My area of research is middle atmospheric dynamics, general circulation of atmosphere and stratosphere troposphere exchange. The study of the atmosphere is one of the oldest intellectual pursuits. The atmosphere cannot be ignored; it is our environment. Although our everyday experiences of the earth’s atmosphere are, in general, confined to those phenomena which occur in the lower few kilometers, it does in fact extend up to an altitude of several hundred kilometers. In order to understand the many and varied approximations and assumptions of small-scale features such as individual clouds, regional, global weather prediction or climate models, it is necessary to study the various wave motions which are present in the atmosphere. The identification and appreciation of the mechanisms of these waves will allow us to isolate or eliminate certain wave types and to better understand the viability and effectiveness of commonly made approximations such as assuming hydrostatic balance.