Abstract: Linear and nonlinear numerical channel models are used to simulate polar low/comma cloud evolution. The purpose of this study is to see how much realism can be obtained using models that do not include water vapor. The ...

Abstract: A primitive equation channel model is used to integrate an initial state consisting of a zonally independent unstable jet on which is superimposed a small-amplitude perturbation. The jet possesses both horizontal and ...

Abstract: Fine-resolution, dry, inviscid, Boussinesq formulations of a quasi-geostrophic model and a primitive equations model are used in a study of frontogenesis. These three-dimensional models employ horizontal and vertical ...

Abstract: A linear, quasi-geostrophic, channel model is used to study the instability of zonally independent jets on a midlatitude beta plane. The jets possess strong horizontal as well as vertical wind shear. The most unstable ...

Abstract: Century-long annual precipitation time series at 168 stations in the central United States are analyzed with special attention given to interdecadal variations. The results show statistically significant precipitation ...