MOIST ADIABAT The line on a Skew T-Log P chart that depicts the change in temperature of saturated air as it rises and undergoes cooling due to adiabatic expansion. As saturated air rises, the temperature changes at a rate of 0.
Moist Adiabats They show how the air temperature would change inside a rising parcel of saturated air.
Moisture Advection Transport of moisture by horizontal winds.
moist adiabatic lapse rate: the decrease in temperature as a saturated parcel of air moves up through the atmosphere. This rate is 0.55°C per 100 meters.
Moist adiabatic rate The rate of change of temperature in a rising or descending saturated air parcel. The rate of cooling or warming varies but a common value of 6ºC per 1000 m (3.3ºF per 1000 ft) is used.
Moist Adiabatic Lapse Rate
(abbrev. MALR)- The rate at which the temperature of a parcel of saturated air decreases as the parcel is lifted in the atmosphere.
Moist adiabatic lapse rate A variable rate of cooling applicable to saturated (cloudy) air parcels that are ascending within the atmosphere.
Moist adiabatic lapse rate - the rate of temperature change for saturated air.
Environmental lapse rate - the rate of temperature change actually measured in the atmosphere.
Neutral StabilityAn atmospheric condition that exists in unsaturated air when the environmental lapse rate equals the dry adiabatic rate, or in saturated air when the environmental lapse rate equals the moist adiabatic rate.
absolutely stable airAn atmospheric condition that exists when the environmental lapse rate is less than the moist adiabatic lapse rate.
If the environmental lapse rate is less than the moist adiabatic lapse rate, the air is absolutely stable -- rising air will cool faster than the surrounding air and lose buoyancy.
latent instability"Atmospheric conditions above the level of free convection when the lapse rate is steeper than moist adiabatic; has been used more as a quantitative measure than a qualitative condition.
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.
Adiabatic Process: The change in volume or pressure without the loss or gain of heat.
An atmospheric condition that exists when the environmental lapse rate is less than the moist adiabatic lapse rate.
Absolutely Unstable Air ...
Moist Adiabatic Rate (MAR): if the rising air has reached the dew point, then condensation will continue as the air rises. Since condensation liberates latent heat of condensation, the cooling rate is not as fast, only 6 °C/1000 m.
its pressure decreases and its temperature falls due to the expansion of the air parcel. When an air parcel is unsaturated and rises, then the temperature decreases at a rate of 1°C per 100 meters (5.5°F per 1,000 feet). Related term: moist adiabat ...
Contrast with a moist adiabat. DRY BULB THERMOMETER A thermometer used to measure the ambient temperature. The temperature recorded is considered identical to air temperaure. One of the two therometers that make up a psychrometer.
 See also: Water, Air, Atmosphere, Meteor, Temperature
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