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Breaking of unsteady lee waves generated by diurnal tides

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Title: Breaking of unsteady lee waves generated by diurnal tides
Authors: Nakamura, T. Browse this author
Isoda, Y. Browse this author →KAKEN DB
Mitsudera, H. Browse this author
Takagi, S. Browse this author
Nagasawa, M. Browse this author
Issue Date: 20-Feb-2010
Publisher: American Geophysical Union
Journal Title: Geophysical Research Letters
Volume: 37
Start Page: L04602
Publisher DOI: 10.1029/2009GL041456
Abstract: Diapycnal mixing caused through breaking of large-amplitude internal lee waves generated by sub-inertial diurnal tides, which are modulated with a 18.6-year period, is hypothesized to be fundamental to both the intermediate-layer ventilation and the bi-decadal oscillation around the North Pacific Ocean. The first observational evidence of such wave breaking is presented here. The breaking wave observed had ∼200 m height and ∼1 km width, and its associated diapycnal mixing was estimated to be ∼1.5 m2 s^[-1], with a temporal average ∼10^[4] times larger than typical values in the open oceans. Our estimate suggests that a similar mixing process occurs globally, particularly around the Pacific and Antarctic Oceans.
Rights: Copyright 2010 by the American Geophysical Union
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中村 知裕

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