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EARTHSC 2GG3 (199)
Lecture

Earth Science - Lecture 26 Notes.docx

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Department
Earth Sciences
Course
EARTHSC 2GG3
Professor
Sergei Basik
Semester
Fall

Description
November 5, 2013 HURRICANES: FORMATION AND CLASSIFICATION  Tropical cyclone: storm system of low-pressure surrounded by strong rotating winds (more than 200km/h), with torrential rains, thunderstorms, tornadoes, high surge of seawater  Hurricanes: o A tropical cyclone with 1 min average winds at 10m altitude in excess of 32m/s occurring over the north Atlantic or eastern North Pacific o North Atlantic and Eastern Pacific  Typhoons: western Pacific, Japan, southeast Asia  Cyclones: south Asia (India, Bangladesh, Sri Lanka Formation of Hurricanes  Begin to develop over warm seawater, between 5 and 20 degrees latitude  Rising air and condensation can build up into convective ‘chimney’ of thunderstorms o Convection may strengthen when air rises to high elevations o Warm air rises, expands and cools, releases latent heat of condensation  Center of storm is low-pressure zone called eye  Winds rotate counterclockwise in northern hemisphere and clockwise in the southern hemisphere  Highest wind speeds exist along the edge of the eye wall Class
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