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    Satellite Evidence of HONO/NO2 Increase with Fire Radiative Power

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    Authors
    Fredrickson, C.D.
    Theys, N.
    Thornton, J.A.
    Discipline
    Earth and related Environmental sciences
    Subject
    fire emissions
    TROPOMI
    satellite FRP
    reactive nitrogen
    nitrous acid
    Audience
    Scientific
    Date
    2023
    Metadata
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    Description
    Wildfires are important sources of atmospheric reactive nitrogen. The reactive nitrogen species partitioning generally depends on fire characteristics. One reactive nitrogen compound, nitrous acid (HONO), is a source of hydroxyl radicals and nitric oxide, which can impact the oxidizing capacity of the atmosphere and fire plume chemistry and composition. We study the Australian wildfire season of 2019–2020, known as Black Summer, where numerous large and intense wildfires burned throughout the continent. We use HONO and nitrogen dioxide (NO2) from the TROPOspheric Monitoring Instrument (TROPOMI) and fire radiative power (FRP) from the Visible Infrared Imaging Radiometer Suite to investigate HONO and NO2 relationships with fire characteristics. The ratio of HONO to NO2 increases linearly with FRP both in Australia and globally. Both Australian and global fire relationships depend strongly on land cover type. These relationships can be applied to emission inventories to improve wildfire emission representation in models.
    Citation
    Fredrickson, C.D.; Theys, N.; Thornton, J.A. (2023). Satellite Evidence of HONO/NO2 Increase with Fire Radiative Power. , Geophysical Research Letters, Vol. 50, Issue 17, e2023GL103836, DOI: 10.1029/2023GL103836.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/11064
    doi: http://dx.doi.org/10.1029/2023GL103836
    scopus:
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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