Abstract: Graphical analyses of the observed occurrences of tropical cyclones in the North Atlantic region during the years 1901 through 1960 are presented. Intra-seasonal and inter-seasonal variations of tropical cyclone origins, ...

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 ...