Tropical Storms and Hurricanes Helena H, Rebecca, Anna and Poppy  (FEHS Geog Students 2009-11)
How Hurricanes/Tropical Storms Occur <ul><li>A tropical storm is formed over tropical oceans and moves away from the equat...
Hurricane Katrina <ul><li>At first it began as a very low pressure weather system, which strengthened to become a tropical...
Spiraling winds Warm, moist air being drawn in Prevailing winds Water vapour from the sea
Hurricanes Affected People In Myanmar 2008 Emergency shelters provided. Cleaning up common infrastructure Crops destroyed ...
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Tropical storms

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Made by GCSE students for their revision work. May contain some misconceptions! -_^

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Transcript of "Tropical storms"

  1. 1. Tropical Storms and Hurricanes Helena H, Rebecca, Anna and Poppy (FEHS Geog Students 2009-11)
  2. 2. How Hurricanes/Tropical Storms Occur <ul><li>A tropical storm is formed over tropical oceans and moves away from the equator. They are also known as a cyclone or a large depression. </li></ul><ul><li>They are also formed in warm oceans, where the water is around 27 degrees and is deeper than 60m. The wind speed usually exceeds 74mph. </li></ul><ul><li>In the northern hemisphere, the winds rotate anti-clockwise. Fast rising warm air creates an area of very low pressure (the eye of the storm) which sucks in air and absorbs moisture from the oceans. </li></ul>
  3. 3. Hurricane Katrina <ul><li>At first it began as a very low pressure weather system, which strengthened to become a tropical storm and eventually a hurricane as it moved west and neared Florida. </li></ul><ul><li>http://news.bbc.co.uk/1/shared/spl/hi/americas/05/katrina/html/ </li></ul><ul><li>The levees and flood walls that protected New Orleans were breached in 53 different places, allowing water to flood the city up to 3m deep. This was down to human fault as the levees were built on a flood plain, which was below sea level. </li></ul><ul><li>Around 80% if the city was underwater – which was made worse by 250mm of heavy rain. </li></ul><ul><li>Deaths totalled 1836. Many drowned in the floodwaters. </li></ul><ul><li>Over 10,000 people were made homeless. </li></ul><ul><li>Over 3 million people were without electricity. </li></ul><ul><li>Water contamination occurred, along with a lack of food and resources. </li></ul><ul><li>Road access was also difficult with collapsed bridges and major transport links being damaged. </li></ul><ul><li>Crime was also a serious issue. Looting and thieving became severe issues. </li></ul>
  4. 4. Spiraling winds Warm, moist air being drawn in Prevailing winds Water vapour from the sea
  5. 5. Hurricanes Affected People In Myanmar 2008 Emergency shelters provided. Cleaning up common infrastructure Crops destroyed More than 20 homes destroyed. Grants given to hire casual labor so crops can be planted in time Grants from UN Development program enabled villagers to buy new boats and nets Public transport links destroyed Introduction of self – reliance groups to create sustainable ways of living and small scale business activities to build up a common fund Lack of income from fishing Livelihoods destroyed/unsustainable livelihoods

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