Investigation of the Volcanic Ashes Erupted from Mt. Sakurajima (III)

概要

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The volcanic ashes erupted from Mt. Sakurajima were colleted together with rain water monthly from April 1984 to March 1987 at 14 locations in Kagoshima city and 7 locations in Sakurajima. After the sample had been filtered, the residue was dried and weighed while the filtrate was analized for SO42-, Cl- and pH, and it was distilled and the resulting residue was taken as water-soluble matter. The amounts of sulfur oxides absorbed on PbO2 candle were measured at the same 19 locations (except for 2 locations in Sakurajima) as with ashfall measurement. The average amounts of volcanic ashes in the last three fiscal years were 316 and 3, 370 ton/km2.month at 14 locations (in Kagoshima city) and at 7 locations (in Sakurajima), respectively. Both average amounts were considerably larger than those in the previous three fiscal years (1981-1984) (112 and 2, 040 ton/km2. month, respectively). Especially, during the summer in 1985, Sakurajima volcano was greatly active. The amount of volcanic ashfall recorded at Kurokami Middle School in September 1985, 77, 200 ton/km2. month, was the highest in those recorded at all locations in the last nine years. As for the sulfur oxide pollution, Sakurajima region was fairly polluted. In February 1986 at Arimura Haisuichi, the highest amount in the last three years was observed (3.10mg/ 100 cm2-day). Acidation of rain was observed at all locations, and the highest acidity of the rain was in terms of pH 2.6 which was recorded both at Komen Elementary School and at Sakurajima Hospital in November 1986.
社団法人大気環境学会の論文

Investigation of the Volcanic Ashes Erupted from Mt. Sakurajima (III)

スポンサーリンク

概要

社団法人大気環境学会 | 論文

スポンサーリンク

Investigation of the Volcanic Ashes Erupted from Mt. Sakurajima (III)

スポンサーリンク

概要

社団法人 大気環境学会 | 論文

スポンサーリンク

社団法人大気環境学会 | 論文