On Apr 16, 3:59 pm, Tom L. wrote:
The big question is "why does the wake turbulence descend?"
Is the air volume inside the vortices denser than surrounding air?

Whoa, good guess. I just read a reference that said the vortex
descends until it meets air of its own density and then dissipates.
It was surprising to read. Let me see if I can find that site
again...

Kev