What causes sea breeze? A) The difference in cloud cover between land and water. B) The difference in density between land and water C) The difference in elevation between land and water D) The difference in specific heat capacity between land and water

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The answer is D. The land heats up more rapidly during the daytime, than does the ocean. The air above the land has more heat energy than does the air above the ocean. This creates a pressure minimum above the land. The higher pressure cooler air from the sea, moves...

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The answer is D. The land heats up more rapidly during the daytime, than does the ocean. The air above the land has more heat energy than does the air above the ocean. This creates a pressure minimum above the land. The higher pressure cooler air from the sea, moves inland, creating a seabreeze. However, at night, as the temperature drops, there is a faster heat loss by the land, than by the ocean. Water retains heat longer than the land does. As a result, there will be a temperature difference. This will cause the air above the ocean to be warmer, than the air above the land. The air above the land, which has higher pressure, will move toward the warmer less dense air above the ocean, creating a land breeze.

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The sea breeze is caused by the difference in air above land and above the ocean. The air on land is warm, becauss it has land under it. Air above the ocean has nothing to warm it. When the air above the ocean goes onto land, it is cooler and this is the sea breeze.
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The correct answer to your question is B.  In the daytime the land surfaces become warmer than the connected water surfaces.  Due to the warmer surfaces the air over the land expands and therefore it becomes less dense. This causes the  pressure to become lower than the air pressure over the nearby water.

Because of the difference in the density of the air from land and sea, a sea breezes begin to blow toward the land from over the water.  This forces the warm air over the land to rise and cool.  Since there are no real  strong general winds, the air then flows toward the sea to replace air which has moved toward the land and this is the circulation cell.

"Sea breeze is a wind blowing from the water onto the land. Land breezes and sea breezes arise because of differential heating between land and water surfaces. Land and sea breezes can extend inland up to 100 mi (161 km) or manifest as local phenomena that quickly weaken with a few hundred yards of the shoreline. On average, the weather and cloud effects of land and sea breezes dissipate 20–30 mi (32–48 kph) inland from the coast."

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