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Q2.) DO CYCLONES TRIGGER OTHER DISASTERS?

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Q2.) DO CYCLONES TRIGGER OTHER DISASTERS?

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Q5.) WHAT IS THE LIFE CYCLE OF A TROPICAL CYCLONE?

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Q5.) WHAT IS THE LIFE CYCLE OF A TROPICAL CYCLONE?

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The average size of a tropical cyclone is 170 kilometres wide. The size of a cyclone can be determined on the atmospheric and sea conditions at the time.  For a cyclone to form the ocean has to be over 26 degrees celsius so automatically when it moves onto land or colder oceans it will weaken rapidly this is because these are locations where their heat and/or moisture sources do not exist.

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Cyclones can move the plate tectonics and create friction which is linked to the development of earthquakes. Cyclones can also disturb volcanoes & can suddenly erupt.

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The centre area of a cyclone is called a 'eye'. The typical size of the eye is 40 km but can range from 10km to 100km. The eye is light winds surrounded by dense cloud known as the eye wall.

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Tropical cyclone season in Australia is from November to April although typically don't occur in November. More west of the Indian Ocean, cyclones can happen any time of the year.

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Cyclones usually develop over warm waters exceeding 26 degrees. The wind shear ( wind speed or direction) is low and there is a large amount  of atmospheric moisture which allows cloud growth.

The pressure lowers and wind increases.The convective clouds form into spirals and the eye develops.

Mature stage is reached and this is when the cyclone is at it's maximum size & strength.

When the energy supply is interrupted,  by moving over colder water or over land, it reaches the decaying stage.  The size and power reduces.

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What is the size of the typical hurricane/tropical cyclone? | OpenHazards.com

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Approximately 170 km (100 miles) wide. The size of the storm is determined by a balance of atmospheric forces, the two major ones being the Coriolis acceleration due to the rotation of the earth, and the low pressure region at the center of the storm.

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Australian region tropical cyclone warnings, forecasts, seasonal outlooks, cyclone history, climatology and related information

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An overview of the formation and characteristics of tropical cyclones.

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Scientists are attempting to find ways of stopping or slowing down these powerful storms. Some scientists such as billionaire Bill Gates believe that a process of using fleets of vessels to mix warm water from the surface of the ocean with colder water from deeper areas in effort to cool down the surface of the water to help prevent & control the cyclones.

Technology is also helping reduce damage that these disasters make. More developed countries have the resources that allow emergency services & scientists to monitor  and prepare for the occurrence and size of the storm.

Wind turbines are created by environmental engineers. Wind turbines are considered to provide a defence against cyclones, by slowing damaging winds.

Mathematics are used to measure the speed of the wind speed and gust, size that it takes up.

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As another active hurricane season in the Atlantic winds down, some atmospheric scientists say they have the tools to stop or slow the powerful storms. Their efforts, however, are hampered by a lack of funding and tricky legal issues.

Until recently, the U.S. Department of Homeland Security has been investigating whether seeding storm clouds with pollution-size aerosols (particles suspended in gas) might help slow tropical cyclones. Computer models suggest that deploying aerosols can have "an appreciable impact on tropical cyclone intensity," writes William Cotton, an atmospheric scientist at Colorado State University. He and his colleagues recently reviewed such work in the Journal of Weather Modification. In fact, human pollution may already be weakening storms, including August's Hurricane Irene. "[Computer] models all predicted that the intensity of Irene would be much greater than it was," Cotton notes. "Was that because they did not include aerosol effects?"

Other would-be storm stoppers, including Microsoft billionaire Bill Gates, have focused on feeding cold water to the hot storms to slow their momentum. The Gates-backed plan proposes using a fleet of wave-powered rafts to spread a slick of colder ocean water pumped up from the depths in the path of an onrushing storm. The trouble with that process is that it could prove unwieldy. It would require hundreds of devices, and because storms are so difficult to track, placing them would be a challenge. The proof of concept will soon get a test of sorts in Hawaii. The U.S. Navy plans to deploy a prototype device that extracts energy from the temperature difference between surface and deep-ocean water. The device will involve pumping cool water to the ocean surface, in much the same manner as would be required to stop a typhoon.

Would dispelling storms with cold water be a good idea? Tropical cyclones, for all their destructive force, are one of the planet's ways of redistributing heat from the tropics to the poles. Shutting that down might have unforeseen consequences, and shifting a storm's course could spawn punitive action from people in the new path, as a team of engineers, public policy experts and atmospheric scientists wrote in Environmental Science and Technology in April.

Regardless, for all their power, tropical cyclones are sensitive. To exploit that sensitivity, scientists would need accurate information on a storm's future course, says meteorologist Ross Hoffman of Atmospheric and Environmental Research. But the U.S. government is cutting funding for the satellites that make such tracking and prediction possible. For now flood maps and evacuation plans remain our best protection.

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As another active hurricane season in the Atlantic winds down, some atmospheric scientists say they have the tools to stop or slow the powerful storms. Their efforts, however, are hampered by a lack of funding and tricky legal issues. Until recently, the U.S.

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Our chosen natural disaster to present & model as a group is the tsunami. Tsunami's are wide,high sea waves caused by earthquakes or other environmental disturbances such as displacements in the sea floor, landslides or volcanic activity. Tsunamis typically happen around the edges of the 'Ring of Fire". Large amounts of damage is made and lives lost.

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Preparation and prediction techniques can be very different in MEDCs and LEDCs.

MEDCs [ MEDC: A More Economically Developed Country (MEDC) has high levels of development based on economic indicators such as gross domestic product (the country's income). ] have the resources and technology to predict and monitor the occurrence of storms, eg using satellites and specially equipped aircraft. They are also equipped to train the emergency services appropriately and to educate people about necessary precautions.

Storm warnings can be issued to enable the population to evacuate or prepare themselves for the storm. People can prepare by storing food and water or boarding up their windows.

LEDCs [ LEDC: A Less Economically Developed Country (LEDC) has low levels of development, based on economic indicators, such as gross domestic product (the country's income). ] are often less prepared. They may rely on aid (sometimes reluctantly) from MEDCs for the rescue and recovery process, as was the case with Cyclone Sidr in Bangladesh, November 2007.

Effects of tropical storms

The intense winds of tropical storms can destroy whole communities, buildings and communication networks. As well as their own destructive energy, the winds generate abnormally high waves and tidal surges. Sometimes the most destructive elements of a storm are the subsequent high seas and flooding.

MEDCs [ MEDC: A More Economically Developed Country (MEDC) has high levels of development based on economic indicators such as gross domestic product (the country's income). ] are better placed to reduce the effects of tropical storms because they have more financial, educational and technological resources to help deal with them. They better able to observe and predict storm behaviour and can invest in infrastructure to withstand storms - as well as spending more money on repairing the damage caused.

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Preparation and prediction techniques can be very different in MEDCs and LEDCs. MEDCs [ MEDC: A More Economically Developed Country (MEDC) has high levels of development based on economic indicators such as gross domestic product (the country's income). ] have the resources and technology to predict and monitor the occurrence of storms, eg using satellites and specially equipped aircraft.

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Australian region tropical cyclone warnings, forecasts, seasonal outlooks, cyclone history, climatology and related information

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3 Ways the natural disaster can be modelled to educate others

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3 Ways the natural disaster can be modelled to educate others

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Uploaded by lars veenstra on 2015-06-24.