Shelf edge tide correlated eddies along the southeastern United States

摘要: [1] High frequency radar observations in the Southeastern United States have revealed sequences of small short-lived cyclonic eddies along shoreward edge Gulf Stream, that spin up as local tide turns alongshelf antiparallel to Stream. Eddies propagate equatorward shelf edge, sometimes progressing before dissipating one three hours later. They are distinctly different from Stream meander eddies, which poleward. In this article, and mooring data used establish important aspects these new eddies: they represent an instability process operating at a previously unidentified frequency, scale, cross-Stream position; contribute momentum fluxes, defining link between outer subtidal variability illustrating mechanism justify locally large horizontal eddy viscosity estimates; transport properties across importing nutrients onto transferring heat coastal ocean.