Biomass Burning in Southern Africa: Individual Particle Characterization of Atmospheric Aerosols and Savanna Fire Samples

摘要: Ambient atmospheric aerosols and savanna fireparticulate emission samples from southern Africa werecharacterised in terms of particle classes theirnumber abundance by electron probe X-ray microanalysis(EPXMA). About ten were identifiedfor each sample. The major werealuminosilicates sea salts for ambient coarse(2–10 μm equivalent aerodynamic diameter (EAD))samples, K-S S-only particles fine(<2 EAD) samples. are oneof the products biomass burning. EPXMAresults found to be consistent with resultsfrom bulk analyses on a sample basis. Forsavanna fire fine samples, quantitative EPXMA revealedthat many had composition simple saltssuch as KCl. Some deviatingcomposition sense that more ionic species wereinvolved sustaining balance between cations andanions, they composite or mixed salts.Because extensive processing during atmospherictransport, theambient was different K2SO4,and such enriched S. finepyrogenic KCl sea-saltparticles much depleted chlorine.