Meteotsunami Observed in Japan Following the Hunga Tonga Eruption in 2022 Investigated Using a One-Dimensional Shallow-Water Model
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- Sekizawa Shion
- Research Center for Advanced Science and Technology, the University of Tokyo
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- Kohyama Tsubasa
- Department of Information Sciences, Ochanomizu University
書誌事項
- 公開日
- 2022
- 資源種別
- journal article
- DOI
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- 10.2151/sola.2022-021
- 10.31223/x5ks78
- 公開者
- 公益社団法人 日本気象学会
説明
<p> On 15 January 2022, the volcano Hunga Tonga about 8000-km away from Japan explosively erupted. Following the eruption, tsunami-like sea-level fluctuations were observed in Japan, much earlier than expected based on the oceanic long-wave propagation from Tonga. By contrast, atmospheric pressure disturbance presumably due to the eruption was also observed about 30 minutes before the sea-level change. Therefore, the observed sea-level fluctuations can be considered as meteotsunamis forced by the pressure perturbation rather than tectonically forced by the eruption, but the mechanism is not yet fully understood.</p><p> This study attempts to understand the nature of this meteotsunami by using a simple one-dimensional shallow-water model. The results show that the time and amplitude of the observed sea-level changes are consistent with the simulated sea-level changes forced by the atmospheric forcing. A set of experiments with different bathymetry profiles also reveals the importance of amplification due to near-Proudman resonance over deep basins and the shoaling effect over the continental slope, while extremely deep and narrow topography such as trenches is of second-order importance.</p>
収録刊行物
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- SOLA
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SOLA 18 (0), 129-134, 2022
公益社団法人 日本気象学会
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詳細情報 詳細情報について
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- CRID
- 1390292483543604352
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- ISSN
- 13496476
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- 本文言語コード
- ja
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- 資料種別
- journal article
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- データソース種別
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- JaLC
- Crossref
- KAKEN
- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可