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The Effect of Asymmetric Insular Shelf in Trapping Long Gravity Waves around an Island
https://doi.org/10.15083/0000032876
https://doi.org/10.15083/0000032876714e455a-8db6-4068-ba37-ea36c14302a3
名前 / ファイル | ライセンス | アクション |
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ji0611002.pdf (1.6 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-05-30 | |||||
タイトル | ||||||
タイトル | The Effect of Asymmetric Insular Shelf in Trapping Long Gravity Waves around an Island | |||||
言語 | en | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15083/0000032876 | |||||
ID登録タイプ | JaLC | |||||
その他のタイトル | ||||||
その他のタイトル | 島棚の非対称性が長波の捕捉に及ぼす影響 | |||||
著者 |
橋本, 道明
× 橋本, 道明 |
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著者別名 | ||||||
識別子 | 128180 | |||||
識別子Scheme | WEKO | |||||
姓名 | Hashimoto, Michiaki | |||||
著者所属 | ||||||
著者所属 | 地震研究所 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The effect of asymmetric insular shelf in trapping long gravity waves around an island is investigated numerically by using a simple model. The model consists of a steep-sided, circular island which rises from the top of a circular sill of larger radius. The center of the island is placed off-center of the sill by Δr distance. The results are : (1) As the asymmetry becomes pronounced, the region of higher amplitude response shifts to the direction of the broader shelf. (2) The transfer function in the case of an asymmetric island can be estimated roughly by using the solution of a symmetric island model whose width of the round shelf coincides with the broadest width of the shelf in the asymmetric model. In water level observations at four stations around Oshima Island, a spectrum peak of period approximately 8 minutes could often be detected at the westernmost station. To understand this feature, numerical calculations were made both for the realistic Oshima-Island model (with actual bathymetry), and for the Island-Shelf model (which roughly approximated the topography of the Oshima Island area). And it was found that the oscillations of the observed peak period of 8 min. corresponded to a (1, 0) mode of edge wave. This mode is modified by the asymmetry of the insular shelf and forms a standing wave pattern with a node extending in the southwesterly direction vis-a-vis Oshima Island. | |||||
書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 61, 号 1, p. 67-95, 発行日 1986-08-04 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00408972 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162258 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
日本十進分類法 | ||||||
主題 | 453 | |||||
主題Scheme | NDC | |||||
出版者 | ||||||
出版者 | 東京大学地震研究所 | |||||
出版者別名 | ||||||
Earthquake Research Institute, University of Tokyo |