Why Does the Beach Breeze Change Direction in the Evening?

AI Thread Summary
The discussion centers on the phenomenon of beach breezes, specifically how temperature differences between sand and water affect air movement. During the day, sand heats up more than water, causing the air above the sand to rise due to convection, which creates a breeze blowing towards the shore as cooler air moves in from over the water. In the evening, the situation reverses; the sand cools quickly, becoming cooler than the ocean, leading to warmer air over the ocean rising and cooler air from the land moving out to replace it, resulting in a breeze blowing away from the shore. Additionally, there is a query regarding the formula for latent heat, with clarification sought on whether the formula l=Q/m represents latent heat or specific latent heat, which is confirmed as correct.
Phyzor
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Specific Heat Capacity help!

This question is simple but I'm a little confused, it involves beach breezses, temperature, and convection.

Sand on the beach get much hotter than water on sunny day so air above sand heats up and rise due to convection then cold air moves in from over water making the breeze blow TOWARDS shore right?

But why does the beach breeze move AWAY (reverse direction) from the shore later in the evening?
 
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Originally posted by Phyzor
But why does the beach breeze move AWAY (reverse direction) from the shore later in the evening?
Because being a good absorber of radiant heat means being a good radiator of heat. The ground cools quickly and gets cooler than the ocean. So the warmer (relatively) air over the ocean rises and the cooler air from the land moves out to replace it.
 
Thanx alot.:smile:

BTW is this the formula for LATENT HEAT or SPECIFIC LATENT HEAT: l=Q/m
rearanged: Q=m.l
 

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