.D., Meteorology. [1] Background Hugh W. Ellsaesser, born in 1920, is a meteorologist by training and retired “guest scientist” at the Lawren...
Alfred (Al) Pekarek Credentials Ph.D., University of Wyoming (1974). [1]B.A. University of Minnesota-Twin (1965). [1] Background Alfred (Al) Pekarek is a former ass...
Benny Josef Peiser Credentials Ph.D. , University of Frankfurt (1993). Peiser studied political science, English, and sports science. [1], [2] Background Benny Peiser is a sports ...