Which environmental lapse rate represents the most unstable atmosphere in a layer of unsaturated air?
A) 1$\degree$C per 1,000 m
B) 3$\degree$C per 1,000 m
C) 6$\degree$C per 1,000 m
D) 9$\degree$C per 1,000 m
E) 11$\degree$C per 1,000 m

Question

Which environmental lapse rate represents the most unstable atmosphere in a layer of unsaturated air?​
A) ​1$\degree$C per 1,000 m
B) ​3$\degree$C per 1,000 m
C) ​6$\degree$C per 1,000 m
D) ​9$\degree$C per 1,000 m
E) ​11$\degree$C per 1,000 m

Quizplus · Accepted Answer

The most unstable atmosphere in a layer of unsaturated air occurs when the environmental lapse rate is greater than the dry adiabatic rate of 10C per 1000m, which is the rate at which unsaturated air cools as it rises. Among the given options, the highest rate is 11C per 1000m, which is given in choice E. Therefore, E represents the most unstable atmosphere in a layer of unsaturated air.

Which Environmental Lapse Rate Represents the Most Unstable Atmosphere in a Layer