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  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 61
  4. 1
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. 東京大学地震研究所彙報
  4. 61
  5. 1

The Effect of Asymmetric Insular Shelf in Trapping Long Gravity Waves around an Island

http://hdl.handle.net/2261/12959
714e455a-8db6-4068-ba37-ea36c14302a3
プレビュー
名前 / ファイル ライセンス Actions
ji0611002.pdf ji0611002.pdf (1.6 MB)
item type 紀要論文 / Departmental Bulletin Paper(1)
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
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
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

WEKO 128179

橋本, 道明

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著者別名
姓名
姓名 Hashimoto, Michiaki
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
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Scheme NDC
主題 453
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
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