大気汚染物質の海洋への輸送(そのIII) : 海洋上へ流出したエーロゾルの除去過程に及ぼす海塩粒子の効果に関する数値実験

概要

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In order to estimate the effect of sea-salt particles on the removal processes of the continental aerosols which spread over the sea, the following numerical experiments were carried out. On the sea, the coagulation between the continental aerosols and sea-salt particles is expected to be an important removal process. Therefore only the coagulation and the sedimentation were considered in the present study. The following results were obtained from numerical experiments. If the concentration of sea-salt particles is lower than several particles/cc, they hardly have the effect on the removal of the continental aerosols. However they begin to exert the effect if the concentration of sea-salt particles is higher than several tens particles/cc. Without sea-salt particles, it takes 45 days to reach the representative concentration over the ocean (that is, 300 particles/cc) if the initial concentration of the continental aerosols is assumed to be 30,000 particles/cc. On the other hand, with sea-salt particles whose concentration is a few hundreds particles/cc, 20 days are sufficient to reach the representative concentration over the ocean.
北海道大学の論文
1982-03-25