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Week 3 Lecture 1: Tropical CyclonesHurricane Tracks and the Atlantic Hurricane Season1)On average 80 tropicla cyclones per yeara)50-70% of which achieve hurricane strengthb)Called Hurricanes when close to Americac)Typhoons near Asiad)Cyclones for the rest2)Geographicallya)North latitudes- water too coldb)South latitudes – water too colc)Middles latitudes- No hurricanes(because of no Coriolis Effect)c.i) South clockwisec.ii)North counter-clockwise3)Controlling the cyconesa)Typical Track: hurricanes move form E W and then curve to the northa.i) Steered westward by the trade windsa.ii)Turned north by the Coriollis Force and the circulation around the subtropical high pressure system4)Video notesa)Tropical cyclones go by different names depending on where they are in the world. Near the US they are called "hurricanes". Near Southeast Asia (China and Japan) they are called "Typhoons". In the Indian Ocean and South Pacific, they are called "Cyclones".