bald eagle
bald eagle
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.
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.
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.
The answer is 7
because the air warms as it moves down
During the day, warm air rises up the mountain slopes, creating anabatic winds blowing up the valley. At night, cold air descends down the slopes, creating katabatic winds blowing down the valley. This diurnal pattern of wind movement is typical in mountain-valley systems.
After sunset the sun is no longer warming the mountain side and there is cooling of the air along the slope. The air becomes more dense and sinks into to valley. Thus the wind blows from the mountain side down into the valley and is thus called a mountain breeze.
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.
If you were standing in a valley, you would likely experience a local wind phenomenon known as a valley breeze during the day. As the sun heats the valley floor, the air near the ground warms up, becomes less dense, and rises, creating a low-pressure area. Cooler air from the surrounding higher terrain then moves down into the valley to replace the rising warm air, resulting in a gentle breeze flowing up the valley. At night, this can reverse, leading to a mountain breeze as cooler air drains down from the mountains into the valley.
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.
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.