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2016 ; 472
(2189
): 20160117
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Submesoscale currents in the ocean
#MMPMID27279778
McWilliams JC
Proc Math Phys Eng Sci
2016[May]; 472
(2189
): 20160117
PMID27279778
show ga
This article is a perspective on the recently discovered realm of submesoscale
currents in the ocean. They are intermediate-scale flow structures in the form of
density fronts and filaments, topographic wakes and persistent coherent vortices
at the surface and throughout the interior. They are created from mesoscale
eddies and strong currents, and they provide a dynamical conduit for energy
transfer towards microscale dissipation and diapycnal mixing. Consideration is
given to their generation mechanisms, instabilities, life cycles, disruption of
approximately diagnostic force balance (e.g. geostrophy), turbulent cascades,
internal-wave interactions, and transport and dispersion of materials. At a
fundamental level, more questions remain than answers, implicating a programme
for further research.