Earth: An Introduction to Physical Geology (12th Edition)

Published by Pearson
ISBN 10: 0134074254
ISBN 13: 978-0-13407-425-2

Chapter 20 - Section 20.6 - Hurricanes: The Ultimate Coastal Hazard - Concept Checks - Page 617: 1

Answer

Several factors influence where and when hurricane formation takes place. Warm ocean waters are essential, with a temperature of at least 26.5°C (80°F), to provide the necessary heat and moisture for hurricane development and intensification. Atmospheric instability is crucial for allowing warm, moist air near the surface to rise and form thunderstorms, which are the building blocks of hurricanes. The Coriolis effect, caused by the Earth's rotation, is necessary for the rotation and organization of a developing tropical cyclone. Low vertical wind shear (the change in wind speed and direction with height) is also vital to maintain a vertically aligned, well-organized structure. Finally, high levels of atmospheric moisture and humidity are needed to fuel the convective processes and sustain the hurricane's energy.

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