Accession Number:

AD1107680

Title:

On the Large-Scale Dynamics of f-Plane Zonally Symmetric Circulations

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Indiana University Bloomington United States

Personal Author(s):

Report Date:

2019-01-02

Pagination or Media Count:

17.0

Abstract:

In this study, an f-plane dynamical model for incompressible flows is presented to examine the mechanisms underlying thestructure and stability of large-scale zonally symmetric circulations. Analyses based on the Principle of Exchange of Stabilitiesreveal that this zonally symmetric model possesses a single-cell structure in the absence of the Coriolis force, similar to thesingle-cell general atmospheric circulation in the absence of the Earths rotation as previously hypothesized. The circulation,however, bifurcates into a triple-cell structure in the presence of the Coriolis force if the vertical temperature gradient, therotational rate, and the momentum eddy coefficients satisfy a certain constraint. Further analyses of this triple-cell structure asa result of the Coriolis force show that this structure is topologically stable, thus offering new insight into the highly resilientstructure of the Earths atmospheric global circulations.

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE