発表論文

佐賀のライダーとスカイラジオメータによって検出された桜島の火山灰の高度分布と光学特性

著者
酒井哲, 内野修, 森野勇, 永井智広, 赤穂大河, 川崎健, 奥村浩, 新井康平, 内山明博, 山崎明宏, 松永恒雄, 横田達也
雑誌名
日本リモートセンシング学会誌, 34(3), 197-204
DOI
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概要

Volcanic ash particles originating from the eruptions of Mt. Sakurajima (31.59°N, 130.66°E) were observed with Mie lidar at an altitude of 1.6–2.3 km over Saga (33.24°N, 130.29°E) on 21 and 22 August, 2013. The lidar data showed a high depolarization ratio (10–15%) and a moderately low backscatter wavelength exponent (0.6–0.7), indicating the presence of supermicrometer-sized nonspherical particles. The aerosol optical thickness at 500 nm derived from the skyradiometer were 0.12 on 21 August (13:50 LT) and 0.40 on 22 August (12:50 LT). The Angstrom exponent was 0.16–0.49 and the single scattering albedo was 0.73–0.91, indicating the predominance of supermicrometer-sized and moderately absorbing particles.