論文

査読有り
2022年2月19日

Interannual Bottom-Intensified Current Thickening Observed on the Continental Slope Off the Southeastern Coast of Hokkaido, Japan

Fluids
  • Akira Nagano
  • ,
  • Takuya Hasegawa
  • ,
  • Keisuke Ariyoshi
  • ,
  • Hiroyuki Matsumoto

7
2
開始ページ
84
終了ページ
84
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3390/fluids7020084
出版者・発行元
MDPI AG

By rotary empirical orthogonal function and coastal-trapped wave mode analyses, we analyzed current velocity data, collected from 2001 to 2016. The data were obtained by an acoustic Doppler current profiler, deployed upward at a location of 41°39.909′ N, 144°20.695′ E, on a 2630-m deep continental slope seabed off the southeastern coast of Hokkaido, Japan. The results indicate that the current intensifies toward the bottom and is directed nearly toward the shore, reaching an average speed of ~2.5 cm s−1 just above the bottom. The thickness of the along-slope northward component of the bottom-intensified current varied within the range of 50–350 m. We found that the current thickness change was caused by oceanic barotropic disturbances, produced by the intensification of the Aleutian Low, largely related to the El Niño–Southern Oscillation and modified through the excitation of bottom-trapped modes of coastal-trapped waves. This finding improves the prediction accuracy of the the bottom-intensified current change, being beneficial for suspended sediment studies, construction and maintenance of marine structures, planning of deep drilling, and so on.

リンク情報
DOI
https://doi.org/10.3390/fluids7020084
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000778940800001&DestApp=WOS_CPL
共同研究・競争的資金等の研究課題
無人船舶広域海洋観測を活用した海溝型巨大地震モニタリングの日米共同開発
URL
https://www.mdpi.com/2311-5521/7/2/84/pdf
ID情報
  • DOI : 10.3390/fluids7020084
  • eISSN : 2311-5521
  • ORCIDのPut Code : 108572398
  • Web of Science ID : WOS:000778940800001

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