Cyclogenesis is the atmospheric process leading to the development or intensification of a cyclonic circulation, typically associated with low-pressure systems. It involves the conversion of available potential energy into kinetic energy through baroclinic instability, driven by horizontal temperature gradients and vertical wind shear. Key dynamical mechanisms include upper-level potential vorticity anomalies, differential vorticity advection, and low-level temperature advection that promote surface pressure falls. Cyclogenesis often occurs along baroclinic zones such as frontal boundaries and jet streak exit or entrance regions, where ageostrophic circulations enhance ascent, cloud formation, and precipitation, thereby reinforcing the cyclonic vortex.
Severe Tropical Cyclone Narelle continues to amaze us with its long journey across northern Australia. This cyclone began life near the Solomon Islands on March 16, when moist air rose rapidly and created a low-pressure zone.
Earth Sciences
Mar 27, 2026
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Tropical Cyclone Narelle is currently a very dangerous Category 5 storm, sitting off the Far North Queensland Coast some 350 kilometers northeast of Cooktown. Formed in the Coral Sea, Narelle is packing a punch, with sustained ...
Environment
Mar 19, 2026
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Aerosols could hold the key to stopping potentially destructive cyclones in their tracks, according to a first-of-its-kind study from The Australian National University (ANU).
Earth Sciences
Jun 13, 2025
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The butterfly effect suggests that small changes in a system can have a large impact on eventual outcomes. One metaphor used to illustrate this concept is a butterfly flapping its wings only to cause a hurricane across the ...
Earth Sciences
May 28, 2025
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Extratropical cyclones (or low-pressure systems) traveling along the Kuroshio in East Asia most frequently occur in spring, bringing heavy rain and snowfall in the region. Researchers at the University of Tsukuba unveiled ...
Earth Sciences
Apr 17, 2025
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