dry adiabatic lapse rate: the rate at which an unsaturated parcel of air will decrease in temperature as it moves through the atmosphere. The rate is a decrease of about 9.767°C per kilometer upwards.
Dry adiabatic lapse rate Rising unsaturated (clear) air parcels cool at the rate of about 10 Celsius degrees per 1000 m of uplift (or 5.5 Fahrenheit degrees per 1000 ft).
Dry Adiabatic Lapse Rate
The rate at which the temperature of a parcel of dry air decreases as the parcel is lifted in the atmosphere. The dry adiabatic lapse rate (abbreviated DALR) is 5.5?Ǭ?F per 1000 ft or 9.8?Ǭ?C per km.
Dry Crack ...
dry adiabatic lapse rate—The rate of decrease of temperature with height when unsaturated air is lifted adiabatically (due to expansion as it is lifted to lower pressure). See adiabatic process.
Dry Adiabatic Lapse Rate
NOAA National Weather Service - Cite This Source - This Definition ...
Dry adiabatic lapse rate - the rate of temperature change for dry (unsaturated) air moving vertically. The temperature will change by 5.4°F per 1000 feet or 9.8°C per kilometre.
Dry Adiabatic Lapse Rate
The rate at which the temperature of unsaturated air changes as it ascends or descends through the atmosphere. Approximates to some 10 degrees Celsius per kilometre.
Dust Devil ...
The dry adiabatic lapse rate (DALR) is the rate at which a rising parcel of unsaturated air, such as a thermal, will lose temperature. Unsaturated air has less than 100% relative humidity, ie it is below its dew point.
DALRDry Adiabatic Lapse RateDamIn hydrologic terms, any artificial barrier which impounds or diverts water. The dam is generally hydrologically significant if it is:
1.
absolutely unstable airAn atmospheric condition that exists when the environmental lapse rate is greater than the dry adiabatic lapse rate.
The moist adiabatic lapse rate (abbreviated MALR) is not a constant like the dry adiabatic lapse rate but is dependent on parcel temperature and pressure.
The dry adiabatic lapse rate is about 5.5 degrees F per 1000 feet, and the wet adiabatic lapse rate varies between 2 and 5 degrees F per 1000 feet.
As air rises up the western side of the Great Dividing Range it cools at the dry adiabatic lapse rate (DALR).
Adiabatic Lapse Rate of Dry Air:The dry adiabatic lapse rate of dry air is 5 Degs. F or 3 Degs. C. per 1,000 ft.
Adiabatic Lapse Rate of Moist Air:The moist adiabatic lapse rate is 3.0 Degs. F or 1.5 Degs. C. per 1,000 ft.
When the lapse rate of a column of air is greater than the dry adiabatic lapse rate. The term absolute is used because this applies whether or not the air is dry or saturated.
Related term: instability
ABSOLUTE TEMPERATURE SCALE ...
An atmospheric condition that exists when the environmental lapse rate is greater than the dry adiabatic lapse rate.
Absorption
The process in which incident radiant energy is retained by a substance by conversion to some other form of energy.
ABSOLUTE INSTABILITY
When the lapse rate of a column of air is greater than the dry adiabatic lapse rate. The term absolute is used because this applies whether or not the air is dry or saturated.
Related term: instability ...
Convective temperature - The temperature to which air must be heated to generate convection solely by heating. The air will have a dry adiabatic lapse rate from the surface to the LFC.
if the air is unsaturated (air temperature > dew point temperature), the cooling/warming will be at a rate of 3 degC per 1000 ft (or 10 degC per 1 km): This is known as the Dry Adiabatic Lapse Rate/DALR; ...
The adiabatic lapse rate (or dry adiabatic lapse rate) is the normal rate of change (9.8 degrees C/km) for a dry parcel of air that is moved up or down and cools or warms as the pressure changes. The wet (moist) adiabatic lapse rate (4.
 See also: Adiabatic, Water, Temperature, Atmosphere, Dry Adiabat
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