Land-sea breeze is caused by the generally different temperatures of the land and the sea, which produce an across-coast air temperature contrast. During the day the wind blows landwards (sea breeze), and during the night it blows seawards (land breeze). Wind speeds associated with land-sea breeze are typically less than 5 m/s and the off-shore flowing air layer is often less than 100 m deep. Land breeze is often contaminated with stronger and deeper terrain-induced katabatic air flows. The intensity of land-sea breeze circulation is strong when the coastal land is dry and only lightly vegetated (Segal et al., 1988). The land-sea breeze system has several effects, among others, (1) it alters the direction and speed of the atmospheric boundary layer winds, (2) it influences the low-level stratiform and cumuliform clouds, (3) it initiates, suppresses and modifies precipitating convective storms, and (4) it recirculates and traps pollutants released into the air.
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