In the study of climatology and atmospheric thermodynamics, which of the following terms defines the rate at which temperature decreases with an increase in altitude for a rising unsaturated parcel of dry air?

💡 Solution & Explanation

The dry adiabatic lapse rate is the precise rate at which a parcel of unsaturated air cools as it ascends adiabatically, approximately 9.8 degrees Celsius per kilometer. It remains constant because no heat is added to or removed from the surrounding environment during the vertical displacement process. The environmental lapse rate varies continuously depending on local weather conditions, whereas the saturated lapse rate is lower due to latent heat release during condensation. Knowledge of parcel stability forms the foundation of severe weather forecasting.