![]() The intensity of the breeze depends on how big the gap in temperature and pressure is between the two places. The wind then blows from the land out to sea. This event takes place during the day, because at night the sea surface can be warmer than the land surface, so that the pressure over the sea will be lower than in the cooler inland areas, where it will be higher. In a situation of coastal breezes, as the pressure on land is low and the pressure over the sea is high, the air is set in motion, always moving from the areas where the pressure is higher towards the areas where it is lower. Wind, which is air moving parallel to the surface, originates when there is a pressure difference between two points. In inland regions where this occurs, a low thermal pressure area is then created while over the sea, which is cooler, the air cannot rise and what is created is a high pressure area. It therefore becomes lighter, and is forced to rise (convective upwelling). The ground heats up faster and more efficiently, and the air in contact with it also heats up, losing density and pressure. ![]() How is sea breeze formed?ĭuring the daytime in spring and summer the sun’s heat warms both surfaces, but for an equal share of the heat received, it takes much longer to raise the temperature of seawater than that of the ground. This is most likely sea-breeze, a (pleasant) phenomenon that occurs due to the temperature difference between the sea surface and the land surface. If you are on the beach (or somewhere near the coast) you may have noticed that around midday a gentle wind starts to blow from the sea where there was none before.
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