Why is the upper atmosphere heterogeneous in nature while the lower is homogeneous?

Question

Why is the upper atmosphere heterogeneous in nature while the lower is homogeneous?

In: 6

Answer 1

If the lower layer were homogenous, we wouldn’t have weather. The lower atmosphere varies in humidity and pressure, and starts to change significantly as you go up in elevation. The entire atmosphere is heterogeneous, just not in the same way.