Questions: At a particular height in the atmosphere, an air parcel has a temperature of 15°C, while the environmental temperature is 18°C. Based on these temperatures, the atmosphere at this height is:
unstable
stable
Transcript text: At a particular height in the atmosphere, an air parcel has a temperature of $15^{\circ} \mathrm{C}$, while the environmental temperature is $18^{\circ} \mathrm{C}$. Based on these temperatures, the atmosphere at this height is:
unstable
stable
Solution
Solution Steps
Step 1: Understanding Atmospheric Stability
Atmospheric stability is determined by comparing the temperature of an air parcel to the temperature of the surrounding environment. If the air parcel is warmer than the environment, it will rise, indicating an unstable atmosphere. Conversely, if the air parcel is cooler than the environment, it will sink, indicating a stable atmosphere.
Step 2: Comparing Temperatures
Given:
Temperature of the air parcel: \(15^{\circ} \mathrm{C}\)
Since \(15^{\circ} \mathrm{C}\) (air parcel) is less than \(18^{\circ} \mathrm{C}\) (environment), the air parcel is cooler than the surrounding air.
Step 3: Determining Stability
A cooler air parcel will tend to sink because it is denser than the warmer surrounding air. This indicates that the atmosphere at this height is stable.