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Definition: Atmospheric Pressure |
Atmospheric PressureNoun1. The pressure exerted by the atmosphere. Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. |
| Domain | Definition |
Energy | The pressure of the air at sea level; one standard atmosphere at zero degrees centigrade is equal to 14.695 pounds per square inch (1.033 kilograms per square centimeter). (references) |
Health | The pressure at any point in an atmosphere due solely to the weight of the atmospheric gases above the point concerned. (references) |
Mechanical Engineering | The pressure exerted by the column of air in the atmosphere above the reference point. Source: European Union. (references) |
Public Administration | The pressure that the atmosphere exercices over the earth's surface; It varies according to the latitude, altitude and to meteorological conditions, but normally stands at 76 cm of mercury at 0°C at sea level; Standard Temperature and Pressure; It has a force of 17. 000 HP on a man of normal size. Source: European Union. (references) |
Science | 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). (references) |
Solar | The pressure (force per area) created by the weight of the atmosphere. At higher elevations, the atmospheric pressure is lower because there is less air. (references) |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
Atmospheric pressure is the pressure caused by the weight of air above any area in the Earth's atmosphere. Standard atmospheric pressure (atm) is discussed in the next section.
Air masses are affected by the general atmospheric pressure within the mass, creating areas of high and low pressure.
As elevation increases, fewer air molecules are present. Therefore, atmospheric pressure always decreases with increasing height according to the following relationship (only a first-order approximation):
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. A 1 m2 column of air would weigh about 10 tonnes.
Standard atmospheric pressure or "the standard atmosphere" (1 atm) is defined as 101,325 pascals. (see also Standard temperature and pressure)
This can also be stated as:
In a low atmospheric pressure system the atmospheric pressure of the air mass is lower than that of the surrounding air. Low atmospheric pressure systems are symbolized by an L on a weather map and are associated with areas of storminess and precipitation. Wind movement is cyclonic around a low pressure system and cold fronts and warm fronts are generally connected to them.
In a high atmospheric pressure system the atmospheric pressure of the air mass is higher than that of the surrounding air. High atmospheric pressure systems are symbolized by an H on a weather map and are associated with areas of clear weather.
It is possible to demonstrate atmospheric pressure in a classroom or home environment using the crushing can experiment. See Atmospheric pressure demo
See also : plenum
Standard atmospheric pressure
This "standard pressure" is a purely arbitrary representative value for pressure at sea level, and real atmospheric pressures vary from place to place and moment to moment everywhere in the world.External Links
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Atmospheric pressure."
Synonym: Atmospheric PressureSynonym: air pressure (n). (additional references) |
| Domain | Title |
Books | |
Source: compiled by the editor from various references; see credits. | |
| Thumbnail | Description & Credit | Thumbnail | Description & Credit |
 | Atmospheric pressure display at 3,000 feet relative to eye of Hurricane Greta. Credit: Flying With NOAA. |  | [Experiments on atmospheric pressure and vacuum chambers]. Credit: National Library of Medicine. |
Source: pictures compiled by the editor from various references; see picture credits. | |||
Expression using "atmospheric pressure": below atmospheric pressure. Additional references. | |
| Source: compiled by the editor from various references; see credits. |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
atmospheric pressure | 94 |
altitude atmospheric pressure | 8 |
atmospheric pressure standard | 3 |
atmospheric pressure wind | 2 |
air atmospheric pressure | 2 |
atmospheric pressure psi | 2 |
| Source: compiled by the editor from various references; see credits. | |
| Language | Translations for "atmospheric pressure"; alternative meanings/domain in parentheses. | ||||||||||||||||||||||||||||||||||
Chinese | 氣" (barometric pressure). (various references) | ||||||||||||||||||||||||||||||||||
Danish | atmosferisk tryk, atmosfaeretryk, atmosfærisk tryk, atmosfæretryk, lufttryk. (various references) | ||||||||||||||||||||||||||||||||||
Dutch | atmosferische druk (standard atmosphere), luchtdruk (air-pressure), dampkringsdruk. (various references) | ||||||||||||||||||||||||||||||||||
Finnish | ilmanpaine. (various references) | ||||||||||||||||||||||||||||||||||
French | pression atmosphérique. (various references) | ||||||||||||||||||||||||||||||||||
German | atmosphaerischer Druck, Atmosphaerendruck, atmosphärischer Druck, Luftdruck (air pressure, air-pressure), Luftdichte. (various references) | ||||||||||||||||||||||||||||||||||
Greek | ατμοσφαιρική πίεση (air pressure). (various references) | ||||||||||||||||||||||||||||||||||
Hungarian | légköri nyomás. (various references) | ||||||||||||||||||||||||||||||||||
Italian | pressione atmosferica. (various references) | ||||||||||||||||||||||||||||||||||
Japanese Kanji | 気圧 , 大気圧 . (various references) | ||||||||||||||||||||||||||||||||||
Japanese Katakana | たいきあつ, きあつ (steam pressure). (various references) | ||||||||||||||||||||||||||||||||||
Pig Latin | atmosphericay essurepray pressão atmosférica (barometric pressure). (various references) атмосферное давление (atmosphere pressure, barometric pressure). (various references) presion atmosférica, presión atmosférica (air pressure, barometric pressure). (various references) lufttryck (air pressure, air-pressure). (various references) atmosferik basınç, atmosfer basıncı (barometric pressure). (various references) | ||||||||||||||||||||||||||||||||||
Misspellings | |
"Atmospheric Pressure" is suggested in spellcheckers for the following: atomospheric pressure. (additional references) | |
| Source: compiled by the editor, based on several corpora (additional references). | |
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "a-c-e-e-e-h-i-m-o-p-p-r-r-r-s-s-s-t-u" | |
-5 letters: proprietresses, treasurerships. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
| 1. Definition 2. Synonyms 3. Crosswords 4. Usage: Commercial | 5. Images: Slideshow 6. Images: Photo Album 7. Expressions 8. Expressions: Internet | 9. Translations: Modern 10. Derivations 11. Anagrams 12. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
