{
  "abstract": "We present top-down CO and NOx emission estimates for a south-central Chilean fire from Sentinel-5P/TROPOMI observations. Applying the Cross-Sectional Flux method to CO and the Exponentially Modified Gaussian method to NO2, with uncertainty propagated through 500-member Monte Carlo ensembles, we retrieve a median CO flux of 1,273 kg s⁻¹ (95% CI: 676–1,843 kg s⁻¹) and a median NOx flux of 7,505 g s⁻¹ (95% CI: 3,620–9,655 g s⁻¹) on the peak fire day. Against the hourly Copernicus Atmosphere Monitoring Service Global Fire Assimilation System (GFAS) inventory, the top-down median CO flux is 21 times GFAS for the overpass hour and 4.1 times its local-day mean. The top-down NOx flux is 2.4 times GFAS at the overpass hour but 52% below its local-day mean, and the retrieved CO:NOx ratio is 8.5–8.7 times the GFAS ratio in both cases. GFAS sets its ratio with generic extratropical-forest and savanna emission factors; its forest NOx emission factor is 2.5 times a TROPOMI-derived temperate-forest value. To map the region affected by the smoke, we drove a Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) forward dispersion simulation with the retrieved CO flux: the plume traveled more than 2,000 km north-northwestward within 96 hours, along the Chilean coast and over the subtropical southeast Pacific, where TROPOMI observed enhanced CO.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Manuel Perez-Carrasco"
    },
    {
      "name": "Qindan Zhu"
    },
    {
      "name": "Cecilia Garraffo"
    },
    {
      "name": "Xiong Liu"
    },
    {
      "name": "Jia Chen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/c4x9y9r01xyge.bib",
  "cited_by": 0,
  "doi": "10.31223/x5q812",
  "fulltext_url": null,
  "id": "c4x9y9r01xyge",
  "issns": [],
  "landing_url": "https://eartharxiv.org/repository/view/15693/",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/legalcode",
  "metadata_licence": null,
  "native_subjects": [
    [
      "bepress",
      "CO"
    ],
    [
      "bepress",
      "Environmental Chemistry"
    ],
    [
      "bepress",
      "Environmental Monitoring"
    ],
    [
      "bepress",
      "Environmental Sciences"
    ],
    [
      "bepress",
      "NOx"
    ],
    [
      "bepress",
      "Physical Sciences and Mathematics"
    ],
    [
      "bepress",
      "TROPOMI"
    ],
    [
      "bepress",
      "emissions"
    ],
    [
      "bepress",
      "wildfire"
    ],
    [
      "openalex",
      "1902|Atmospheric chemistry and aerosols"
    ]
  ],
  "openalex": "W7223310433",
  "pdf_url": "https://eartharxiv.org/repository/object/15693/download/27172/",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/c4x9y9r01xyge.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:49Z",
      "native_id": "15693",
      "source": "eartharxiv",
      "url": "https://eartharxiv.org/repository/view/15693/"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "bepress:Environmental Chemistry",
      "subfield": "environmental"
    },
    {
      "field": "earth",
      "origin": "bepress:Environmental Monitoring",
      "subfield": "environmental-science"
    }
  ],
  "title": "Satellite-Based CO and NOx Emission Estimates from South-Central Chilean Plantation Fires",
  "title_text": "Satellite-Based CO and NOx Emission Estimates from South-Central Chilean Plantation Fires",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:49Z",
  "url": "https://research.draconitic.com/paper/c4x9y9r01xyge",
  "venue": "EarthArXiv",
  "versions": []
}