What question did this study set out to answer?

To summarize the tropical circulation dynamics in the Australian and Asian regions from November 1992 to April 1993.

February 5, 2026

The tropical circulation in the Australian/Asian region -November 1992 to April 1993

Key Points

To summarize the tropical circulation dynamics in the Australian and Asian regions from November 1992 to April 1993.
Analysis of tropical circulation patterns from 70°E to the date-line.
Assessment of rainfall levels across central and eastern Australia.
Examination of wind patterns associated with the Asian northeast winter monsoon.
Observation of the intraseasonal oscillation movement across the Indian Ocean to the western Pacific.
Warm ENSO conditions persisted during the study period.
The Walker circulation shifted eastward toward the date-line.
Rainfall in central and eastern Australia was generally below average.
Weaker winds were observed over east China and the South China Sea.
Strong northeast trade winds extended into the western Pacific coinciding with specific oscillation events.

Abstract

A summary of the broadscale tropical circulation from 70°E to the date-line, for November 1992 to April 1993, is presented. Warm ENSO conditions persisted through the season, and there was an eastwards shift of the upward branch of the Walker circulation towards the date-line. Associated with this, rainfall across central and eastern parts of Australia was generally average to below average, and downmotion anomalies were evident over the southwest Pacific. The Asian north-east winter monsoon produced weaker than normal winds over east China and the South China Sea; however, the northeast trade winds extended strongly into the western Pacific during two periods. Each of these periods coincided with the east-ward movement of a broadscale intraseasonal oscillation from the Indian Ocean to the western Pacific.

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