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This builds on previous work that identified this relationship from in situ aircraft observations with similar findings for ground\u2010based and airborne remote sensing of \u03a9HCHO. In the Long Island Sound region, \u03a9HCHO and surface ozone exhibited strong temporal (<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup>\u00a0=\u00a00.66) and spatial (<jats:italic>r<\/jats:italic><jats:sup>2<\/jats:sup>\u00a0=\u00a00.73) correlation. The temporal variability in \u03a9HCHO (\u223c1 Dobson units [DU]) was larger than the range in the spatial average (\u223c0.1\u00a0DU). The spatial average is most useful for informing ozone monitoring strategies, demonstrating the challenge in using \u03a9HCHO satellite data sets for this purpose. In Seoul, high levels of NO<jats:sub>2<\/jats:sub> resulted in O<jats:sub><jats:italic>x<\/jats:italic><\/jats:sub> better correlating with \u03a9HCHO than surface ozone due to titration effects. The \u03a9HCHO\u2013O<jats:sub><jats:italic>x<\/jats:italic><\/jats:sub> relationship may therefore reflect the sum of surface ozone and related photochemical oxidants, relevant to air quality standards set to regulate this quantity such as the U.S. EPA National Ambient Air Quality Standard (NAAQS). The relationship of \u03a9HCHO to O<jats:sub><jats:italic>x<\/jats:italic><\/jats:sub> shifted in Seoul during the campaign demonstrating the need to evaluate this relationship over longer time periods. With sufficient precision in future satellite retrievals, \u03a9HCHO observations could be useful for evaluating the adequacy of surface air quality monitoring strategies.<\/jats:p>","DOI":"10.1029\/2022jd036638","type":"journal-article","created":{"date-parts":[[2022,6,10]],"date-time":"2022-06-10T00:59:38Z","timestamp":1654822778000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Can Column Formaldehyde Observations Inform Air Quality Monitoring Strategies for Ozone and Related Photochemical Oxidants?"],"prefix":"10.1029","volume":"127","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1628-0353","authenticated-orcid":false,"given":"K. R.","family":"Travis","sequence":"first","affiliation":[{"name":"NASA Langley Research Center  Hampton VA USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7818-5506","authenticated-orcid":false,"given":"L. 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