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RISA Two-Step Adams–Bashforth–Moulton Split-Explicit Integrator for Compressible Atmospheric Models
Publisher: American Meteorological Society
Abstract: Split-explicit integration methods used for the compressible Navier?Stokes equations are now used in a wide variety of numerical models ranging from high-resolution local models to convection-permitting climate simulations. ...
Simulation and Analysis of Tornado Development and Decay within a Three-Dimensional Supercell Thunderstorm
Publisher: American Meteorological Society
Abstract: A three-dimensional numerical simulation using a two-way interactive nested grid is to study tornado-genesis within a supercell. During a 40-minute period, two tornadoes grow and decay within the storm's mesocyclone. The ...
The Influence of Topography and Lower-Tropospheric Winds on Dryline Morphology
Publisher: American Meteorological Society
Abstract: The effects of topography, wind shear, and zonal wind speed on dryline formation and evolution are investigated using a three-dimensional nonhydrostatic mesoscale model. Rather than conduct a case study a parameter study ...
Time-Splitting Methods for Elastic Models Using Forward Time Schemes
Publisher: American Meteorological Society
Abstract: Two time-splitting methods for integrating the elastic equations are presented. The methods are based on a third-order Runge?Kutta time scheme and the Crowley advection schemes. The schemes are combined with a forward?backward ...
Influences of the Local Environment on Supercell Cloud-to-Ground Lightning, Radar Characteristics, and Severe Weather on 2 June 1995
Publisher: American Meteorological Society
Abstract: Radar, cloud-to-ground (CG) lightning characteristics, and storm reports were documented for 20 long-lived supercell thunderstorms that occurred during a 6-h period in the west Texas Panhandle on 2?3 June 1995. These ...
The Influence of Midtropospheric Dryness on Supercell Morphology and Evolution
Publisher: American Meteorological Society
Abstract: This work studies the relationship between midtropospheric dryness and supercell thunderstorm morphology and evolution using a three-dimensional, nonhydrostatic cloud model. Environments that differ only in midtropospheric ...
On the Impact of Additive Noise in Storm-Scale EnKF Experiments
Publisher: American Meteorological Society
Abstract: torm-scale ensemble Kalman filter (EnKF) studies routinely use methods to accelerate the spinup of convective structures when assimilating convective-scale radar observations. This typically involves adding coherent ...
Additive Noise for Storm-Scale Ensemble Data Assimilation
Publisher: American Meteorological Society
Abstract: An ?additive noise? method for initializing ensemble forecasts of convective storms and maintaining ensemble spread during data assimilation is developed and tested for a simplified numerical cloud model (no radiation, ...
A Time-Splitting Scheme for the Elastic Equations Incorporating Second-Order Runge–Kutta Time Differencing
Publisher: American Meteorological Society
Abstract: A forward-in-time splitting method for integrating the elastic equations is presented. A second-order Runge?Kutta time integrator (RK2) for the large-time-step integration is combined with the forward?backward scheme in a ...
Progress toward the Application of a Localized Particle Filter for Numerical Weather Prediction
Publisher: American Meteorological Society
Abstract: AbstractA series of papers published recently by the first author introduce a nonlinear filter that operates effectively as a data assimilation method for large-scale geophysical applications. The method uses sequential ...