Abstract: his study explores the role of inertial instability in poleward momentum surges and ?flare ups? of the subpolar jet near midlatitude cyclones. Two cases are simulated with the University of Wisconsin Nonhydrostatic Modeling ...

Abstract: A mechanistic model of the middle atmosphere is used to study the interaction between Rossby waves forced at the extratropical tropopause and inertial instability in the equatorial lower mesosphere. The impact of ...

Abstract: Three global datasets are used to investigate climatological properties of the high pressure system commonly found in the boreal winter stratosphere over the Aleutian Islands. Based on a detailed examination of 10 years ...

Abstract: The influence of the stratospheric quasi-biennial oscillation (QBO) on the polar night jets (PNJs), subtropical easterly jets (SEJs), and associated Rossby wave breaking (RWB) is investigated using global meteorological ...

Abstract: Differential advection in Rossby waves can lead to potential vorticity (PV; P) contours on isentropic surfaces folding over in latitude (Py < 0) in a process called Rossby wave breaking (RWB). Exploring the properties of ...

Abstract: n simulations of midlatitude cyclones with the University of Wisconsin Nonhydrostatic Modeling System (UWNMS), mesoscale regions with large negative absolute vorticity commonly occur in the upper troposphere and lower ...

Abstract: Global analyses from the European Centre for Medium-Range Weather Forecasts (ECMWF) are used to analyze the sequence of events leading to the creation of a large-scale reversal of potential vorticity (PV) gradients across ...

Abstract: The distribution of day-night temperature differences in the middle atmosphere determined by the Nimbus 7 LIMS experiment is described. Day-night differences maximize at and are approximately symmetric about the equator. ...

Abstract: The evolution of the zonal mean state in the equatorial middle atmosphere is investigated with the use of daily mapped temperatures derived from the Limb Infrared Monitor of the Stratosphere (LIMS) experiment. These ...

Abstract: A composite of 16 strong East Asian polar outbreak occurrences, widely separated in time, reveals a clear sequence of events: beginning over the western North Atlantic six or seven days in advance of the key day (as defined ...