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Frictionally Controlled, Thermally Driven Circulations in a Circular Vortex with Application to Tropical Cyclones
Publisher: American Meteorological Society
Abstract: Based upon an argument by Charney and Eliassen, a tropical cyclone is envisaged as a combined system of a quasi-gradient circular vortex and a slow meridional circulation. The driving mechanism of this circulation is the ...
ON THE TRUNCATION ERROR WHICH ARISES FROM THE USE OF FINITE DIFFERENCES IN THE LAPLACIAN OPERATOR
Publisher: American Meteorological Society
Abstract: The modification of the power spectrum for the Laplacian of a variable, associated with the use of finite differences instead of derivatives, is discussed for an isotropic scalar field. The results permit one to specify a ...
ON THE ISOTROPY OF LARGE-SCALE DISTURRANCES IN THE UPPER TROPOSPHERE
Publisher: American Meteorological Society
Abstract: As a preliminary attempt to investigate the applicability of the turbulence theory to the large-scale atmospheric phenomena, the experimental test is made of the isotropy for the large-scale motion of the atmosphere at the ...
TEMPERATURE FLUCTUATIONS IN AN ISOTROPIC TURBULENT FLOW
Publisher: American Meteorological Society
Abstract: An attempt is made to see what the results of the application of the methods of Heisenberg are to isotropic temperature fluctuations in a stationary isotropic turbulence, under the restriction that temperature differences ...
Convection of Isolated Masses of a Buoyant Fluid: A Numerical Calculation
Publisher: American Meteorological Society
Abstract: The equations of motion for an incompressible fluid have been integrated numerically, as an initial value problem, for the axially-symmetric motion produced by release of an isolated lighter mass of the same fluid. The ...
A Numerical Study of Wavenumber Selection in Finite-Amplitude Rayleigh Convection
Publisher: American Meteorological Society
Abstract: Numerical integrations are performed for the equations governing two-dimensional convection flows in a fluid layer confined between two horizontal parallel plates and heated uniformly from below with free surface boundary ...
NUMERICAL SIMULATION OF THE LIFE CYCLE OF A THUNDERSTORM CELL
Publisher: American Meteorological Society
Abstract: A model of cumulus clouds is presented that combines the vertical equation of motion, the equation of mass continuity, the first law of thermodynamics, and the following cloud microphysical processes: condensation of water ...
The Pressure Perturbation and the Numerical Modeling of a Cloud
Publisher: American Meteorological Society
Abstract: The adaptation of the deep convection equations of Ogura and Phillips to moist convection results in an implicit relationship between temperature, potential temperature, pressure, and saturation vapor pressure. Typically, ...
Non-Stationary Finite-Amplitude Convection in a Thin Fluid Layer Bounded by a Stably Stratified Region
Publisher: American Meteorological Society
Abstract: Numerical integrations are performed for the equations governing two-dimensional convection flows in a fluid confined between two horizontal plates. A situation considered here is that local heating at a time-independent ...
A Comparison Between Axisymmetric and Slab-Symmetric Cumulus Cloud Models
Publisher: American Meteorological Society
Abstract: Axisymmetric and slab-symmetric cumulus cloud models with Kessler's parameterizations for microphysical processes are developed. By using a staggered grid arrangement and applying a modified upstream difference scheme, ...