Consider the relationship between adiabatic lapse rates: Statement I: The dry adiabatic lapse rate is approximately 10 degrees Celsius per 1,000 meters of ascent. Statement II: The saturated adiabatic lapse rate is lower than the dry rate because the release of latent heat during condensation partially offsets the cooling effect of expansion. Which of the following is correct?

💡 Solution & Explanation

Both statements are accurate representations of atmospheric thermodynamics where rising unsaturated air cools at the dry adiabatic rate of 10 degrees Celsius per kilometer. Once condensation begins, latent heat is released into the parcel, reducing the net cooling rate to the saturated adiabatic lapse rate, which averages about 6 degrees Celsius per kilometer. This differential governs atmospheric stability and cloud development.