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Tropospheric ozone radiative forcing uncertainty due to pre-industrial fire and biogenic emissions

Rowlinson, Matthew J.; Rap, Alexandru; Hamilton, Douglas S.; Pope, Richard J.; Hantson, Stijn; Arnold, Steve R.; Kaplan, Jed O.; Arneth, Almut; Chipperfield, Martyn P.; Forster, Piers M.; Nieradzik, Lars

Tropospheric ozone concentrations are sensitive to natural emissions of precursor compounds. In contrast to existing assumptions, recent evidence indicates that terrestrial vegetation emissions in the pre-industrial era were larger than in the present day. We use a chemical transport model and a radiative transfer model to show that revised inventories of pre-industrial fire and biogenic emissions lead to an increase in simulated pre-industrial ozone concentrations, decreasing the estimated pre-industrial to present-day tropospheric ozone radiative forcing by up to 34 % (0.38 to 0.25 W m$^{-2}$). We find that this change is sensitive to employing biomass burning and biogenic emissions inventories based on matching vegetation patterns, as the co-location of emission sources enhances the effect on ozone formation. Our forcing estimates are at the lower end of existing uncertainty range estimates (0.2–0.6 W m$^{-2}$), without accounting for other sources of uncertainty. Thus, future work should focus on reassessing the uncertainty range of tropospheric ozone radiative forcing.

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Verlagsausgabe §
DOI: 10.5445/IR/1000126438
Veröffentlicht am 19.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000126438
Erschienen in Atmospheric chemistry and physics
Band 20
Heft 18
Seiten 10937–10951
Vorab online veröffentlicht am 22.09.2020
Nachgewiesen in Scopus
Web of Science
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