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
2023Metadata
Show full item recordDescription
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
scopus:
Type
Article
Peer-Review
Yes
Language
eng