A summary of the broadscale tropical circulation from 70°E to 180°, for November 1995 to April 1996, is presented. Weak cool ENSO conditions persisted through the season, with an apparent enhancement of the upward branch of the Walker circulation over the Australasian region, compared to the long-term mean. Mean sea-level pressures were generally less than average over most of the tropical region during the period, and sea-surface temperatures were mostly warmer than climatology. Averaged over the season, the low-level cross-equatorial and westerly mon-soon flow was near average, as was the upper-level return flow. There was little evidence of any regular intraseasonal periodicity in the active tropical convection early in the season. However, from the end of January, there appeared to be greater regularity, with a period of about 30 days dominating. Tropical cyclone numbers were close to the long-term mean.
Cleland et al. (Sun,) studied this question.
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