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To form and sustain itself, a tropical cyclone typically requires ocean surface temperatures of at least what level?

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Correct answer: 26.5 degrees Celsius

Hurricanes need warm ocean water of at least 26.5 degrees Celsius down to a depth of about 50 meters to fuel their heat engines. This warm water evaporates rapidly, providing the moist air that powers the storm. As climate change warms the oceans, storms have more of this thermal energy to draw upon. Photo: Background image: NASA this version: Nilfanion, Wikimedia Commons, Public domain.

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Source: Wikipedia (CC BY-SA)

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