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RISNonlinear Saturation of Baroclinic Instability. Part II: Continuously Stratified Fluid
Publisher: American Meteorological Society
Abstract: Rigorous upper bounds are derived that limit the finite-amplitude growth of arbitrary nonzonal disturbances to an unstable baroclinic zonal flow in a continuously stratified, quasi-geostrophic, semi-infinite fluid. Bounds ...
Nonlinear Saturation of Baroclinic Instability. Part I: The Two-Layer Model
Publisher: American Meteorological Society
Abstract: A rigorous bound is derived which limits the finite-amplitude growth of arbitrary nonzonal disturbances to an unstable baroclinic zonal flow within the context of the two-layer model. The bound is valid for conservative ...
Nonlinear Saturation of Baroclinic Instability. Part III: Bounds on the Energy
Publisher: American Meteorological Society
Abstract: Rigorous upper bounds are derived on the saturation amplitude of baroclinic instability in the two-layer model. The bounds apply to the eddy energy and are obtained by appealing to a finite amplitude conservation law for ...
A Spectral View of Nonlinear Fluxes and Stationary-Transient Interaction in the Atmosphere
Publisher: American Meteorological Society
Abstract: Nonlinear spectral transfers of kinetic energy and enstrophy, and stationary-transient interaction, are studied using global FGGE data for January 1979. It is found that the spectral transfers arise primarily from a ...
Time Development of Small Disturbances to Plane Couette Flow
Publisher: American Meteorological Society
Abstract: The question of linear sheared-disturbance evolution in constant-shear parallel flow is here reexamined with regard to the temporary-amplification phenomenon noted first by Orr in 1907. The results apply directly to Rossby ...
Probabilistic Causal Network Modeling of Southern Hemisphere Jet Subseasonal to Seasonal Predictability
Publisher: American Meteorological Society
Contributions of Climate Feedbacks to Changes in Atmospheric Circulation
Publisher: American Meteorological Society
Abstract: AbstractThe projected response of the atmospheric circulation to the radiative changes induced by CO2 forcing and climate feedbacks is currently uncertain. In this modeling study, the impact of CO2-induced climate feedbacks ...
Storylines of Atmospheric Circulation Change for European Regional Climate Impact Assessment
Publisher: American Meteorological Society
Abstract: AbstractThere is increasing interest in understanding the regional impacts of different global warming targets. However, several regional climate impacts depend on the atmospheric circulation, whose response to climate ...
Nonlinear Stability of Eady's Model
Publisher: American Meteorological Society
Abstract: A nonlinear stability theorem is established for Eady's model of baroclinic flow. In particular, the Eady basic state is shown to be nonlinearly stable (for arbitrary shear) provided (?z)/(?y) > 2(5)^1/2f/(πN),where ?z is ...
On Hamiltonian Balanced Dynamics and the Slowest Invariant Manifold
Publisher: American Meteorological Society
Abstract: The concept of a slowest invariant manifold is investigated for the five-component model of Lorenz under conservative dynamics. It is shown that Lorenz's model is a two-degree-of-freedom canonical Hamiltonian system, ...