05718 IUPAC Gold Book - smog index 10.1351/goldbook.S05718 S05718 current 1 A mathematical correlation between smog and meteorological and/or pollutant concentrations associated with it. These are qualitative indices which are sometimes used in some urban communities to predict the degree of the air pollution which is expected for the coming day. air pollution https://goldbook.iupac.org/terms/view/A00195 day https://goldbook.iupac.org/terms/view/D01527 smog https://goldbook.iupac.org/terms/view/S05716 PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2214 (https://doi.org/10.1351/pac199062112167) https://goldbook.iupac.org/terms/view/S05718/html https://goldbook.iupac.org/terms/view/S05718/json https://goldbook.iupac.org/terms/view/S05718/plain Citation: 'smog index' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.S05718 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-06-28T11:12:30+00:00