Final answer:
MALR and DALR are related to the rate at which the temperature changes with altitude in the Earth's atmosphere. The MALR is always less than the DALR because the presence of water vapor slows down the cooling or warming process. When an air parcel is lifted, its temperature will decrease at a slower rate if it is saturated with water vapor compared to a dry air parcel.
Step-by-step explanation:
MALR (Moist Adiabatic Lapse Rate) and DALR (Dry Adiabatic Lapse Rate) are both related to the rate at which the temperature changes with altitude in the Earth's atmosphere. The MALR is the rate at which a packet of air cools or warms when it is lifted or lowered, taking into account the condensation or evaporation of water vapor. The DALR, on the other hand, represents the rate at which a packet of dry air cools or warms when lifted or lowered. The relationship between the two rates is that the MALR is always less than the DALR. This is because the presence of water vapor in the air adds latent heat and slows down the cooling or warming process. Therefore, when an air parcel is lifted, its temperature will decrease at a slower rate if it is saturated with water vapor compared to a dry air parcel. For example, let's say we have two air parcels being lifted from the surface. One parcel is saturated with water vapor, while the other is completely dry. As both parcels rise and cool, the saturated parcel will cool at a slower rate due to the release of latent heat during condensation. As a result, it will be warmer than the dry parcel at higher altitudes.