Sea and Land Breezes

LAND BREEZE

The land breeze develops during the night is slight, reaching Force 1-2. With clear skies the radiative cooling of the land surface is at a maximum, but the sea surface temperature decreases slowly. Above the land the air cools, becomes denser (5) and develops a high pressure. The air, heated by the warmer sea surface, ascends (7) and develops relatively low pressure and hence creating the land breeze. Land breezes are normally evident by midnight local time, but on occasions may not develop until the early hours of the morning. It should be noted that the small temperature difference at night between land and sea surfaces, and the topography of the land, both influence the speed of the land breeze. In tropical areas the convective process (6 + 7) is marked by the development of cumuliform cloud over the sea.

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