General Question

bobmrock's avatar

What creates wind?

Asked by bobmrock (1 points ) September 19th, 2008
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5 Answers

damien's avatar

Changes in temperature. According to wikipedia:

“It occurs as air is heated by the Sun and thus rises. Cool air then rushes to occupy the area from which the hot air has just moved.”

Les's avatar

I’ll try to answer this quickly. The temperature thing is true, but what you describe above is density change. What I like to think of is a change in pressure. Imagine you are holding a balloon filled with air. When you let go of the balloon, the air from inside the balloon rushes from inside the rubber to outside. The pressure in the balloon was higher than outside (high to low), thus causing the stream of air coming out of the balloon, or wind. This is just what happens in our atmosphere. There are high and low pressure areas, and the wind you feel is air moving from the high to the low areas.

Randy's avatar

In a cartoon I watched, there was a cloud blowing air from his mouth and that is what made the wind. In the same cartoon, a character fell from a many miles high cliff and survived so I don’t know how factual my statement is.

big3625's avatar

Sometimes indigestion causes wind to come out of the back side of people in the form of gas pressure buildup created from the food we eat. This kind of wind is most often a methane gas and is a kind of wind that is not very desirable to the human nose.

Poser's avatar

It’s actually both what Damien and Les said. The uneven heating of the atmosphere causes changes in the density of the air. There are all manners of how this actually creates wind.

In coastal areas, for instance, since land heats and cools much faster than water, you get sea and shore breezes. When the sun comes up, the land heats up much faster than the sea, which, in turn, heats the air over the land much faster than the air over the sea. As the air heats, it becomes less dense, which means that it rises. As this heated air rises, the pressure at ground level is lowered. The differential between the lower pressure over land and the higher pressure over water causes air to be “sucked” onto shore. This is a sea breeze.

When the sun goes down, the land cools much faster than the water, and the opposite happens. This is a shore breeze.

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