{
  "abstract": "The hydroxyl radical (OH) is a key atmospheric oxidant that is important for regulating pollutant concentrations and particle formation and composition. The globally dominant formation mechanism of OH is ozone photolysis. However, the low-light conditions in the wintertime Arctic may limit OH formation through this pathway, and there is a lack of observations available to explain oxidant chemistry in polar locations. We use the Dynamically Simple Model of Atmospheric Chemical Complexity (DSMACC) 0D model to assess processes controlling the abundances of atmospheric oxidants in a subarctic city. To constrain the model, we use measurements made during the Alaskan Layered Pollution and Chemical Analysis (ALPACA) field campaign, which took place in Fairbanks, Alaska, USA, during the winter of 2022. HONO photolysis to form OH is the major chemical source of HO x in the polluted, low-light environment of wintertime Fairbanks, and formaldehyde is an important precursor for HO 2 . We find that the HO x budget is distinct between a polluted, strongly stable inversion event and a clean, weakly stable period because of the different meteorology and pollution levels regulating peroxynitric acid (PNA, HO 2 NO 2 ) cycling. Our results improve our understanding of the unique atmospheric pollution chemistry under cold and low-light conditions.",
  "abstract_shown": true,
  "affiliations": [
    "Institute for Climate and Atmospheric Science, School of Earth & Environment , , ,",
    "School of Chemistry , , ,",
    "UCLA Atmospheric & Oceanic Sciences , , ,",
    "Aix-Marseille Université, CNRS, LCE , ,",
    "LATMOS/IPSL , , ,",
    "Earth & Atmospheric Sciences , University of Houston , , ,",
    "GESTAR-II , University of Maryland Baltimore County , , ,",
    "Geophysical Institute and Department of Chemistry and Biochemistry , , , ,"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 20,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Alicia Hoffman"
    },
    {
      "affs": [
        1
      ],
      "name": "Rachel L. James"
    },
    {
      "affs": [
        1
      ],
      "name": "Dwayne E. Heard"
    },
    {
      "affs": [
        1
      ],
      "name": "Lisa Whalley"
    },
    {
      "affs": [
        1
      ],
      "name": "Daniel Stone"
    },
    {
      "affs": [
        1
      ],
      "name": "Samuel Seldon"
    },
    {
      "affs": [
        2
      ],
      "name": "Jochen Stutz"
    },
    {
      "affs": [
        2
      ],
      "name": "Jonas Kuhn"
    },
    {
      "affs": [
        2
      ],
      "name": "Sol Cooperdock"
    },
    {
      "affs": [
        3
      ],
      "name": "Brice Temime-Roussel"
    },
    {
      "affs": [
        3
      ],
      "name": "Amna Ijaz"
    },
    {
      "affs": [
        3
      ],
      "name": "Barbara D’Anna"
    },
    {
      "affs": [
        4
      ],
      "name": "Kathy S. Law"
    },
    {
      "affs": [
        4
      ],
      "name": "Slimane Bekki"
    },
    {
      "affs": [
        5
      ],
      "name": "Fangzhou Guo"
    },
    {
      "affs": [
        5
      ],
      "name": "James Flynn"
    },
    {
      "affs": [
        6
      ],
      "name": "James M. St Clair"
    },
    {
      "affs": [
        7
      ],
      "name": "Meeta Cesler-Maloney"
    },
    {
      "affs": [
        7
      ],
      "name": "William R. Simpson"
    },
    {
      "affs": [
        0
      ],
      "name": "Steve R. Arnold"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d0sgzrf74naf4.bib",
  "cited_by": 0,
  "doi": "10.1021/acsestair.6c00254",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13660409/?tool=EBI",
  "id": "d0sgzrf74naf4",
  "issns": [
    "2837-1402"
  ],
  "landing_url": "https://europepmc.org/article/PMC/PMC13660409",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sde"
    ],
    [
      "openalex",
      "1902|Atmospheric chemistry and aerosols"
    ]
  ],
  "openalex": "W7212390353",
  "pdf_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13660409/pdf/?tool=EBI",
  "pmcid": "PMC13660409",
  "pmid": null,
  "published": "2026-09-12",
  "publisher": "ACS Publications",
  "ris": "https://research.draconitic.com/paper/d0sgzrf74naf4.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:20Z",
      "native_id": "PMC:PMC13660409",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13660409"
    },
    {
      "first_seen": "2026-10-30T12:17:52Z",
      "native_id": "hal-05769010",
      "source": "hal",
      "url": "https://hal.science/hal-05769010v2"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:0.sde",
      "subfield": "environmental-science"
    }
  ],
  "title": "Photochemical Modeling of Wintertime HOx Sources and Sinks in a Subarctic Urban Location",
  "title_text": "Photochemical Modeling of Wintertime HOx Sources and Sinks in a Subarctic Urban Location",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:52Z",
  "url": "https://research.draconitic.com/paper/d0sgzrf74naf4",
  "venue": "ACS ES&T air",
  "versions": []
}