Journal of Atmospheric Chemistry

, Volume 22, Issue 1–2, pp 175–193 | Cite as

Nitrogen compound emission from biomass burning in tropical African savanna FOS/DECAFE 1991 experiment (Lamto, Ivory Coast)

  • Robert Delmas
  • Jean Pierre Lacaux
  • Jean Claude Menaut
  • Luc Abbadie
  • Xavier Le Roux
  • Gunter Helas
  • Jurgen Lobert
Article

Abstract

Gaseous nitrogen compounds (NO x , NO y , NH3, N2O) were measured at ground level in smoke plumes of prescribed savanna fires in Lamto, in the southern Ivory Coast, during the FOS/DECAFE experiment in January 1991. During the flaming phase, the linear regression between δ[NO x ] and δ[CO2] (differences in concentration between smoke plumes and atmosheric background) results volumic emission ratio δ[NO x ]/δ[CO2]=1.37×10−3 with only slight differences between heading and backing fires. Nearly 90% of the nitrogen oxides are emitted as NO. Average emission ratios of other compounds are: 1.91, 0.047, and 0.145×10−3 for NO y , NH3 and N2O, respectively. The emission ratios obtained during this field experiment are compred with corresponding values measured during former experiments with the same plant species in combustion chambers. An accurate determination of both the biomass actually burned and of the plant nitrogen content, allows an assessment of emission fluxes of N-compounds from Guinean savanna burns. Preliminary results dealing with the influence of fire on biogenic emissions from soils are also reported.

Key words

biomass burning savanna fires biogenic emissions nitrogen compounds 

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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Robert Delmas
    • 1
  • Jean Pierre Lacaux
    • 1
  • Jean Claude Menaut
    • 2
  • Luc Abbadie
    • 2
  • Xavier Le Roux
    • 2
  • Gunter Helas
    • 3
  • Jurgen Lobert
    • 3
  1. 1.Laboratoire d'Aérologie (URA CNRS 354)Université Paul SabatierToulouseFrance
  2. 2.Laboratoire d'Ecologie, Ecole Normale SupérieureParisFrance
  3. 3.Max Planck Institut für ChemieMainzGermany

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