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Concept information

variable > atmospheric pressure

Preferred term

atmospheric pressure  

Definition

  • [NASA] 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. A column of air, 1 square inch in cross section, measured from sea level to the top of the atmosphere would weigh approximately 14.7 lb/in2. The standard value for atmospheric pressure at sea level is: 29.92 inches or 760 mm of mercury 1013.25 millibars (mb) or 101,325 pascals (Pa).

Broader concept

Entry terms

  • air pressure
  • barometric pressure

Scope note

  • US LTER controlled vocabulary

Creator

  • herbert.schentz@umweltbundesamt.at

In other languages

  • ατμοσφαιρική πίεση

    Greek

  • πίεση αέρα

URI

http://vocabs.lter-europe.net/EnvThes/22060

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