Tropical cyclones

Topics: Tropical cyclone, Cyclone, Extratropical cyclone Pages: 6 (1452 words) Published: August 29, 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 awful fear, the recently shaped Cyclone began gradually moving in a southwesterly course, passing near Bathurst Island on the 23rd and 24th December and turned pointedly east-southwestward, hitting Darwin with an estimated 240 km/h on Christmas Eve.

The Social, Economic and Environmental Impacts of Cyclone Tracy The entire fabric of life in Darwin was shattered, socially, economically and environmentally because of the category 4 cyclone that hit Darwin. Cyclone Tracy had a wind speed of 200 km/h that journeyed its way through Darwin for six hours, destroying lives and buildings. Social Impact

The effects of Cyclone Tracy were profound because it caused great devastation to 43500 residents living in Darwin. Many buildings were not to withstand cyclone forces, so approximately three-quarters of the population were left homeless, since 9000 homes were destroyed. 50 citizens died during the furious cyclone and 112 individuals were severely injured from flying debris and being crushed in their homes or cars. A further 16 people aboard the 22 vessels were lost at sea. Many citizens were unemployed after the cyclone and had to leave Darwin permanently. Studies show that residents who stayed in the city suffered less, in terms of physical and mental health whilst those who evacuated and never returned, suffered the most. Studies also show that residents who stayed or returned had a positive approach to Darwin’s future, but those who didn’t return complained about their alienation from society. Economic Impacts

Not only Cyclone Tracy destroyed Darwin, it shattered the lives of people living in that location, including their families and personal belongings. Masses had to depart the city, which meant they suffered the loss of everything they had ever experienced. Many of the residents went through a lot of grief having to lose all those things and some people never returned back to Darwin. Tracy destroyed more than 70 percent of Darwin’s structures, including...

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