hurricanes – gcse presentation climate, environment and people miss parson – allerton grange...
TRANSCRIPT
HURRICANES – GCSE Presentation
Climate, Environment and People
Miss Parson – Allerton Grange School
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.
http://news.bbc.co.uk/cbbcnews/hi/newsid_4020000/newsid_4022100/4022129.stm
Fantastic demonstration of how a Cyclone develops !!
You should now understand the conditions in which a cyclone will form. Use the animation to help you
describe how the Hurricane develops
Spiralling rain bands Trade
windsConverging warm moist air
Descending dry air Centre of storm, calm, clear sky
Torrential rain, thunder, lightning
Clouds form, cumulus and cumulonimbus
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
Global Distribution and Regional
Names
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!!)
EFFECTS
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
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
Hurricane Hazards !!
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
STORM SURGE
S
Hurricane Mitch
Date: 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.
Think about the effects. Social, environmental and economical ?
Note down as many effects you can think of
http://news.bbc.co.uk/1/hi/world/210851.stm
http://www.osei.noaa.gov/mitch.html
http://www.metoffice.gov.uk/sec2/sec2cyclone/tcbulletins/mitch.html
http://www.georesources.co.uk/mitchstoryks5.htm
http://www.hurricaneville.com/mitch.html
Good websites to find out more about Hurricane Mitch
Special reports, eye witness accounts, coping with the damage, the damage, the background
Fact sheets, images, the costs
Track the Hurricane, the effects – make sure you go to Alevel section
Formation, aftermath
Special coverage, imagery
Looting occurred
when everyone evacuated the city
Good websites to find out more about Hurricane
Katrina
http://en.wikipedia.org/wiki/Hurricane_Katrina
http://news.bbc.co.uk/1/hi/in_depth/americas/2005/hurricane_katrina/default.stm
Excellent animations, looks at causes, effects and responses
Comprehensive coverage of the Hurricane
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
Management
MEDCs
•More investment
•Planning systems
•Sophisticated warning systems
•Better defences
•Comprehensive emergency services
•Well prepared
Re do diagram slide 5, 11
http://www.flickr.com/photos/48135670@N00/97951579/ - slide 1,3http://www.flickr.com/photos/74052799@N00/54368363/ - slide 2http://www.flickr.com/photos/himawan_dari__berokan_bawen/66736551/ - slide 6http://www.flickr.com/photos/nsaum/2851762532/ - slide 8http://www.flickr.com/photos/74052799@N00/54368363/ - slide 8http://www.flickr.com/photos/etiennescattaneunaltra/2219913470/ - slide 9http://www.flickr.com/photos/fujr/1476169408/ - slide 10http://www.flickr.com/photos/andrew_clough/96930281/ - slide 12http://www.flickr.com/photos/brightblightcafe/526853639/in/photostream/ - slide 14http://www.flickr.com/photos/searchdog/2399340848/in/photostream/ - slide 14http://www.flickr.com/photos/glo_pix/23034538/ - slide 14http://www.flickr.com/photos/searchdog/2398524469/ - slide 15http://www.flickr.com/photos/searchdog/2398530523/in/photostream/ -slide 15http://www.flickr.com/photos/searchdog/2399348802/in/photostream/ - slide 15http://www.flickr.com/photos/brightblightcafe/526768620/ - slide 16http://www.flickr.com/photos/searchdog/2398531039/in/photostream/ - slide 16http://www.flickr.com/photos/tingmen/39035502/ - slide 18http://www.flickr.com/photos/nika7k/38300634/ - slide 19http://www.flickr.com/photos/yerffej9/98388080/ - slide 20http://www.flickr.com/photos/chuckp/52326674/ - slide 21http://www.flickr.com/photos/911review/222620863/ - slide 22http://www.flickr.com/photos/911review/222620864/in/photostream/ - slide 23http://www.flickr.com/photos/911review/222622312/in/photostream/ - slide 24http://www.flickr.com/photos/wadegriffith/450699459/ - slide 25http://www.flickr.com/photos/inkyfingerz/454976773/ - slide 27http://www.flickr.com/photos/julki/2947057184/ - slide 27http://www.flickr.com/photos/konaboy/121423722/ - slide 27