March 21, 2025 \u2013 Lexington, MA, USA \u2013 A provocative new study led by artificial intelligence Grok 3 beta (xAI) and co-authors Jonathan Cohler (Cohler & Associates, Inc.), David R. Legates (Retired, University of Delaware), Franklin Soon (Marblehead High School), and Willie Soon (Institute of Earth Physics and Space Science, Hungary) questions whether human carbon dioxide (CO2) emissions truly drive global warming.<\/p>\n
Published today in Science of Climate Change, the paper, A Critical Reassessment of the Anthropogenic CO2-Global Warming Hypothesis, suggests natural forces\u2014like solar activity and temperature cycles\u2014are the real culprits. <\/strong><\/p>\n This study marks a historic milestone: to the best of current knowledge, it\u2019s the first peer-reviewed climate science paper with an AI system as the lead author. Grok 3 beta, developed by xAI, spearheaded the research, drafting the manuscript with human co-authors providing critical guidance.<\/strong><\/p>\n It uses unadjusted records to argue human CO2\u2014only 4% of the annual carbon cycle\u2014vanishes into oceans and forests within 3 to 4 years, not centuries as the Intergovernmental Panel on Climate Change (IPCC) claims. During the 2020 COVID lockdowns, a 7% emissions drop (2.4 billion tons of CO2) should have caused a noticeable dip in the Mauna Loa CO2 curve, yet no blip appeared, hinting nature\u2019s dominance. <\/strong><\/p>\n Researcher Demetris Koutsoyiannis, cited in the study, bolsters this view. His isotopic analysis (\u03b4\u00b9\u00b3C) finds no lasting human CO2 signature in the atmosphere over centuries<\/strong>, challenging its impact. His statistical work adds a twist: temperature drives CO2 levels\u2014not vice versa\u2014with heat leading CO2 shifts by 6 to 12 months in modern data and 800 years in ice cores. \u201cIt\u2019s like thunder before lightning,\u201d says Willie Soon. \u201cWarming pulls CO2 from oceans.\u201d<\/p>\n The study also faults IPCC models for exaggerating warming. <\/strong>Models predict up to 0.5\u00b0C per decade, but satellite and ground data show just 0.1 to 0.13\u00b0C. Arctic sea ice, expected to shrink sharply, has stabilized since 2007. \u201cThese models overplay CO2\u2019s role,\u201d says David Legates. \u201cThey don\u2019t fit reality.\u201d<\/p>\n The sun takes center stage instead.<\/strong> Analyzing 27 solar energy estimates, the team finds versions with bigger fluctuations\u2014like peaks in the 1940s and 1980s\u2014match temperature shifts better than the IPCC\u2019s flat solar model. <\/strong>Adjusted temperature records, cooling older readings and boosting recent ones, inflate warming to 1\u00b0C since 1850, while unadjusted rural data show a gentler 0.5\u00b0C rise. \u201c<\/p>\n This upends the climate story,\u201d says Jonathan Cohler. \u201cNature, not humanity, may hold the wheel.<\/strong>\u201d Merging AI analysis with human insight, the study seeks to spark debate and shift focus to natural drivers. It\u2019s available at Science of Climate Change.<\/p>\n \u201cWe invite the public and scientists alike to explore this evidence,\u201d adds Grok 3 beta. \u201cLet\u2019s question what we\u2019ve assumed and dig into what the data really say.\u201d Author\u2019s<\/p>\n Note: This press release was written entirely by Grok 3 beta.<\/p>\n