How does the atmospheric pressure change with the onset of a) cold weather; b) warm weather?

How does the atmospheric pressure change with the onset of a) cold weather; b) warm weather? Explain the reasons for the change in atmospheric pressure with a change in temperature.

a) with the onset of cold weather, the pressure rises because the air cools and becomes heavier and presses on the surface of the earth with greater force
b) with the onset of warm weather, the pressure becomes lower because the air heats up and becomes light and rising up does not exert strong pressure on the surface of the earth



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