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Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa), which is equivalent to 1,013.25 millibars, 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.
Learn what atmospheric pressure is, how it is measured, and how it affects weather and altitude. Find out the standard sea-level pressure and the units of atmospheric pressure.
- The Editors of Encyclopaedia Britannica
19. Okt. 2023 · An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit). One atmosphere is 1,013 millibars, or 760 millimeters (29.92 inches) of mercury. Atmospheric pressure drops as altitude increases.
Interactive map of global mean sea-level pressure based on ICON and GFS models. You can change time, units, animation speed, style and settings to explore atmospheric pressure patterns and trends.
27. Feb. 2024 · Barometric pressure, also known as atmospheric pressure, is a measurement of the air pressure in Earth's atmosphere. Learn how it is defined, measured and used to predict weather changes, and what are the normal and extreme ranges of barometric pressure.
29. Aug. 2013 · Atmospheric pressure is the force per unit area exerted by the weight of the atmosphere. To measure that weight, meteorologists use a barometer. It was Evangelista...
18. Dez. 2023 · Learn how air pressure is measured, affected by temperature and altitude, and related to weather systems. Explore the scientific units, examples, and lessons of air pressure.
