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TeachMeFinance.com - explain Atmospheric pressure Atmospheric pressure The term 'Atmospheric pressure' as it applies to the area of Earth observation can be defined as ' The amount of force exerted over a surface area, caused by the weight of air molecules above it. As elevation increases, fewer air molecules are present. Therefore, atmospheric pressure always decreases with increasing height. '. The term 'Atmospheric pressure' as it applies to the area of the weather can be defined as ' The pressure exerted by the earth's atmosphere at any given point, determined by taking the product of the gravitational acceleration at the point and the mass of the unit area column of air above the point'. The term 'Atmospheric pressure' as it applies to the area of reclamation can be defined as ' Pressure of air enveloping the earth, averaged as 14.7 psi at sea level, or 29.92 inches of mercury as measured by a standard barometer'. Previous 5 Terms: Atmospheric Boundary Layer Atmospheric Circulation Model Atmospheric crude oil distillation Atmospheric Infrared Sounder Atmospheric Lifetime Next 5 Terms: Atmospheric Radiation Atmospheric Radiation Measurements Program (ARM) atmospheric response variables Atmospheric shock wave atmospheric turbulence About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.