![]() ![]() In response, a relatively colder, moister. ![]() General winds along an irregular or crooked. Daytime heating and nighttime cooling occur at about the same rate so the potential for the both land and sea breezes to be the same strength exist.īut at night the cooling ground inhibits vertical motion that, in turn, weakens the land breeze circulation, Nighttime cooling also produces a shallower change in temperature so land breeze circulation is shallower, and terrain, vegetation, and buildings inhibit the flow of air from land to water. During the day, differential heating over land and ocean surfaces creates an inlanddirected pressure gradient force. With an onshore general wind aloft, for example, there is no return flow in the daytime sea breeze circulation. Land breezes are weaker than sea breezes but not because of the difference in heating. Therefore, as the atmosphere seeks to reestablish equal pressure both onshore and offshore, two high-pressure to low pressure airflows develop the onshore flow aloft and surface offshore flow, called the land breeze. These differences in pressures over the water, both at the surface and aloft are greater than the differences in pressures over land at the same elevations over the water. As the air-cools, it begins to collect resulting in an increase in pressure, creating a “high”. We found that regardless of the type of LCZ at the meteorological station, the. Therefore, we comprehensively considered the effects of LCZ and sea-land winds on the day and night UHI, and analyzed the differences of the effect on different gradients. The rising air creates a weak low-pressure area due to a decrease in air mass at the surface. NUHII is the nighttime UHII and DUHII is the daytime UHII. However, unlike the sea breeze, the land breeze is usually weaker.Īt night, the land temperature falls to below that of the ocean and becomes less dense. They are most common during the fall and winter seasons when water temperatures are still fairly warm and nights are cool. ![]() Land breezes can occur when the land’s nighttime temperature is less than the sea surface temperature. Despite the difference in times at which the land breezes and sea breezes occur, the reason for the land breeze’s formation is the same as the sea breeze, just the role of the ocean and land is reversed. While sea breezes occur during the day, land breezes occur at night. The opposite of a sea breeze is a land breeze. Source: Mariners Learning System, by Captain Bob Figular Understanding Marine Weather – Land Breeze Your browser does not support JavaScript! While sea breezes occur during the day, land breezes occur at night. ![]()
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