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Does cold air masses have higher air pressure than warm air masses?

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January 17, 2012 11:48PM

Yes. Cold air masses have higher density, because the molecules are closer together. That makes them have higher pressure because there is more mass per unit volume pressing down.

The molecules are closer together because they are colder, and, with less energy, which is the same as temperature, they vibrate less, so that causes them to move closer together.