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RISNonlinear Wave-Activity Conservation Laws and Hamiltonian Structure for the Two-Dimensional Anelastic Equations
Publisher: American Meteorological Society
Abstract: Exact, finite-amplitude, local wave-activity conservation laws are derived for disturbances to steady flows in the context of the two-dimensional anelastic equations. The conservation laws are expressed entirely in terms ...
Large-Scale Two-Dimensional Turbulence in the Atmosphere
Publisher: American Meteorological Society
Abstract: Global FGGE data are used to investigate several aspects of large-scale turbulence in the atmosphere. The approach follows that for two-dimensional, nondivergent turbulent flows which are homogeneous and isotropic on the ...
Application of the Direct Liapunov Method to the Problem of Symmetric Stability in the Atmosphere
Publisher: American Meteorological Society
Abstract: The problem of symmetric stability is examined within the context of the direct Liapunov method. The sufficient conditions for stability derived by Fj?rtoft are shown to imply finite-amplitude, normed stability. This ...
Free Gravity Waves and Balanced Dynamics
Publisher: American Meteorological Society
Abstract: It is shown how a renormalization technique, which is a variant of classical Krylov?Bogolyubov?Mitropol'skii averaging, can be used to obtain slow evolution equations for the vortical and inertia?gravity wave components ...
Sensitivity of the Brewer–Dobson Circulation and Polar Vortex Variability to Parameterized Nonorographic Gravity Wave Drag in a High-Resolution Atmospheric Model
Publisher: American Meteorological Society
Abstract: AbstractThe role of parameterized nonorographic gravity wave drag (NOGWD) and its seasonal interaction with the resolved wave drag in the stratosphere has been extensively studied in low-resolution (coarser than 1.9° ? ...
On the “Downward Control” of Extratropical Diabatic Circulations by Eddy-Induced Mean Zonal Forces
Publisher: American Meteorological Society
Abstract: The situation considered is that of a zonally symmetric model of the middle atmosphere subject to a given quasi-steady zonal force F?, conceived to be the result of irreversible angular momentum transfer due to the upward ...
Response of the Middle Atmosphere to CO2 Doubling: Results from the Canadian Middle Atmosphere Model
Publisher: American Meteorological Society
Abstract: The Canadian Middle Atmosphere Model (CMAM) has been used to examine the middle atmosphere response to CO2 doubling. The radiative-photochemical response induced by doubling CO2 alone and the response produced by changes ...
A Strategy for Process-Oriented Validation of Coupled Chemistry–Climate Models
Publisher: American Meteorological Society
Abstract: Accurate and reliable predictions and an understanding of future changes in the stratosphere are major aspects of the subject of climate change. Simulating the interaction between chemistry and climate is of particular ...
Chemistry–Climate Model Simulations of Twenty-First Century Stratospheric Climate and Circulation Changes
Publisher: American Meteorological Society
Abstract: The response of stratospheric climate and circulation to increasing amounts of greenhouse gases (GHGs) and ozone recovery in the twenty-first century is analyzed in simulations of 11 chemistry?climate models using ...