Vertical mixing and elements of mesoscale dynamics over North Carolina shelf and contiguous Gulf Stream waters

Results of microstructure measurements conducted in October–November of 2015 as a part of the Coupled Air Sea Processes and Electromagnetic Ducting Research (CASPER) project are discussed. The measurements were taken on the North Carolina shelf and across the Gulf Stream front. On the shelf, the oce...

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Bibliographic Details
Published in:Ocean dynamics 2017-06, Vol.67 (6), p.783-798
Main Authors: Lozovatsky, Iossif, Planella-Morato, Jesus, Shearman, Kipp, Wang, Qing, Fernando, Harindra Joseph S.
Format: Article
Language:English
Subjects:
23-27 May 2016
Advection
Aerodynamics
Atmospheric Sciences
Belgium
Continental slope
Density stratification
Diffusion coefficients
Diffusivity
Dissipation
Dynamics
Earth and Environmental Science
Earth Sciences
Eddy diffusion
Eddy diffusivity
Fluid- and Aerodynamics
Geophysics/Geodesy
Gulf Stream
Internal waves
Liège
Microstructure
Monitoring/Environmental Analysis
Ocean currents
Oceanic stratification
Oceanography
Parameterization
Rivers
Stratification
Surface salinity
Temperature (air-sea)
Topical Collection on the 48th International Liège Colloquium on Ocean Dynamics
Turbulence
Vertical mixing
Vortices
Wind
Winds
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Summary:Results of microstructure measurements conducted in October–November of 2015 as a part of the Coupled Air Sea Processes and Electromagnetic Ducting Research (CASPER) project are discussed. The measurements were taken on the North Carolina shelf and across the Gulf Stream front. On the shelf, the oceanic stratification was influenced by highly variable surface salinity and along-bottom advection. Vertical mixing was mostly governed by variable winds. The vertical eddy diffusivity was estimated using the VMP-based dissipation measurements, and the diffusivity values obtained during calm periods and stormy winds were compared. Parameterization of the diffusivity for various mesoscale dynamical conditions is discussed in terms of shear instabilities and internal wave-generated turbulence based on data obtained in deep waters of the Gulf Stream and on the continental slope.
ISSN:1616-7341
1616-7228
DOI:10.1007/s10236-017-1059-y