Question

question 7
what mechanism is the primary driver of the single - cell model?
a differential heating from the equator to the poles
b tilt of the earth on its axis
c specific heat differences
d different day length at different latitudes

Explanation:

The single - cell model of atmospheric circulation is based on the idea that the primary driver is the differential heating of the Earth's surface. The equator receives more solar radiation (is heated more) than the poles. This temperature difference creates a pressure gradient. Warm air at the equator rises, and cooler air from the poles moves in to replace it, forming a single - cell circulation pattern.

• The tilt of the Earth (Option B) affects the seasons but is not the primary driver of the single - cell model.
• Specific heat differences (Option C) are more relevant in local or regional climate and weather patterns (e.g., land - sea breezes) rather than the large - scale single - cell model.
• Different day lengths at different latitudes (Option D) are related to the tilt of the Earth and the seasons, not the main mechanism for the single - cell model.

Answer:

A. Differential heating from the equator to the poles