Monthly anticyclonicity and cyclonicity in the Australasian region: averages for January, April, July and October

The geographical distribution across the Australasian region of 23-year averages of monthly anticyclonicity and cyclonicity as well as monthly anticyclone and cyclone immobility times for the months January, April, July and October for the years 1965-1987 are presented in the form of maps. Differences from monthly anticyclonicity and cyclonicity in the Australasian region, as presented by Karelsky (1961) for 15years (1946-1960), are discussed briefly. A comparison with an atmospheric climatology of the southern hemisphere on ten years of daily numerical analyses (1972-82) as presented by Le Marshall, Kelly and Karoly (1985) is presented and some synoptic-scale features of the climatology are discussed briefly.