Question

In coastal area, wind current moves from the sea towards the land during day; but during night it moves from land the sea. Discuss the reason.

Answer 1

During daytime, land gets heated faster than the water bodies. Consequently, air above the land surface gets heated faster than the air present above the water surface. The heated air on land surface starts rising. A region of low pressure is created on land surface resulting in the movement of the air above the sea towards the low pressure area on land. Thus, wind current moves from the sea towards the land during day.
The situation in night is just reverse. At night both land and sea cool down but water cools slower than land. The air above the water is warmer than the air above the land surface, and it rises up creating a region of low pressure above sea. So, wind current moves from the land towards sea during night.