Hurricanes Flashcards
Hurricanes rotate ______ at speeds of _____ and only form over oceans warmer than _____
- counter-clockwise
- 120km/hr+
- 26.5 C
tropical cyclones are large cells of ___.____ air that rotate around _____ zones
- moist, warm
- low pressure
tropical cyclones require ______ and produce ______
- heat, moisture, Earth’s rotation
- strong wind, heavy rain, storm surges, torrnadoes
tropical cyclones can also be called:
- typhoons, cyclones, hurricanes depending on location
- tropical depression or tropical storm depending on strength
widely-used hurricane scale
- Saffir-Simpson Hurricane Intensity Scale
- created in 1969
- numbers 1 to 5
How hurricanes are formed:
- Warm, moist air rises, causing zone of low pressure
- vapour consenses into cloud
- Coriolis effect causes cyclonic circulation of storm
- system grows as it travels over warm, moist air without interruption
- Tropical storm becomes hurricane after it exceeds 118 km/h
coriolis effect
deflection of a moving object relative to Earth’s surface due to rotation of the Earth
In the Northern Hemisphere, deflection is to the ____ and has _____ rotation
- right
- counter-clockwise
In the Southern Hemisphere, deflection is to the ____ and has _____ rotation
- left
- clockwise
the eye of a hurricane is is caused by:
the conservation of angular momentum
the eyewall comprises:
- clouds
- stront wind/rain
- thunderstorm columns
rainbands
rain, wind, and tornadoes that spiral out from centre
the Saffir-Simpson Scale is only for:
Atlantic and north Pacific oceans
hurricane hazards
- storm surges
- high winds/tornadoes
- flooding
Hurricant Katrina was the ____ natural disaster in America, had ____ fatalities, and flooded ____% of New Orleans
- costliest
- 1800
- 80
