What question did this study set out to answer?

This research aims to examine how indices of surface circulation can indicate the persistence of a quasi-stationary trough south of Australia.

February 5, 2026

The use of indices in following the trend in surface synoptic patterns - in particular, as indicating the possibility of the persistence of a large quasi-stationary trough south of Australia

Key Points

This research aims to examine how indices of surface circulation can indicate the persistence of a quasi-stationary trough south of Australia.
The study plotted indices of westerly surface circulation as running five-day means.
Indices were analyzed at the 300 mb level over specific Australian areas.
Mean jet stream strength was utilized as an index for analysis.
Peak values of surface and jet stream indices coincided with the occurrence of large quasi-stationary troughs.
Findings suggest a correlation between indices and weather patterns impacting Australia.

Abstract

Indices of the westerly. surface circulation from 35-50°S and 40-175°E were plotted as running five day means, as allso that at the 300 mb level, over the Australian area from 115-165°E; for the latter, the mean strength of the jet stream was used as an index. Peak values of both indices were found to coincide with the occurrence of a large quasi stationary trough south of the Continent.

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Cite This Study

D. S. Wright (Sat,) studied this question.

synapsesocial.com/papers/69843543f1d9ada3c1fb3e16 https://doi.org/https://doi.org/10.1071/es58003

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