Deserts typically occur in a band around 30 degrees north and 30 degrees south latitude because
A) descending air masses originating from the tropics tend to be dry.
B) trade winds have little moisture.
C) moisture-laden air is heavier than dry air and is not carried to these latitudes.
D) these locations get the most intense solar radiation of any location on Earth.

Question

Quizplus · Accepted Answer

Descending air masses originating from the tropics tend to be dry, leading to low rainfall and thus desertification. This is because warm air rises at the equator and travels towards the poles, eventually cooling and sinking at around 30 degrees north and south latitudes. As the air descends, it becomes compressed and warms up, causing any moisture to evaporate, resulting in arid conditions.

Deserts Typically Occur in a Band Around 30 Degrees North