When Environmental Lapse Rate (ELR) is greater than Adiabatic Lapse Rate (ALR), then which of the following occurs?1 MarksChoose Option AA. Super adiabatic lapse rateChoose Option BB. Neutral lapse rateChoose Option CC. Adiabatic lapse rateChoose Option DD. Sub adiabatic lapse rate
Question
When Environmental Lapse Rate (ELR) is greater than Adiabatic Lapse Rate (ALR), then which of the following occurs?1 MarksChoose Option AA. Super adiabatic lapse rateChoose Option BB. Neutral lapse rateChoose Option CC. Adiabatic lapse rateChoose Option DD. Sub adiabatic lapse rate
Solution
When the Environmental Lapse Rate (ELR) is greater than the Adiabatic Lapse Rate (ALR), it results in a Super adiabatic lapse rate. So, the correct answer is Option A.
Here's why:
The lapse rate is the rate at which atmospheric temperature decreases with an increase in altitude. The Environmental Lapse Rate (ELR) is the actual rate of temperature decrease with height for the stationary atmosphere at a specific time under local weather conditions.
On the other hand, the Adiabatic Lapse Rate (ALR) is the rate at which the temperature of an air parcel changes in response to the parcel being lifted or lowered in the atmosphere, assuming no heat exchange with the surrounding environment.
When ELR > ALR, the atmosphere is considered unstable because the air parcel will continue to rise since it is warmer (and therefore less dense) than the surrounding air. This condition is known as a superadiabatic lapse rate.
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