Breaking of unsteady lee waves generated by diurnal tides
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 Oc...
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Online Access: | http://hdl.handle.net/2115/43790 https://doi.org/10.1029/2009GL041456 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/43790 2023-05-15T13:55:39+02:00 Breaking of unsteady lee waves generated by diurnal tides Nakamura, T. Isoda, Y. Mitsudera, H. Takagi, S. Nagasawa, M. http://hdl.handle.net/2115/43790 https://doi.org/10.1029/2009GL041456 eng eng American Geophysical Union http://hdl.handle.net/2115/43790 Geophysical Research Letters, 37: L04602 http://dx.doi.org/10.1029/2009GL041456 Copyright 2010 by the American Geophysical Union 452 article fthokunivhus https://doi.org/10.1029/2009GL041456 2022-11-18T01:01:59Z 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. Article in Journal/Newspaper Antarc* Antarctic Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Antarctic Pacific Geophysical Research Letters 37 4 |
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Open Polar |
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Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Nakamura, T. Isoda, Y. Mitsudera, H. Takagi, S. Nagasawa, M. Breaking of unsteady lee waves generated by diurnal tides |
topic_facet |
452 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Nakamura, T. Isoda, Y. Mitsudera, H. Takagi, S. Nagasawa, M. |
author_facet |
Nakamura, T. Isoda, Y. Mitsudera, H. Takagi, S. Nagasawa, M. |
author_sort |
Nakamura, T. |
title |
Breaking of unsteady lee waves generated by diurnal tides |
title_short |
Breaking of unsteady lee waves generated by diurnal tides |
title_full |
Breaking of unsteady lee waves generated by diurnal tides |
title_fullStr |
Breaking of unsteady lee waves generated by diurnal tides |
title_full_unstemmed |
Breaking of unsteady lee waves generated by diurnal tides |
title_sort |
breaking of unsteady lee waves generated by diurnal tides |
publisher |
American Geophysical Union |
url |
http://hdl.handle.net/2115/43790 https://doi.org/10.1029/2009GL041456 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://hdl.handle.net/2115/43790 Geophysical Research Letters, 37: L04602 http://dx.doi.org/10.1029/2009GL041456 |
op_rights |
Copyright 2010 by the American Geophysical Union |
op_doi |
https://doi.org/10.1029/2009GL041456 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
4 |
_version_ |
1766262439823802368 |