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How does atmospheric pressure change with height in the atmosphere?why does it change?

March 11th, 2010 by , under nnmj.com.

  • The atmospheric pressure reduces with height.The reason is given below.
    Air has weight.The weight or force exerted by the air on unit area of a surface is termed as pressure.The pressure of the atmosphere at any level is thus defined as the weight of the overlying column of air over unit area at that level.As you go up the length of this air column becomes less and hence the weight of the air column also becomes less.So the pressure also becomes less.Thus the atmospheric pressure decreases with height.


  • Let's start with the basics. The atmosphere is composed of a mixture of gases of varying weights. These gases, while you may not notice it in everyday activity, do have mass. The atmospheric pressure is, basically, the weight of all the gases above a certain point on the earth. So at sea level, you would have an atmosphere's height of air pushing down on you in a column. Now as you progress higher into the atmosphere, you have less of the gases of the atmosphere above you, and therefore less weight pushes down on you. This is why atmospheric pressure decreases with height. It's a very rough explanation I know, but I hope it helps.







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