Determining Air Parcel Temperature: Rising air parcels and adiabatic cooling

  • consider a sinking parcel of air -->>

  • As the parcel sinks, it will adiabatically compress and warm

  • adiabatic - a process where the parcel temperature changes due to an expansion or compression, no heat is added or taken away from the parcel

  • the parcel compresses since it is moving into a region of higher pressure

  • due to the parcel compression, the air molecules gain internal energy

  • hence, the mean temperature of the parcel increases