2017 Fiscal Year Final Research Report
Development of a tephra-dispersal model using 3-dimensional eruption column model and radar observations
| Project/Area Number |
24244069
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
眞木 雅之 鹿児島大学, 地方防災教育研究センター, 特任教授 (10360364)
鈴木 雄治郎 東京大学, 地震研究所, 助教 (30392939)
小園 誠史 東北大学, 理学研究科, 准教授 (40506747)
萬年 一剛 神奈川県温泉地学研究所, 研究課, 主任研究員 (70416080)
前坂 剛 国立研究開発法人防災科学技術研究所, 観測予測研究領域, 主任研究員 (70450260)
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| Project Period (FY) |
2012-04-01 – 2017-03-31
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| Keywords | 火山噴煙 / 火山灰降下 / 数値計算 / 気象レーダー観測 / 火山防災 |
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| Outline of Final Research Achievements |
Tephra (volcanic ash) dispersal in the atmosphere causes a serious problem of aviation safety. Development of a model for an accurate forecast of tephra dispersal is desired. In this study, we have developed a new three-dimensional eruption column dynamics model, in which transportation and settling of particles are calculated, and a new diffusion-advection model of tephra dispersal, in which bending of source eruption columns is considered. We have also established a new method to determine the three-dimensional distribution of ash particles in eruption clouds based on radar observations. The models and the method of radar observations have been applied to actual volcanic eruptions (e.g., the Kirishima 2011 eruption and recent Sakurajima explosions). These developments of new techniques have improved the existing tephra dispersal model.
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| Free Research Field |
火山学
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