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Topical Terminology > Adiabatic Lapse Rate



2 Definitions

Adiabatic Lapse Rate

For Adiabatic Lapse Rate we have terms and definitions in 2 topics. The topics are Atmospheric Chemistry and Aviation.



Adiabatic Lapse Rate (Atmospheric Chemistry)

The rate of decrease of temperature with increasing altitude in the atmosphere. If heat is neither gained nor lost from the air parcel under consideration, then the lapse rate is said to be adiabatic.[Graedel, T.D. and Paul Crutzen. Atmospheric Change: an Earth system perspective; 1993; Freeman Press


Adiabatic Lapse Rate (Aviation)

The rate at which ascending air cools and descending air warms, given no heat is added or taken away. The rate for dry air is based on 5.4° F per 1000' altitude (1° per 100 meters); saturated rates vary with barometric pressures and temperatures, and must be adjusted for accuracy.


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