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Unit 6: 8.10 C
Tropical Cyclones
| Question | Answer |
|---|---|
| hurricane | a large tropical cyclone with high powered circular winds that move in a counter-clockwise direction |
| cyclones | tropical cyclone that form in the Southwestern Pacific and Indian Ocean. Spins in a clockwise direction |
| typhoons | tropical cyclone that forms in the Northwestern Pacific and spins in a counter-clockwise direction |
| latitudes | location of 5 degrees to 20 degrees latitude is where tropical cyclones form mostly |
| ocean currents | continuous directed movements of seawater; warm ocean currents provide a source of energy that fuel tropical cyclones |
| low pressure system | warm water evaporates and rises into the atmosphere, becoming less dense and lessening pressure on the earth; associated with stormy unsettled weather; causes more air to be drawn in from surrounding areas |
| coriolis effect | rotation of the earth which cause the rising air to spin around the low pressure center |
| wind shear | change in wind speed and direction with height in the atmosphere |
| low wind shear | little/small change in wind speed or direction over a short vertical distance. Allows tropical storms to form and expand. |
| high wind shear | large changes in wind speed or direction over a short vertical distance. Slows a tropical storms ability to form and expand |
| tropical depression | storms that have wind speeds less than or equal to 38 mph |
| tropical storm | storms that have wind speeds between 39-73 mph |
| storm surge | strong winds of a tropical storm pushing water toward the shore; usually the most damaging part of a hurricane |
| eye of the storm | area of calm weather at the center of a hurricane; 20-40 miles in diameter; area of the storms lowest pressure |