Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

atmospheric pressure




atmospheric pressure
Image courtesy University of Illinois WW2010 Project
The force per unit area at any point in an atmosphere due to the weight of atmospheric gases above it. Atmospheric pressure is measured in millibars, bars, or atmospheres. The standard atmospheric pressure at the surface of the Earth is 1,013 mb. On Venus the surface pressure is about 90,000 mb (90 bars), while on Mars it is about 7.5 mb.


Related category

   • ATMOSPHERIC PHENOMENA AND STRUCTURES