Aerosol emissions by tropical forest and savanna biomass burning: Characteristic trace elements and fluxes

摘要: Aerosol particles were collected during the dry season in amazonian forest and African Brazilian savannas. Sampling was performed inside plumes of vegetation fires local background atmosphere. Samples analysed for their elemental composition by Particle Induced X-Ray Emission (PIXE). Enrichment factors relative to calculated. Savanna fire aerosols are characterised enrichments elements like K, P, Cl, Zn, Br, whereas emissions enriched Si Ca. The unexpected low potassium enrichment factor could be due prevailing smoldering conditions, high values savanna associated with predominant flaming conditions. This result indicates that may considered a good tracer phase only. S, Ca, Mn, Br total particulate matter calculated fires. Our estimates annual zinc tropical indicate contribution this source should taken into account understand biogeochemical cycle these elements.