Interaction between an eddy and a zonal jet

Is the Atmospheric Zonal Index Driven by an Eddy Feedback?

The authors address the question of whether or not eddy feedback plays an important role in driving the anomalous relative angular momentum associated with the zonal index (ZI) in the atmosphere. For this purpose, composites of anomalous relative angular momentum and anomalous eddy angular momentum flux convergence (eddy forcing) are examined with National Centers for Environmental Prediction–N...

Large eddy simulation of a plane jet

Eddy–Zonal Flow Interactions and the Persistence of the Zonal Index

An idealized atmospheric general circulation model is used to investigate the factors controlling the time scale of intraseasonal (10–100 day) variability of the extratropical atmosphere. Persistence on these time scales is found in patterns of variability that characterize meridional vacillations of the extratropical jet. Depending on the degree of asymmetry in the model forcing, patterns take...

On the interaction of Jupiter’s Great Red Spot and zonal jet streams

Jupiter’s Great Red Spot (GRS) has been observed in sufficient detail that we can use it to determine properties of the jovian atmosphere that cannot otherwise be found. These properties include: the potential vorticity of the GRS and its neighboring zonal jet streams, the shear imposed on the GRS by the jet streams, and the vertical entropy gradient (i.e., Rossby deformation radius). We show t...

An Ink-Jet Printed Eddy Current Position Sensor

An eddy current sensor with an ink-jet printed flexible inductor has been designed and fabricated. The inductor has been designed by means of software developed in-house. It has been fabricated by ink-jet printing with silver ink on a flexible substrate. The inductor is a part of the oscillator circuit whose oscillating frequency is measured by a microcontroller. The sensor characteristics have...