On the Importance of Weak Steady Shear in the Refraction of Short Internal Waves
Ray theory is used to study the refraction of short oceanic internal waves by a spectrum of large amplitude inertia waves superimposed on a weakly sheared steady current. The results suggest that the steady current has a significant cumulative effect on short-wave propagation over the timescale of a...
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| creator | Buckley, Greg Broutman, Dave Rottman, James W Eckermann, Stephen |
| description | Ray theory is used to study the refraction of short oceanic internal waves by a spectrum of large amplitude inertia waves superimposed on a weakly sheared steady current. The results suggest that the steady current has a significant cumulative effect on short-wave propagation over the timescale of a few inertia periods. The strength of ray convergence is also computed, as this affects short-wave amplitudes. Typically we find weak ray convergence and much slower growth toward instability with increasing vertical wavenumber than in a steady-shear critical-layer model.
Published in Geophysical Research Letters, v26 n18 p2877-2880, 15 Sep 1999. |
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Published in Geophysical Research Letters, v26 n18 p2877-2880, 15 Sep 1999.</description><subject>BUOYANCY</subject><subject>CONVERGENCE</subject><subject>GEOSTROPHIC CURRENTS</subject><subject>INERTIA</subject><subject>INTERNAL WAVES</subject><subject>OCEAN WAVES</subject><subject>Optics</subject><subject>Physical and Dynamic Oceanography</subject><subject>RAY CONVERGENCE</subject><subject>RAY THEORY</subject><subject>REFRACTION</subject><subject>REPRINTS</subject><subject>SECONDARY WAVES</subject><subject>STEADY CURRENTS</subject><subject>STEADY SHEAR</subject><subject>WAVE PROPAGATION</subject><subject>WAVENUMBERS</subject><fulltext>true</fulltext><rsrctype>report</rsrctype><creationdate>1999</creationdate><recordtype>report</recordtype><sourceid>1RU</sourceid><recordid>eNrjZAjwz1MoyUhV8MwtyC8qScxLTlXIT1MIT03MVgguSU1MqVQIzkhNLFLIhCgLSk0rSkwuyczPAykLzgDqUfDMK0ktykvMUQhPLEst5mFgTUvMKU7lhdLcDDJuriHOHropJZnJ8cUlmXmpJfGOLo6mxgYmlobGBKQBw9QzFg</recordid><startdate>19990915</startdate><enddate>19990915</enddate><creator>Buckley, Greg</creator><creator>Broutman, Dave</creator><creator>Rottman, James W</creator><creator>Eckermann, Stephen</creator><scope>1RU</scope><scope>BHM</scope></search><sort><creationdate>19990915</creationdate><title>On the Importance of Weak Steady Shear in the Refraction of Short Internal Waves</title><author>Buckley, Greg ; Broutman, Dave ; Rottman, James W ; Eckermann, Stephen</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-dtic_stinet_ADA5304913</frbrgroupid><rsrctype>reports</rsrctype><prefilter>reports</prefilter><language>eng</language><creationdate>1999</creationdate><topic>BUOYANCY</topic><topic>CONVERGENCE</topic><topic>GEOSTROPHIC CURRENTS</topic><topic>INERTIA</topic><topic>INTERNAL WAVES</topic><topic>OCEAN WAVES</topic><topic>Optics</topic><topic>Physical and Dynamic Oceanography</topic><topic>RAY CONVERGENCE</topic><topic>RAY THEORY</topic><topic>REFRACTION</topic><topic>REPRINTS</topic><topic>SECONDARY WAVES</topic><topic>STEADY CURRENTS</topic><topic>STEADY SHEAR</topic><topic>WAVE PROPAGATION</topic><topic>WAVENUMBERS</topic><toplevel>online_resources</toplevel><creatorcontrib>Buckley, Greg</creatorcontrib><creatorcontrib>Broutman, Dave</creatorcontrib><creatorcontrib>Rottman, James W</creatorcontrib><creatorcontrib>Eckermann, Stephen</creatorcontrib><creatorcontrib>NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH</creatorcontrib><collection>DTIC Technical Reports</collection><collection>DTIC STINET</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Buckley, Greg</au><au>Broutman, Dave</au><au>Rottman, James W</au><au>Eckermann, Stephen</au><aucorp>NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH</aucorp><format>book</format><genre>unknown</genre><ristype>RPRT</ristype><btitle>On the Importance of Weak Steady Shear in the Refraction of Short Internal Waves</btitle><date>1999-09-15</date><risdate>1999</risdate><abstract>Ray theory is used to study the refraction of short oceanic internal waves by a spectrum of large amplitude inertia waves superimposed on a weakly sheared steady current. The results suggest that the steady current has a significant cumulative effect on short-wave propagation over the timescale of a few inertia periods. The strength of ray convergence is also computed, as this affects short-wave amplitudes. Typically we find weak ray convergence and much slower growth toward instability with increasing vertical wavenumber than in a steady-shear critical-layer model.
Published in Geophysical Research Letters, v26 n18 p2877-2880, 15 Sep 1999.</abstract><oa>free_for_read</oa></addata></record> |
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| source | DTIC Technical Reports |
| subjects | BUOYANCY CONVERGENCE GEOSTROPHIC CURRENTS INERTIA INTERNAL WAVES OCEAN WAVES Optics Physical and Dynamic Oceanography RAY CONVERGENCE RAY THEORY REFRACTION REPRINTS SECONDARY WAVES STEADY CURRENTS STEADY SHEAR WAVE PROPAGATION WAVENUMBERS |
| title | On the Importance of Weak Steady Shear in the Refraction of Short Internal Waves |
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