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J. J. Taljaard

Abstract

Charts showing the seasonal frequency distribution of anticyclones, cyclones and cyclogeneses (centers of cyclogenesis) in the Southern Hemisphere south of 15S during the International Geophysical Year are presented. Meridional profiles of the zonal frequencies of the systems are compared with corresponding profiles of sea level pressure and wind, 1000–500 mb thermal wind and 500-mb geostrophic wind. Examples of typical cyclone and anticyclone tracks and of the movement of systems during periods with anomalous circulation are given.

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J. J. Taljaard and H. van Loon

Attention is drawn to the IGY World Weather Map project of the United States Weather Bureau, the Federal German Weather Service and the South African Weather Bureau. Reference is made to the data and the procedures used for sea level analysis of the Southern Hemisphere maps. The procedure for obtaining 500-mb maps over the large areas of the Southern Ocean where no sounding stations existed is described, and the reliability of sea level and 500-mb maps is discussed.

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J. J. Taljaard and T. E. W. Schumann
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