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moist adiabatic lapse rate
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moist adiabatic lapse rate

atmospheric science
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Quick Summary

The moist adiabatic lapse rate refers to the rate at which the temperature of a saturated air parcel decreases as it rises through the atmosphere. This cooling is slower than that of dry air because, as the water vapor condenses, it releases latent heat, which warms the air parcel.1

The moist adiabatic lapse rate is variable because the amount of water vapor in the air changes. When there is more water vapor, the lapse rate is smaller. If an air parcel loses its moisture through condensation, its lapse rate will increase and approach the dry adiabatic rate.1

Understanding the difference between the normal atmospheric lapse rate and the adiabatic lapse rates (both dry and moist) is crucial for meteorologists. It helps them predict atmospheric stability, cloud formation, thunderstorms, and turbulence.1

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