The height at which a rising parcel or layer of air would become saturated if lifted adiabatically.

On a weather chart, a line of equal height; same as contour (1).

The total infrared radiation emitted by the Earth and its atmosphere.

See parcel.

The mass of air surrounding the Earth.

Same as duststorm.

The lowest level at which condensation will occur as a result of convection due to surface heating. When condensation occurs at this level, the layer between the surface and the CCL will be thoroughly [..]

A warm, dry downslope wind; the warmness and dryness being due to adiabatic compression upon descent; characteristic of mountainous regions. See adiabatic process, Chinook, Santa Ana.

The boundary zone between the trade wind system of the Northern and Southern Hemispheres; it is characterized in maritime climates by showery precipitation with cumulonimbus clouds sometimes extending [..]

Denotes sky hidden by surface-based obscuring phenomena and vertical visibility restricted overhead.