GEOG 205 Lecture 8: Module 8- Hurricanes and Typhoons
29 Nov 2017
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Document Summary
They are low pressure systems that develop near the equator. Hurricanes have wind speeds greater than 74 mph. Ocean temperature must exceed 27 degrees c (80 f) Deep warm water provides the energy soruce to sustain the hurricane. Warm water must reach depths of 100 m. Hurricanes do not occur in the south atlantic because water is too cold. Hurricanes can also form within the caribbean. Pacific hurricanes (typhoons) can reach higher strengths and live longer than atlantic. Cape verde storms are convetive storms that develop off the northwest coast of africa atmospheric waves. Hurricanes are a heat engine, transferring heat from the ocean to the atmosphere. Heat from the warm water is exhausted out of the top of the storm. Some air sinks into the eye of the storm creating clear and calm conditions. High temperature and salinity in the south atlantic.
