The moist adiabatic rate (MAR) is less than the dry adiabatic rate (DAR) because of the release of the latent heat of condensation within the rising parcel of air.

Question

Quizplus · Accepted Answer

The release of latent heat of condensation within the rising parcel of air reduces the cooling rate of the moist adiabatic rate, making it less than the dry adiabatic rate. This is because as the moist air rises and cools, it eventually reaches its dew point temperature and water vapor starts to condense into liquid water. The release of latent heat associated with this process leads to a decrease in the rate of cooling, and thus a lower moist adiabatic rate compared to the dry adiabatic rate.

The Moist Adiabatic Rate (MAR) Is Less Than the Dry