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RISA Method for Diagnosing the Sources of Infrasound in Convective Storm Simulations
Publisher: American Meteorological Society
Abstract: his paper presents a convenient method for diagnosing the sources of infrasound in a numerical simulation of a convective storm. The method is based on an exact acoustic wave equation for the perturbation Exner function ...
Response of a Simulated Hurricane to Misalignment Forcing Compared to the Predictions of a Simple Theory
Publisher: American Meteorological Society
Abstract: his paper compares the tilt dynamics of a mature tropical cyclone simulated with a conventional cloud model to reduced modeling results and theoretical predictions. The primary experiment involves a tropical cyclone of ...
Development and Nondevelopment of Binary Mesoscale Vortices into Tropical Cyclones in Idealized Numerical Experiments
Publisher: American Meteorological Society
Abstract: he evolution of two symmetric midlevel mesoscale vortices situated above a warm ocean is examined with a basic cloud-resolving model. Idealized numerical experiments provide insight into how the evolution may vary with the ...
A Brief Critique of a Theory Used to Interpret the Infrasound of Tornadic Thunderstorms
Publisher: American Meteorological Society
Abstract: t has been proposed that the 0.5?10-Hz infrasound emitted by a severe storm is primarily generated by the axisymmetric oscillations of a tornado. This interpretation is challenged by a critical review of its theoretical ...
The Spontaneous Imbalance of an Atmospheric Vortex at High Rossby Number
Publisher: American Meteorological Society
Abstract: This paper discusses recent progress toward understanding the instability of a monotonic vortex at high Rossby number, due to the radiation of spiral inertia?gravity (IG) waves. The outward-propagating IG waves are excited ...
Intensification Rates of Tropical Cyclone–Like Vortices in a Model with Downtilt Diabatic Forcing and Oceanic Surface Drag
Publisher: American Meteorological Society
Note on Analyzing Perturbation Growth in a Tropical Cyclone–Like Vortex Radiating Inertia–Gravity Waves
Publisher: American Meteorological Society
Abstract: method is outlined for quantitatively assessing the impact of inertia?gravity wave radiation on the multimechanistic instability modes of a columnar stratified vortex that resembles an intense tropical cyclone. The method ...
Generation of Infrasound by Evaporating Hydrometeors in a Cloud Model
Publisher: American Meteorological Society
Abstract: The dynamical core of the Regional Atmospheric Modeling System has been tailored to simulate the infrasound of vortex motions and diabatic cloud processes in a convective storm. Earlier studies have shown that the customized ...
Waves in a Cloudy Vortex
Publisher: American Meteorological Society
Abstract: This paper derives a system of equations that approximately govern small-amplitude perturbations in a nonprecipitating cloudy vortex. The cloud coverage can be partial or complete. The model is used to examine moist vortex ...
Conditions That Inhibit the Spontaneous Radiation of Spiral Inertia–Gravity Waves from an Intense Mesoscale Cyclone
Publisher: American Meteorological Society
Abstract: The spontaneous radiation of spiral inertia?gravity (IG) waves from monotonic cyclones is reexamined. Such radiation can occur most significantly in a parameter regime that includes strong supercell mesocyclones and ...