https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/Head https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://www.nanopub.org/nschema#hasAssertion https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/assertion https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://www.nanopub.org/nschema#hasProvenance https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/provenance https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://www.nanopub.org/nschema#hasPublicationInfo https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/pubinfo https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://www.nanopub.org/nschema#Nanopublication https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/assertion https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://purl.org/dc/terms/creator https://orcid.org/0000-0002-0441-2614 https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://purl.org/dc/terms/creator https://orcid.org/0000-0003-3930-010X https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://purl.org/dc/terms/publisher https://ror.org/059dqb057 https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://purl.org/dc/terms/subject http://aims.fao.org/aos/agrovoc/c_694 https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/fair/ff/terms/article https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://www.w3.org/1999/02/22-rdf-syntax-ns#type https://w3id.org/fdof/ontology#FAIRDigitalObject https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://www.w3.org/2000/01/rdf-schema#comment Biomass burning particulate matter (BBPM) affects regional air quality and global climate, with impacts expected to continue to grow over the coming years. We show that studies of North American fires have a systematic altitude dependence in measured BBPM normalized excess mixing ratio (NEMR; ΔPM/ΔCO), with airborne and high-altitude studies showing a factor of 2 higher NEMR than ground-based measurements. We report direct airborne measurements of BBPM volatility that partially explain the difference in the BBPM NEMR observed across platforms. We find that when heated to 40− 45 °C in an airborne thermal denuder, 19% of lofted smoke PM1 evaporates. Thermal denuder measurements are consistent with evaporation observed when a single smoke plume was sampled across a range of temperatures as the plume descended from 4 to 2 km altitude. We also demonstrate that chemical aging of smoke and differences in PM emission factors can not fully explain the platformdependent differences. When the measured PM volatility is applied to output from the High Resolution Rapid Refresh Smoke regional model, we predict a lower PM NEMR at the surface compared to the lofted smoke measured by aircraft. These results emphasize the significant role that gas-particle partitioning plays in determining the air quality impacts of wildfire smoke. KEYWORDS: Biomass burning organic aerosol volatility, volatility basis set. Major findings: Research regarding biomass burning organic aerosol volatility reveals a systematic altitude dependence in particulate matter concentrations, with airborne studies recording values twice as high as ground-based measurements. Direct airborne quantification demonstrates that approximately 19% of lofted smoke particulate matter evaporates when subjected to surface-level temperatures. These findings indicate that gas-particle partitioning, rather than chemical aging or initial emission factors, is the primary driver of platform-dependent differences in smoke density. Applying these volatility constraints to regional models reduces predicted surface smoke concentrations by 31%, aligning model outputs more closely with observed ground-level impacts. https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF http://www.w3.org/2000/01/rdf-schema#label Impact of Biomass Burning Organic Aerosol Volatility on Smoke Concentrations Downwind of Fires https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF https://schema.org/funder https://ror.org/0078xmk34 https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF https://w3id.org/fdof/ontology#hasMetadata https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF https://www.w3.org/ns/dcat#contactPoint demetriospagonis@weber.edu https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF https://www.w3.org/ns/dcat#endDate 2023 https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF https://www.w3.org/ns/dcat#startDate 2022 https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/provenance https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/assertion http://www.w3.org/ns/prov#wasAttributedTo https://orcid.org/0009-0008-8411-2742 https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/pubinfo https://orcid.org/0009-0008-8411-2742 http://xmlns.com/foaf/0.1/name Emily Regalado https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://purl.org/dc/terms/created 2026-01-14T06:47:26.219Z https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://purl.org/dc/terms/creator https://orcid.org/0009-0008-8411-2742 https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://purl.org/dc/terms/license https://creativecommons.org/licenses/by/4.0/ https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://purl.org/nanopub/x/introduces https://pubs.acs.org/doi/pdf/10.1021/acs.est.3c05017?ref=article_openPDF https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU http://purl.org/nanopub/x/wasCreatedAt https://nanodash.knowledgepixels.com/ https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU https://w3id.org/np/o/ntemplate/wasCreatedFromProvenanceTemplate https://w3id.org/np/RA7lSq6MuK_TIC6JMSHvLtee3lpLoZDOqLJCLXevnrPoU https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU https://w3id.org/np/o/ntemplate/wasCreatedFromPubinfoTemplate https://w3id.org/np/RA0J4vUn_dekg-U1kK3AOEt02p9mT2WO03uGxLDec1jLw https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU https://w3id.org/np/o/ntemplate/wasCreatedFromPubinfoTemplate https://w3id.org/np/RAukAcWHRDlkqxk7H2XNSegc1WnHI569INvNr-xdptDGI https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU https://w3id.org/np/o/ntemplate/wasCreatedFromTemplate https://w3id.org/np/RArM5GTwgxg9qslGX-XiQ-KTTUwdoM0KB1YqmT4GqTizA https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/sig http://purl.org/nanopub/x/hasAlgorithm RSA https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/sig http://purl.org/nanopub/x/hasPublicKey MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxzr6UBGMW6c8tegz0babaledWUEQ0PLDE4tp7Iinbe2DZtAtY5JUptKYuStWDZx+QER4808P8dejNWRnBDzgthYJm/AyNSXflHSJhz2+NC+h7RylOLxbwLEQocmyKKiYxa2gT85m6ajVL2M6TnfG67nnK+K2f7iCGL6wYXRITD1q+7+5SWqBdDXIV921W4IKWaD2GJk+NRBoOqQhbsrk8Tn5XsNd7DMYVHk47oMDGbeBnrOIoRPsbBgAcoCsxxhiB9yN6Lf8EUbnlXVEDzJuZk048L1BDZL+6nkA8btTQGP2ijUFWA7rTrod3LjUDQWLZS95njjl867dtmv/znYkzwIDAQAB https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/sig http://purl.org/nanopub/x/hasSignature S85witRlnEsYA+OX6s3Fm3RDXhFwbmSJeEAKL19rtziW2rDz26yAo/JzH7tWPYedcXXR7mKJ16F0CQixhBdniTIDlqzn5Z7bwy7U65zprMet9RKFnN75DrLUkLFl2maqWBckjdZPRf/Kv64k2dLxCgzU24KgLcdYfSIBlsF+5mTW05KXUteF5pn0Lk4yXCZ+0S/+fq8oNqvuFUaWBwFVuDoE4Rqd51y2oCtxqKLNiksJ9TkzKcw9Dxsx9g69Upb2prvcIuHhlgxZfiYsXqvKu3PaKv+Iu7sCDJkBgxtDLm9ChKMBrQKKP87mXKCAJh7z/+cFDXTudPCM4n8gZV9GWA== https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/sig http://purl.org/nanopub/x/hasSignatureTarget https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU https://w3id.org/np/RADWTUfHUhTFUeGlHnnGwszP2XjGSpb0e5GDGWGPgqknU/sig http://purl.org/nanopub/x/signedBy https://orcid.org/0009-0008-8411-2742