Etude de l'aerosol atmospherique en cote d'ivoire et dans le golfe de guinee

Abstract

Atmospheric aerosols have been sampled on filters in the air near ground level over the Ivory Coast and the Gulf of Guinea. Several elements are measured of the filters by neutron activation and γ ray spectrometry. Correlation tests applied to these elements allow us to classify them in groups of common origin. The study of the sampling collected over the Ivory Coast, along a “North-South” axis, shows an increase of the concentrations of the terrestrial elements, as one passes from the coast to the north of the country. However, no particular increase of the concentrations have been observed, in ground level air. when passing from one side of the F.I.T. to the other. In the air above the land, concentrations of marine aerosols, decrease from the coast forth, especially near it. Daily variations may be noticed for all the elements. The experiments performed in marine atmosphere, over the Gulf of Guinea, show that a high number of the elements measured are of terrestrial origin.