2.5 Tropical Cyclones

1. Tropical cyclones are intense low- pressure systems that form over warm oceans.
2. Tropical cyclones form over the Northern areas of Australia. Between 5 degrees and 22 degrees North and South of the Equator.
3. they generally effect areas north of Perth along the coasts of Western Australia and the Northern Territory, most of the Queensland coastline and occasionally the far north coast of New South Wales.
4.  Six are likely to cross the coastline.
5. Typhoons, Hurricanes.
6. tropical cyclones develop in the tropical regions of the world. heat from the sun causes warm, moist air to rise into the atmosphere. As the air rises, a low pressure system forms and condensation occurs, which releases latent heat causing the air to rise further into the atmosphere. if the air pressure in the upper atmosphere is high, then the rising column of warm air will spiral outwards in the upper atmosphere and air will rush from the surface to replace it. forming a tropical cyclone.
7. the eye of a tropical cyclone is the central spiral which happens to be the calmest area of the cyclone.
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9. Once they travel over land or move beyond the tropics to cooler oceans they tend to dissipate or lose their energy as the supply of warm, moist air is no longer present.