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Small-Scale Gravity Waves generated by Hurricanes in the Upper Troposphere - Lower Stratosphere

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dc.contributor.advisorPagiatakis, Spiros D.
dc.contributor.advisorVergados, Panagiotis
dc.contributor.authorWang, Yuying
dc.date.accessioned2024-03-18T17:53:36Z
dc.date.available2024-03-18T17:53:36Z
dc.date.issued2024-03-16
dc.date.updated2024-03-16T10:55:06Z
dc.degree.disciplineEarth & Space Science
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractThis thesis presents a detailed study of the small-scale gravity waves in the upper troposphere-lower stratosphere region that are generated by hurricanes. The goal is to understand the spectral properties of the convectively generated gravity waves and their variations with respect to the hurricane intensity, using the high vertical resolution temperature measurements from the GPS-Radio Occultation (RO) and the fine horizontal resolution wind data from the ECMWF reanalysis dataset, with the application of the least squares spectral analysis and wavelet analysis. Our results show that the pure thermal forcing mechanism generates the primary waves at the surface level in an almost identical way, while the overshooting convection and the background wind filtering seem to weaken as the hurricane intensity drops. The obstacle effect appears to dominate in the lower stratosphere which further contributes to the wave field asymmetry. A two-layer convection model is considered to simulate the hurricane convection that innovatively connects the wave generation and dissipation mechanisms with the ambient background atmosphere.
dc.identifier.urihttps://hdl.handle.net/10315/41861
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectAtmospheric sciences
dc.subjectGeophysics
dc.subjectPhysics
dc.subject.keywordsGravity wave
dc.subject.keywordsConvection
dc.subject.keywordsHurricane
dc.subject.keywordsGPS-RO
dc.subject.keywordsRadio occultation
dc.subject.keywordsECMWF
dc.subject.keywordsERA5
dc.subject.keywordsBackground wind filtering
dc.subject.keywordsTwo-layer convection
dc.titleSmall-Scale Gravity Waves generated by Hurricanes in the Upper Troposphere - Lower Stratosphere
dc.typeElectronic Thesis or Dissertation

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