Local Wind Formation

Local Wind Formation
Have you ever wondered why the wind was blowing? The answer to your question is rather simple. There are three main key concepts that are involved, and they are convection, radiation, and conduction.
Convection is one of the key concepts for local winds. When air or liquid is heated up to a certain temperature it will become less dense. As a general principle in physics, matter with less density will tend to rise. However once it reaches a certain height it will cool down, and then sink again. For example take a boiling pot of water on the stove. The heated water will turn into water vapor and rise once it meets with air; it cools down and starts to sink again.
Radiation is the process in which an object is heated up indirectly by another source of heat. For example think about when you and your family have a summer grill. From even a good distance away you can feel the heat. Another example is a campfire you can feel its heat from a long distance away. This is known as radiation.
Conduction is when heat is felt only after contact is made. For example if you have ever removed cake from the oven and burnt your hand, then you probably know conduction.
We humans are land creatures and on land we have to deal with all of Earth’s air pressure. Right now on a general basis you carry around at least 2,208,000 tons. As you go higher into earth’s sky you have to deal with less air pressure. For example when you go in an airplane as the plane takes off your ears start to pop. The reason that this happens is because you are changing very rapidly from areas of high pressure to areas of low pressure.
The suns radiation causes abnormal heating patterns in different Earthly masses. For example water tends to heat up slower than soil, but also cools down slower. Now pretend you are sitting by a lake side on a hot summer day. The spot that you sat on was so hot that you had to put down a blanket. However the water is rather cold. Every now and then there are cool breezes, what is going on?
The heated sand that you are sitting on got heated by the sun through radiation. The heated sand causes the air around it to get hot. Since the air is less dense, it rises entering low pressure areas. After it has entered low pressure areas in the atmosphere it also experiences cold temperature in the atmosphere which makes it dense again. Then when it falls, and experiences high pressure regions and ends up at the lake. However air usually likes low pressure areas so it moves to the land mass. The movement from water to land is the wind. Something to help you remember it would be the saying “High to low is the natural flow”.

Ravi Y
Sources:: Foss books, weather and water
http://en.wikipedia.org/wiki/Wind

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