Access the full text.
Sign up today, get DeepDyve free for 14 days.
L. Illari, P. Malguzzi, A. Speranza (1981)
On breakdowns of the westerliesGeophysical and Astrophysical Fluid Dynamics, 17
D. Duffy (1978)
The Stability of a Nonlinear, Finite-Amplitude, Neutrally Stable Eady WaveJournal of the Atmospheric Sciences, 35
B. Hoskins (1975)
The Geostrophic Momentum Approximation and the Semi-Geostrophic Equations.Journal of the Atmospheric Sciences, 32
A. Speranza, A. Buzzi, A. Trevisan, P. Malguzzi (1985)
A Theory of Deep Cyclogenesis in the Lee of the Alps. Part I: Modifications of Baroclinic Instability by Localized TopographyJournal of the Atmospheric Sciences, 42
P. Huerre, P. Monkewitz (1990)
LOCAL AND GLOBAL INSTABILITIES IN SPATIALLY DEVELOPING FLOWSAnnual Review of Fluid Mechanics, 22
(1990)
Orographic cyclogenesis
D. Muraki, C. Snyder, R. Rotunno (1999)
The Next-Order Corrections to Quasigeostrophic TheoryJournal of the Atmospheric Sciences, 56
J. Mihaljan (1962)
The baroclinic instability of a
Chpas Snyder (1995)
Stability of Steady Fronts with Uniform Potential VorticityJournal of the Atmospheric Sciences, 52
M. Fantini, S. Davolio (2000)
Formulation of a Semi-Geostrophic Model of Frontal Interaction with Isolated OrographyMeteorology and Atmospheric Physics, 72
A. Joly, A. Thorpe (1990)
Frontal instability generated by tropospheric potential vorticity anomaliesQuarterly Journal of the Royal Meteorological Society, 116
P. Malguzzi, A. Trevisan, A. Speranza (1987)
Effects of Finite Height Topography on Nongeostrophic Baroclinic Instability: Implications to Theories of Lee CyclogenesisJournal of the Atmospheric Sciences, 44
E. Tosi, M. Fantini, A. Trevisan (1983)
Numerical Experiments on Orographic Cyclogenesis: Relationship Between the Development of the Lee Cyclone and the Basic Flow CharacteristicsMonthly Weather Review, 111
C. Snyder, A. Joly (1998)
Development of perturbations within growing baroclinic wavesQuarterly Journal of the Royal Meteorological Society, 124
A. Buzzi, A. Speranza (1986)
A Theory of Deep Cyclogenesis in the Lee of the Alps. Part II: Effects of Finite Topographic Slope and HeightJournal of the Atmospheric Sciences, 43
R. Pierrehumbert (1986)
Spatially amplifying modes of the Charney baroclinic-instability problemJournal of Fluid Mechanics, 170
A. Joly, A. Thorpe (1991)
The Stability of Time-Dependent Flows: An Application to Fronts in Developing Baroclinic WavesJournal of the Atmospheric Sciences, 48
L. Merkine (1977)
Convective and absolute instability of baroclinic eddiesGeophysical and Astrophysical Fluid Dynamics, 9
A quasigeostrophic Eady model is used to study the instability properties of finite-amplitude Eady waves and relate them to the disturbances generated by isolated bottom topography. It is found that when the amplitude of the primary wave is small the unstable perturbations are slightly deformed three-dimensional Eady modes, with growth rates and phase speed near the values obtained for the instability of the mean zonal state only. When the amplitude of the primary wave is large the most unstable modes are frontal waves, with growth rates increasing with the amplitude of the primary wave and locked in phase with it. The transition between the two regimes occurs for amplitudes of the primary wave around 10 mb. When a wave packet is generated by the interaction of a large-amplitude primary wave with orography, the character of the instability is absolute—that is, the local perturbation grows exponentially—while in the small amplitude, as well as in the zonal, case, the perturbation is advected downstream while growing, so that at any fixed spatial point only the base state remains as t → ∞.
Journal of the Atmospheric Sciences – American Meteorological Society
Published: Mar 13, 2000
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.