Grade: 12 C
Grade: 12 C
WHAT IS A TROPICAL CYCLONE? 3
HOW NAMES ARE GIVEN TO DIFFERENT TROPICAL CYCLONES 3 FORMATION OF A TROPICAL CYCLONE: 4 EFFECTS OF A TROPICAL CYCLONE 5 EYE AND CENTRE
6-7 HOW ARE TROPICAL CYCLONES PREDICTED? 7-8 THE DANGER OF A TROPICAL CYCLONE: 8 STRUCTURE OF A TROPICAL CYCLONE 9 TROPICAL CYCLONE: ELINE 10 IMPACTS OF TROPICAL ELINE: 11 HOW TROPICAL ELINE HIT MADAGASCAR; MOZAMBIQUE;
12-16 SOUTH AFRICA & ZIMBABWE: CASE STUDY + images BIBLIOGRAPHY 17
WHAT IS A TROPICAL CYCLONE?
Tropical cyclone, also called typhoon or hurricane, tropical cyclone formation. An intense circular storm that originates over warm tropical oceans and is characterized by low atmospheric pressure, high winds, and heavy rain. Drawing energy from the sea surface and maintaining its strength as long as it remains over warm water, a tropical cyclone generates winds that exceed 119 km (74 miles) per hour. In extreme cases winds may exceed 240 km (150 miles) per hour, and gusts may surpass 320 km (200 miles) per hour. With these strong winds are heavy rains and a devastating phenomenon known as the storm surge, an elevation of the sea surface that can reach 6 metres (20 feet) above normal levels. Such a combination of high winds and water makes cyclones a serious hazard for coastal areas in tropical and subtropical areas of the world. Every year during the late summer months (July–September in the Northern Hemisphere and January–March in the Southern Hemisphere), cyclones strike regions as far apart as the Gulf Coast of North America, north-western Australia, and eastern India and Bangladesh.
Hurricane structure and rotation pattern Tropical cyclones are known by various names in different parts of the world. In the North Atlantic Ocean and the eastern North Pacific they are called hurricanes, and in the western North Pacific around the Philippines, Japan, and China the storms are referred to as typhoons. In the western South Pacific and Indian Ocean they are variously referred to as severe tropical cyclones, tropical cyclones, or simply cyclones. All these different names refer to the same type of storm. HOW NAMES ARE GIVEN TO DIFFERENT TROPICAL CYCLONES
Forecasters give names to tropical cyclones, including hurricanes, to avoid confusion when more than one storm is being followed at the same time. Tropical cyclones are the only storms that forecasters name. Hurricanes are tropical cyclones in the Atlantic Basin (Atlantic, Caribbean Sea and Gulf of Mexico) and in the Pacific east of the International Date Line. Typhoons are tropical cyclones over the northern Pacific west of the date line. Tropical cyclones in the South Pacific and over the Indian Ocean are just called cyclones A storm is named when it reaches tropical storm strength with winds of 39 mph, and becomes a hurricane or typhoon when its wind speed reaches 74 mph. Tornadoes come and go so quickly usually in minutes that forecasters don't have time...
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