The Role of the ITCZ To understand why hurricanes bypass South America, one must first look to the sky, specifically to a band of low pressure known as the Intertropical Convergence Zone, or ITCZ. Yet, if you scan the satellite maps tracking these immense rotating storms, a curious void appears just off the northern coast of South America.
Why Hurricanes Cannot Form Along South America's Borders
The upper-level atmosphere over South America is characterized by strong winds and high wind shear—the change in wind speed or direction with height. Steering Winds and Upper-Level Shear Even if a storm were to miraculously form south of the typical hurricane belt, the surrounding wind patterns would likely tear it apart.
5°C (80°F) to sustain themselves. Hurricanes are heat engines, drawing their energy from warm sea surface temperatures, generally requiring waters above 26.
Why South America's Borders and Geography Prevent Hurricane Formation
The system would likely remain a disorganized cluster of thunderstorms, unable to achieve the symmetry and power characteristic of a hurricane. Here, the geography works against them.
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