Breaking this down......

Warmer air rises....and colder air comes to the ground.

Now I may learn something here.....so here goes.....

HOW do you know if you're in an area (using the mushroom as an example) that has air rising......or if you're on the outer edge and your actually in an area that is being pushed down?

And.....while we're at it.....Is this sctually occurring all the time? Don't the layers remain intact.....and remain layers until they are heated and rise?

And if that's correct....and you're in a tree 20+'.......how is your scent going to be coming down as the air is heating up (on a cold morning)?