Abstract: The Lyapunov diffusivity is used to investigate local isentropic mixing events in the upper troposphere?lower stratosphere (UTLS) region. The diagnostic highlights the seasonal cycle of the longitudinally varying mixing ...

Abstract: A new diagnostic (the ?Lyapunov diffusivity?) is presented that has the ability to quantify isentropic mixing in diffusion units and detects local mixing events by describing latitude?longitude variability. It is a hybrid ...

Abstract: Meridional cross sections of effective diffusivity in the Southern Ocean are presented and discussed. The effective diffusivity, Keff, characterizes the rate at which mesoscale eddies stir properties on interior isopycnal ...

Abstract: The robustness of Nakamura?s effective diffusivity diagnostic for quantifying eddy diffusivities of tracers within a streamwise-average framework is carefully examined in an oceanographic context, and the limits of its ...

Abstract: A diagnostic framework is presented, based on the Nakamura effective diffusivity, to investigate the regional variation in eddy diffusivity. Comparison of three different diffusivity calculations enables the effects of ...

Abstract: Near-surface ?effective diffusivities? associated with geostrophic eddies in the Southern Ocean are estimated by numerically monitoring the lengthening of idealized tracer contours as they are strained by surface geostrophic ...

Abstract: oherent jets are ubiquitous features of the ocean?s circulation, and their characteristics, such as orientation and energetics, may be influenced by topography. In this study, the authors introduce a large-scale, topographic ...

Abstract: The modulation of air?sea heat fluxes by geostrophic eddies due to the stirring of temperature at the sea surface is discussed and quantified. It is argued that the damping of eddy temperature variance by such air?sea ...

Abstract: he use of a measure to diagnose submesoscale isopycnal diffusivity by determining the best match between observations of a tracer and simulations with varying small-scale diffusivities is tested. Specifically, the robustness ...

Abstract: he overturning circulation of the Southern Ocean has been investigated using eddying coupled ocean?sea ice models. The circulation is diagnosed in both density?latitude coordinates and in depth?density coordinates. ...