Organic components in size-separated aerosols from the western North Pacific.

概要

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Marine aerosols in the western North Pacific were collected using a cascadeimpactor. Size-separated aerosols were analyzed for organic carbon, alkanes and polycyclicaromatic hydrocarbons (PAH). The results showed that the rate of decrease of the atmosphericconcentrations of these organic components with increase in distance from Japan aswell as from the coast of the Eurasian Continent was in the order PAH>>alkanes>organiccarbon. The bulk of all these organic components occurred in the smallest size fraction ofparticles (<1μm). Analysis of the alkanes and PAH indicated that the hydrocarbons inaerosols in Japanese coastal marine areas are primarily derived from terrestrial anthropogenicsources which also contribute to a lesser extent to aerosols in marine areas about 1, 000kmoff the coast of Japan. In remote marine areas the hydrocarbons on small particles (<μm) have principally a natural terrestrial origin while those on larger particles are marine inorigin.
日本海洋学会の論文