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Topics related to "Atmospheric pressure"

isobar
isobar or isobaric line , line drawn on a weather map through points of equal atmospheric pressure. Isobars are used to define cyclones (low-pressure regions) and anticyclones (high-pressure regions). Weather maps are designed to depict the horizontal pressure distribution across an area of land... Read more
barograph
barograph instrument used to make a continuous recording of atmospheric pressure. The pressure-sensitive element, a partially evacuated metal cylinder, is linked to a pen arm in such a way that the vertical displacement of the pen is proportional to the changes in the atmospheric pressure. The pen ... Read more
vapor pressure
vapor pressure pressure exerted by a vapor that is in equilibrium with its liquid. A liquid standing in a sealed beaker is actually a dynamic system: some molecules of the liquid are evaporating to form vapor and some molecules of vapor are condensing to form liquid. At equilibrium the rates of t... Read more
decompression sickness
decompression sickness physiological disorder caused by a rapid decrease in atmospheric pressure, resulting in the release of nitrogen bubbles into the body tissues. It is also known as caisson disease, altitude sickness, and the bends. It is an occupational hazard of persons who work under greatly... Read more
manometer
manometer A device for measuring pressure differences, usually by the difference in height of two liquid columns. The simplest type is the U-tube manometer, which consists of a glass tube bent into the shape of a U. If a pressure to be measured is fed to one side of the U-tube and the other is open ... Read more
pressure
pressure in mechanics, ratio of the force acting on a surface to the area of the surface; it is thus distinct from the total force acting on a surface. A force can be applied to and sustained by a single point on a solid. However, a force can only be sustained by the surface of an enclosed fluid,... Read more
air lock
air lock compartment connecting two different environments, usually at different pressures, that enables personnel to transfer from one environment to the other. Space capsules have air locks to enable astronauts to move between the pressurized cabin and the near vacuum of space. A more common exam... Read more
STP
STP or standard temperature and pressure, standard conditions for measurement of the properties of matter. The standard temperature is the freezing point of pure water, 0°C or 273.15°K. The standard pressure is the pressure exerted by a column of mercury (symbol Hg) 760 mm high, often d... Read more
siphon
siphon , tube through which a liquid is lifted over an elevation by the pressure of the atmosphere and is then emptied at a lower level. To start the siphon, it must first be filled with the liquid before it is placed into position. The elevation over which a siphon will lift a liquid is limited by ... Read more
boiling point
boiling point temperature at which a substance changes its state from liquid to gas. A stricter definition of boiling point is the temperature at which the liquid and vapor (gas) phases of a substance can exist in equilibrium. When heat is applied to a liquid, the temperature of the liquid rises un... Read more

Encyclopedia entries related to "Atmospheric pressure"

Atmospheric pressure
Encyclopedia entry from: The Gale Encyclopedia of Science Atmospheric pressure The Earth ’...which it acts, is the atmospheric pressure. The atmospheric...measured gives the gas pressure. Anything else the...atmosphere we can detect atmospheric pressure. Atmospheric...
Atmospheric Pressure
Encyclopedia entry from: UXL Encyclopedia of Science Atmospheric pressure Earth's atmosphere consists of gases that surround the...force, divided by the area over which it acts, is the atmospheric pressure. The atmospheric pressure at sea level — considered the mean atmospheric...
atmospheric pressure
Book article from: World Encyclopedia atmospheric pressure Pressure exerted by the atmosphere because of its gravitational attraction...barometers and usually expressed in units of mercury. Standard atmospheric pressure at sea level is 760mm (29.92in) of mercury. The column...
atmospheric high pressure
Book article from: The Oxford Companion to the Earth atmospheric high pressure Areas of high pressure with central pressure in the range of 1020–45 mb (millibars), occasionally reaching 1060 mb, are known as anticyclones or highs . The isobars are more or less concentric and are widely...
atmospheric convergence and divergence
Book article from: The Oxford Companion to the Earth atmospheric convergence and divergence Atmospheric convergence refers to accumulation...centre of well-developed low-pressure systems, and, in the upper...additional component of convergence. Atmospheric divergence typically occurs...
Atmospheric circulation
Encyclopedia entry from: The Gale Encyclopedia of Science ...planet also contribute to of atmospheric circulation. As early as the...cell model was too simple. Atmospheric pressure and wind measurements taken...proposed a three-cell model for atmospheric circulation. Ferrell ’...
Atmospheric Circulation
Encyclopedia entry from: UXL Encyclopedia of Science Atmospheric circulation Atmospheric circulation is the movement...The driving force behind atmospheric circulation is solar energy...contribute to various features of atmospheric circulation. Wind cells...the warm rising air, low pressure develops at the equator...
circulation, atmospheric
Book article from: World Encyclopedia circulation, atmospheric In climatology, the movement of air in the troposphere...scale eddies, such as cyclones and anticyclones , low-pressure troughs and high-pressure ridges. Eddies are also caused by the Earth's rotation...
atmospheric temperature
Book article from: The Oxford Companion to the Earth atmospheric temperature In the atmosphere, temperature is one of the most sensitive...massive international effort yields detailed temperature (and wind and pressure) observations every few hours. Because many factors influence the temperature...
Pressure
Encyclopedia entry from: UXL Encyclopedia of Science ...objects causes gas pressure. Atmospheric pressure...be held up by air pressure at sea level. Atmospheric pressure is also...the lower the atmospheric pressure. Also...the lower the atmospheric pressure.

Dictionary entries related to "Atmospheric pressure"

atmospheric pressure
Book article from: A Dictionary of Ecology atmospheric pressure The downward force exerted by the weight...given horizontal cross-section. Pressure varies throughout the atmosphere...passage of depressions and anticyclones . Atmospheric pressure is measured in millibars...
atmospheric extinction
Book article from: A Dictionary of Astronomy atmospheric extinction The loss of starlight in passing through...contribute to extinction by Mie scattering . Atmospheric extinction is proportional to the airmass and the atmospheric pressure. At sea level and in a perfectly clear sky a...
atmospheric refraction
Book article from: A Dictionary of Astronomy atmospheric refraction The displacement in apparent...a degree). According to a simple atmospheric model, the refraction at zenith distances...but the exact figure depends on the atmospheric pressure, temperature, and humidity. See...
pressure potential
Book article from: A Dictionary of Biology pressure potential Symbol Ψ...potential due to the hydrostatic pressure that is exerted on water...cells there is a negative pressure potential, or tension...transpiration. Water at atmospheric pressure has a pressure...
ambient pressure
Book article from: A Dictionary of Ecology ambient pressure Atmospheric pressure in the surrounding air.
Amontons, Guillaume
Dictionary entry from: Complete Dictionary of Scientific Biography ...then became shortened as atmospheric pressure decreased and lengthened...thermometer independent of the atmospheric pressure. Air occupied the...no matter what the initial pressure. The following year Amontons...could reach an irresistible pressure as the result of a ...
Margules, Max
Dictionary entry from: Complete Dictionary of Scientific Biography ...theoretical analyses of atmospheric energy processes and deeply...between the partial vapor pressures and the composition of a binary liquid vapor pressures known as the Duhem-margules...solar semidiurnal barometric pressure oscillation, the universal...explanation for the genesis of ...
autoclave
Book article from: A Dictionary of Food and Nutrition ...temperatures can be achieved by using high pressure; the domestic pressure cooker is an example. At atmospheric pressure water boils at 100 °C; at 5 lb (35 kPa) above atmospheric pressure the boiling point is 109...
Titan
Book article from: A Dictionary of Astronomy ...substantial atmosphere, the surface atmospheric pressure being higher than on Earth...and carbon monoxide. The atmospheric pressure at Titan's surface...x2009;km, while layers of atmospheric haze exist up to 500 ...
Technology
Dictionary entry from: New Dictionary of the History of Ideas ...England had used previous "atmospheric" engines for draining mines...pistons that moved up by the pressure of the steam and down by the pressure of the atmosphere, in the...both directions only by the pressure of the steam. Like the electronic...

Thesaurus entries related to "Atmospheric pressure"

weather
Book article from: The Oxford American Writers Thesaurus ...noun  what's the weather like? synonyms : forecast, outlook; meteorological conditions, climate, atmospheric pressure, temperature; elements. • verb  we weathered the recession synonyms : survive, come through...

Related newspaper, magazine, and trade journal articles from HighBeam Research

Response of Regional Sea Level to Atmospheric Pressure Loading in a Climate Change Scenario
Magazine article from: Journal of Climate; 5/15/2008; ; 700+ words ; ...frequency changes in atmospheric pressure loading, η...response to increased atmospheric CO2 concentrations...studies is the surface pressure forcing, implying...However, a changing atmospheric circulation implies...
Japanese Inventor Develops Atmospheric Pressure Sensor
News Wire article from: US Fed News Service, Including US State News; 4/13/2007; 530 words ; ...control apparatus having two atmospheric pressure detecting systems as a...when a difference between atmospheric pressures detected by two sensors...Patent Office, said: "An atmospheric pressure estimating unit estimates...
Effects of global mean atmospheric pressure variations on mean sea level changes from TOPEX/Poseidon
Magazine article from: Journal of Atmospheric and Oceanic Technology; 9/1/1999; ; 700+ words ; ...related to atmospheric pressure. The inverse barometer...mean atmospheric pressure signal ECMWF atmospheric pressure fields...of the mean global atmospheric pressure. Figure...because variations in atmospheric pressure are larger...
Effects of Helium Atmospheric Pressure Plasma Treatment on Low-Stress Mechanical Properties of Polypropylene Nonwoven Fabrics
Magazine article from: Textile Research Journal; 11/1/2005; ; 700+ words ; ...are treated by He atmospheric pressure glow discharge plasma...used in atmospheric pressure plasma, because...investigate the effect of atmospheric pressure helium plasma...capacitively-coupled atmospheric pressure plasma system was...
Atmospheric pressure often dictates type of weather
Newspaper article from: The Milwaukee Journal Sentinel; 2/15/2002; ; 453 words ; Storm Team 4 Atmospheric pressure often dictates...When the air pressure is determined...This is done so pressure can be compared...results in rising atmospheric motions, which...causes downward atmospheric motions, which...
Meteorologist Ken Aucoin: "weighing in" on atmospheric pressure.(People to Discover)
Magazine article from: Odyssey; 11/1/2003; ; 700+ words ; ...lots of "high pressure" and "low pressure...weather? It's simple. Atmospheric pressure happens because...sinks, which makes atmospheric pressure higher, producing...created a difference in pressure. In the atmosphere...these changes In atmospheric pressure? Some ...
Atmospheric pressure helps in forecasting weather
Newspaper article from: The Milwaukee Journal Sentinel; 9/29/1998; ; 439 words ; The use of pressure in weather forecasting is very important. Atmospheric pressure is an important...changes. This is why the atmospheric pressure is almost always...slow-moving and dense atmospheric molecules near Earth's...
Microwave plasma-assisted heat treating and joining at atmospheric pressure: microwave atmospheric plasma technology can reduce cycle times and eliminate the need for costly vacuum equipment required by other low-pressure microwave technologies, enabling the development of new processes and materials.(Nonferrous Melting/Forming/Joining)
Magazine article from: Industrial Heating; 10/1/2005; ; 700+ words ; ...required by other low-pressure microwave technologies...cost and productivity pressures. The introduction of plasma at atmospheric pressure proved to be crucial...the use of reduced pressures to make the plasma...Using plasma at low pressure requires costly vacuum...treatment process ...
Atmospheric pressure plasma: Cleaning of aluminium. (Technology Update).
Magazine article from: Finishing; 3/1/2002; ; 700+ words ; ...has been treated by a novel atmospheric pressure non-equilibrium plasma system...surfaces. Keywords: aluminium, atmospheric plasma, contact angle, XPS...cleaning. (4) Additionally, atmospheric-pressure plasma processes...
Japanese Inventor Develops Atmospheric Pressure Sensor Failure Diagnosis Apparatus
News Wire article from: US Fed News Service, Including US State News; 4/7/2007; 544 words ; ...for diagnosing failure of an atmospheric pressure sensor in an engine control...permit specification of a failed atmospheric pressure sensor in an engine...difference between a first atmospheric pressure and a second atmospheric...