More than 3000 concentrations data obained by the analysis of 12 trace metals in 250 snow samples collected in various locations in Antarctica have been processed through principal components factor analysis. The interpretation of the groups of covariant metals so obtained allows estimation of the relative contributions of the various aerosol sources to the trace metals content of Antarctic aerosols. Al, Fe, and Mn are shown to be crustal-derived in all locations. The origin of Na, Mg, K, and Ca depends on the distance from the sea: the influence of the marine source decreases from the sea coast to a distance of about 500 km, where the influence of the crustal source becomes predominant; it increases then toward the most central areas of the Antarctic ice cap. The 'anomalously enriched elements' Pb, Cd, Cu, Zn, and Ag are clearly shown to be derived from one or possibly several sources independent of both the oceanic and the crustal sources.