Abstract: The reason for existence of two separate unstable modes, previously described by Gall for flows in vortex simulators, is explored. When the energy equation for an unstable disturbance is considered, it is clear that the ...

Abstract: A simple vertically-integrated axisymmetric model is used to Calculate axisymmetric flows for different swirl ratios(s) in tornado simulators. Thew axisymmetric states are then tested for stability using a primitive-equation ...

Abstract: A simple model of flow through a tornado vortex simulator is described. This model assumes a very simple distribution in the vertical of the radial and tangential components of the wind, consistent with the flow found in ...

Abstract: A rotating cylindrical annulus of an incompressible fluid with horizontal density gradients is studied by the use of numerical models. Steady axisymmetric states are calculated using the full Navier-Stokes equations for a ...

Abstract: Numerical models are utilized to study a spherical analogue of the rotating annulus experiments modeling atmospheric motion. Motivation for this work is partially provided by NASA's proposal to conduct such an experiment ...

Abstract: A spring-runoff forecast model for central Arizona was developed based on multiple discriminant analysis. More than 6500 potential predictor variables were analyzed, including local precipitation and temperature variables, ...

Abstract: The Arizona Monsoon Boundary is defined as the boundary separating two distinctly different air masses over Mexico and the adjacent Pacific during the summer. The structure and dynamics of this boundary are examined by ...

Abstract: Squall lines possessing nearly all the characteristics of tropical squall lines occasionally develop during the summer monsoon over southern Arizona and northwestern Mexico. Initial thunderstorm formation is over the ...

Abstract: Northward surges of relatively cool, moist, maritime air from the tropical Pacific into the southwestern United States occur via the Gulf of California every summer during the Mexican monsoon season. These surges advect ...

Abstract: The possibility of disturbances along the boundary between two air masses in the southwestern United States and northwestern Mexico during the summer is examined. This boundary is an approximately north-south confluent ...