Most cited, hyped climate study of 2024 called into question by researchers

One of the most highly cited climate papers from 2024 is under review by a leading science publication for problems found with its data.

Even prior to publication, peer reviewers reportedly found errors in the methodology and conclusions, as well as problematic language in the study, but the publisher, Nature, decided to publish it anyway.

Since then, the results have been questioned by another group of researchers who looked at the objections raised previously about the data and the methodology.

The April 2024 paper, “The economic commitment of climate change,” published by the Potsdam Institute for Climate Impact Research (PIK) in Nature, centered on alarmist projections of climate change’s economic impact.

The study claimed a 19% global income reduction within 26 years and a 62% GDP loss by 2100 under a high-emissions scenario based on temperature and precipitation data from over 1,500 regions spread across 77 countries.​

The findings gained widespread attention, being quoted by liberal politicians in the U.S., at the U.N. and in the global media. The study was cited so often it was credited as the most highly cited climate change paper from 2024.

In part, that’s because of the eye-popping numbers generated by the study’s conclusion.

Using World Bank estimates of economic growth, the climate alarm paper claimed world income would be reduced $40.85 trillion by 2050 because of a warming planet. By the year 2100, world GDP would be $632.4 trillion lower annually than it otherwise would be without so-called climate change, the study implied.

For comparison, 2024 GDP for the U.S. was about $28 trillion.

The paper allowed climate change evangelists to claim the cost of mitigating factors such as carbon emissions were less expensive than the income and GDP reductions climate change would bring, and thereby justify big spending programs to stop it.

However, that conclusion looks to be flawed now, after being originally described as “unintuitively large” by one peer reviewer.

Significant methodological errors and data anomalies are being questioned by outside researchers, sparking criticism of the paper, after a previous author correction.

That criticism and correction were called out by a scientist posting on X.

David Chavous, an intellectual property attorney with a PhD and biochemistry, highlighted the data issues in a series of posts that coincided with the publication of an alert by Nature, indicating the paper might be under review, known as a “Matters Arising” article.

The critical article said that when some errors are corrected in the climate study, the conclusion is “no longer statistically distinguishable.”

Nature notes on its website that “Matters Arising” articles are formal “post-publication commentary on published papers [that] can involve either challenges, [or] clarifications.”

In his post, Chavous labeled the climate change forecast “preposterous,” citing peer reviews in images that revealed doubts about the study’s statistical robustness, empirical uncertainty and arbitrary methodological choices that might have skewed the conclusion.

Peer reviewers, whose criticisms were shared by Chavous via screenshot, had previously raised concerns during the initial review process, with one questioning the validity of the model.

Another reviewer said the paper suffered from a “hyperbolic narrative” that was not “helpful” to the conclusions in the study.

Despite these flaws, Nature published the paper.

A post from Chavous shows that the study was at least the second-most cited paper in climate crisis communications for 2024.

The new study challenging the original findings identified critical flaws, including anomalies in Uzbekistan’s data that led to a threefold overestimation of the projected GDP loss. ​

The corrected analysis reduced the economic impact to a negligible “blip in decreased growth,” undermining the original paper’s alarming conclusions.

The “Matters Arising” article also highlighted broader data-quality concerns, calling for “further investigation” into the GDP data. ​

Chavous claims Nature is “now investigating” an assertion inferred from the article’s recommendation for further scrutiny but not yet explicitly confirmed by the journal. ​

But the rapid timing of his posts, coupled with peer review images predating the article, demonstrates he might have real-time knowledge of the controversy.

The authors of the original study, however, claim that despite questions about their conclusions, the study stands, though they issued a sort of apology. ​

“The authors and PIK welcome and appreciate the feedback from the wider scientific community, and take responsibility for the oversights that led to this critique.”

​Chavous’s critique frames the climate study as an example of flawed science driving policy decisions, with the correction unlikely to receive the same level of attention as the original study.