Geography
Hurricanes, Typhoons, Cyclones
Hurricanes, Typhoons, Cyclones
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Cartes-fiches
Hurricanes
wind speeds of over 250 kph
in the Atlantic Ocean
have a spiral shape
develop as a high-pressure area twists aroung low pressure area
the eye = low pressure
Cyclone
Indian Ocean
blow with air masses from the east or the south
Typhoon
over the northwest Pacific Ocean
form as equatorial winds: blow westward before turning north and merging with westerlies around the mid-latitudes
often associated with heavy rainfall
Hurricanes requirements
warm ocean waters (24-28)
tropical disturbances
coriolis force
low pressure area/high pressure area
hurricanes seasons
northern hemisphere: mid August to late October
southern hemisphere: mid Februar - Mai
hurricanes cause to disappear
cold water temperatures
or when storn hits a large landmass
= both causes evaporation to diminish/stop
hurricanes typical characteristics
size: 100 - 700
look: spiral s shape, twisting around with eye
wind speed: 199 -252 kph : twist, 50-60 movement
duration days up to week
Saffir-Simpson-Scale
tornados/twister definition
rotating dark wind with whole system
wasserhose
wheeling wind on the water
windhose
wheeling wind on the land
tornados causes
differant air masses which com together and start to rotate
tornados typical characteristics
size: 20 - 200
look: funnel, trunk,tube, hudge, cloude
speed: rotation speed: - 500kph, movement speed: - 50 kph
duration: few minutes to over an hour
Fujita-Scale
