Search
Now showing items 1-10 of 41
Local Baroclinic Instability Induced by Inhomogeneous Stratification
Publisher: American Meteorological Society
Abstract: This analysis demonstrates with a linear balance model that a zonally inhomogeneous basic stratification (1 + σ) in the presence of only a horizontally homogeneous baroclinic shear could give rise to local baroclinic ...
Dissipative Structure of a Nonlinear Baroclinic System: Effect of Asymmetric Friction
Publisher: American Meteorological Society
Abstract: It is shown that a vertical asymmetry in the friction qualitatively influences the equilibration of nonlinear quasi-geostrophic unstable baroclinic waves. Specifically, the sense of this asymmetry is a crucial factor that ...
Does an Unstable Baroclinic Wave Equilibrate/Decay Baroclinically or Barotropically?
Publisher: American Meteorological Society
Abstract: It is shown using a quasigeostrophic multilevel channel model that the stabilization of a zonal baroclinic flow by an unstable wave would be essentially baroclinic if the meridional domain is narrow. In contrast, an unstable ...
Influence of Surface Sensible Heat Flux on Incipient Marine Cyclogenesis
Publisher: American Meteorological Society
Abstract: Incipient marine cyclogenesis is investigated as an instability process of a mean baroclinic state with a vertically nonuniform static stability under the influence of a self-induced surface sensible heat flux in the context ...
Wave-Packet Resonance: Instability of a Localized Barotropic Jet
Publisher: American Meteorological Society
Abstract: A better physical understanding of the instability of a zonally varying basic flow may be gained by invoking the concept of wave-packet resonance, which complements the notions of absolute and convective instability. To ...
Orthogonal Wavelet Analysis: Interannual Variability in the Sea Surface Temperature
Publisher: American Meteorological Society
Abstract: The unique capability of orthogonal wavelets, which have attractive time-frequency localization properties as exemplified by the Meyer wavelet, is demonstrated in a diagnosis of the interannual variability using a 44-year ...
Nonhydrostatic Barotropic Instability: Applicability to Nonsupercell Tornadogenesis
Publisher: American Meteorological Society
Abstract: This paper reports a barotropic instability analysis of nonhydrostatic columnar disturbances in a layer of homogeneous fluid over a flat bottom surface. The extended form of Hamilton's principle of least action is used to ...
On Moist Quasi-Geostrophic Barotropic Instability
Publisher: American Meteorological Society
Abstract: The instability of quasi-geostrophic internal modes in a moist model atmosphere with the presence of a purely barotropic basic flow is investigated. The author's formulation for a self-induced condensational heating (Mak) ...
Equilibration in Nonlinear Baroclinic Instability
Publisher: American Meteorological Society
Abstract: The influences of wave-wave and wave-zonal flow interactions an the baroclinic instability in a basic quasi-geostrophic two-layer model are investigated. A minimum spectral resolution is used. The evolution of the system ...
CSV
RIS