{
  "abstract": "Canadian wildfires in Fall of 2023 were unique regarding the observed aerosol properties using remote sensing and in situ measurements for both short-range and long-range transported plumes across North America and Europe. One of the highlights was the observation of special concave spectral curvature in AOD having maxima at higher wavelengths than the minimum measured wavelength which led to negative values of Ångström exponent in spectral ranges below 500 nm. Along with this, large accumulation mode size distributions with volume median diameters reaching about 800 nm were observed. Another unique observation was the non-monotonic spectral curvature in single scattering albedo (SSA). For most of the stations, SSA increased in the UV-Visible region and/or further remaining either constant or decreasing at longer wavelengths as observed from retrievals from column integrated (AOD) from remote sensing and coefficients from in situ measurements. Additionally, two stations in Canada and one in Europe were found to have a well-defined peak in AOD at 500 nm. These Canadian stations also displayed a non-monotonic spectral SSA with maxima at 675 nm, while the high altitude stations of Europe showed monotonically increasing SSA. Finally, a much higher (approximately 5 times) UV absorption than visible absorption indicated the presence of brown carbon and/or tar balls, which have a strong spectral dependence in imaginary refractive index. The SSA concave spectral curvature denotes the mix of black carbon and non-absorbing particulate matter and influence of particle size, while the AOD concave spectral curvature is attributed to particle size.",
  "abstract_shown": true,
  "affiliations": [
    "Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, Davos, 7260, Switzerland",
    "now at: Oak Ridge Associated Universities, Oak Ridge, 37830, United States and Goddard Space Flight Center, Greenbelt, 20771, United States",
    "PSI Center for Energy and Environmental Sciences, 5232 Villigen PSI, Switzerland",
    "Federal Office of Meteorology and Climatology, MeteoSwiss, Payerne, 1530, Switzerland",
    "Applied Physics Department, University of Granada, Granada, 18071, Spain",
    "Environmental Remote Sensing Laboratory, EPFL, Lausanne, 1015, Switzerland"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 13,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Akriti Masoom",
      "orcid": "0000-0001-8033-9714"
    },
    {
      "affs": [
        0
      ],
      "name": "Stelios Kazadzis",
      "orcid": "0000-0003-1031-0216"
    },
    {
      "affs": [
        2
      ],
      "name": "Robin Lewis Modini",
      "orcid": "0000-0002-2982-1369"
    },
    {
      "affs": [
        2
      ],
      "name": "Martin Gysel Beer",
      "orcid": "0000-0002-7453-1264"
    },
    {
      "affs": [
        0
      ],
      "name": "Jülian Gröbner",
      "orcid": "0000-0002-1549-2525"
    },
    {
      "affs": [
        3
      ],
      "name": "Martine Collaud Coen",
      "orcid": "0000-0001-6482-2941"
    },
    {
      "affs": [
        4,
        3
      ],
      "name": "Francisco Navas-Guzmán",
      "orcid": "0000-0002-0905-4385"
    },
    {
      "affs": [
        0
      ],
      "name": "Natalia Kouremeti",
      "orcid": "0000-0001-8877-3865"
    },
    {
      "affs": [
        2
      ],
      "name": "Benjamin Tobias Brem",
      "orcid": "0000-0001-6211-2815"
    },
    {
      "affs": [
        2
      ],
      "name": "Nora Nowak"
    },
    {
      "affs": [
        3
      ],
      "name": "Giovanni Martucci",
      "orcid": "0000-0001-6311-1443"
    },
    {
      "affs": [
        3
      ],
      "name": "Maxime Hervo",
      "orcid": "0000-0003-3614-1297"
    },
    {
      "affs": [
        5,
        3
      ],
      "name": "Sophie Erb",
      "orcid": "0000-0002-0700-283X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2scngzbaaf44x.bib",
  "cited_by": 14,
  "doi": "10.5194/acp-26-10801-2026",
  "fulltext_url": null,
  "id": "2scngzbaaf44x",
  "issns": [
    "1680-7316",
    "1680-7324"
  ],
  "landing_url": "https://doi.org/10.5194/acp-26-10801-2026",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2306|Atmospheric aerosols and clouds"
    ]
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  "openalex": "W7172386178",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-04",
  "publisher": "Copernicus Publications",
  "ris": "https://research.draconitic.com/paper/2scngzbaaf44x.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T13:26:58Z",
      "native_id": "W7172386178",
      "source": "openalex",
      "url": "https://doi.org/10.5194/acp-26-10801-2026"
    }
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  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:2306|Atmospheric aerosols and clouds",
      "subfield": "climate"
    }
  ],
  "title": "Long range transport of Canadian wildfire smoke to Europe in 2023: aerosol properties and spectral features of smoke particles",
  "title_text": "Long range transport of Canadian wildfire smoke to Europe in 2023: aerosol properties and spectral features of smoke particles",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T13:20:54Z",
  "url": "https://research.draconitic.com/paper/2scngzbaaf44x",
  "venue": "Atmospheric chemistry and physics",
  "versions": []
}