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Lagrangian Studies of Lateral Mixing

Lee, Craig M

2017

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  • Título:
    Lagrangian Studies of Lateral Mixing
  • Autor: Lee, Craig M
  • Assuntos: dynamics ; eddies ; Fronts (Oceanography) ; internal waves ; LATMIX(Lateral Mixing Experiment) ; mixing ; oceans ; Physical and Dynamic Oceanography ; stirring ; submesoscale dynamics
  • Descrição: The Lateral Mixing Experiment (LATMIX) focused on mixing and stirring at the submesocales (100 m to 10 km) in the upper ocean. LATMIX1 targeted the Sargasso Sea, southeast of the Gulf Stream, aiming for a region with relatively weak mesoscale eddy activity and clear waters to focus on submesoscale stirring by internal wave shear dispersion and finescale vorticity anomalies. LATMIX2 targeted the wintertime Gulf Stream, where deep mixed layers, strong lateral density gradients (Gulf Stream north wall) and the high probability of encountering intense atmospheric forcing provided ideal conditions for observing the generation and evolution of submesoscale instabilities. A towed profiler was used to conduct synoptic, 4D surveys to resolve submesoscale variability. Results include finding that: (i)interactions between near inertial internal waves and symmetric instability enhance dissipation at submesocale fronts, (ii) vertical vorticity in the wintertime mixed layer south of the Gulf Stream exhibits statistics, including skew, that are consistent with existing numerical predictions and (iii) Nearly flat salinity gradient spectra observed in the Sargasso Sea (taken along isopycnal surfaces) can be explained by internal wave horizontal strain at low horizontal wavenumbers, but not for shorter-scale variability.
  • Data de criação/publicação: 2017
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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