Which global atmospheric feature moves north and south with the seasons and affects rainfall?

Which global atmospheric feature moves north and south with the seasons and affects rainfall?

• A. Interception
• B. Lahars
• C. Intercropping
• D. ITCZ

Answer: (D)

The global feature being tested is a tropical rainfall belt that tracks the Sun. The Intertropical Convergence Zone moves north and south with the seasons, following the overhead sun, and this movement brings seasonal rainfall to different regions. It forms where the northeast and southeast trade winds meet near the equator, causing air to rise and produce heavy rain. As the Sun's position shifts, the ITCZ shifts away from the equator—northward during the Northern Hemisphere summer and southward during the Southern Hemisphere summer—driving the wet and dry seasons in much of the tropics and monsoon regions. Other terms don’t describe a moving atmospheric feature: interception is rainfall captured by vegetation, lahars are volcanic mudflows, and intercropping is an agricultural practice.

The global feature being tested is a tropical rainfall belt that tracks the Sun. The Intertropical Convergence Zone moves north and south with the seasons, following the overhead sun, and this movement brings seasonal rainfall to different regions. It forms where the northeast and southeast trade winds meet near the equator, causing air to rise and produce heavy rain. As the Sun's position shifts, the ITCZ shifts away from the equator—northward during the Northern Hemisphere summer and southward during the Southern Hemisphere summer—driving the wet and dry seasons in much of the tropics and monsoon regions.

Other terms don’t describe a moving atmospheric feature: interception is rainfall captured by vegetation, lahars are volcanic mudflows, and intercropping is an agricultural practice.