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Vertical Kinetic Energy, Turbulence And Mixing In The Ocean

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Friday, 30 September 2016, 2:30

Friday, September 30, 2016. 2:30 PM. Vertical Kinetic Energy, Turbulence And Mixing In The Ocean. Andreas Thurnherr, Lamont Doherty Earth Observatory. Sponsored by Rutgers Department of Environmental Sciences. More information here.

Away from the boundaries, vertical motion in the ocean is dominated by high-frequency internal waves. A new method has been developed to extract full-depth profiles of vertical ocean velocity accurate to a few mm/s from data collected with Lowered Acoustic Doppler Profiler (LADCP) instrumentation. Based on several hundred joint profiles of LADCP and microstructure from a range of different latitudes and dynamical environments it is shown that there is a close relationship between vertical wavenumber spectra of vertical kinetic energy (VKE) and turbulence levels. In contrast to previous inferences based on an assumed Garrett-Munk model and vertical shear and strain measurements (Gregg-Henyey-Polzin scaling), the relationship between VKE and dissipation does not depend on latitude, density stratification, or frequency content of the internal wave field.  

Location  Rm 223, Environmental & Natural Resource Sciences Bldg. 14 College Farm Road, New Brunswick, New Jersey