Abstract
Samples of atmospheric aerosol were taken over the oceans of the Southern Hemisphere by means of membrane filters. The total number concentration of particles was also measured. These samplings and measurements were carried out during the summer 1971–1972 on board the Soviet research ship, Professor Vize. The membrane filter samples were evaluated by electron and optical microscopy in the size range of 0·03 ≤ r ≤ 64·0 μm. The chemical nature of the particles was determined by morphological identification. It was found that aerosol particles consist mainly of ammonium sulphate, sea salt and of a mixture of these materials. The presence of sulphuric acid, in some cases, was also revealed. The size distribution of these particles has a maximum around 0·07-0·1 μm.
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