Generalized Stability of Nongeostrophic Baroclinic Shear Flow. Part I: Large Richardson Number Regime
نویسندگان
چکیده
منابع مشابه
Generalized Stability of Nongeostrophic Baroclinic Shear Flow. Part I: Large Richardson Number Regime
A generalized stability theory (GST) analysis of baroclinic shear flow is performed using primitive equations (PEs), and typical synoptic-scale midlatitudinal values of vertical shear and stratification. GST is a comprehensive linear stability theory that subsumes modal stability theory and extends it to account for nonmodal interactions such as may occur among the approximately geostrophically...
متن کاملGeneralized Stability of Nongeostrophic Baroclinic Shear Flow. Part II: Intermediate Richardson Number Regime
This work continues the generalized stability theory (GST) analysis of baroclinic shear flow in the primitive equations (PE), focusing on the regime in which the mean baroclinic shear and the stratification are of the same order. The Eady model basic state is used and solutions obtained using the PE are compared to quasigeostrophic (QG) solutions. Similar optimal growth is obtained in the PE an...
متن کاملInstability Associated Baroclinic Critical Layers in Rotating Stratified Shear Flow
The notion of over-reflection has been used to rationalize the linear instability of shear flows that are directed and sheared in a horizontal plane but stratified and subject to rotation in the vertical. In the linear stability analysis of these types of flows, two types of critical levels may appear that translate to singular points in the corresponding differential eigenvalue problem. The fi...
متن کاملEvolution of a stratified rotating shear layer with horizontal shear. Part I. Linear stability
Linear stability analysis is used to investigate instability mechanisms for a horizontally oriented hyperbolic tangent mixing layer with uniform stable stratification and coordinate system rotation about the vertical axis. The important parameters governing inviscid dynamics are maximum shear S, buoyancy frequency N, angular velocity of rotation Ω and characteristic shear thickness L. Growth ra...
متن کاملStability of Uniform Shear Flow
The stability of idealized shear flow at long wavelengths is studied in detail. A hydrodynamic analysis at the level of the Navier-Stokes equation for small shear rates is given to identify the origin and universality of an instability at any finite shear rate for sufficiently long wavelength perturbations. The
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Atmospheric Sciences
سال: 2003
ISSN: 0022-4928,1520-0469
DOI: 10.1175/1520-0469(2003)060<2083:gsonbs>2.0.co;2