Parametric Subharmonic Instability of the Internal Tide at 29°N
Observational evidence is presented for transfer of energy from the internal tide to near-inertial motions near 29°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...
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| Veröffentlicht in: | Journal of physical oceanography 2013, Vol.43 (1), p.17-28 |
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| container_title | Journal of physical oceanography |
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| creator | MACKINNON, J. A ALFORD, M. H SUN, Oliver PINKEL, Rob ZHONGXIANG ZHAO KLYMAK, Jody |
| description | Observational evidence is presented for transfer of energy from the internal tide to near-inertial motions near 29°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°N, it does not do so catastrophically. |
| doi_str_mv | 10.1175/jpo-d-11-0108.1 |
| format | Article |
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A ; ALFORD, M. H ; SUN, Oliver ; PINKEL, Rob ; ZHONGXIANG ZHAO ; KLYMAK, Jody</creator><creatorcontrib>MACKINNON, J. A ; ALFORD, M. H ; SUN, Oliver ; PINKEL, Rob ; ZHONGXIANG ZHAO ; KLYMAK, Jody</creatorcontrib><description>Observational evidence is presented for transfer of energy from the internal tide to near-inertial motions near 29°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°N, it does not do so catastrophically.</description><identifier>ISSN: 0022-3670</identifier><identifier>EISSN: 1520-0485</identifier><identifier>DOI: 10.1175/jpo-d-11-0108.1</identifier><identifier>CODEN: JPYOBT</identifier><language>eng</language><publisher>Boston, MA: American Meteorological Society</publisher><subject>Dynamics of the ocean (upper and deep oceans) ; Earth, ocean, space ; Energy ; Energy transfer ; Exact sciences and technology ; External geophysics ; Frequency dependence ; Inertial waves ; Internal tides ; Photosystem I ; Physics of the oceans ; Propagation ; Propagation modes ; Seamounts ; Statistical analysis ; Studies ; Tides ; Time series ; Velocity ; Wave propagation</subject><ispartof>Journal of physical oceanography, 2013, Vol.43 (1), p.17-28</ispartof><rights>2015 INIST-CNRS</rights><rights>Copyright American Meteorological Society Jan 2013</rights><rights>Copyright American Meteorological Society 2013</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3491-84b5b0920d01b48a87fc2a898f15824f4b0e784dd88f82c3bb993073be0ebaa03</citedby><cites>FETCH-LOGICAL-c3491-84b5b0920d01b48a87fc2a898f15824f4b0e784dd88f82c3bb993073be0ebaa03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,3681,4024,27923,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27140392$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>MACKINNON, J. 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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°N, it does not do so catastrophically.</description><subject>Dynamics of the ocean (upper and deep oceans)</subject><subject>Earth, ocean, space</subject><subject>Energy</subject><subject>Energy transfer</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Frequency dependence</subject><subject>Inertial waves</subject><subject>Internal tides</subject><subject>Photosystem I</subject><subject>Physics of the oceans</subject><subject>Propagation</subject><subject>Propagation modes</subject><subject>Seamounts</subject><subject>Statistical analysis</subject><subject>Studies</subject><subject>Tides</subject><subject>Time series</subject><subject>Velocity</subject><subject>Wave propagation</subject><issn>0022-3670</issn><issn>1520-0485</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp9kM1OwzAQhC0EEqVw5hoJcXS7azuNfQOVv6KKVqKcLTux1VRpUuz00LfiGXgyElFx5LSj1Tej0RByjTBCzNLxZtfQgiJSQJAjPCEDTBlQEDI9JQMAxiifZHBOLmLcAMAEmRqQu6UJZuvaUObJ-96uTdg2dadndWyNLauyPSSNT9q1616tC7WpklVZuMS0CVPfX2-X5MybKrqr4x2Sj6fH1fSFzhfPs-n9nOZcKKRS2NSCYlAAWiGNzHzOjFTSYyqZ8MKCy6QoCim9ZDm3VikOGbcOnDUG-JDc_ObuQvO5d7HVm2bf14maZUpJUBzlfxRyzCaADLCjxr9UHpoYg_N6F8qtCQeNoPsx9etyoR86qfsxde-4PeaamJvKB1PnZfyzsQwFcMX4D4tKcpY</recordid><startdate>2013</startdate><enddate>2013</enddate><creator>MACKINNON, J. 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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°N, it does not do so catastrophically.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/jpo-d-11-0108.1</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
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| source | American Meteorological Society; EZB-FREE-00999 freely available EZB journals |
| subjects | Dynamics of the ocean (upper and deep oceans) Earth, ocean, space Energy Energy transfer Exact sciences and technology External geophysics Frequency dependence Inertial waves Internal tides Photosystem I Physics of the oceans Propagation Propagation modes Seamounts Statistical analysis Studies Tides Time series Velocity Wave propagation |
| title | Parametric Subharmonic Instability of the Internal Tide at 29°N |
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