What question did this study set out to answer?

The research aims to analyze the geographical distribution of anticyclonicity and cyclonicity in the Australasian region over a 23-year period.

February 5, 2026

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

Key Points

The research aims to analyze the geographical distribution of anticyclonicity and cyclonicity in the Australasian region over a 23-year period.
Mapping average monthly anticyclonicity and cyclonicity for January, April, July, and October from 1965-1987.
Comparing findings with previous studies conducted between 1946-1960 and with numerical analyses from 1972-1982.
Discussing synoptic-scale features related to the climatology of the southern hemisphere.
Presentation of geographical maps detailing the distribution of monthly anticyclonicity and cyclonicity.
Observations of differences compared to earlier studies from 1946-1960.
Identification of notable synoptic-scale features affecting the climatology.

Abstract

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.

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