What question did this study set out to answer?

To examine the relationship between geostrophic wind and pressure jumps in the Gulf of Carpentaria during October.

February 5, 2026

Geostrophic wind over Cape York Peninsula and pressure jumps around the Gulf of Carpentaria

Key Points

To examine the relationship between geostrophic wind and pressure jumps in the Gulf of Carpentaria during October.
Analyzed surface pressure data over six years (1978-1983) in October.
Calculated mean daily geostrophic wind and its components for Cape York Peninsula.
Examined barograms for pressure jumps at Normanton and Mornington Mission.
Derived correlations between geostrophic wind and pressure jump characteristics.
Geostrophic wind shows a measurable impact on the formation of pressure jumps.
Pressure jumps were common occurrences in October, often undetectable by standard barographs.
Identified marked nocturnal pressure jumps at both locations analyzed.

Abstract

Surface pressure data for six Octobers (1978-1983) are used to calculate mean daily geostrophic wind over Cape York Peninsula. Barograms for Normanton, 30 km inland from the southeast corner of the Gulf of Carpentaria, and Mornington Mission, in the Gulf, are examined for marked nocturnal or early morning pressure jumps for the same period. Mean and standard deviation of the components of geostrophic wind, time of arrival of pressure jumps and their amplitude, and correlations between these, have been derived. These show some effect of the geostruphic wind on the formation and behaviour of pressure jumps, which are shown to be a very common phenomenon in October, and by no means always detectable with standard barographs.

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