Tropical cyclones

Topics: Tropical cyclone / Pages: 5 (1452 words) / Published: Aug 30th, 2014
Tropical Cyclones
Description of Tropical Cyclones
A tropical cyclone is a particular type of low pressure system that occurs in the summer months near northern Australia and composes over warm tropical waters. Cyclones can also be defined as gale force winds and heftily ponderous rain that can be highly destructive. Cyclones can cause the moving and reshaping of sand dunes, whilst also generating extensive erosion along the coast. They additionally create flooding, damage inland and landfall. Tropical cyclones have other names in other components in the world. In the Atlantic and eastern pacific, they are called hurricanes, whilst in Southeast Asia, they are kenned as typhoons. A tropical cyclone may exist for only a few days or as long as a few weeks, but it can behave unpredictably because it can move forward or hardly move at all, change direction and even doubling back on itself. Cyclones can only compose when the ocean waters are least 26°C. The continuous release of heat during the evaporation process combined with the Earth’s rotation causes the spinning effect on cyclones and propels it forward.
Cyclone Tracy
On 24th December 1974, a minute but excruciating cyclone passed directly over Darwin and hit just as the residents were preparing to relish themselves at Christmas. On 20th December 1974, a low pressure system was recorded 370 km North-East of Darwin over the Arafura Sea by Ray Wilkie and Geoff Crane using the ‘United States ' ESSA-8 environmental satellite. The satellite showed that the ‘eye’ of the cyclone was latitude 8° south and longitude 135° east. Cyclone Tracy was first thought to be a simple thunderstorm but intensified over the next two days and was pronounced as a cyclone. The storm was aggravated by corresponding with vigorous convective clouds, leading to the surface-warmth, humidity and unstable atmosphere at the Arafura Sea. Cyclone Tracy was heading to the north-northeast of Cape Don, however to everybody 's most noticeably



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