Which of the following processes takes place in a rising unsaturated air parcel?

compression warming

expansion cooling

adiabatic stability

evaporative cooling

Adiabatic stability

Explanation:

Adiabatic stability - Adiabatic implies a situation in which the air parcel and the surrounding region do not exchange heat. It will ultimately undergo cooling whenever a parcel of air increases. Latent heat does not release whenever unsaturated air parcel moves in an upward direction.

Cooling will occur quickly as air parcel is unsaturated, the cooling is at a rate of 10 °C / km. This is called the dry adiabatic rate of lapse. Once the parcel of air becomes sufficiently dense it will start sinking.