lapse rate

(redirected from Adiabatic lapse)
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lapse rate

[′laps ‚rāt]
(meteorology)
The rate of decrease of temperature in the atmosphere with height.
Sometimes, the rate of change of any meteorological element with height.

lapse rate

The rate of decrease of an atmospheric variable with height. However, the term normally refers to the fall of temperature with height. The three types of lapse rates referred to in meteorology are dry adiabatic lapse rate, saturated adiabatic lapse rate, and environmental lapse rate. See also dry adiabatic lapse rate, saturated adiabatic lapse rate, and environmental lapse rate.
References in periodicals archive ?
Marquet, 2012: Moist-entropic vertical adiabatic lapse rates: The standard cases and some lead towards inhomogeneous conditions.
In addition to the dry adiabatic lapse rate used in question 9, there is the wet adiabatic lapse rate for saturated air, which cools at a rate of about 2 degrees C per 1,000ft.
During the afternoon it's common for the environmental lapse rate to approach the dry adiabatic lapse rate (DALR) in the first few thousand feet of the surface (left).
This excerpt below is a good example of a fairly deep, saturated layer that is approaching the moist adiabatic lapse rate (MALR).
According to rule number three, if a saturated parcel is lifted, it is assumed to remain saturated and will cool off at the moist adiabatic lapse rate.
It is also typically unstable in the dry air below the cloud deck as well, with lapse rates normally approaching the dry adiabatic lapse rate.
The lapse rate above and below these altitudes suggest the potential for turbulence due to a nearly dry adiabatic lapse rate (3 degrees per 1,000 feet).

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