Tropical storms

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  • Tropical storms
    • Case study: Typhoon Haiyan
      • Secondary effects
        • Landslides blocked roads
        • 800,000 litre oil spill
        • Looting and crime causes 8 deaths
      • Primary effects
        • 5 million homeless
        • 5m storm surge
        • 6000 killed
        • 90% of Tacloban destroyed
        • 75% of farmers lost their livelihoods
      • Immediate responses
        • Curfew to stop looting
        • Aid from the Red Cross provided water and food
        • $1.5 billion in aid in total
      • Category 5 with wind speeds at 315kmh
      • Long term responses
        • Build back better scheme
        • Launched a billboard in New York saying thank you
        • Oxfam gave boats to fisherman
        • Improved warning systems
      • Philippines
      • November 2015
    • Conditions needed
      • Between 5 and 30 degrees
      • Sea temperatures more than 27 degrees
        • Sea needs to be able to evaporate
    • Climate change affecting tropical storms
      • Increased intensity
      • Increased frequency
      • Happens all over the world, not just around the equator
    • Features of a tropical storm
      • Eye wall
        • Spiralling rising air
        • Very strong winds
        • Torrential rain
        • Tall cloud
        • Low temperature
      • Eye
        • Low pressure
        • Caused by descending air
        • High temperature
        • Light winds
        • No rainfall
        • No clouds
    • Characteristic
      • Heavy rain
      • Intense low pressure
      • Cold air
    • How does one form?
      • 1. Warm air rises then condenses
        • This is what powers the storm as it releases energy
      • 3. Coriolis  effect causes the air to spin
        • South of the equator, they spin clockwise
        • In the Northern hemisphere they spin anti- clockwise
      • 2. Rising air creates low pressured
        • This low pressure creates surface winds
      • 4. When they reach land, they become less powerful as they run out of water
        • They always move West due to Easterly winds

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