atmosphere

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Related to tropopause: stratosphere

atmosphere

 [at´mos-fēr]
1. the entire gaseous envelope surrounding the earth and subject to the earth's gravitational field.
2. the air or climate in a particular place. adj., atmospher´ic.
3. a unit of pressure, being that exerted by the earth's atmosphere at sea level; equal to 1.01325 × 105pascals (approximately 760 mm Hg). Abbreviated atm.

at·mos·phere

(at'mŏs-fēr),
1. Any gas surrounding a given body; a gaseous medium.
See also: standard atmosphere, torr.
2. A unit of air pressure equal to 101.325 kPa.
See also: standard atmosphere, torr.
[atmo- + G. sphaira, sphere]

atmosphere

/at·mos·phere/ (at´mos-fēr)
1. the entire gaseous envelope surrounding the earth and subject to the earth's gravitational field.
2. the air or climate in a particular place.
3. a unit of pressure, being that exerted by the earth's atmosphere at sea level; equal to 1.01325 × 105pascals (approximately 760 mm Hg). Abbreviated atm.

atmosphere (atm)

[at′məsfir]
Etymology: Gk. atmos, vapor, sphaira, sphere
1 the natural body of air covers the surface of the earth. It is composed of approximately 20% oxygen, 78% nitrogen, and 1% argon and other gases, including small amounts of carbon dioxide hydrogen, and ozone as well as traces of helium, krypton, neon, and xenon and varying amounts of water vapor.
2 an envelope of gas, which may or may not duplicate the natural atmosphere in chemical components.
3 a unit of gas pressure that is usually defined as being equivalent to the average pressure of the earth's atmosphere at sea level, or about 14.7 pounds per square inch or 760 mm Hg. atmospheric, adj.

at·mos·phere

(at'mŏs-fēr)
1. Any gas surrounding a given body; a gaseous medium.
2. A unit of air pressure equal to 101.325 kPa.
See also: standard atmosphere
[atmo- + G. sphaira, sphere]

atmosphere

the gaseous envelope surrounding a particular body such as the earth, or the gaseous content of a given structure or container.

Atmosphere

A measurement of pressure. One atmosphere equals the pressure of air at sea level (14.7 pounds per square inch [psi]).

atmosphere (atm),

n the natural body of air, composed of approximately 20% oxygen, 78% nitrogen, and 2% carbon dioxide and other gases.
References in periodicals archive ?
This is our first opportunity to sample the tropopause region during winter in the northern hemisphere when it is coldest and extremely dry air enters the stratosphere," he said.
To reach a jet airplane's maximum altitude, accelerate to maximum speed at the tropopause in straight and level flight, as in a speed run.
The extra weight is needed for the balloon to safely ascend through the tropopause (between 40,000 and 50,000ft).
Instead, he and Ingersoll believe, the sound waves come from Jupiter's tropopause, a region just below the stratosphere and above the ammonia clouds.
One consequence of downward motion is a phenomenon called tropopause fold, in which a tongue of dry, ozone-rich air from the stratosphere intrudes into the troposphere below.
The Airborne Tropical Tropopause Experiment campaign focuses on the region of the upper atmosphere where pollutants and other gases enter the stratosphere and potentially influence our climate.
According to the researchers, if very deep clouds, such as those in a tropical cyclone that can rise through the atmosphere at speeds of up to 40 miles per hour, can punch through the tropopause, they can deposit their ice in the warmer overlying stratosphere, where it then evaporates.
NASA's Airborne Tropical Tropopause Experiment (ATTREX) will look at how these gases influence Earth's climate, ozone layer and energy budget.
The tropopause is a transitional layer that sits between the troposphere, the layer closest to the earth in which weather systems occur, and the stratosphere, where the ozone layer is located.