Manuscrit regu le 22 novembre 1977; version revisee le 15 juin 1978) RESUME L'importance de la source vegkale dam la composition des aerosols atmospheriques en Afrique de I'Ouest a ete mise en evidence. En saison des pluies, la for& est I'origine principale de la matiere vegkale presente dans Pair et le processus d'emission du potassium est discute.
ABSTRACTAtmospheric aerosols have been studied in several locations of the Ivory Coast. Valid conclusions can be drawn which show the influence of vegetation as a source of aerosols. The tropical forest appears to be the main source of aerosols issued from vegetation during the rainy season and production of potassium is shown to be particularly important.Des prelevements de poussieres atmospheriques ont ete effectues pendant une annee dans cinq stations de C6te d'Ivoire et de Haute-Volta (Fig. 1). Les aerosols, collectes sur filtres Whatman 41 pendant un an, sur des periodes de trois jours, ont ete analyses par spectrometrie d'absorption atomique et les elements suivants ont kte doses dans les fractions hydrosoluble et insoluble: Na, K, Ca, Mg, Al, Fe (Crozat et d., 1977).
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