2004年8月
How islands stir and fertilize the upper ocean
GEOPHYSICAL RESEARCH LETTERS
- ,
- ,
- ,
- 巻
- 31
- 号
- 16
- 開始ページ
- L16303
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1029/2004GL020143
- 出版者・発行元
- AMER GEOPHYSICAL UNION
Large differences between the upstream and lee side flow characteristics of an isolated island in the Kuroshio have been identified from a three-dimensional velocity survey and from vertical profiles of fine- and micro-structure. In the island wake, the relative vorticity is O(10f), the horizontal current divergence indicates upwelling of O(0.01 m s(-1)), and the rate of dissipation of kinetic energy is O( 10(-4) W kg(-1)). Isopycnal surfaces shoal by 60 m on the lee side and surface nitrate concentration increases seven-fold. Flow blockage by the island and the Izu-Ogasawara Ridge on its flanks, induces horizontal and vertical flow separation. The associated lateral and vertical shear drive the upwelling and the vertical mixing in the wake and produces a very pronounced "island mass effect.''
- リンク情報
- ID情報
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- DOI : 10.1029/2004GL020143
- ISSN : 0094-8276
- Web of Science ID : WOS:000223544100004