[Campbell Biology P.1237] Suppose global air circulation patterns reversed, with moist air as... | Practice Question

Suppose global air circulation patterns reversed, with moist air ascending at 30° north and south latitude and descending at the equator. Based on your understanding of climate and biomes, at what latitude would you most likely find deserts in this scenario?

  • A: 0° (Equator)
  • B: 30° North and South
  • C: 60° North and South
  • D: 90° (Poles)

Explanation

Deserts are typically found where dry air descends. In normal global air circulation, dry air descends at 30° N and S latitude. If the pattern reversed, with moist air ascending at 30° N/S and descending at the equator, then the equator 0° would experience the descending dry air, leading to desert conditions there.