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11.01.2012 (1994 Days Ago)
Description

The rate of change of temperature by an ascending or descending airmass.

Example or term where used

The rate of change of temperature by an ascending or descending airmass. If no other non-adiabatic processes (means no heat enters or leaves system) occur(like condensation, evaporation and radiation), expansion causes the parcel of air to cool at a set rate of 0.98° per 100 m. The opposite occurs when a parcel of air descends in the atmosphere. The air in a descending parcel becomes compressed. Compression causes the temperature within the parcel to increase at a rate of 0.98° per 100 m.

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