Renewables
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Differential Heating

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Differential heating also creates mountain and valley breezes. On warm, sunny days, the floor and slopes of a valley are heated. The heated air rises up the sides of the valley, creating a valley breeze. At night, the air in close proximity to the sides of the valley cools. The cooler air drains down slope in the valley, creating a mountain breeze.

Figure 4a. Differential heating--day. Onshore and offshore winds are caused by different rates of heating and cooling of land and water.
Figure 4a
Differential heating--day
Onshore and offshore winds
are caused by different
rates of heating and cooling
of land and water.
Click on image to see
animation.
Figure 4b. Differential heating--night. Onshore and offshore winds are caused by different rates of heating and cooling of land and water.
Figure 4b
Differential
heating--night
Onshore and offshore winds
are caused by different
rates of heating and cooling
of land and water.
Click on image to see
animation.