Why is the mountain valley wind stronger in summer and weaker in winter?
The cause of wind is the air pressure difference caused by uneven heating between regions. The greater the temperature difference, the greater the pressure difference, the greater the horizontal pressure gradient force and the stronger the wind force. The influence of topography on temperature is mainly reflected in the higher the altitude, the smaller the temperature difference.
Its impact:
The impact on agricultural production: on sunny days, the wind from the valley sends warm air to the mountain, which raises the temperature on the mountain and promotes the early germination, flowering, fruiting and ripening of crops and fruit trees on the hillside; It can also reduce the chill in winter.
The valley wind brings water vapor to the top of the valley, which increases the air humidity in the mountains and reduces the air humidity in the valley. This phenomenon is especially obvious at noon. If there is enough water vapor in the air, the summer breeze will often condense clouds and cause rainfall, which is very beneficial to the growth of trees and crops in mountainous areas;
At night, the mountain wind brings the water vapor from the mountain to the valley, so the air humidity in the mountain decreases and the air humidity in the valley increases. In the growing season, mountain breeze can reduce the temperature, which is very beneficial to the accumulation of nutrients in plants and the growth and expansion of root and tuber plants.