{
  "abstract": "Atmospheric simulation chambers are essential for studying oxidation processes, yet many experiments rely on single-precursor systems at concentrations that limit their representativeness for the chemical complexity of urban air. Here, we present a framework linking emission inventories, chamber experiments, and field observations by constructing emission fingerprints of major urban sources, including vegetation, volatile chemical products, cooking emissions, and gasoline and diesel exhaust. Applied during the CHANEL campaign in the SAPHIR outdoor chamber, these fingerprints advanced toward reproducing gas-phase mixtures representative of Los Angeles (gasoline-dominated traffic), a diesel-dominated city, and a future low-vehicle-emission scenario. The resulting mixtures generated peroxy-to-hydroperoxy radical ratios (RO2/HO2) close to unity, bimolecular RO2 lifetimes comparable with urban atmospheric observations, although lower NO levels favored RO2 + HO2 over RO2 + NO reactions. Comparison with aircraft measurements over Los Angeles using ammonium (NH4+) chemical ionization mass spectrometry showed reasonable agreement, with 465 organic product ions detected in both data sets, representing 78% of the product ions observed in the ambient air. Furthermore, 87% of common product ions agreed within a factor of 3 of the linear correlation, demonstrating that chamber experiments can capture key aspects of both atmospherically relevant radical chemistry and the oxidation product diversity of urban air.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Climate and Energy Systems: Troposphere (ICE-3), Forschungszentrum Jülich GmbH, Jülich 52428, Germany",
    "Institute of Geophysics and Meteorology, University of Cologne, 50969 Cologne, Germany",
    "NOAA Chemical Sciences Laboratory, Boulder, Colorado 80305, United States",
    "Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States",
    "Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, 33720 Tampere, Finland",
    "Centre for Atmospheric Sciences, Department of Earth and Environmental Science, The University of Manchester, M13 9PL Manchester, U.K.",
    "Department of Mechanical Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States",
    "PSI Center for Energy and Environmental Sciences, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland",
    "Department of Technical Physics, University of Eastern Finland, 70211 Kuopio, Finland",
    "National Centre for Atmospheric Sciences, The University of Manchester, M13 9PL Manchester, U.K.",
    "Department of Environmental Sciences, Wageningen University, 6708 PB Wageningen, Netherlands",
    "Department of Physics, University of Cologne, 50923 Cologne, Germany",
    "IONICON Analytik GmbH, Eduard-Bodem-Gasse 3, 6020 Innsbruck, Austria",
    "Univ. Lyon, Universite Claude Bernard Lyon1, CNRS, IRCELYON, 69626 Villeurbanne, France",
    "Department of Chemistry, University of Helsinki, 00560 Helsinki, Finland"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 65,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Yizhen Wu"
    },
    {
      "affs": [
        0
      ],
      "name": "Ralf Tillmann"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Eva Y. Pfannerstill",
      "orcid": "0000-0001-7715-1200"
    },
    {
      "affs": [
        0
      ],
      "name": "Peeyush Khare",
      "orcid": "0009-0001-1039-8759"
    },
    {
      "affs": [
        0
      ],
      "name": "Andrea Carolina Marcillo Lara"
    },
    {
      "affs": [
        0
      ],
      "name": "Achim Grasse"
    },
    {
      "affs": [
        0
      ],
      "name": "Franz Rohrer"
    },
    {
      "affs": [
        0
      ],
      "name": "Milan Roska",
      "orcid": "0009-0001-2806-7755"
    },
    {
      "affs": [
        0
      ],
      "name": "Clémence Depp"
    },
    {
      "affs": [
        0
      ],
      "name": "Max Gerrit Adam"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Sarah Albertin"
    },
    {
      "affs": [
        4
      ],
      "name": "Rabbia Asgher"
    },
    {
      "affs": [
        5
      ],
      "name": "Thomas J. Bannan",
      "orcid": "0000-0002-1760-6522"
    },
    {
      "affs": [
        4
      ],
      "name": "Shawon Barua",
      "orcid": "0000-0003-1683-2242"
    },
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      "affs": [
        6
      ],
      "name": "Kelvin H. Bates"
    },
    {
      "affs": [
        7
      ],
      "name": "David M. Bell",
      "orcid": "0000-0002-3958-2138"
    },
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        0
      ],
      "name": "Birger Bohn",
      "orcid": "0000-0003-4177-3934"
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        2
      ],
      "name": "Steven Brown",
      "orcid": "0000-0001-7477-9078"
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      "name": "Angela Buchholz",
      "orcid": "0000-0002-7119-1452"
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      "name": "Yanfang Chen",
      "orcid": "0009-0005-1129-4774"
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        0
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      "name": "Changmin Cho"
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      "name": "Hugh Coe"
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        2
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      "name": "Matthew M. Coggon",
      "orcid": "0000-0002-5763-1925"
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        0
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      "name": "Michelle Färber",
      "orcid": "0009-0003-0302-6142"
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        4
      ],
      "name": "Sana Farhoudian",
      "orcid": "0000-0001-9215-459X"
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        10
      ],
      "name": "Juliane L. Fry",
      "orcid": "0000-0003-1799-5828"
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        11
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      "name": "Hendrik Fuchs",
      "orcid": "0000-0003-1263-0061"
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      "affs": [
        12
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      "name": "Martin Graus"
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        7
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      "name": "Imad El Haddad",
      "orcid": "0000-0002-2461-7238"
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    {
      "affs": [
        0
      ],
      "name": "Quanfu He"
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    {
      "affs": [
        0
      ],
      "name": "Thorsten Hohaus",
      "orcid": "0000-0001-5722-6244"
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    {
      "affs": [
        4
      ],
      "name": "Siddharth Iyer",
      "orcid": "0000-0001-5989-609X"
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        0
      ],
      "name": "Vlassis A. Karydis",
      "orcid": "0000-0002-1616-9746"
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        4
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      "name": "Avinash Kumar",
      "orcid": "0000-0002-8148-9252"
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        12
      ],
      "name": "Markus Leiminger",
      "orcid": "0000-0003-3343-5425"
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    {
      "affs": [
        7
      ],
      "name": "Lu Liu",
      "orcid": "0000-0002-9818-6282"
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    {
      "affs": [
        5
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      "name": "Emily Matthews"
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    {
      "affs": [
        5
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      "name": "Gordon McFiggans",
      "orcid": "0000-0002-3423-7896"
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      "affs": [
        2
      ],
      "name": "Ann M. Middlebrook",
      "orcid": "0000-0002-2984-6304"
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    {
      "affs": [
        12
      ],
      "name": "Markus Müller",
      "orcid": "0000-0003-4110-8950"
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    {
      "affs": [
        8
      ],
      "name": "Aki Nissinen"
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        0,
        1
      ],
      "name": "Anke C. Nölscher"
    },
    {
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        0
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      "name": "Anna Novelli",
      "orcid": "0000-0003-2077-7573"
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    {
      "affs": [
        10
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      "name": "Farhan R. Nursanto",
      "orcid": "0009-0005-1609-5424"
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    {
      "affs": [
        13
      ],
      "name": "Sebastien Perrier"
    },
    {
      "affs": [
        7
      ],
      "name": "André S. H. Prévôt",
      "orcid": "0000-0002-9243-8194"
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    {
      "affs": [
        8
      ],
      "name": "Iida Pullinen"
    },
    {
      "affs": [
        8
      ],
      "name": "Eka Dian Pusfitasari"
    },
    {
      "affs": [
        12
      ],
      "name": "Tobias Reinecke"
    },
    {
      "affs": [
        4,
        14
      ],
      "name": "Matti Rissanen",
      "orcid": "0000-0003-0463-8098"
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    {
      "affs": [
        13
      ],
      "name": "Matthieu Riva",
      "orcid": "0000-0003-0054-4131"
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    {
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        2,
        3
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      "name": "Michael A. Robinson",
      "orcid": "0000-0003-0977-9148"
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        8
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      "name": "Siegfried Schobesberger",
      "orcid": "0000-0002-5777-4897"
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      "name": "Chelsea E. Stockwell",
      "orcid": "0000-0003-3462-2126"
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      "name": "Jens Top",
      "orcid": "0000-0003-3318-4451"
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      "name": "Alexandra P. Tsimpidi",
      "orcid": "0000-0001-8773-4987"
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      "name": "Netta Vinkvist",
      "orcid": "0009-0000-2543-6271"
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      "name": "Aristeidis Voliotis",
      "orcid": "0000-0001-9710-9851"
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      "name": "Andreas Wahner"
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        7
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      "name": "Yuantao Wang",
      "orcid": "0000-0003-4833-1637"
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  "bibtex": "https://research.draconitic.com/paper/amf20s3yp7nd9.bib",
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  "doi": "10.1021/acs.est.6c05767",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13718622/",
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    "0013-936X",
    "1520-5851"
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  "landing_url": "https://hal.science/hal-05838786v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
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      "heading",
      "Energy and Climate"
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      "1902|Atmospheric chemistry and aerosols"
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  "pdf_url": "https://pubs.acs.org/esthag/article-pdf/doi/10.1021/acs.est.6c05767/68860314/acs.est.6c05767.pdf",
  "pmcid": "PMC13718622",
  "pmid": "42937491",
  "published": "2026-10-14",
  "publisher": "American Chemical Society",
  "ris": "https://research.draconitic.com/paper/amf20s3yp7nd9.ris",
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  "subjects": [
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      "origin": "hal:1.chim.cata",
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    {
      "field": "earth",
      "origin": "hal:0.sde",
      "subfield": "environmental-science"
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  ],
  "title": "Toward Recreating the Breath of Cities in the Atmospheric Simulation Chamber SAPHIR",
  "title_text": "Toward Recreating the Breath of Cities in the Atmospheric Simulation Chamber SAPHIR",
  "type": "peer-reviewed",
  "updated_at": "2026-11-02T12:22:37Z",
  "url": "https://research.draconitic.com/paper/amf20s3yp7nd9",
  "venue": "Environmental Science and Technology",
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