In meteorology, a departure from the usual decrease or increase with altitude of the value of an atmospheric property. This term is almost always used to refer to a temperature inversion, an atmospheric condition in which the temperature increases with increasing altitude.

Related Terms

AIR COOLER

A factory-encased assembly of elements whereby the temperature of air passing through the device is reduced.

CLEAN ROOM

A facility or enclosure in which air content and other conditions (such as temperature, humidity, and pressure) are controlled and maintained at a specific level by special facilities and operating processes and by trained personnel.

ABSOLUTE ZERO TEMPERATURE

Temperature measured from absolute zero (-459.67°F, or -273.16°C).

AIR REHEATING

In an air conditioning system, the final step in treatment, in the event the temperature is too low.

ANAEROBIC

A condition in which 'free' or dissolved oxygen is not present in the water.

CLOUD POINT

The temperature at which waxy crystals in an oil or fuel form a cloudy appearance.

ABSOLUTE TEMPERATURE SCALE

A scale of temperature measurement in which zero degrees is absolute zero.

CARBON RESIDUE

Coked material remaining after an oil has been exposed to high temperatures under controlled conditions.

REFRIGERATOR

A device to transfer heat from a low temperature to a high temperature medium.

COMPRESSED AIR

Air at any pressure greater than atmospheric pressure.

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