Orographic Lifting

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 The lifting of an air current caused by its passage up and over mountains or escarpments.As the air is forced upwards it cools and if moist enough clouds can form and additional cooling results in rain.

Orographic Lifting- The upward flowing of air caused by rising terrain, such as a mountain range. Overrunning- The flow of warm air over cold air in advance of a warm front.

**Orographic Lifting** Forced aloft the rising air cools by expansion and clouds result as we often see along the Blue Mountains north of the Lehigh Valley.

Same as Orographic Lifting; air that flows toward higher terrain, and hence is forced to rise.

In the United States, strong latitudinal or zonal flow may bring copious precipitation to mountainous maritime areas due to strong orographic lifting by north-south mountain ranges (e.g., Cascades and Sierra Nevada ranges).

Orographic LiftingSame 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.

orographic cloud"Mountain clouds produced by orographic lifting of moist air to saturation.

This refers to air which undergoes orographic lifting. Most often, this is in the context of winds such as the chinook or the föhn, which undergo lifting by mountain ranges before descending and warming on the lee side.

OROGRAPHIC LIFTING Where the flow of air is forced up and over barriers such as highlands or mountains. Moist air being forced aloft begins to cool, consequently condensation forms, and rain or snow begins to fall.

Large Cumulonimbus (Cb) clouds are produced with these processes; each cell lasting at least half-an-hour, and depending upon external forcing agents (e.g. coastal convergence, synoptic troughs, orographic lifting), ...

See also: Orographic Lift, Lifting, Orographic, Surface, Weather