Tropical Storms Revision Guide


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Revision material for students at The Radclyffe School studying AQA Geography B syllabus.

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Tropical Storms Revision Guide

  1. 1. Tropical Storms Revision Help<br />
  2. 2. Distribution of tropical storms <br />All occur between the Tropic of Cancer and the Tropic of Capricorn.<br />All occur over warm oceans<br />
  3. 3. Causes of Tropical storms<br /> Warm( over 27C) moist air rises from the surface of the sea.<br />As it rises it meets cooler air and condenses to make clouds and rain.<br />This condensation releases huge amounts of energy , producing strong winds.<br />The winds are driven by the spin of the earth and go round and round. <br />As the earth rotates the winds are sucked violently upwards in a vortex which can be 1,000km wide. Wind speeds can be as high as 200km per hour.<br />These storms are fuelled by damp air when they reach land, dry air is being sucked up and they loose energy<br />
  4. 4.
  5. 5. Effects of Tropical storms Hurricane Katrina 28 August 2005<br />Primary Effects<br />1800 people died survivors had to swim for their lives many trapped on roofs. <br />Levees breached in 20 places (80% of city flooded)2/3rds of cities flooding<br />Roads damaged, Bridges collapsed- twin span bridge collapsed.<br />Buildings destroyed<br />Secondary Effects<br />Oil spills <br />Industrial waste and toxic chemicals in water<br />Fall in trade business tourism<br />Overall economic impact of Hurricane Katrina was estimated to be $ 150 billion<br /> Crime looting and racial tension<br />
  6. 6. Effects of Cyclone Sidr 15 Nov. 2007<br />Primary Effects<br />3,447 deaths<br />34,500 injured<br />4 – 6.6 million affected<br />People left homeless<br />Tin roofs blown away<br />Houses and schools demolished – 1.2 million homes destroyed<br />Islands communication “snapped”<br />644,000 hectares of rice destroyed harvests of 23,000 hectares damaged<br />Poultry, goats, cattle killed<br />Washed away key production area for shrimp (second largest export) 90% of 5,000 shrimp farms destroyed <br />95% of crops destroyed in 11 districts<br />Power lines destroyed<br />Secondary Effects<br />360,000 still without shelter<br />Many without electricity and short of food<br />3,000 fishermen reported missing<br />Health problems due to contaminated water and shortage of drinking water Secondary<br />500 fishing boats destroyed<br />debt<br />Total damaged came to $ 450 million<br />Mangrove forests destroyed will take up to 40 years to recover<br />Crops of deer, tiger and other wildlife <br />Tree damage.<br />
  7. 7. Reducing the damaging effects of tropical storms.<br />Monitoring how is the formation, progress , development and tracking of a tropical storm monitored?<br />USE of GIS<br />EDUCATION<br />How do people prepare for a tropical storm in USA ?<br />How do people prepare for a tropical storm in Bangladesh?<br />
  8. 8. National Hurricane Center (Atlantic)<br />Joint Typhoon warning system (Pacific) <br />monitor the development and movement of a tropical storm. <br />
  9. 9. Preparation<br />Prepare <br />Education programmes try to raise awareness how to prepare for and respond to a tropical storm.<br />School lessons posters and leaflets.<br />Family disaster plan.<br />Emergency kit.<br />Simple methods of protecting homes from strong winds and flying debris.<br />
  10. 10. Prepare<br />Materials tested in storm simulators.<br />Windproof tiles water resistant windows.<br />Strengthened building structures.<br />Ground floor walls designed to “wash out “when a storm surges leaving only the supports . This allows the waves to wash through the building rather than destroy it.<br />
  11. 11. LEDC<br />Bangladesh can not afford the expensive equipment that the USA has.<br />Building houses on stilts in case of a storm surge.<br />Training local people to organise others in evacuation.<br />Building shelter cyclones.<br />Platforms within houses.<br />Moving houses away from river banks.<br />Training women what to wear in case they have to swim.<br />