Douglas V. Hoyt

Douglas V. Hoyt



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.”3Douglas V. Hoyt, Kenneth H. Schatten. The Role of the sun in climate change. Page 225.

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.”4Douglas Hoyt. “A CRITICAL EXAMINATION OF CLIMATE CHANGE,” Accessed January, 2012.

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.5Robin 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:

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 2008.6Graham Readfearn. “Climate Science Deniers Defend New York’s American Museum of Natural History From Calls to Drop Trustee Rebekah Mercer,” DeSmog, February 6, 2018.

The letter reads:7mnh18-feb4-petitionletter (PDF – Untitled). Retrieved from Watts Up With That.

“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.”8CLIMATE SCIENTISTS’ REGISTER ENDORSERS,” International Climate Science Coalition. Accessed January, 2012.


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.

Other Resources


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