Listen to part of a lecture in a meteorology class.
Now, Earth’s atmosphere is sort of like a giant weather machine, right?
Uh...with air and water being its key component, a machine powered by energy from the Sun.
So we need to consider the role that air, or more specifically, wind, plays in this machine, so wind is really nothing more than moving air, right?
Now, as air is heated and becomes warmer, it expands, becomes less dense.
When air in a particular area is heated, you get a concentration of warm air in an area of low pressure.
Likewise, when you get a concentration of cold air, that air’s gonna be very dense, so it’s gonna create an area of high pressure.
If you have an area of high pressure next to an area of low pressure, the colder, high pressure air will start moving toward the area of low pressure. Right?
And the warmer air will move away, rising above the cooler air. Okay? Uh...yes. Linda?
So wind is actually generated by the Sun?
Well, Earth’s rotation plays a role, and there are other factors and we’ll come back to all that.