Isopycnal Layer - an overview | ScienceDirect Topics
The isopycnal surfaces dip down in the center of the subtropical gyre at about 30° latitude. The formation of this gyre of light warm water is related to the climatological distribution of surface winds, which produce a convergence of Ekman transport towards the center of the gyre, and a downwelling of surface waters into the interior of the ...
Isopycnal mixing - ScienceDirect
Jan 1, 2022 · A common approach for inferring isopycnal mixing rates from ocean tracers is to use inverse methods to infer the combined effects of mean advection, diapycnal, and isopycnal mixing from hydrographic and/or other tracer distribution information, with various assumed dynamical constraints (e.g., Wunsch, 1987; Killworth, 1986; Zika et al., 2010 ...
Isopycnal and diapycnal mixing parameterization schemes for ...
Aug 1, 2022 · This work is based on isopycnal coordinates and obtains its corresponding expression in Cartesian coordinates through a series of coordinate transformations. Adding the Redi tensors to numerical models of Cartesian coordinates has been shown to produce a more realistic thermocline and reduce spurious diapycnal mixing ( Gough and Lin, 1995 ).
Diagnostics of isopycnal mixing in a circumpolar channel
Dec 1, 2013 · The isopycnal diffusivity differs from the buoyancy diffusivity, a.k.a. the Gent–McWilliams transfer coefficient, which is weaker and peaks near the surface and bottom. The second set of methods are observationally “practical” diagnostics.
Applications of generalized vertical coordinates in ocean …
Jul 1, 2022 · In fact, the isopycnal surface is a natural vertical coordinate system for studying ocean dynamics and has successfully been used in the Hybrid Coordinate Ocean Model (Halliwell et al., 1998), and Miami University Isopycnal Coordinate Ocean Model (Bleck and Boudra, 1981) for simulating large-scale circulations and sharp fronts.
Isopycnal and diapycnal mixing parameterization schemes for ...
Aug 1, 2022 · This work is based on isopycnal coordinates and obtains its corresponding expression in Cartesian coordinates through a series of coordinate transformations. Adding the Redi tensors to numerical models of Cartesian coordinates has been shown to produce a more realistic thermocline and reduce spurious diapycnal mixing (Gough and Lin, 1995).
Diapycnal and isopycnal mixing along the continental rise in the ...
Feb 1, 2023 · However, the small isopycnal diffusivities were plausible estimates given the recent recognition of the barrier effect by jets (Ferrari and Nikurashin, 2010), where a jet suppresses the diffusivity by barring stirring within the mean flow. We note that our estimated isopycnal diffusivity was estimated along the northern boundary of the box ...
A diagnosis of isopycnal mixing by mesoscale eddies
Jan 1, 2009 · While for the two-dimensionally zonal mean case a scalar isopycnal diffusivity is sufficient, for the three-dimensional case of temporal averaging an isopycnal diffusivity tensor with two independent components is needed to describe the mesoscale eddy effects, in analogy to what have been found by Eden et al. (2007b) for the thickness ...
Isopycnal displacements within the Cape Basin thermocline as …
Aug 1, 2006 · Results from a numerical, isopycnal ocean model (de Steur et al., 2004) show that heat and salt anomalies associated with Agulhas rings are entrained within the upper branch of the thermocline circulation as they cross the Cape Basin, with up to 40% of the trapped thermocline water mixed with the environment during the first few months of the ...
Ocean Mixing - ScienceDirect
In the Southern Ocean, along-isopycnal stirring by eddies connects the ocean surface with the mid-depth to deep interior. Interior mixing is largely adiabatic, but spatially heterogeneous in both vertical and horizontal directions, with eddy diffusivities estimated to vary by a factor of four or more, from roughly 700 to 2800 m 2 s −1 .