A January and July climatology of the southern hemisphere based on daily numerical analyses 1973-1977

A limited climatology has been developed using the unique data set afforded by five years (1973-77) of World Meteorological Centre (WMC) Melbourne’s operational hemispheric analyses. The climatology differs from Taljaard et al. (1969) in respect of an upper-tropospheric ridge over the western Pacific at lower latitudes. Other differences appear in the lower levels over Antarctica and certain ocean areas. Distributions of cyclones and anticyclones, which to date have largely been based on studies performed during the International Geophysical Year (IGY) (1957-58), have been re-calculated.