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CA

Controlled Atmosphere

Related Terms

AIR BREATHER

A device permitting air movement between atmosphere and the component in/ on which it is installed.

ATMOSPHERE

Is the mixture of gases and water vapor surrounding the earth.

HAZE

Fine dust or salt particles in the air, too small to be individually apparent but in sufficient number to reduce horizontal visibility and give the atmosphere a characteristic hazy appearance which casts a bluish or yellowish veil over the landscape, subduing its colors. This is sometimes called a dry haze to distinguish it from damp haze, small water droplets or very hygroscopic particles in the air, smaller and more scattered than light fog.

ATMOSPHERIC PRESSURE

Pressure exerted by the atmosphere at any specific location. (Sea level pressure is approximately 14.7 pounds per square inch absolute.)

HYDROSPHERE

The water portion of the earth as distinguished from the solid part, called the LITHOSPHERE, and from the gaseous outer envelope, called the ATMOSPHERE

IONIZED LAYERS

Layers of charged particles existing in the upper reaches of the atmosphere as a result of solar radiation.

LAPSE RATE

The rate of decrease of temperature in the atmosphere with height, or, sometimes, the rate of change of any meteorological element with height.

ADVECTION

Transport of atmospheric properties solely by mass motion of the atmosphere. WIND refers to air motion, while ADVECTION refers more specifically to the transfer of any property of the atmosphere (temperature, humidity, etc.) from one area to another.

ASTRONOMICAL REFRACTION

Atmospheric refraction of a ray of radiant energy passing through the atmosphere from outer space, as contrasted with TERRESTRIAL REFRACTION of a ray emanating from a point on or near the surface of the earth. See also REFRAC- TION.

ATMOSPHERIC REFRACTION

Refraction resulting when a ray of radiant energy passes obliquely through the atmosphere. It may be called astronomical refraction if the ray enters the atmosphere from outer space, or terrestrial refraction if it emanates from a point on or near the surface of the earth.
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