My research focuses primarily on large scale, extratropical atmospheric dynamics. One facet of my work is the study of stratosphere-troposphere interaction. This examines the role of the stratosphere in influencing tropospheric climate and short-term surface variability (weather).
Another facet of this work is the study of annular (disk-like) modes. Recent work has shown that the atmosphere has preferred states that can be characterized as annular modes. Much of the intraseasonal variability seen in the stratosphere can be explained by examining just a few of these modes. A final facet of my work involves assessing the ability of global climate models to accurately and realistically simulate atmospheric annular modes and the physical mechanisms that produce them.