weather hazards geography

• What do tropical revolving storms need to form?

  Sea temperature above 27ºc

  Low wind shear

  An ocean
• What is a tropical revolving storm?

  A rotating storm that develops in the tropics, creating an area of intense low pressure
• Where do tropical revolving storms usually occur?

  5-30º N or S of the equator
• In what direction do tropical storms spin in the Northern Hemisphere?

  Anti-clockwise
• In what direction do tropical storms spin in the Southern Hemisphere?

  Clockwise
• What is the most violent part of a tropical revolving storm?

  Eyewall
• How does climate change affect tropical revolving storms?

  Rising temperatures mean there's a higher chance that the ocean can reach 27ºc, so tropical storms will be more widespread
• How do tropical revolving storms form?

  1. Warm air in the ocean rises

  2. It leaves behind an area of low pressure, which is instantly filled by surrounding air

  3. Causes strong winds

  4. Rising air cools and condenses to form towering storm clouds

  5. Coriolis effect causes storm to spin around the eye

  6. Cold air sinks in the eye, making it drier and calmer

  7. Travels across the ocean with prevailing winds
• What happens when a tropical revolving storm reaches land?

  Loss of energy source and friction causes the storm to lose power and slow down
• Why are there no tropical revolving storms on the equator?

  The Coriolis effect isn't strong enough to start the spinning motion
• When did Typhoon Haiyan occur?

  8th November 2013
• Highest wind speed during typhoon Haiyan?

  315 km/h
• How many people died due to typhoon Haiyan?

  6000
• What % of Tacloban was destroyed due to typhoon Haiyan?

  90%
• How many $ damage was done due to typhoon Haiyan?

  $12 billion
• How many people were made homeless due to typhoon Haiyan?

  4.1 million
• Secondary effects of typhoon Haiyan

  Looting

  Typhoid outbreak

  Food shortage
• How many people died in a stampede for food after typhoon Haiyan?

  8
• Response to typhoon Haiyan

  Curfew to reduce looting

  1 million food packs delivered

  Mangroves replanted

  200 tonnes of aid delivered
• How can we monitor/ predict tropical revolving storms?

  Satellite readings on developing storms to give early warning
• How can protect against tropical revolving storms?

  Hurricane straps between roof and walls

  Storm shutters

  Plant mangroves to absorb wave energy
• How can we plan for tropical revolving storms?

  Disaster supply kits

  Keep fuel in cars
• What was the cause of the 2017 heatwave?

  A belt of high pressure caused hot, humid air to be dragged up from France
• When was the 2017 heatwave?

  17-21st June
• What was the highest temperature recorded during the 2017 heatwave?

  34.5ºc in Heathrow
• What were the impacts of the 2017 heatwave?

  3 drowning incidents

  Roads melting

  Train services cancelled

  High air pollution in congested areas
• What were the management strategies of the 2017 heatwave?

  Speed restrictions on rail lines

  Warnings sent out to the public