{
  "abstract": "Nitrogen oxides (NO x = NO + NO 2 ) in the troposphere form an array of secondary pollutants that are detrimental to air quality, ecosystems, and climate. The family of reactive oxidized nitrogen (NO y ) in the atmosphere consists of NO x and its reservoir species (e.g. HNO 3 , PAN). Our understanding of the processes underlying the transformation of NO y has advanced considerably over recent decades, however, the relative importance of NO y partitioning and loss pathways remain uncertain. In this study, we use the GEOS-Chem global chemical transport model and observations from the ATom flight campaign to assess the simulated global budget of tropospheric NO y , and the production and loss fluxes between key NO y species. Our simulation indicates that the mean global chemical lifetime of NO x is ∼ 23 h and the mean global deposition lifetime of NO y is 5.5 d. The global mean NO x :NO y ratio is 0.23 at the surface (over continents it is 0.34) and is 0.10 at 500 hPa. In addition to the four most prevalent gas-phase species (NO, NO 2 , HNO 3 , PAN) that have been central to previous descriptions of tropospheric NO y chemistry, we find that other species play key roles in driving overall chemical cycling. The model representation of organic nitrate chemistry is highly simplified and likely overestimates the importance of hydrolysis as a sink while underestimating deposition. Finally, the photolytic loss of particulate nitrate (pNO3-) to form NO 2 and HONO, as represented in our simulations, is comparable to its depositional loss, indicating the importance of further constraining this photolysis sink.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "name": "Ishir Dutta"
    },
    {
      "name": "Colette L Heald"
    },
    {
      "name": "Ilann Bourgeois"
    },
    {
      "name": "John D Crounse"
    },
    {
      "name": "Eric J Hintsa"
    },
    {
      "name": "Fred L Moore"
    },
    {
      "name": "Jeff Peischl"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9p463cagvt1nf.bib",
  "cited_by": 0,
  "doi": "10.5194/acp-26-11875-2026",
  "fulltext_url": null,
  "id": "9p463cagvt1nf",
  "issns": [
    "1680-7316",
    "1680-7324"
  ],
  "landing_url": "https://hal.inrae.fr/hal-05795444v1",
  "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/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sde"
    ],
    [
      "hal",
      "0.sdu"
    ],
    [
      "hal",
      "1.sdu.stu"
    ],
    [
      "hal",
      "2.sdu.stu.me"
    ],
    [
      "openalex",
      "1902|Atmospheric chemistry and aerosols"
    ]
  ],
  "openalex": "W7203947676",
  "pdf_url": "https://hal.inrae.fr/hal-05795444/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-21",
  "publisher": "European Geosciences Union",
  "ris": "https://research.draconitic.com/paper/9p463cagvt1nf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:55Z",
      "native_id": "hal-05795444",
      "source": "hal",
      "url": "https://hal.inrae.fr/hal-05795444v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.me",
      "subfield": "atmospheric"
    },
    {
      "field": "earth",
      "origin": "hal:0.sde",
      "subfield": "environmental-science"
    }
  ],
  "title": "Characterizing the global tropospheric budget of oxidized nitrogen (NO y )",
  "title_text": "Characterizing the global tropospheric budget of oxidized nitrogen (NO y )",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:55Z",
  "url": "https://research.draconitic.com/paper/9p463cagvt1nf",
  "venue": "Atmospheric Chemistry and Physics",
  "versions": []
}