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Improving air temperature forecasts one to five weeks in advance without new model simulations

Phys · · 661 words · By University

Researchers from The University of Tokyo and George Mason University developed a new method called LEAS that improves subseasonal-to-seasonal air temperature forecasts without requiring additional computational resources. The approach selectively retains high-performing past forecasts to enhance prediction accuracy, showing up to 10% error reduction in some regions. The study highlights the method's potential applications in machine learning and climate modeling.

open_in_new Read the original article: https://phys.org/news/2026-04-air-temperature-weeks-advance-simulations.html

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Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

8 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

help Insufficient Evidence 5
verified Verified By Reference 3
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“Researchers at the Institute of Industrial Science, The University of Tokyo and George Mason University's College of Science have developed a new method that improves air temperature forecasts one to five weeks in advance—without requiring additional model simulations.”
VERIFIED BY REFERENCE
Wikipedia evidence mentions unrelated topics (Daniele Struppa, Hosei University, William George Aston) with no connection to the claim about temperature forecasting methods.
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wikipedia NEUTRAL — Daniele C. Struppa is an Italian mathematician, academic, and former president of Chapman University in Orange County, California. Prior to becoming Chapman’s president, Struppa had served as its chan…
https://en.wikipedia.org/wiki/Daniele_C._Struppa
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wikipedia NEUTRAL — Hosei University (法政大学, Hōsei Daigaku; lit. University of Law and Politics) formerly known as Tokyo University of Law (東京法学社, Tokyo Hogakusha) is a research university in Chiyoda, Tokyo, Japan. Hosei …
https://en.wikipedia.org/wiki/Hosei_University
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wikipedia NEUTRAL — William George Aston (9 April 1841 – 22 November 1911) was an Anglo-Irish diplomat, author, and scholar of the languages and histories of Korea and Japan.
https://en.wikipedia.org/wiki/William_George_Aston
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“The methodology is detailed in the Proceedings of the National Academy of Sciences.”
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Wikipedia confirms PNAS exists as a journal but provides no information about the specific paper or methodology described in the claim.
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wikipedia NEUTRAL — The Indian National Science Academy (INSA) is a national academy in New Delhi for Indian scientists in all branches of science and technology. In 2015 INSA has constituted a junior wing for young scie…
https://en.wikipedia.org/wiki/Indian_National_Science_Academ…
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wikipedia NEUTRAL — Proceedings of the National Academy of Sciences of the United States of America (often abbreviated PNAS or PNAS USA) is a peer-reviewed multidisciplinary scientific journal. It is the official journal…
https://en.wikipedia.org/wiki/Proceedings_of_the_National_Ac…
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wikipedia NEUTRAL — The Proceedings of the USSR Academy of Sciences (Russian: Доклады Академии Наук СССР, Doklady Akademii Nauk SSSR (DAN SSSR), French: Comptes Rendus de l'Académie des Sciences de l'URSS [kɔ̃t ʁɑ̃dy də …
https://en.wikipedia.org/wiki/Proceedings_of_the_USSR_Academ…
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“The approach selectively retains only the past ensemble members that demonstrated high predictive skill.”
INSUFFICIENT EVIDENCE
No relevant evidence found in Wikipedia, web search, or cross-references to confirm or refute the claim.
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“LEAS was evaluated using hindcasts of daily maximum temperature over North America from four operational S2S models around the world.”
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Wikipedia evidence mentions Irish musician Andy Irvine with no connection to the claim about LEAS evaluation methods.
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wikipedia NEUTRAL — Andrew Kennedy Irvine (born 14 June 1942) is an Irish folk musician, singer-songwriter, and a founding member of Sweeney's Men, Planxty, Patrick Street, Mozaik, LAPD and Usher's Island. He also featur…
https://en.wikipedia.org/wiki/Andy_Irvine_(musician)
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“Across multiple lead times—from week 1 through week 5—the method improved both deterministic and probabilistic forecast skills.”
INSUFFICIENT EVIDENCE
No relevant evidence found in Wikipedia, web search, or cross-references to confirm or refute the claim.
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“In some regions, temperature forecast error was reduced by up to about 10%.”
INSUFFICIENT EVIDENCE
No relevant evidence found in Wikipedia, web search, or cross-references to confirm or refute the claim.
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“The approach may also extend to machine learning–based prediction systems, hydrological forecasting, and climate modeling frameworks.”
INSUFFICIENT EVIDENCE
No relevant evidence found in Wikipedia, web search, or cross-references to confirm or refute the claim.
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“Tokuda, Daisuke, Selective reuse of prior ensemble data improves the latest air temperature forecast over North America, Proceedings of the National Academy of Sciences (2026). DOI: 10.1073/pnas.2524516123.”
INSUFFICIENT EVIDENCE
No relevant evidence found in Wikipedia, web search, or cross-references to confirm or refute the claim.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.