Lifting by Convergence broad lifting of an entire layer of air
Convergence is an atmospheric condition that exists when there is a horizontal net inflow of air into a region.
Lifting Index Northeast United States.
Lifting Index Southeast United States
Lifting Index North Central United States.
Lifting Condensation Level (LCL) - the level in the atmosphere at which an unsaturated air parcel lifted dry adiabatically would become saturated. See convective condensation level (CCL).
LIFTING CONDENSATION LEVEL (LCL) The height at which a parcel of moist air becomes saturated when it is lifted dry adiabatically.
Lifting Condensation Level (LCL) It is the height at which a parcel of air becomes saturated when lifted dry-adiabatically.
Lightning A sudden visible flash of energy and light caused by an electrical discharges from thunderstorms.
Lifting condensation level (LCL) The altitude to which air must be lifted so that expansional cooling leads to condensation (or deposition) and cloud development; corresponds to the base of clouds.
lifting condensation level (abbreviated LCL)—The level at which a parcel of unsaturated air lifted dry-adiabatically would become saturated. Compare level of free convection and convective condensation level.
Lifting Condensation Level - The level in the atmosphere where a lifted air parcel reaches its saturation point, and as a result, the water vapor within condenses into water droplets.
Frontal lifting: The forced lifting of warm, less dense air over colder air in the vicinity of a front.
Front: The transition zone between two air masses of different density.
Dynamic Lifting
The forced uplifting of air from various atmospheric processes
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Portions of glossary From the NWS
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Lifting of air caused by its passage up and over mountains or other sloping terrain.
Orographic rain
Precipitation that results from Orographic lift ...
Lifting- The forcing of air in a vertical direction by an upslope in terrain or by the movement of a denser air mass.
Lightning- An electrical discharge produced by a thunderstorm.
Low- An area of low atmospheric pressure.
Lifting of air over hills and mountains
Ozone
An unstable oxygen compound that is a pollutant at ground level, but that absorbs deadly ultraviolet rays in the stratosphere.
The lifting of air over a topographic barrier. Clouds that form in this lifting process are called orographic clouds.
Oscillations(3) ...
LCL - Lifting Condensation Level. The level at which lifted air will saturate.
FORCING - Lifting of air by "mechanical" means such as an advancing front or mountain range. The air being forced aloft may or may not be capeable of rising by itself convectively.
WING - The lifting surface of an aircraft.
WINGLET - A small wing (usually a vertical surface at the tips of the main wing).
WING LOADING - The number of pounds per square foot of wing area.
orographic lifting - Ascending air flow caused by mountains. Mechanisms that produce the lifting fall into two broad categories: 1) the upward deflection of horizontal larger-scale flow by the orography acting as an obstacle or barrier; or 2) the ...
Orographic Lifting
Same as Upslope Flow; occurs when air is forced to rise and cool due to terrain features such as hills or mountains. If the cooling is sufficient, water vapor condenses into clouds. Additional cooling results in rain or snow.
Pressure occuring at movement of first contact termed Ice Impact PressureDynamic LiftingThe forced uplifting of air from various atmospheric processes, such as weather fronts, and cyclones.
Isentropic Lift - Lifting of air that is traveling along an upward-sloping isentropic surface.
It is determined by lifting an air parcel to 500 millibars and then comparing its temperature to that of the environment. If the parcel is colder than its new environment, then the atmosphere is more stable.
Because helium is non-inflammable and has a lifting power 92 percent of that of hydrogen, it is widely used as the inflation gas for meteorological balloons.
For parcels that remain unsaturated during lifting, the dry adiabatic lapse rate is 9.8° per kilometer.adiabatic processA process that takes place without a transfer of heat between the system (e.g., an air parcel) and its surroundings.
Although the two terms are not properly interchangeable, both imply the presence of lifting in low levels.Warm Core LowA low pressure area which is warmer at its center than at its periphery. Tropical cyclones exhibit this temperature pattern.
Isentropic lift often is referred to erroneously as overrunning, but more accurately describes the physical process by which the lifting occurs.
The colder air, being denser, cuts a wedge under the less dense warmer air, lifting it and finally overtaking it. Cold fronts move rapidly.
orographic cloud"Mountain clouds produced by orographic lifting of moist air to saturation.
UPRUpperUpslope FlowSame as Orographic Lifting; air that flows toward higher terrain, and hence is forced to rise.
stable and unstable atmospheric conditions: If a parcel of air is moved upward due to local convergence, convection, orographic lifting, ...
in a slow moving anticyclone, or a tropical maritime airmass, then an air parcel subject to lifting/adiabatic cooling will readily find itself colder than its surroundings ... denser ...
OCCLUDED FRONT- The lifting of one front by another.
OMEGA FORCING- This is in reference to Q-G theory (Quasi-Geostrophic theory). The omega equation states vertical motion is a function of differential vorticity advection and thermal advection.
DRY ADIABAT The line on a Skew T-Log P chart that depicts the lifting of dry air, or air that is unsaturated. As a parcel rises adiabatically, its pressure decreases and its temperature falls due to the expansion of the air parcel.
Orographic uplift The lifting of air over a topographic barrier. Clouds that form in this lifting process are called orographic clouds.
Orographic precipitation Rainfall or snowfall from clouds, induced by topographic uplift.
P ...
Orographic Lift - Lifting of air caused by its passage up and over mountains or other sloping terrain.
Orphan Anvil - [Slang], an anvil from a dissipated thunderstorm, below which no other clouds remain.
In February 1937, such a cyclone lashed the lower west coast on the 9th and 10th, flattening trees, lifting roofs in Perth, and causing considerable damage in Bunbury and Busselton.
ISENTROPIC LIFT/DECENT- Lifting or sinking of air along constant potential temperature (theta) surfaces. WAA (especially over shallow frontal boundaries) leads to lift while CAA leads to decent.
This sometimes happens when a cold front overtakes a warm front (forming an occluded front), lifting the warmer air away from the surface. It is usually relatively short-lived, but shows up as an unusual layer of warm air on an upper air soundiing.
Air may start moving upward because of unequal surface heating, the lifting of warm air along a frontal zone, or diverging upper-level winds (these diverging winds draw air up beneath them).
Cold occlusion: A frontal zone formed when a cold front overtakes a warm front and, being colder than the air ahead of the warm front, slides under the warm front, lifting it aloft. Compare warm occlusion.
Low-level warm advection sometimes is referred to (incorrectly) as overrunning. Although the two terms are not properly interchangeable, both imply the presence of lifting in low levels.
Warm front ...
 See also: Air, Cloud, Clouds, Surface, Temperature
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