简介：Thisstudyaimstoexploregenerationmechanismsoftheoceaninternalwaveusingthedynamicalanalysismethodsbasedonlineartheories.Historicalcruisemeasurementsandrecentsyntheticapertureradar(SAR)observationsofmesoscaleeddieswithdiameterofseveraltensofkilometerstohundredsofkilometersshowthattheinternalwavepacketswithwavelengthofhundredsofmeterstokilometerexistinsidethemesoscaleeddies.Thiscoexistencephenomenonandinherentlinksbetweenthetwodifferentscaleprocessesarerevealedinthesolutionsofgoverningequationsandboundaryconditionsfortheinternalwavedisturbancewithahorizontallyslowlyvariableamplitudeinacylindricalcoordinatesystem.Thetheoreticalsolutionsindicatethattheinstabilityofeddycurrentfieldprovidesthedynamicalmechanismtointernalwavegeneration.Thederiveddispersionrelationindicatesthattheinternalwavepropagationismodifiedbytheeddycurrentfieldstructure.Theenergyequationoftheinternalwavesclearlyshowstheinternalwaveenergyincrementcomesfromtheeddy.Thetheoreticalmodelsareusedtoexplaintheobservationofthemesoscaleeddy-inducedinternalwavesofftheNorwegiancoast.Thetwo-dimensionalwaveformsolutionoftheanticycloniceddy-inducedinternalwavepacketappearsasring-shapedcurves,whichcontainsthetypicalfeaturesofeddystreamlines.ThecomparisonoftheoreticalsolutionstothestructureoftheinternalwavepacketsonSARimageshowsagoodagreementonthemajorfeatures.
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