What is the zone of rising air near the equator known for sultry air and variable breezes?

• A. Horse Latitudes
• B. Doldrums
• C. Trade Winds
• D. Polar Front

Answer: (B)

Rising air near the equator happens because intense solar heating makes moist air rise, creating a belt of low pressure and strong convection. This convergence and continual uplift produce hot, humid, sultry conditions and winds that are notoriously variable and often calm. That combination of rising air and uncertain winds is why this region is known as the doldrums, tied to the Intertropical Convergence Zone where the trade winds from both hemispheres meet and air climbs upward, fueling frequent storms but no steady breeze.

In other parts of the world, other patterns dominate: horse latitudes are subtropical highs where air sinks, giving light but persistent winds; the trade winds are steady easterlies caused by the Hadley circulation away from the equator; and the polar front sits much farther north or south, where cold polar air meets warmer air.