Tropical storms
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Tropical storms






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Tropical storms Tropical storms Presentation Transcript

  • Tropical Storms While watching the images, identify the primary and secondary effects of tropical storms
  • Tropical Storms
    • Definition:
      • Tropical storms are intensive, low pressure weather systems known in different parts of the world as hurricanes, cyclones, typhoons
  • Describe the distribution of tropical storms (4)
  • Origins
    • Form over oceans between the Tropics of Cancer and Capricorn
    • Over warm ocean waters
  • Tropical Storms
    • Forms over ocean with temperatures of at least 27 ° C
    • Water at least 60 m deep
    • Form in hottest times of the year (May-Nov in northern hemisphere, Nov - Apr in southern hemisphere)
    • Low pressure (air pressure low)
  • What are the natural processes that allow tropical storms to form?
    • BBC Link
    • Create a 5 stage flowchart during the explanation to explain how tropical storms form.
  • Affected by disasters Killed by disasters What is the difference – why are the patterns different between the two maps?
  • MEDC case study: Hurricane Katrina
    • Hurricane Katrina
    • 29 th August 2005
    • USA (formed in Bahamas first, made landfall as Category 3 hurricane in USA)
    • Worst affected = Florida, Louisiana (especially New Orleans)
    • 175mph winds
    • 80% of city evacuated
    • Breached levees (flood defences) with its storm surge
    • 1200 drowned
    • 600 died from disease
    • 1million homeless
    • $90.9billion damages (costliest disaster in US history)
    • Google timeline
  • Jamie’s American Road Trip
    • Impacts of Hurricane Katrina on People and the Environment.
  • LEDC case study: Cyclone Nargis
    • Worst natural disaster in Burma
    • It began as an intense tropical depression on April 27th 2008 in the Bay of Bengal.
    • Meteorologists initially thought that the storm would track over Bangladesh
    • However, the storm changed direction and headed towards Burma, where it made land over the Irrawaddy delta in the south of the country on May 2nd.
    • Category 3/4 storm on the Simpson–Saffir scale
    • 215 km/hr winds
    • In some places 600mm of rain fell
    • 146000 people were killed, or reported missing
    • $10 million damage occurred
    • 75% of hospitals and clinics were badly destroyed or damaged
    • Diarrhoea, dysentery and skin infections afflicted the survivors who were crammed into monasteries, schools and other buildings after arriving in towns already under pressure before the cyclone.
  • Case Study Mind Map
    • Create a mind map that compares Hurricane Katrina and Cyclone Nargis.
    • Focus upon:
      • Location
      • Primary effects
      • Secondary effects
      • Impacts of people
      • Responses
    OCR Geography p136-143 photocopies Use for comparison of case studies
  • Task
    • Individually produce a leaflet about hurricane Katrina
    • Pages 124 of Geog.GCSE
    • Headings:
      • Impact on people
      • Impact on the economy (anything to do with jobs or money)
      • Impact on the environment
      • What was done to lessen the impact of Hurricane Katrina?
      • Why do people continue to live in areas at risk from tropical storms?
    • If finished use BBC Bitesize Weather and Climate tests
  • How to prepare for a hurricane
    • Create a leaflet aimed at Florida residents.
    • The aim of the leaflet is to advise local residents how they should prepare for a hurricane
    • Must also be understood by non-English speakers (Florida has a high Hispanic population) So think about images.
    • Think about:
      • Outline the possible effects of hurricanes:
        • Storm surge
        • Wind speed
      • Evacuation plans – what to pack
      • Emergency supplies at home
      • Protecting homes and businesses from damage and flooding
      • Protecting against looting
      • Search for ‘prepare for hurricanes’