|
Hokkaido University Collection of Scholarly and Academic Papers >
Institute of Low Temperature Science >
Peer-reviewed Journal Articles, etc >
Breaking of unsteady lee waves generated by diurnal tides
| 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 |
| URI: | http://hdl.handle.net/2115/43790 |
| 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
|
