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Journal of Atmospheric Chemistry

, Volume 22, Issue 1–2, pp 163–174 | Cite as

Ozone production due to emissions from vegetation burning

  • Günter Helas
  • Jürgen Lobert
  • Dieter Scharffe
  • Luise Schäfer
  • Johann Goldammer
  • Jean Baudet
  • Brou Ahoua
  • Ayité-Lô Ajavon
  • Jean-Pierre Lacaux
  • Robert Delmas
  • Meinrat O. Andreae
Article

Abstract

Ozone has been observed in elevated concentrations by satellites over areas previously believed to be ‘background’. There is meteorological evidence, that these ozone ‘plumes’ found over the Atlantic Ocean originate from vegetation fires on the African continent.

In a previous study (DECAFE-88), we have investigated ozone and assumed precursor compounds over African tropical forest regions. Our measurements revealed large photosmog layers at altitudes from 1.5 to 4 km. Both chemical and meteorological evidence point to savanna fires up to several thousand km upwind as sources.

Here we describe ozone mixing ratios observed over western Africa and compare ozone production ratios from different field measurement campaigns related to vegetation burning. We find that air masses containing photosmog ‘ingredients’ require several days to develop their oxidation potential, similar to what is known from air polluted by emissions from fossil fuel burning. Finally, we estimate the global ozone production due to vegetation fires and conclude that this source is comparable in strength to the stratospheric input.

Key words

ozone production pyrogenic pollutants West Africa 

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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Günter Helas
    • 1
  • Jürgen Lobert
    • 1
  • Dieter Scharffe
    • 1
  • Luise Schäfer
    • 1
  • Johann Goldammer
    • 1
  • Jean Baudet
    • 2
  • Brou Ahoua
    • 3
  • Ayité-Lô Ajavon
    • 1
  • Jean-Pierre Lacaux
    • 4
  • Robert Delmas
    • 5
  • Meinrat O. Andreae
    • 1
  1. 1.Biogeochemistry, DepartmentMax Planck Institute for ChemistryMainzGermany
  2. 2.Institute Physique de l'AtmosphèreUniversité AbidjanCôte d'Ivoire
  3. 3.INSET/Genie Chimique, YamoussoukroCôte d'Ivoire
  4. 4.Centre de Recherche Atmosphérique de CNRS, CampistrousLannemezanFrance
  5. 5.Laboratoire d'AérologieUniversité Paul SabatierToulouseFrance

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