Partly False: Nobel Physicist John Clauser Didn't Say Climate Change Doesn't Exist — But His Climate Claims Are Still Wrong
“John Clauser, a Nobel Prize laureate in physics, states that there is no climate change”
The argument in brief
A viral claim says Nobel laureate John Clauser denies climate change entirely — that's not quite what he said, but what he did say is still contradicted by the evidence. Clauser signed a declaration saying there is 'no climate emergency' and argues clouds are an underappreciated climate regulator, but climate scientists have reviewed these claims and found them inconsistent with thousands of peer-reviewed studies. His Nobel Prize was for quantum physics, not atmospheric science.
Why it spread
Appeals to authority are deeply persuasive, and a Nobel Prize is about as authoritative as it gets. For people already skeptical of climate policy, Clauser's dissent feels like validation from the highest possible source. The 'halo effect' does the rest — we instinctively assume that brilliance in one area transfers to all areas, even when it doesn't. The claim also got exaggerated in retelling, turning 'no climate emergency' into 'no climate change,' which made it spread further and faster.
The claim circulating online is that Nobel Prize-winning physicist John Clauser says climate change does not exist. This is partially false — but correcting the record doesn't let Clauser off the hook. What he actually said is still at odds with mainstream science, and the distinction matters.
Clauser signed the CLINTEL 'World Climate Declaration,' which argues there is 'no climate emergency' — a different claim from denying climate change altogether. He has also publicly argued that cloud cover regulates Earth's temperature in ways that current climate models miss, and he joined the board of the CO2 Coalition, a group that disputes mainstream climate science. These are real, heterodox positions — just not the bluntest version of the claim being shared.
The problem is that Clauser's climate arguments don't hold up. Climate Feedback asked working climate scientists to review his statements and they found them inaccurate and inconsistent with the body of peer-reviewed research. The IPCC Sixth Assessment Report, drawing on thousands of studies, concludes with unequivocal certainty that human activity has warmed the planet. The American Physical Society — the top professional body for physicists — also maintains that climate change is real and human-caused.
Clauser's Nobel Prize, awarded for groundbreaking work on quantum entanglement, is genuine and impressive. But quantum physics and atmospheric science are entirely different fields. As Reuters Fact Check noted, his climate claims go well beyond his area of expertise. Winning a Nobel in one discipline does not confer authority in another — a distinction that gets lost in how his views are being promoted.
This kind of misinformation is worth watching for because it uses a real credential to smuggle in unsupported claims. When you see a scientist's title used to challenge a consensus, always ask: is this their field? What do the actual specialists say? In this case, the specialists are clear.
Sources
- Reuters Fact Check
Clauser did sign a declaration questioning climate science and made public statements challenging the scientific consensus, but his claims misrepresent the state of climate science and go beyond his area of expertise in quantum physics.
- Climate Feedback
Climate scientists reviewed Clauser's statements and found them to be inaccurate and inconsistent with the overwhelming body of peer-reviewed climate research. Clauser's expertise is in quantum entanglement, not atmospheric science.
- CLINTEL Declaration (primary source)
Clauser signed the CLINTEL 'World Climate Declaration' which states 'there is no climate emergency,' not that climate change does not exist. This is a nuanced but important distinction from the claim as stated.
- IPCC Sixth Assessment Report
The IPCC AR6 report, representing thousands of peer-reviewed studies, concludes with unequivocal certainty that human influence has warmed the climate, contradicting Clauser's public statements.
- The Guardian
Clauser was appointed to the board of the CO2 Coalition, a group that disputes mainstream climate science. He has argued that clouds regulate Earth's temperature in ways climate models miss, a claim not supported by the broader scientific literature.
- American Physical Society
The American Physical Society, the leading professional organization for physicists, maintains that climate change is real and human-caused, directly contradicting the position Clauser has publicly advocated.