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The characteristics of spontaneous near-inertial wave generation from an anticyclonic mesoscale eddy

Journal of Oceanology and Limnology 2022年第2期40卷 413-427页

作者： Bo ZHAO Zhenhua XU Qun LI Wenjia MIN Yang WANG Baoshu YIN CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of SciencesQingdao 266071China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Engineering Laboratory for Marine Ranching Institute of OceanologyChinese Academy of SciencesQingdao 266071China Polar Research Institute of China Shanghai 200136China

The generation and propagation characteristics of near-inertial waves(NIWs)generated spontaneously from a quasi-geostrophic anticyclonic mesoscale eddy in a rotating and stratifi ed fl uid were investigated by three-dimensional numerical *** are generated over a long time interval as a forced response to balanced baroclinic mesoscale *** such eddies,NIW generation from balanced flow is an inevitable result as the evolution of ***,the baroclinicity of mesoscale eddies is an essential condition for this NIW generation *** spontaneously generated NIWs radiate horizontally toward the eddy center and propagate upward in vertical *** forcing of the NIWs moves downward along the eddy axis from the location of maximum temperature anomaly of the mesoscale *** moving speed of the forcing is independent on the balanced mesoscale eddies but is determined by the ratio of buoyancy to inertial *** the forcing reaches the bottom of the mesoscale eddy,the spontaneous NIW generation process *** intensity in this spontaneous generation process is strengthened with the increase of the Rossby and Froude *** research to gain a solid understanding of the role of the Rossby and Froude numbers is necessary for the parameterization of spontaneous NIW generation from quasi-geostrophic mesoscale eddies in general circulation model.

关键词： near-inertial waves(NIWs) anticyclonic mesoscale eddy spontaneous generation

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