Mountain-valley breezes are caused by

Question

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During the day, the sun heats the mountainside and causes the air to rise up the slope, which is called upslope flow. This creates a lower pressure at the mountain's summit, and cooler air flows down the mountain slope to fill the lower pressure area, which is called downslope flow. At night, the mountain surface temperature decreases, and the mountain air cools and descends the slope, creating a higher pressure area. The cooler air from the valley, having a higher pressure than the mountain air, flows upslope to fill the void, which creates a valley breeze. The cycle repeats daily, creating mountain-valley breezes.

Mountain-Valley Breezes Are Caused by