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HURRICANES, TYPHOONS AND TROPICAL CYCLONES

HURRICANES, TYPHOONS AND TROPICAL CYCLONES. BY: MONIKA, MAJD, AND WES.

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HURRICANES, TYPHOONS AND TROPICAL CYCLONES

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  1. HURRICANES, TYPHOONS AND TROPICAL CYCLONES BY: MONIKA, MAJD, AND WES

  2. Tropical cyclones occur all around the world, but they are not always referred to by the same name. They are called hurricanes in the Atlantic and Caribbean, typhoons in the West Pacific, baguios in the Philippines, cordonazos in Mexico, and tainos in Haiti.

  3. WHAT ARE TROPICAL CYCLONES? Tropical cyclones consist of high speed winds blowing circularly around a low pressure center which averages 24km in diameter. This center is known as the eye of the storm. The eye develops when warm, saturated air is forced up by denser, cooler air. The atmospheric pressure in a tropical cyclone drops sharply as you get closer to the center. The winds also stop and the clouds lift, but the seas remain very violent in the eye.

  4. HOW THEY FORM Evaporation and conduction transfer heat to the atmosphere quickly when the sun warms up the oceans. The water vapour generated by this is the fuel that drives the tropical storm because the vapour condensing into clouds releases enormous amounts of heat into the cyclone. This mix of heat and moisture frequently cause several thunderstorms that can grow into a tropical cyclone. These thunderstorms require an easterly wave to be developed into an Atlantic hurricane. Typhoons in the Pacific and Indian oceans and some hurricanes in the Atlantic are started by the waves near the equator.

  5. HOW THEY FORM For a storm to develop and mature into a tropical cyclone, it must overcome many obstacles. In fact, only about nine of the more than 1000 seedlings tracked each year in the Atlantic will evolve into tropical cyclones. That’s less than 1%!

  6. WHEN AND WHERE THEY OCCUR Tropical cyclones are most likely to occur in the hot, humid, late-summer environment of the tropics and are least likely to occur at the north and south poles. They occur several times a year. There have been no such events in our area because they require the warm ocean water, in the tropics, to form.

  7. RECENT OCCURRENCES • Arthur • Bertha • Cristobal • Dolly • Edouard • Fay • Gustav • Hanna • Isidore • Josephine • Kyle • Lili

  8. POTENTIAL FOR DESTRUCTION • Many people have been working to improve systems of prediction of hurricanes. They have been using radar, sea-based recording devices, geosynchronous weather satellites, and other devices. They have also been following storms starting from when they are formed. This has helped minimize loss of life, but property damage is still great. • The area affected by winds of destructive force can be larger than 240km in diameter, and areas affected by gale winds average 480km in diameter. • Tropical cyclones have killed more people around the world than any other kind of storm.

  9. DID YOU KNOW... • Tropical cyclones are the only types of storms named as they occur. • Tropical cyclones can last for as little as a few days to more than three weeks. • If the tropical cyclone hits land, it brings a mound of water that can be up to 6m high, called a storm surge. • A single tropical cyclone can cause millions of dollars of damage.

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