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HURRICANES – GCSE Presentation Climate, Environment and People

HURRICANES – GCSE Presentation Climate, Environment and People. Miss Parson – Allerton Grange School. Hurricane:

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HURRICANES – GCSE Presentation Climate, Environment and People

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  1. HURRICANES – GCSE Presentation Climate, Environment and People Miss Parson – Allerton Grange School

  2. Hurricane: Hurricanes are cyclones of tropical origin with wind speeds of at least 118 kilometres per hour. A hurricane is a large, rotating storm, where the winds move around a relatively calm centre called the ‘eye’. These storms are known as ‘typhoons’ in the western Pacific, ‘cyclones’ in the Indian Ocean, and ‘baguios’ in the Philippines. Each storm usually has a life span of several days.

  3. EYE EYE WALL RAINBANDS

  4. Fantastic demonstration of how a Cyclone develops !! http://news.bbc.co.uk/cbbcnews/hi/newsid_4020000/newsid_4022100/4022129.stm You should now understand the conditions in which a cyclone will form. Use the animation to help you describe how the Hurricane develops

  5. Descending dry air Centre of storm, calm, clear sky Torrential rain, thunder, lightning Clouds form, cumulus and cumulonimbus Spiralling rain bands Trade winds Converging warm moist air

  6. Global Distribution and Regional Names • Note down the four areas shown and the regional names, mark them on the map • USA hurricanes • India / East Coast Africa / Australia Tropical cyclones • Asia Typhoons

  7. What’s required for the hurricane to form ? Hurricanes form over tropical waters (between 8° and 20° latitude) in areas of high humidity, light winds, and warm sea surface temperatures (typically 26.5°C [80°F] or greater). Cyclone "season" in the northern hemisphere runs from June through November. They occur at a location at least 5°North or South of the Equator. Between the Tropic of Cancer and the Tropic of Capricorn. There has to be an ocean depth of at least 70m, this moisture provides the Latent Heat released by condensation which drives the system (like the fuel in a car!!)

  8. EFFECTS

  9. Hurricane Hazards !! Often exceeds 150km per hour, have been known to reach over 300 km per hour. Can winds can bring about the collapse of buildings, cause structural damage to roads and bridges, bring down transmission lines and devastate agricultural areas WIND

  10. Hurricane Hazards !! Often over 100mm per day, causes severe flooding and landslides. High relief can exaggerate already high rainfall figures and totals in access of 500-700mm per day HEAVY RAIN

  11. Hurricane Hazards !! STORM SURGES Storm surges result form the piling up of wind driven rains and the ocean heaving up under reduced pressure. These can flood low-lying coastal areas. Storm surges cause most of the deaths that result from tropical cyclones

  12. CASE STUDY –effects on a LEDC HURRICANE MITCH

  13. Hurricane MitchDate: 27 October 1998, Central AmericaDead: 19,000Homeless: 2.7mDamage: $5.4bn What happened: Hurricane Mitch, one of the most deadly Atlantic storms in history, tore across central America causing flooding and landslides. Nicaragua and Honduras bore the brunt. Development in some countries was set back by decades. Response: Although forecasters had predicted the hurricane, the West only responded after the event. It took a week for large-scale food aid to arrive. Reports from Nicaragua said people were clinging to treetops for days after the rains had stopped. International debt repayments were suspended and the US put together a multi-million dollar aid package. Former President George Bush stressed it was in America’s interest to help in order to prevent a huge tide of economic migrants heading for the US. Verdict: The initial response from the West was slow - major aid from the US did not arrive in Honduras until 8 November. Aid agencies said the effectiveness of aid was undermined by crippling debt repayments. Central American countries admitted environmental degradation had exacerbated the disaster.

  14. Think about the effects. Social, environmental and economical ?

  15. Note down as many effects you can think of

  16. Good websites to find out more about Hurricane Mitch http://news.bbc.co.uk/1/hi/world/210851.stm Special reports, eye witness accounts, coping with the damage, the damage, the background http://www.metoffice.gov.uk/sec2/sec2cyclone/tcbulletins/mitch.html Fact sheets, images, the costs http://www.georesources.co.uk/mitchstoryks5.htm Track the Hurricane, the effects – make sure you go to Alevel section http://www.hurricaneville.com/mitch.html Formation, aftermath http://www.osei.noaa.gov/mitch.html Special coverage, imagery

  17. Hurricane Katrina Case - study

  18. Looting occurred when everyone evacuated the city

  19. Good websites to find out more about Hurricane Katrina http://en.wikipedia.org/wiki/Hurricane_Katrina Comprehensive coverage of the Hurricane http://news.bbc.co.uk/1/hi/in_depth/americas/2005/hurricane_katrina/default.stm Excellent animations, looks at causes, effects and responses http://www.cnn.com/SPECIALS/2005/katrina/ Summarises impacts, look at the bottom of the page, rebuilding, people, rescue and relief, storm and flood. http://www.nola.com/hurricane/photos/ Photo images

  20. Management • MEDCs • More investment • Planning systems • Sophisticated warning systems • Better defences • Comprehensive emergency services • Well prepared

  21. Re do diagram slide 5, 11 http://www.flickr.com/photos/48135670@N00/97951579/ - slide 1,3 http://www.flickr.com/photos/74052799@N00/54368363/ - slide 2 http://www.flickr.com/photos/himawan_dari__berokan_bawen/66736551/ - slide 6 http://www.flickr.com/photos/nsaum/2851762532/ - slide 8 http://www.flickr.com/photos/74052799@N00/54368363/ - slide 8 http://www.flickr.com/photos/etiennescattaneunaltra/2219913470/ - slide 9 http://www.flickr.com/photos/fujr/1476169408/ - slide 10 http://www.flickr.com/photos/andrew_clough/96930281/ - slide 12 http://www.flickr.com/photos/brightblightcafe/526853639/in/photostream/ - slide 14 http://www.flickr.com/photos/searchdog/2399340848/in/photostream/ - slide 14 http://www.flickr.com/photos/glo_pix/23034538/ - slide 14 http://www.flickr.com/photos/searchdog/2398524469/ - slide 15 http://www.flickr.com/photos/searchdog/2398530523/in/photostream/ -slide 15 http://www.flickr.com/photos/searchdog/2399348802/in/photostream/ - slide 15 http://www.flickr.com/photos/brightblightcafe/526768620/ - slide 16 http://www.flickr.com/photos/searchdog/2398531039/in/photostream/ - slide 16 http://www.flickr.com/photos/tingmen/39035502/ - slide 18 http://www.flickr.com/photos/nika7k/38300634/ - slide 19 http://www.flickr.com/photos/yerffej9/98388080/ - slide 20 http://www.flickr.com/photos/chuckp/52326674/ - slide 21 http://www.flickr.com/photos/911review/222620863/ - slide 22 http://www.flickr.com/photos/911review/222620864/in/photostream/ - slide 23 http://www.flickr.com/photos/911review/222622312/in/photostream/ - slide 24 http://www.flickr.com/photos/wadegriffith/450699459/ - slide 25 http://www.flickr.com/photos/inkyfingerz/454976773/ - slide 27 http://www.flickr.com/photos/julki/2947057184/ - slide 27 http://www.flickr.com/photos/konaboy/121423722/ - slide 27

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