The ocean contains specific zones with the largest vertical velocity shear.
Oceanographic observations and modeling confirm that the ocean contains distinct vertical zones, such as the layer immediately beneath the mixed layer and above the undercurrent core, characterized by the highest levels of vertical velocity shear and turbulent mixing.
The claim is specific and empirically testable regarding ocean dynamics. Papers [0] and [7] explicitly document specific zones in the ocean (the pycnocline/layer below the mixed layer and above the undercurrent core) that exhibit high vertical shear and mixing. Other papers discuss boundary layers and general turbulence but the supportive papers directly corroborate the existence of specific high-shear zones.
Hartmut Peters, Michael C. Gregg, Thomas B. Sanford. The diurnal cycle of the upper equatorial ocean: Turbulence, fine‐scale shear, and mean shear. 1994. https://doi.org/10.1029/93jc03506
Paper 0 demonstrates that the Pacific Equatorial Undercurrent features distinct zones of high vertical shear directly below the mixed layer and above the undercurrent core.
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Brandt P, Körner M, Moum JN, Roch M, Subramaniam A, Czeschel R, Krahmann G, Dengler M, Kiko R. Seasonal productivity of the equatorial Atlantic shaped by distinct wind-driven processes.. 2025. https://doi.org/10.1038/s41561-024-01609-9
Paper 7 notes that mixing intensity in the equatorial ocean is concentrated in the specific shear zone located just above the Equatorial Undercurrent core.
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