Why are there deserts at the junction of the Ferrel and Hadley cells? Be sure to refer to air movement, air temperature, and water vapor content in your answer.
What will be an ideal response?
Hadley cells cycle air away from the equator. This warm, moist air rises and produces lots of rainfall, resulting in the tropics. However, when the air becomes cooler and drier, it sinks back down to the surface of the earth and creates the dry desert conditions. The air has little to no moisture in it, so little rainfall is produced. The lack of water vapor in the air is also a contributing factor to the temperature fluctuations. The same happens with Ferrel cells, but further away from the equator. The cooler, dry air still sinks at the same place that the air from the Hadley cell sinks at, again resulting in desert conditions.
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