Abstract: A mechanism for the breakdown of vertically propagating edge waves in a Boussinesq fluid is investigated within the context of the destruction of the polar stratospheric vortex. Under inviscid, quasi-linear, and slowly ...

Abstract: Monthly variability of atmosphere-ocean interactions in the midlatitude North Atlantic during the winter months (November?April) is examined. Composite and singular value decomposition (SVD) analyses are applied to the ...

Abstract: The stability of free and forced planetary waves in a ? plane channel is investigated with a barotropic model. The equilibrium flows that are considered have the gravest possible scale in the meridional direction and a ...

Abstract: In concert with a poleward shift in baroclinicity, the synoptic environment south of 40°S appears to have changed significantly over recent decades. South of 40°S and north of the Antarctic Ocean the number of cyclones has ...

Abstract: Changes in the naturally occurring modes of extratropical annual mean and zonal mean zonal wind variability are investigated using National Centers for Environmental Prediction?National Center for Atmospheric Research ...

Abstract: The three-dimensional structure and propagation characteristics of African easterly waves for the 1986?94 period are studied with June?August European Centre for Medium-Range Weather Forecasts (ECMWF) operational analyses, ...

Abstract: t has been suggested that the increase of Southern Hemisphere sea ice extent since the 1970s can be explained by ozone depletion in the Southern Hemisphere stratosphere. In a previous study, the authors have shown that in ...

Abstract: A stationary Rossby wave, sinusoidal in longitude, is slowly switched on, and the meridional propagation of the resulting wave front through a shear flow is examined. Initially the flow is westerly everywhere and therefore ...

Abstract: This study considers the relation of the annular mode to the kinematics of a fluctuating jet in zonal-mean zonal wind and to the zonal index, using an idealized model of fluctuations in the eddy-driven jet. When the ...

Abstract: Dipolar structures arise as empirical orthogonal functions (EOFs) of extratropical tropospheric zonal-mean zonal wind in observations, in idealized dynamical models, and in complex general circulation models. This study ...