# Statistical State Dynamics of Weak Jets in Barotropic Beta-Plane Turbulence

@article{Bakas2017StatisticalSD, title={Statistical State Dynamics of Weak Jets in Barotropic Beta-Plane Turbulence}, author={Nikolaos A. Bakas and Navid C. Constantinou and Petros J. Ioannou}, journal={Journal of the Atmospheric Sciences}, year={2017} }

Zonal jets in a barotropic setup emerge out of homogeneous turbulence through a flow-forming instability of the homogeneous turbulent state (zonostrophic instability), which occurs as the turbulence intensity increases. This has been demonstrated using the statistical state dynamics (SSD) framework with a closure at second order. Furthermore, it was shown that for small supercriticality the flow-forming instability follows Ginzburg–Landau (G–L) dynamics. Here, the SSD framework is used to…

## 9 Citations

### Structure and Stability of Low Amplitude Jet Equilibria in Barotropic Turbulence

- Physics, Environmental Science
- 2017

Planetary turbulent flows are observed to self-organize into large scale structures such as zonal jets and coherent vortices. Recently, it was shown that a comprehensive understanding of the…

### Vertically Sheared Horizontal Flow-Forming Instability in Stratified Turbulence: Analytical Linear Stability Analysis of Statistical State Dynamics Equilibria

- Physics, Environmental ScienceJournal of the Atmospheric Sciences
- 2018

Vertically banded zonal jets are frequently observed in weakly or nonrotating stratified turbulence, with the quasi-biennial oscillation in the equatorial stratosphere and the ocean’s equatorial…

### Vertically Sheared Horizontal Flow-Forming Instability in Stratified Turbulence: Linear Stability Analysis using the Analytical Approach to Statistical State Dynamics

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Vertically banded zonal jets are frequently observed in weakly or non-rotating stratified turbulence, with the quasi-biennial oscillation in the equatorial stratosphere and the ocean's equatorial…

### A Geometric Interpretation of Zonostrophic Instability

- Physics, Environmental ScienceJournal of Physical Oceanography
- 2020

The zonostrophic instability that leads to the emergence of zonal jets in barotropic beta-plane turbulence is analyzed through a geometric decomposition of the eddy stress tensor. The stress tensor…

### Statistical state dynamics of vertically sheared horizontal flows in two-dimensional stratified turbulence

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Simulations of strongly stratified turbulence often exhibit coherent large-scale structures called vertically sheared horizontal flows (VSHFs). VSHFs emerge in both two-dimensional (2D) and…

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- Physics, Environmental Science
- 2018

This thesis investigates the dynamics of layered velocity and buoyancy structures in stably and unstably stratified flows. Geophysical examples of layers in stably stratified turbulence include the…

### Wave-kinetic approach to zonal-flow dynamics: Recent advances

- Physics, Environmental SciencePhysics of Plasmas
- 2021

The basic physics of drift-wave turbulence and zonal flows has long been studied within the framework of the wave-kinetic theory. Recently, this framework has been reexamined from first principles,…

### Advective structure functions in anisotropic two-dimensional turbulence

- Environmental ScienceJournal of Fluid Mechanics
- 2021

Abstract In inertial-range turbulence, structure functions can diagnose transfer or dissipation rates of energy and enstrophy, which are difficult to calculate directly in flows with complex geometry…

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