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- Hatakeyama H.
- Meteorological Research Institute, Tokyo
書誌事項
- タイトル別名
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- On the Disturbance of the Atmospheric Electric Field Caused by the Smoke-cloud of t he Volcano Asama-yama
抄録
The disturbance of the atmospheric electric field caused by the smoke-cloud of the Volcano Asama-yama was observed at Karuisawa Weather Station (about 9 km from the crater), Maebashi Weather Station (about 50 km from the crater) and several other temporary stations around Maebashi. At Karuisawa the disturbance of the electric field is composed, earlier, of a small positive and, later, of a large negative one, but at Maebashi the disturbance is mainly in a negative field.<BR>In the smoke-cloud the screening of ash grains with respect to height is performed by the action of gravity. Smaller ash granules have a positive electric charge and exist in the upper part of the smoke-cloud and larger ash grains have a negative electric charge and exist in the lower part of the cloud. Laboratory experiments on the electrification of volcanic ashes were made and it was confirmed that larger ash grains obtain a negative electric charge and smaller ash granules obtain a positive charge after mutual collision.<BR>Two hypotheses were proposed to explain the fact that near the crater the effect of both positive and negative charges is observed but far from it only the effect of the negative charge is observable.
収録刊行物
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- Papers in Meteorology and Geophysics
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Papers in Meteorology and Geophysics 8 (4), 302-316, 1958
Japan Meteorological Agency
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詳細情報 詳細情報について
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- CRID
- 1390282680425571456
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- NII論文ID
- 130004987354
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- ISSN
- 0031126X
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可