https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/Head https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://www.nanopub.org/nschema#hasAssertion https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/assertion https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://www.nanopub.org/nschema#hasProvenance https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/provenance https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://www.nanopub.org/nschema#hasPublicationInfo https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/pubinfo https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.nanopub.org/nschema#Nanopublication https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/assertion https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://purl.org/dc/terms/creator https://orcid.org/0000-0002-4892-454X https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://purl.org/dc/terms/creator https://orcid.org/0000-0002-5886-3314 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://purl.org/dc/terms/creator https://orcid.org/0000-0002-9282-0502 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://purl.org/dc/terms/creator https://orcid.org/0000-0003-3852-3491 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://purl.org/dc/terms/language https://www.omg.org/spec/LCC/Languages/LaISO639-1-LanguageCodes/en https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://purl.org/dc/terms/publisher https://ror.org/00var5q80 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/fair/ff/terms/article https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/fdof/ontology#FAIRDigitalObject https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://www.w3.org/2000/01/rdf-schema#comment Wildfires have torn across western North America over the last decade. Smoke from wildland fires in Canada can travel thousands of kilometers to US cities and reacts with urban pollution to create harmful ozone, a criteria pollutant regulated by the US Environmental Protection Agency. Accurately quantifying this impact is needed to inform US air quality policy, but is challenging due to complex physical and chemical processes. In this study, we analyze surface and airborne measurements, alongside a new variable-resolution global chemistry-climate model, to better understand these processes. We show that the near-field conversion of nitrogen oxide (NOx) emissions from wildfires to peroxyacetyl nitrate (PAN) and other more oxidized forms reduces their localized impacts on ozone. PAN is the principal tropospheric reservoir for NOx radicals. When aged smoke plumes descend southward from Canada toward US cities, higher temperatures cause PAN to decompose and thus help production of ozone during smoke transport. On days when the observed ozone levels exceed the air quality limit (70 ppbv for 8-hr average), wildfire smoke can contribute 5–25 ppbv. Major Findings: Research using the AM4VR model demonstrates that wildfire nitrogen emissions are rapidly sequestered as peroxyacyl nitrates ($PAN$), which remain stable during long-range transport before decomposing to release NO and fuel ozone O3 production in distant urban areas. These findings reveal that such chemical evolution can increase surface O3 levels by 5 to 25 ppbv in cities thousands of kilometers downwind, particularly when pyrogenic organic compounds interact with existing urban pollution. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 http://www.w3.org/2000/01/rdf-schema#label Reactive Nitrogen Partitioning Enhances the Contribution of Canadian Wildfire Plumes to US Ozone Air Quality https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 https://schema.org/funder https://ror.org/021nxhr62 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 https://w3id.org/fdof/ontology#hasMetadata https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 https://www.w3.org/ns/dcat#contactPoint Meiyun.Lin@noaa.gov https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 https://www.w3.org/ns/dcat#endDate 2024-08-06 https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 https://www.w3.org/ns/dcat#startDate 2023-08-01 https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/provenance https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/assertion http://www.w3.org/ns/prov#wasAttributedTo https://orcid.org/0009-0008-8411-2742 https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/pubinfo https://orcid.org/0009-0008-8411-2742 http://xmlns.com/foaf/0.1/name Emily Regalado https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://purl.org/dc/terms/created 2026-01-21T17:43:10.164Z https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://purl.org/dc/terms/creator https://orcid.org/0009-0008-8411-2742 https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://purl.org/dc/terms/license https://creativecommons.org/licenses/by/4.0/ https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://purl.org/nanopub/x/introduces https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109369 https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://purl.org/nanopub/x/supersedes https://w3id.org/np/RAdSBHFMKH56LP4f5-1Y5xNSX4JJhOCUI6KT9cyWgnMJ4 https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA http://purl.org/nanopub/x/wasCreatedAt https://nanodash.knowledgepixels.com/ https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA https://w3id.org/np/o/ntemplate/wasCreatedFromProvenanceTemplate https://w3id.org/np/RA7lSq6MuK_TIC6JMSHvLtee3lpLoZDOqLJCLXevnrPoU https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA https://w3id.org/np/o/ntemplate/wasCreatedFromPubinfoTemplate https://w3id.org/np/RA0J4vUn_dekg-U1kK3AOEt02p9mT2WO03uGxLDec1jLw https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA https://w3id.org/np/o/ntemplate/wasCreatedFromPubinfoTemplate https://w3id.org/np/RAoTD7udB2KtUuOuAe74tJi1t3VzK0DyWS7rYVAq1GRvw https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA https://w3id.org/np/o/ntemplate/wasCreatedFromPubinfoTemplate https://w3id.org/np/RAukAcWHRDlkqxk7H2XNSegc1WnHI569INvNr-xdptDGI https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA https://w3id.org/np/o/ntemplate/wasCreatedFromTemplate https://w3id.org/np/RArM5GTwgxg9qslGX-XiQ-KTTUwdoM0KB1YqmT4GqTizA https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/sig http://purl.org/nanopub/x/hasAlgorithm RSA https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/sig http://purl.org/nanopub/x/hasPublicKey MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxzr6UBGMW6c8tegz0babaledWUEQ0PLDE4tp7Iinbe2DZtAtY5JUptKYuStWDZx+QER4808P8dejNWRnBDzgthYJm/AyNSXflHSJhz2+NC+h7RylOLxbwLEQocmyKKiYxa2gT85m6ajVL2M6TnfG67nnK+K2f7iCGL6wYXRITD1q+7+5SWqBdDXIV921W4IKWaD2GJk+NRBoOqQhbsrk8Tn5XsNd7DMYVHk47oMDGbeBnrOIoRPsbBgAcoCsxxhiB9yN6Lf8EUbnlXVEDzJuZk048L1BDZL+6nkA8btTQGP2ijUFWA7rTrod3LjUDQWLZS95njjl867dtmv/znYkzwIDAQAB https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/sig http://purl.org/nanopub/x/hasSignature LMxBd+Zrmhznqh5lMnQ0oJcOoHYDqcbZ8G5RPP3X43vINUPCryIDmWj0rBzujPTotGLMYTmezrlVWnCLXc41bndGqGIS+p3flZwob0WjKTnYJyT6ruTvMTldC6igi9Q+QaUj273K68C057BTE69SU8Ly3JcoT7He2P0wdxNwULcxBu6ly9btUNr9Ot+F9kZQipGMsS/FOYPvWcR9Px2B/JeHL7ewMXcZGLsFe9eNtIMK/3OVSql3UsgZAUbWLZSS0HqYAgSRUgDjPnn9Pm+krNNr5Ao75xnrjyvMZVGigQlC4kP+8WrjEBf/7QdQMlU1WFlHPul5hYs6UsZgou0cSw== https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/sig http://purl.org/nanopub/x/hasSignatureTarget https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA https://w3id.org/np/RAGzG63ueTiqGa4t4cBYpmzhIefZ619jfkNO9rzkqaqoA/sig http://purl.org/nanopub/x/signedBy https://orcid.org/0009-0008-8411-2742