Large ageostrophic currents in the abyssal layer southeast of Kyushu, Japan, by direct measurement of LADCP

Akira Nagano, Kaoru Ichikawa, Hiroshi Ichikawa, Yasushi Yoshikawa, Kiyoshi Murakami

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

With full-depth LADCP velocity data collected in a wide area southeast of Kyushu, Japan, large velocity currents, occasionally exceeding 15 cm s-1, were observed in a thick, 500-1,500 m, near-homogeneous density layer below approximately 3,000 m depth around the steep topographies. The currents were found not to flow along the topographic contours, and to be strongly ageostrophic. The directions of the bottom-layer currents are rather related with phase of the semi-diurnal tides, suggesting deeply intruded internal tides generated at the steep topographies.

Original languageEnglish
Pages (from-to)259-268
Number of pages10
JournalJournal of Oceanography
Volume69
Issue number2
DOIs
Publication statusPublished - Feb 11 2013

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topography
internal tide
semidiurnal tide
current velocity

All Science Journal Classification (ASJC) codes

  • Oceanography

Cite this

Large ageostrophic currents in the abyssal layer southeast of Kyushu, Japan, by direct measurement of LADCP. / Nagano, Akira; Ichikawa, Kaoru; Ichikawa, Hiroshi; Yoshikawa, Yasushi; Murakami, Kiyoshi.

In: Journal of Oceanography, Vol. 69, No. 2, 11.02.2013, p. 259-268.

Research output: Contribution to journalArticle

Nagano, Akira ; Ichikawa, Kaoru ; Ichikawa, Hiroshi ; Yoshikawa, Yasushi ; Murakami, Kiyoshi. / Large ageostrophic currents in the abyssal layer southeast of Kyushu, Japan, by direct measurement of LADCP. In: Journal of Oceanography. 2013 ; Vol. 69, No. 2. pp. 259-268.
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