Parametric Subharmonic Instability of the Internal Tide at 29 degrees N
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2013 |
| Auteurs (6) | : | MACKINNON J,a ALFORD Matthew,h SUN O PINKEL R ZHAO Z,x KLYMAK Jody,m |
| Revue scientifique | : | Journal of Physical Oceanography |
| Volume | : | 43 |
| Fascicule | : | 1 |
| Pages | : | 17-28 |
| DOI | : | 10.1175/JPO-D-11-0108.1 |
| URL | : | - |
| Abstract | : | Observational evidence is presented for transfer of energy from the internal tide to near-inertial motions near 29 degrees N in the Pacific Ocean. The transfer is accomplished via parametric subharmonic instability (PSI), which involves interaction between a primary wave (the internal tide in this case) and two smaller-scale waves of nearly half the frequency. The internal tide at this location is a complex superposition of a low-mode waves propagating north from Hawaii and higher-mode waves generated at local seamounts, making application of PSI theory challenging. Nevertheless, a statistically significant phase locking is documented between the internal tide and upward-and downward-propagating near-inertial waves. The phase between those three waves is consistent with that expected from PSI theory. Calculated energy transfer rates from the tide to near-inertial motions are modest, consistent with local dissipation rate estimates. The conclusion is that while PSI does befall the tide near a critical latitude of 29 degrees N, it does not do so catastrophically. |
| Mots-clés | : | DEEP-OCEAN; ENERGY; FLUX; GENERATION; HAWAII; KAENA RIDGE; PACIFIC; PROPAGATION; WAVES |
| Commentaire | : | Times Cited in Web of Science Core Collection: 74 |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
MacKinnon JA, Alford MH, Sun O, Pinkel R, Zhao ZX, Klymak JM (2013) Parametric Subharmonic Instability of the Internal Tide at 29 degrees N. J Phys Oceanogr 43: 17-28 | doi: 10.1175/JPO-D-11-0108.1
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