Observation of Large Aerosol Particles on a Remote Coral Island : An Estimation of Production Rate and Deposition Velocity of Sea-Salt Particles as a Function of Particles Size
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The analysis of time variation of size distribution of large particles observed on Minami-torishima Is. (24 ° 18' N, 152 ° 58' E) is shown. In the observation, an optical particle counter is used which is similar to the Royco counter in principle. The counter gives the size distribution of particles with a diameter of 0.5 to 10 μm (in the ambient humidity) in 15 size intervals, assuming spherical particles with an optical refractive index of 1.4. In the analysis, emphasis was laid on estimating the deposition velocity and production rate of sea-salt particles from the foam belt encircling the Island, as a function of particle size. The inferred production rate of seawater droplets of diameter intervals of 0.9 ∼ 1.8, 1.8 ∼ 3.5, 3.5 ∼ 7.6 and 7.6 μm is 1.2, 0.7, 0.5 and 0.07 × 10<SUP>3</SUP> droplets s<SUP>-1</SUP> per 1 cm<SUP>2</SUP> of the foamy area, respectively.
- 日本エアロゾル学会の論文
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