Abstract: In an endeavor to determine the horizontal wind structure of jet streams, a series of aircraft traverses at 30,000 feet pressure-altitude was undertaken during the winter of 1952?1953. This article outlines the results of ...

Abstract: Mean geostrophic west-wind profiles are presented from seven years of 500-mb data. A method is out-lined for analyzing these profiles objectively. The appearance and significance of index cycles shown on this objective ...