Mountain breezes typically form during the night. As the sun sets, the air in the valley cools more quickly than the air on the mountain, creating a temperature difference. This temperature difference causes the air to flow from the mountain down into the valley, creating a mountain breeze.
Breezes in valleys are formed because as the air warms during the day it rises along the slopes of the hills and mountains. As the warm air rises, cooler air is drawn in behind it causing a breeze.
During the day, the sun heats the mountain slopes, causing the air to rise due to convection currents. At night, the mountain cools faster than the surrounding air, creating denser air that flows down the slope due to gravity. This daily cycle of air movement is known as a mountain/valley breeze.
The high latent heat of water.
A hanging valley forms when a smaller glacier flows into a larger glacier, leaving the smaller valley elevated above the main valley floor after the larger glacier retreats. A cirque is created by the erosion of a mountain side by a glacier, resulting in a bowl-shaped depression. An arete is a sharp ridge formed between two cirques that erode toward each other. A horn is a pointed mountain peak that results from the glacial erosion of multiple cirques surrounding a summit, sharpening it into a distinctive shape.
Mountain breezes happen at night, valley breezes happen during the day.
Local winds
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Local winds
Mountain breezes typically form during the night. As the sun sets, the air in the valley cools more quickly than the air on the mountain, creating a temperature difference. This temperature difference causes the air to flow from the mountain down into the valley, creating a mountain breeze.
Mountain breezes are the breezes in which mountains give off oxygen and carbon to create moisture, then it flows down to the cities causing cold wind. Valley Breezes are the air trapped in the valleys below making its way to the top and spreading out to combine with the mountain breezes.
Some examples of local wind patterns include sea breezes, mountain breezes, and valley breezes. Sea breezes occur when cooler air from the sea moves inland during the day, while mountain breezes are caused by cool air descending at night from mountains. Valley breezes occur when warm air rises in the daytime from a valley floor.
Local winds
A valley breeze flows up a valley or mountain slope.A mountain breeze blows down a mountain slope.For more information see the answers to the Related Questions shown below.
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Valley breezes and mountain breezes are considered convection currents because they result from the differential heating and cooling of the air in these geographic features. During the day, the sun heats the valley or mountain slope, causing the air to rise and create an upslope breeze (valley breeze). At night, the land cools faster than the air, resulting in the air sinking and flowing down the slope (mountain breeze). This cycle of warm air rising and cool air sinking is characteristic of convection currents.
Mountain and valley breezes are other examples of local winds caused by an area's geography. Campers in mountains areas may feel warm afternoon quickly change into cold night soon after the sun sets. During the day, the sun warms the air along the mountain slopes. This warm air rises up the mountain slopes, creating a valley breeze. At nightfall, the air along the mountain slopes cools. This is cool air moves down the slopes into the valley, producing a mountain breeze.